1 | #*------------------------------------------------------------------- |
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2 | * EMSO Model Library (EML) Copyright (C) 2004 - 2007 ALSOC. |
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3 | * |
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4 | * This LIBRARY is free software; you can distribute it and/or modify |
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5 | * it under the therms of the ALSOC FREE LICENSE as available at |
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6 | * http://www.enq.ufrgs.br/alsoc. |
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7 | * |
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8 | * EMSO Copyright (C) 2004 - 2007 ALSOC, original code |
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9 | * from http://www.rps.eng.br Copyright (C) 2002-2004. |
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10 | * All rights reserved. |
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11 | * |
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12 | * EMSO is distributed under the therms of the ALSOC LICENSE as |
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13 | * available at http://www.enq.ufrgs.br/alsoc. |
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14 | * |
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15 | *---------------------------------------------------------------------- |
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16 | * File containg models of columns: distillation, stripping, absorbers |
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17 | * rectifier, .... |
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18 | * |
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19 | * The default nomenclature is: |
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20 | * Type_Column_reboilertype_condensertyper |
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21 | * |
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22 | * where: |
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23 | * Type = refluxed or reboiled or section |
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24 | * Column = Stripping, Absorption, Rectifier, Distillation |
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25 | * Reboiler type (if exists) = kettle or thermosyphon |
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26 | * Condenser type (if exists) = with subccoling or without subcooling |
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27 | * |
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28 | *----------------------------------------------------------------------- |
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29 | * Author: Paula B. Staudt |
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30 | * $Id: column.mso 511 2008-05-12 17:25:33Z paula $ |
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31 | *---------------------------------------------------------------------*# |
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32 | |
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33 | using "tray"; |
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34 | using "reboiler"; |
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35 | using "condenser"; |
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36 | using "mixers_splitters/splitter"; |
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37 | using "tank"; |
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38 | using "pressure_changers/pump"; |
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39 | |
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40 | Model ControlSection |
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41 | |
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42 | ATTRIBUTES |
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43 | Pallete = false; |
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44 | Brief = "Control variables for column section."; |
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45 | |
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46 | PARAMETERS |
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47 | outer NComp as Integer (Brief="Number of components"); |
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48 | |
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49 | Tindicator_TrayNumber as Integer (Brief="Temperature Indicator in the tray"); |
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50 | Pindicator_TrayNumber as Integer (Brief="Pressure Indicator in the tray"); |
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51 | |
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52 | end |
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53 | |
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54 | Model InitializeSection |
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55 | |
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56 | ATTRIBUTES |
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57 | Pallete = false; |
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58 | Brief = "Initial conditions for column section."; |
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59 | |
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60 | PARAMETERS |
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61 | outer NComp as Integer (Brief="Number of components"); |
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62 | |
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63 | TopTemperature as temperature (Brief = "Tray Temperature at Column Top", Default = 300); |
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64 | BottomTemperature as temperature (Brief = "Tray Temperature at Column Bottom", Default = 330); |
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65 | LevelFraction as fraction (Brief = "Tray Level Fraction", Default = 0.5); |
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66 | |
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67 | TopComposition(NComp) as fraction (Brief = "Component Molar Fraction at Column Top", Default = 0.30); |
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68 | BottomComposition(NComp) as fraction (Brief = "Component Molar Fraction at Column Bottom", Default = 0.30); |
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69 | |
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70 | end |
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71 | |
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72 | Model InitializeStage |
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73 | |
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74 | ATTRIBUTES |
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75 | Pallete = false; |
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76 | Brief = "Initial conditions for Packed column section."; |
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77 | |
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78 | PARAMETERS |
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79 | outer NComp as Integer (Brief="Number of components"); |
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80 | |
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81 | TopStageTemperature as temperature (Brief = "Tray Temperature at Column Top", Default = 300); |
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82 | BottomStageTemperature as temperature (Brief = "Tray Temperature at Column Bottom", Default = 300); |
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83 | |
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84 | TopStageComposition(NComp) as fraction (Brief = "Component Molar Fraction at Top"); |
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85 | BottomStageComposition(NComp) as fraction (Brief = "Component Molar Fraction at Bottom"); |
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86 | LiquidMolarHoldup as mol (Brief="Molar liquid holdup", Default=0.01); |
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87 | |
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88 | end |
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89 | |
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90 | Model Section_ColumnBasic |
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91 | |
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92 | ATTRIBUTES |
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93 | Pallete = false; |
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94 | Brief = "Model of a basic column section."; |
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95 | Info = |
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96 | "Model of a basic column section containing a vetor of TRAYS numbered from the top-down."; |
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97 | |
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98 | PARAMETERS |
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99 | outer PP as Plugin (Brief="External Physical Properties", Type="PP"); |
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100 | outer NComp as Integer (Brief="Number of components"); |
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101 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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102 | # Section Column Feed Tray - Side Streams Location and Numbering |
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103 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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104 | NumberOfTrays as Integer (Brief="Number of trays", Default=8); |
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105 | FeedTrayIndex(NumberOfTrays) as Integer (Brief="Feed Tray Index", Default=0,Hidden=true); |
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106 | LiqSideTrayIndex(NumberOfTrays) as Integer (Brief="Liquid Side Tray Index", Default=0,Hidden=true); |
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107 | VapSideTrayIndex(NumberOfTrays) as Integer (Brief="Vapour Side Tray Index", Default=0,Hidden=true); |
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108 | FeedTrayLocation as Integer (Brief="Feed tray Location", Default=2); |
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109 | LiquidSideStreamLocation as Integer (Brief="Liquid Side Stream Location", Default=2); |
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110 | VapourSideStreamLocation as Integer (Brief="Vapour Side Stream Location", Default=2); |
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111 | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
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112 | Mw(NComp) as molweight (Brief="Component Mol Weight",Hidden=true); |
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113 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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114 | # Section Column Flow Model for Liquid and Vapour |
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115 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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116 | VapourFlowModel as Switcher (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer"); |
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117 | LiquidFlowModel as Switcher (Valid = ["default", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "default"); |
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118 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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119 | # Section Column Tray Geometry and Auxiliar Parameters |
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120 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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121 | VolumeOfTray as volume (Brief="Total Volume of the tray"); |
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122 | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
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123 | PlateArea as area (Brief="Plate area = Atray - Adowncomer"); |
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124 | HolesArea as area (Brief="Total holes area"); |
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125 | WeirLength as length (Brief="Weir length"); |
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126 | WeirHeight as length (Brief="Weir height"); |
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127 | FeeheryCoeff as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1); |
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128 | ElgueCoeff as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1); |
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129 | OlsenCoeff as Real (Brief="Olsens correlation coefficient", Default=1); |
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130 | TrayLiquidPasses as Real (Brief="Number of liquid passes in the tray", Default=1); |
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131 | |
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132 | V as volume (Brief="Total Volume of the tray",Hidden=true); |
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133 | Q as heat_rate (Brief="Rate of heat supply",Hidden=true); |
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134 | Ap as area (Brief="Plate area = Atray - Adowncomer",Hidden=true); |
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135 | Ah as area (Brief="Total holes area",Hidden=true); |
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136 | lw as length (Brief="Weir length",Hidden=true); |
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137 | hw as length (Brief="Weir height",Hidden=true); |
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138 | beta as fraction (Brief="Aeration fraction"); |
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139 | alfa as fraction (Brief="Dry pressure drop coefficient"); |
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140 | w as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true); |
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141 | btray as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true); |
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142 | fw as Real (Brief="Olsens correlation coefficient", Default=1,Hidden=true); |
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143 | Np as Real (Brief="Number of liquid passes in the tray", Default=1,Hidden=true); |
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144 | |
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145 | VapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
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146 | LiquidFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
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147 | |
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148 | SET |
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149 | FeedTrayIndex(FeedTrayLocation) =1; |
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150 | VapSideTrayIndex(FeedTrayLocation) =1; |
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151 | LiqSideTrayIndex(FeedTrayLocation) =1; |
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152 | Mw = PP.MolecularWeight(); |
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153 | |
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154 | V=VolumeOfTray; |
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155 | Q=HeatSupply; |
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156 | Ap=PlateArea; |
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157 | Ah=HolesArea; |
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158 | lw=WeirLength; |
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159 | hw=WeirHeight ; |
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160 | w=FeeheryCoeff; |
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161 | btray=ElgueCoeff; |
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162 | fw=OlsenCoeff; |
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163 | Np=TrayLiquidPasses; |
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164 | |
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165 | VARIABLES |
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166 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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167 | # Tray Initialization For the Whole Column Section |
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168 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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169 | INITIALIZATION as InitializeSection (Brief = "Column Model Initialization"); |
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170 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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171 | # Control Ports |
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172 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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173 | CONTROL as ControlSection (Brief = "Control"); |
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174 | out TCI as control_signal (Brief="Temperature Indicator", Protected = true, PosX=1, PosY=0.90); |
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175 | out PCI as control_signal (Brief="Pressure Indicator", Protected = true, PosX=1, PosY=0.80); |
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176 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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177 | # Column Feed - Side Stream Flow and Murphree Efficiency |
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178 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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179 | in FeedTray as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
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180 | TRAYS(NumberOfTrays) as tray (Brief="Number of trays in the Column Section"); |
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181 | VapourDrawOffFlow as flow_mol (Brief="Stream Molar Flow Rate"); |
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182 | LiquidDrawOffFlow as flow_mol (Brief="Stream Molar Flow Rate"); |
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183 | MurphreeEff as Real (Brief="Murphree efficiency for All Trays"); |
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184 | |
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185 | CONNECTIONS |
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186 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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187 | # Connecting Intermediate Trays |
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188 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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189 | TRAYS([2:NumberOfTrays]).OutletVapour to TRAYS([1:NumberOfTrays-1]).InletVapour; |
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190 | TRAYS([1:NumberOfTrays-1]).OutletLiquid to TRAYS([2:NumberOfTrays]).InletLiquid; |
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191 | |
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192 | INITIAL |
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193 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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194 | # Tray Initialization |
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195 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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196 | for i in 1:NumberOfTrays do |
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197 | |
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198 | "The initial temperature of the TRAYS" |
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199 | TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1)); |
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200 | |
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201 | "The initial Level of the TRAYS" |
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202 | TRAYS(i).Level = INITIALIZATION.LevelFraction*hw; |
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203 | end |
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204 | |
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205 | for i in 1:NComp-1 do |
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206 | |
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207 | for j in 1:NumberOfTrays do |
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208 | |
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209 | "The initial composition of the TRAYS - Normalized" |
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210 | TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1)); |
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211 | end |
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212 | |
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213 | end |
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214 | |
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215 | EQUATIONS |
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216 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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217 | # Control Ports |
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218 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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219 | |
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220 | "Tray Temperature Indicator" |
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221 | #TCI*'K' = TRAYS(min([NumberOfTrays, CONTROL.Tindicator_TrayNumber])).OutletVapour.T; |
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222 | TCI*'K' = TRAYS(CONTROL.Tindicator_TrayNumber).OutletVapour.T; |
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223 | |
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224 | "Tray Pressure Indicator" |
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225 | #PCI*'atm' = TRAYS(min([NumberOfTrays, CONTROL.Pindicator_TrayNumber])).OutletVapour.P; |
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226 | PCI*'atm' = TRAYS(CONTROL.Pindicator_TrayNumber).OutletVapour.P; |
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227 | |
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228 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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229 | # Equating Feed Tray Variables to Trays Variables |
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230 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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231 | "Feed Tray Inlet Flow" |
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232 | FeedTray.F*FeedTrayIndex= TRAYS.Inlet.F; |
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233 | |
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234 | "Feed Tray Inlet Temperature" |
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235 | FeedTray.T = TRAYS.Inlet.T; |
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236 | |
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237 | "Feed Tray Inlet Pressure" |
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238 | FeedTray.P = TRAYS.Inlet.P; |
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239 | |
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240 | "Feed Tray Inlet Composition" |
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241 | FeedTray.z = TRAYS.Inlet.z; |
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242 | |
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243 | "Feed Tray Inlet Vapour Fraction" |
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244 | FeedTray.v = TRAYS.Inlet.v; |
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245 | |
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246 | "Feed Tray Inlet Enthalpy" |
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247 | FeedTray.h = TRAYS.Inlet.h; |
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248 | |
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249 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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250 | # Trays Equations |
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251 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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252 | |
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253 | for i in [1:NumberOfTrays] do |
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254 | |
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255 | "Murphree Efficiency" |
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256 | TRAYS(i).OutletVapour.z = MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z; |
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257 | |
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258 | "Level of clear liquid over the weir" |
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259 | TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/Ap; |
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260 | |
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261 | "Geometry Constraint" |
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262 | V = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV; |
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263 | |
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264 | "Energy Holdup" |
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265 | TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*V; |
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266 | |
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267 | "Energy Balance" |
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268 | diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h |
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269 | -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + Q ); |
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270 | |
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271 | switch LiquidFlow |
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272 | case "on": |
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273 | switch LiquidFlowModel |
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274 | case "default": |
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275 | "Francis Equation" |
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276 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*lw*((TRAYS(i).Level-(beta*hw))/(beta))^2; |
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277 | |
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278 | case "Wang_Fl": |
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279 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'m^0.5/s'*lw*((TRAYS(i).Level-(beta*hw))/(beta))^1.5; |
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280 | |
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281 | case "Olsen": |
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282 | TRAYS(i).OutletLiquid.F / 'mol/s'= lw*Np*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletVapour.z)/(0.665*fw)^1.5 * ((TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/TRAYS(i).rhoL/Ap)-hw)^1.5 * 'm^0.5/mol'; |
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283 | |
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284 | case "Feehery_Fl": |
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285 | TRAYS(i).OutletLiquid.F = lw*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z) * ((TRAYS(i).Level-hw)/750/'mm')^1.5 * 'm^2/s'; |
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286 | |
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287 | case "Roffel_Fl": |
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288 | TRAYS(i).OutletLiquid.F = 2/3*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z)*lw*(TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/(Ap*1.3)/TRAYS(i).rhoL)^1.5*sqrt(2*g/ |
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289 | (2*(1 - 0.3593/'Pa^0.0888545'*abs(TRAYS(i).OutletVapour.F*sum(Mw*TRAYS(i).OutletVapour.z)/(Ap*1.3)/sqrt(TRAYS(i).rhoV))^0.177709)-1)); #/'(kg/m)^0.0888545/s^0.177709'; |
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290 | end |
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291 | when TRAYS(i).Level < (beta *hw) switchto "off"; |
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292 | |
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293 | case "off": |
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294 | "Low level" |
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295 | TRAYS(i).OutletLiquid.F = 0 * 'mol/h'; |
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296 | when TRAYS(i).Level > (beta * hw) + 1e-6*'m' switchto "on"; |
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297 | end |
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298 | |
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299 | switch VapourFlow |
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300 | case "on": |
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301 | switch VapourFlowModel |
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302 | case "Reepmeyer": |
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303 | TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/(TRAYS(i).rhoV*alfa))*Ah; |
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304 | |
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305 | case "Feehery_Fv": |
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306 | TRAYS(i).InletVapour.F = TRAYS(i).rhoV/Ap/w/sum(Mw*TRAYS(i).OutletVapour.z) * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-(TRAYS(i).rhoV*g*TRAYS(i).ML*TRAYS(i).vL/Ap))/TRAYS(i).rhoV); |
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307 | |
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308 | case "Roffel_Fv": |
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309 | TRAYS(i).InletVapour.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)*1e5 - (beta*sum(TRAYS(i).M*Mw)/(Ap*1.3)*g*1e5) * (TRAYS(i).rhoV*Ah/sum(Mw*TRAYS(i).OutletVapour.z))^1.08 * 'm^1.08/mol^1.08'; |
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310 | |
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311 | case "Klingberg": |
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312 | TRAYS(i).InletVapour.F * TRAYS(i).vV = Ap * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV); |
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313 | |
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314 | case "Wang_Fv": |
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315 | TRAYS(i).InletVapour.F * TRAYS(i).vV = Ap * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV*alfa); |
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316 | |
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317 | case "Elgue": |
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318 | TRAYS(i).InletVapour.F = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/btray); |
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319 | end |
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320 | when TRAYS(i).InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
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321 | |
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322 | case "off": |
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323 | TRAYS(i).InletVapour.F = 0 * 'mol/s'; |
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324 | when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL + 1e-1 * 'atm' switchto "on"; |
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325 | end |
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326 | |
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327 | end |
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328 | |
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329 | end |
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330 | |
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331 | |
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332 | |
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333 | |
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334 | |
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335 | Model Section_Column |
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336 | |
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337 | ATTRIBUTES |
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338 | Pallete = true; |
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339 | Icon = "icon/SectionColumn"; |
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340 | Brief = "Model of a column section."; |
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341 | Info = |
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342 | "== Model of a column section containing == |
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343 | * NumberOfTrays TRAYS. |
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344 | |
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345 | == Specify == |
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346 | * the feed stream of each tray (Inlet); |
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347 | * the Murphree eficiency for each tray Emv; |
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348 | * the InletLiquid stream of the top tray; |
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349 | * the InletVapour stream of the bottom tray. |
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350 | |
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351 | == Initial Conditions == |
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352 | * the TRAYS temperature (OutletLiquid.T); |
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353 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
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354 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
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355 | "; |
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356 | |
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357 | PARAMETERS |
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358 | outer PP as Plugin (Brief="External Physical Properties", Type="PP"); |
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359 | outer NComp as Integer (Brief="Number of components"); |
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360 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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361 | # Section Column Feed Tray - Side Streams Location and Numbering |
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362 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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363 | NumberOfTrays as Integer (Brief="Number of trays", Default=8); |
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364 | FeedTrayIndex(NumberOfTrays) as Integer (Brief="Feed Tray Index", Default=0,Hidden=true); |
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365 | LiqSideTrayIndex(NumberOfTrays) as Integer (Brief="Liquid Side Tray Index", Default=0,Hidden=true); |
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366 | VapSideTrayIndex(NumberOfTrays) as Integer (Brief="Vapour Side Tray Index", Default=0,Hidden=true); |
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367 | FeedTrayLocation as Integer (Brief="Feed tray Location", Default=2); |
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368 | LiquidSideStreamLocation as Integer (Brief="Liquid Side Stream Location", Default=2); |
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369 | VapourSideStreamLocation as Integer (Brief="Vapour Side Stream Location", Default=2); |
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370 | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
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371 | Mw(NComp) as molweight (Brief="Component Mol Weight",Hidden=true); |
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372 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
373 | # Section Column Flow Model for Liquid and Vapour |
---|
374 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
375 | VapourFlowModel as Switcher (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer"); |
---|
376 | LiquidFlowModel as Switcher (Valid = ["default", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "default"); |
---|
377 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
378 | # Section Column Tray Geometry and Auxiliar Parameters |
---|
379 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
380 | VolumeOfTray as volume (Brief="Total Volume of the tray"); |
---|
381 | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
---|
382 | PlateArea as area (Brief="Plate area = Atray - Adowncomer"); |
---|
383 | HolesArea as area (Brief="Total holes area"); |
---|
384 | WeirLength as length (Brief="Weir length"); |
---|
385 | WeirHeight as length (Brief="Weir height"); |
---|
386 | FeeheryCoeff as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1); |
---|
387 | ElgueCoeff as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1); |
---|
388 | OlsenCoeff as Real (Brief="Olsens correlation coefficient", Default=1); |
---|
389 | TrayLiquidPasses as Real (Brief="Number of liquid passes in the tray", Default=1); |
---|
390 | |
---|
391 | V as volume (Brief="Total Volume of the tray",Hidden=true); |
---|
392 | Q as heat_rate (Brief="Rate of heat supply",Hidden=true); |
---|
393 | Ap as area (Brief="Plate area = Atray - Adowncomer",Hidden=true); |
---|
394 | Ah as area (Brief="Total holes area",Hidden=true); |
---|
395 | lw as length (Brief="Weir length",Hidden=true); |
---|
396 | hw as length (Brief="Weir height",Hidden=true); |
---|
397 | beta as fraction (Brief="Aeration fraction"); |
---|
398 | alfa as fraction (Brief="Dry pressure drop coefficient"); |
---|
399 | w as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true); |
---|
400 | btray as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true); |
---|
401 | fw as Real (Brief="Olsens correlation coefficient", Default=1,Hidden=true); |
---|
402 | Np as Real (Brief="Number of liquid passes in the tray", Default=1,Hidden=true); |
---|
403 | |
---|
404 | VapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
405 | LiquidFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
406 | |
---|
407 | SET |
---|
408 | FeedTrayIndex(FeedTrayLocation) =1; |
---|
409 | VapSideTrayIndex(FeedTrayLocation) =1; |
---|
410 | LiqSideTrayIndex(FeedTrayLocation) =1; |
---|
411 | Mw = PP.MolecularWeight(); |
---|
412 | |
---|
413 | V=VolumeOfTray; |
---|
414 | Q=HeatSupply; |
---|
415 | Ap=PlateArea; |
---|
416 | Ah=HolesArea; |
---|
417 | lw=WeirLength; |
---|
418 | hw=WeirHeight ; |
---|
419 | w=FeeheryCoeff; |
---|
420 | btray=ElgueCoeff; |
---|
421 | fw=OlsenCoeff; |
---|
422 | Np=TrayLiquidPasses; |
---|
423 | |
---|
424 | VARIABLES |
---|
425 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
426 | # Tray Initialization For the Whole Column Section |
---|
427 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
428 | INITIALIZATION as InitializeSection (Brief = "Column Model Initialization"); |
---|
429 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
430 | # Control Ports |
---|
431 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
432 | CONTROL as ControlSection (Brief = "Control"); |
---|
433 | out TCI as control_signal (Brief="Temperature Indicator", Protected = true, PosX=1, PosY=0.90); |
---|
434 | out PCI as control_signal (Brief="Pressure Indicator", Protected = true, PosX=1, PosY=0.80); |
---|
435 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
436 | # Section Inlet Liquid and Outlet Vapour Material Ports |
---|
437 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
438 | in LiquidInlet as stream (Brief="Liquid Inlet in the section", PosX=0.70, PosY=0); |
---|
439 | out VapourOutlet as vapour_stream (Brief="Vapour Outlet in the section", PosX=0.30, PosY=0); |
---|
440 | |
---|
441 | out VapourDrawOff as vapour_stream (Brief="Vapour Draw Off Port in the section", PosX=1, PosY=0.35,Protected = true); |
---|
442 | out LiquidDrawOff as liquid_stream (Brief="Liquid Draw Off Port in the section", PosX=1, PosY=0.65,Protected = true); |
---|
443 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
444 | # Column Feed - Side Stream Flow and Murphree Efficiency |
---|
445 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
446 | in FeedTray as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
---|
447 | TRAYS(NumberOfTrays) as tray (Brief="Number of trays in the Column Section"); |
---|
448 | VapourDrawOffFlow as flow_mol (Brief="Stream Molar Flow Rate"); |
---|
449 | LiquidDrawOffFlow as flow_mol (Brief="Stream Molar Flow Rate"); |
---|
450 | MurphreeEff as positive (Brief="Murphree efficiency for All Trays"); |
---|
451 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
452 | # Section Inlet Vapour and Outlet Liquid Material Ports |
---|
453 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
454 | in VapourInlet as stream (Brief="Vapour Inlet in the section", PosX=0.30, PosY=1); |
---|
455 | out LiquidOutlet as liquid_stream (Brief="Liquid Outlet in the section", PosX=0.70, PosY=1); |
---|
456 | |
---|
457 | LiquidConnector as stream (Brief="Liquid connection in the middle TRAYS", PosX=0.75, PosY=1,Hidden=true); |
---|
458 | VapourConnector as stream (Brief="Vapour connection in the middle TRAYS", PosX=0.55, PosY=0,Hidden=true); |
---|
459 | |
---|
460 | CONNECTIONS |
---|
461 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
462 | # Connecting Intermediate Trays |
---|
463 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
464 | TRAYS([2:NumberOfTrays]).OutletVapour to TRAYS([1:NumberOfTrays-1]).InletVapour; |
---|
465 | TRAYS([1:NumberOfTrays-1]).OutletLiquid to TRAYS([2:NumberOfTrays]).InletLiquid; |
---|
466 | |
---|
467 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
468 | # Connecting Connectors |
---|
469 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
470 | LiquidConnector to TRAYS(1).InletLiquid; |
---|
471 | VapourConnector to TRAYS(NumberOfTrays).InletVapour; |
---|
472 | |
---|
473 | INITIAL |
---|
474 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
475 | # Tray Initialization |
---|
476 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
477 | for i in 1:NumberOfTrays do |
---|
478 | |
---|
479 | "The initial temperature of the TRAYS" |
---|
480 | TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1)); |
---|
481 | |
---|
482 | "The initial Level of the TRAYS" |
---|
483 | TRAYS(i).Level = INITIALIZATION.LevelFraction*hw; |
---|
484 | end |
---|
485 | |
---|
486 | for i in 1:NComp-1 do |
---|
487 | |
---|
488 | for j in 1:NumberOfTrays do |
---|
489 | |
---|
490 | "The initial composition of the TRAYS - Normalized" |
---|
491 | TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1)); |
---|
492 | end |
---|
493 | |
---|
494 | end |
---|
495 | |
---|
496 | EQUATIONS |
---|
497 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
498 | # Control Ports |
---|
499 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
500 | |
---|
501 | "Tray Temperature Indicator" |
---|
502 | #TCI*'K' = TRAYS(min([NumberOfTrays, CONTROL.Tindicator_TrayNumber])).OutletVapour.T; |
---|
503 | TCI*'K' = TRAYS(CONTROL.Tindicator_TrayNumber).OutletVapour.T; |
---|
504 | |
---|
505 | "Tray Pressure Indicator" |
---|
506 | #PCI*'atm' = TRAYS(min([NumberOfTrays, CONTROL.Pindicator_TrayNumber])).OutletVapour.P; |
---|
507 | PCI*'atm' = TRAYS(CONTROL.Pindicator_TrayNumber).OutletVapour.P; |
---|
508 | |
---|
509 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
510 | # Equating Feed Tray Variables to Trays Variables |
---|
511 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
512 | "Feed Tray Inlet Flow" |
---|
513 | FeedTray.F*FeedTrayIndex= TRAYS.Inlet.F; |
---|
514 | |
---|
515 | "Feed Tray Inlet Temperature" |
---|
516 | FeedTray.T = TRAYS.Inlet.T; |
---|
517 | |
---|
518 | "Feed Tray Inlet Pressure" |
---|
519 | FeedTray.P = TRAYS.Inlet.P; |
---|
520 | |
---|
521 | "Feed Tray Inlet Composition" |
---|
522 | FeedTray.z = TRAYS.Inlet.z; |
---|
523 | |
---|
524 | "Feed Tray Inlet Vapour Fraction" |
---|
525 | FeedTray.v = TRAYS.Inlet.v; |
---|
526 | |
---|
527 | "Feed Tray Inlet Enthalpy" |
---|
528 | FeedTray.h = TRAYS.Inlet.h; |
---|
529 | |
---|
530 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
531 | # Trays Equations |
---|
532 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
533 | for i in [1:NumberOfTrays] do |
---|
534 | |
---|
535 | "Murphree Efficiency" |
---|
536 | TRAYS(i).OutletVapour.z = MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z; |
---|
537 | |
---|
538 | "Level of clear liquid over the weir" |
---|
539 | TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/Ap; |
---|
540 | |
---|
541 | "Geometry Constraint" |
---|
542 | V = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV; |
---|
543 | |
---|
544 | "Energy Holdup" |
---|
545 | TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*V; |
---|
546 | |
---|
547 | "Energy Balance" |
---|
548 | diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h |
---|
549 | -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + Q ); |
---|
550 | |
---|
551 | switch LiquidFlow |
---|
552 | case "on": |
---|
553 | switch LiquidFlowModel |
---|
554 | case "default": |
---|
555 | "Francis Equation" |
---|
556 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*lw*((TRAYS(i).Level-(beta*hw))/(beta))^2; |
---|
557 | |
---|
558 | case "Wang_Fl": |
---|
559 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'m^0.5/s'*lw*((TRAYS(i).Level-(beta*hw))/(beta))^1.5; |
---|
560 | |
---|
561 | case "Olsen": |
---|
562 | TRAYS(i).OutletLiquid.F / 'mol/s'= lw*Np*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletVapour.z)/(0.665*fw)^1.5 * ((TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/TRAYS(i).rhoL/Ap)-hw)^1.5 * 'm^0.5/mol'; |
---|
563 | |
---|
564 | case "Feehery_Fl": |
---|
565 | TRAYS(i).OutletLiquid.F = lw*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z) * ((TRAYS(i).Level-hw)/750/'mm')^1.5 * 'm^2/s'; |
---|
566 | |
---|
567 | case "Roffel_Fl": |
---|
568 | TRAYS(i).OutletLiquid.F = 2/3*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z)*lw*(TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/(Ap*1.3)/TRAYS(i).rhoL)^1.5*sqrt(2*g/ |
---|
569 | (2*(1 - 0.3593/'Pa^0.0888545'*abs(TRAYS(i).OutletVapour.F*sum(Mw*TRAYS(i).OutletVapour.z)/(Ap*1.3)/sqrt(TRAYS(i).rhoV))^0.177709)-1)); #/'(kg/m)^0.0888545/s^0.177709'; |
---|
570 | end |
---|
571 | when TRAYS(i).Level < (beta *hw) switchto "off"; |
---|
572 | |
---|
573 | case "off": |
---|
574 | "Low level" |
---|
575 | TRAYS(i).OutletLiquid.F = 0 * 'mol/h'; |
---|
576 | when TRAYS(i).Level > (beta * hw) + 1e-6*'m' switchto "on"; |
---|
577 | end |
---|
578 | |
---|
579 | switch VapourFlow |
---|
580 | case "on": |
---|
581 | switch VapourFlowModel |
---|
582 | case "Reepmeyer": |
---|
583 | TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/(TRAYS(i).rhoV*alfa))*Ah; |
---|
584 | |
---|
585 | case "Feehery_Fv": |
---|
586 | TRAYS(i).InletVapour.F = TRAYS(i).rhoV/Ap/w/sum(Mw*TRAYS(i).OutletVapour.z) * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-(TRAYS(i).rhoV*g*TRAYS(i).ML*TRAYS(i).vL/Ap))/TRAYS(i).rhoV); |
---|
587 | |
---|
588 | case "Roffel_Fv": |
---|
589 | TRAYS(i).InletVapour.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)*1e5 - (beta*sum(TRAYS(i).M*Mw)/(Ap*1.3)*g*1e5) * (TRAYS(i).rhoV*Ah/sum(Mw*TRAYS(i).OutletVapour.z))^1.08 * 'm^1.08/mol^1.08'; |
---|
590 | |
---|
591 | case "Klingberg": |
---|
592 | TRAYS(i).InletVapour.F * TRAYS(i).vV = Ap * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV); |
---|
593 | |
---|
594 | case "Wang_Fv": |
---|
595 | TRAYS(i).InletVapour.F * TRAYS(i).vV = Ap * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV*alfa); |
---|
596 | |
---|
597 | case "Elgue": |
---|
598 | TRAYS(i).InletVapour.F = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/btray); |
---|
599 | end |
---|
600 | when TRAYS(i).InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
601 | |
---|
602 | case "off": |
---|
603 | TRAYS(i).InletVapour.F = 0 * 'mol/s'; |
---|
604 | when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL + 1e-1 * 'atm' switchto "on"; |
---|
605 | end |
---|
606 | |
---|
607 | end |
---|
608 | |
---|
609 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
610 | # Equating Inlet Liquid Connector Variables |
---|
611 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
612 | "Liquid Inlet Flow" |
---|
613 | LiquidConnector.F = LiquidInlet.F; |
---|
614 | |
---|
615 | "Liquid Inlet Temperature" |
---|
616 | LiquidConnector.T = LiquidInlet.T; |
---|
617 | |
---|
618 | "Liquid Inlet Pressure" |
---|
619 | LiquidConnector.P = LiquidInlet.P; |
---|
620 | |
---|
621 | "Liquid Inlet Composition" |
---|
622 | LiquidConnector.z = LiquidInlet.z; |
---|
623 | |
---|
624 | "Liquid Inlet Vapour Fraction" |
---|
625 | LiquidConnector.v = LiquidInlet.v; |
---|
626 | |
---|
627 | "Liquid Inlet Enthalpy" |
---|
628 | LiquidConnector.h = LiquidInlet.h; |
---|
629 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
630 | # Equating Inlet Vapour Connector Variables |
---|
631 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
632 | "Vapour Inlet Flow" |
---|
633 | VapourConnector.F = VapourInlet.F; |
---|
634 | |
---|
635 | "Vapour Inlet Temperature" |
---|
636 | VapourConnector.T = VapourInlet.T; |
---|
637 | |
---|
638 | "Vapour Inlet Pressure" |
---|
639 | VapourConnector.P = VapourInlet.P; |
---|
640 | |
---|
641 | "Vapour Inlet Composition" |
---|
642 | VapourConnector.z = VapourInlet.z; |
---|
643 | |
---|
644 | "Vapour Inlet Vapour Fraction" |
---|
645 | VapourConnector.v = VapourInlet.v; |
---|
646 | |
---|
647 | "Vapour Inlet Enthalpy" |
---|
648 | VapourConnector.h = VapourInlet.h; |
---|
649 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
650 | # Equating Outlet Liquid Variables |
---|
651 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
652 | "Liquid Outlet Flow" |
---|
653 | LiquidOutlet.F = TRAYS(NumberOfTrays).OutletLiquid.F; |
---|
654 | |
---|
655 | "Liquid Outlet Temperature" |
---|
656 | LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T; |
---|
657 | |
---|
658 | "Liquid Outlet Pressure" |
---|
659 | LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P; |
---|
660 | |
---|
661 | "Liquid Outlet Composition" |
---|
662 | LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z; |
---|
663 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
664 | # Equating Outlet Vapour Variables |
---|
665 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
666 | "Vapour Outlet Flow" |
---|
667 | VapourOutlet.F = TRAYS(1).OutletVapour.F; |
---|
668 | |
---|
669 | "Vapour Outlet Temperature" |
---|
670 | VapourOutlet.T = TRAYS(1).OutletVapour.T; |
---|
671 | |
---|
672 | "Vapour Outlet Pressure" |
---|
673 | VapourOutlet.P = TRAYS(1).OutletVapour.P; |
---|
674 | |
---|
675 | "Vapour Outlet Composition" |
---|
676 | VapourOutlet.z = TRAYS(1).OutletVapour.z; |
---|
677 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
678 | # Equating Outlet Vapour Side Stream Variables |
---|
679 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
680 | "Vapour Draw Off Stream - Flow" |
---|
681 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
682 | |
---|
683 | "Vapour Draw Off Stream - Temperature" |
---|
684 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
685 | |
---|
686 | "Vapour Draw Off Stream - Pressure" |
---|
687 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
688 | |
---|
689 | "Vapour Draw Off Stream - Composition" |
---|
690 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
691 | |
---|
692 | "Vapour Draw Off Stream" |
---|
693 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
694 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
695 | # Equating Outlet Liquid Side Stream Variables |
---|
696 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
697 | "Liquid Draw Off Stream - Flow" |
---|
698 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
699 | |
---|
700 | "Liquid Draw Off Stream - Temperature" |
---|
701 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
702 | |
---|
703 | "Liquid Draw Off Stream - Pressure" |
---|
704 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
705 | |
---|
706 | "Liquid Draw Off Stream - Composition" |
---|
707 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
708 | |
---|
709 | "Liquid Draw Off Stream" |
---|
710 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
711 | |
---|
712 | end |
---|
713 | |
---|
714 | Model Distillation_kettle_cond as Section_ColumnBasic |
---|
715 | |
---|
716 | ATTRIBUTES |
---|
717 | Pallete = true; |
---|
718 | Icon = "icon/DistillationKettleCond"; |
---|
719 | Brief = "Model of a distillation column with dynamic condenser and dynamic reboiler."; |
---|
720 | Info = |
---|
721 | "== Specify == |
---|
722 | * the feed stream of each tray (Inlet); |
---|
723 | * the Murphree eficiency for each tray Emv; |
---|
724 | * the pump pressure difference; |
---|
725 | * the heat supllied in reboiler and condenser; |
---|
726 | * the condenser vapor outlet flow (OutletVapour.F); |
---|
727 | * the reboiler liquid outlet flow (OutletLiquid.F); |
---|
728 | * both splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
729 | |
---|
730 | == Initial Conditions == |
---|
731 | * the TRAYS temperature (OutletLiquid.T); |
---|
732 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
733 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
734 | |
---|
735 | * the condenser temperature (OutletLiquid.T); |
---|
736 | * the condenser liquid level (Level); |
---|
737 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
738 | |
---|
739 | * the reboiler temperature (OutletLiquid.T); |
---|
740 | * the reboiler liquid level (Level); |
---|
741 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
742 | "; |
---|
743 | |
---|
744 | PARAMETERS |
---|
745 | CondenserVapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
746 | |
---|
747 | VARIABLES |
---|
748 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.375,Protected = true); |
---|
749 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.42,Protected = true); |
---|
750 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
751 | # Column Devices |
---|
752 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
753 | CONDENSER as condenser; |
---|
754 | REBOILER as reboiler; |
---|
755 | SPLITTER as splitter2; |
---|
756 | PUMP as pump; |
---|
757 | alfaTopo as Real; |
---|
758 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
759 | # Heat Ports |
---|
760 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
761 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler",Protected = true, PosX=1, PosY=0.90); |
---|
762 | in HeatToCondenser as power (Brief="Heat supplied to Condenser", Protected = true, PosX=1, PosY=0.034); |
---|
763 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
764 | # Column Connectors |
---|
765 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
766 | ConnectorHeatReboiler as power (Brief="Heat supplied to Reboiler", Hidden=true); |
---|
767 | ConnectorHeatCondenser as power (Brief="Heat supplied to Condenser", Hidden=true); |
---|
768 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Condenser", Hidden=true); |
---|
769 | in ConnectorReboilerLout as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
770 | in ConnectorSplitterOut as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
771 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
772 | # Column products |
---|
773 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
774 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Condenser", PosX=0.66, PosY=0); |
---|
775 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.20); |
---|
776 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=0.67, PosY=1); |
---|
777 | |
---|
778 | EQUATIONS |
---|
779 | |
---|
780 | switch CondenserVapourFlow |
---|
781 | |
---|
782 | case "on": |
---|
783 | CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo *Ah * sqrt(2*(TRAYS(1).OutletVapour.P - |
---|
784 | CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV)); |
---|
785 | when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
786 | |
---|
787 | case "off": |
---|
788 | CONDENSER.InletVapour.F = 0 * 'mol/s'; |
---|
789 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on"; |
---|
790 | |
---|
791 | end |
---|
792 | |
---|
793 | # Condenser Connector Equations |
---|
794 | ConnectorCondenserVout.T = VapourDistillate.T; |
---|
795 | ConnectorCondenserVout.P = VapourDistillate.P; |
---|
796 | ConnectorCondenserVout.F = VapourDistillate.F; |
---|
797 | ConnectorCondenserVout.z = VapourDistillate.z; |
---|
798 | |
---|
799 | # Splitter Connector Equations |
---|
800 | ConnectorSplitterOut.T = LiquidDistillate.T; |
---|
801 | ConnectorSplitterOut.P = LiquidDistillate.P; |
---|
802 | ConnectorSplitterOut.F = LiquidDistillate.F; |
---|
803 | ConnectorSplitterOut.z = LiquidDistillate.z; |
---|
804 | |
---|
805 | # Reboiler Connector Equations |
---|
806 | ConnectorReboilerLout.T = BottomProduct.T; |
---|
807 | ConnectorReboilerLout.P = BottomProduct.P; |
---|
808 | ConnectorReboilerLout.F = BottomProduct.F; |
---|
809 | ConnectorReboilerLout.z = BottomProduct.z; |
---|
810 | |
---|
811 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
812 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
813 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
814 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
815 | |
---|
816 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
817 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
818 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
819 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
820 | |
---|
821 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
822 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
823 | |
---|
824 | HeatToReboiler = ConnectorHeatReboiler; |
---|
825 | HeatToCondenser = ConnectorHeatCondenser; |
---|
826 | |
---|
827 | CONNECTIONS |
---|
828 | #vapor |
---|
829 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
830 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
831 | |
---|
832 | #liquid |
---|
833 | CONDENSER.OutletLiquid to SPLITTER.Inlet; |
---|
834 | SPLITTER.Outlet2 to PUMP.Inlet; |
---|
835 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
836 | TRAYS(NumberOfTrays).OutletLiquid to REBOILER.InletLiquid; |
---|
837 | |
---|
838 | #Connectors |
---|
839 | CONDENSER.OutletVapour to ConnectorCondenserVout; |
---|
840 | SPLITTER.Outlet1 to ConnectorSplitterOut; |
---|
841 | REBOILER.OutletLiquid to ConnectorReboilerLout; |
---|
842 | |
---|
843 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
844 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
845 | |
---|
846 | end |
---|
847 | |
---|
848 | Model Distillation_thermosyphon_subcooling as Section_ColumnBasic |
---|
849 | ATTRIBUTES |
---|
850 | Pallete = true; |
---|
851 | Icon = "icon/DistillationThermosyphonSubcooling"; |
---|
852 | Brief = "Model of a distillation column with steady condenser and steady reboiler."; |
---|
853 | Info = |
---|
854 | "== Specify == |
---|
855 | * the feed stream of each tray (Inlet); |
---|
856 | * the Murphree eficiency for each tray Emv; |
---|
857 | * the pump head; |
---|
858 | * the condenser pressure drop; |
---|
859 | * the heat supllied in top and bottom tanks; |
---|
860 | * the heat supllied in condenser and reboiler; |
---|
861 | * the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product; |
---|
862 | * both top splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
863 | |
---|
864 | == Initial Conditions == |
---|
865 | * the TRAYS temperature (OutletLiquid.T); |
---|
866 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
867 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
868 | |
---|
869 | * the top tank temperature (OutletLiquid.T); |
---|
870 | * the top tank liquid level (Level); |
---|
871 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
872 | |
---|
873 | * the bottom tank temperature (OutletLiquid.T); |
---|
874 | * the bottom tank liquid level (Level); |
---|
875 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
876 | "; |
---|
877 | |
---|
878 | PARAMETERS |
---|
879 | |
---|
880 | CondenserVapourFlow as Switcher(Valid = ["on", "off"], Hidden=true, Default = "on"); |
---|
881 | |
---|
882 | VARIABLES |
---|
883 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
884 | # Column Vapour and Liquid Draw Sides |
---|
885 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
886 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.41,Protected = true); |
---|
887 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.45,Protected = true); |
---|
888 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
889 | # Column Devices |
---|
890 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
891 | CONDENSER as condenserSteady (Brief="steady state condenser with subcooling"); |
---|
892 | ACCUMULATOR_TOP as tank_cylindrical (Brief="vessel drum (layed cilinder)"); |
---|
893 | SPLITTER_TOP as splitter2 (Brief="splitter which separate reflux and distillate"); |
---|
894 | PUMP as pump (Brief="pump in reflux stream"); |
---|
895 | REBOILER as reboilerSteady (Brief="steady state reboiler (thermosyphon)"); |
---|
896 | ACCUMULATOR_BOTTOM as tank (Brief="vessel in the bottom of column"); |
---|
897 | SPLITTER_BOTTOM as splitter2 (Brief="splitter who separate the bottom product and the stream to reboiler"); |
---|
898 | alfaTopo as Real; |
---|
899 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
900 | # Heat Ports |
---|
901 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
902 | in HeatToCondenser as power (Brief="Heat supplied to Condenser",PosX=1, PosY=0.065, Protected=true); |
---|
903 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.87,Protected=true); |
---|
904 | in HeatToBottomAccumulator as power (Brief="Heat supplied to Bottom Accumulator",PosX=0, PosY=0.925,Protected=true); |
---|
905 | in HeatToTopAccumulator as power (Brief="Heat supplied to Top Accumulator", PosX=1, PosY=0.19,Protected=true); |
---|
906 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
907 | # Column Top and Bottom product |
---|
908 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
909 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.24); |
---|
910 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Bottom Splitter", PosX=0.18, PosY=1); |
---|
911 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
912 | # Column Model Connectors |
---|
913 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
914 | in ConnectorSplitterBottom as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
915 | in ConnectorSplitterTop as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
916 | |
---|
917 | ConnectorHeatReboiler as power (Brief="Connector for Heat supplied to Reboiler", Hidden=true); |
---|
918 | ConnectorHeatCondenser as power (Brief="Connector for Heat supplied to Condenser", Hidden=true); |
---|
919 | ConnectorHeatTopAccumulator as power (Brief="Connector for Heat supplied to Top Accumulator", Hidden=true); |
---|
920 | ConnectorHeatBottomAccumulator as power (Brief="Connector for Heat supplied to Bottom Accumulator", Hidden=true); |
---|
921 | |
---|
922 | EQUATIONS |
---|
923 | # Heat Connector Equations |
---|
924 | HeatToCondenser = ConnectorHeatCondenser; |
---|
925 | HeatToReboiler = ConnectorHeatReboiler; |
---|
926 | HeatToBottomAccumulator = ConnectorHeatBottomAccumulator; |
---|
927 | HeatToTopAccumulator = ConnectorHeatTopAccumulator; |
---|
928 | |
---|
929 | # Top Splitter Connector Equations |
---|
930 | ConnectorSplitterTop.T = LiquidDistillate.T; |
---|
931 | ConnectorSplitterTop.P = LiquidDistillate.P; |
---|
932 | ConnectorSplitterTop.F = LiquidDistillate.F; |
---|
933 | ConnectorSplitterTop.z = LiquidDistillate.z; |
---|
934 | |
---|
935 | # Bottom Splitter Connector Equations |
---|
936 | ConnectorSplitterBottom.T = BottomProduct.T; |
---|
937 | ConnectorSplitterBottom.P = BottomProduct.P; |
---|
938 | ConnectorSplitterBottom.F = BottomProduct.F; |
---|
939 | ConnectorSplitterBottom.z = BottomProduct.z; |
---|
940 | |
---|
941 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
942 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
943 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
944 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
945 | |
---|
946 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
947 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
948 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
949 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
950 | |
---|
951 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
952 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
953 | |
---|
954 | switch CondenserVapourFlow |
---|
955 | |
---|
956 | case "on": |
---|
957 | CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo * Ah * sqrt(2*(TRAYS(1).OutletVapour.P - |
---|
958 | CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV)); |
---|
959 | when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
960 | |
---|
961 | case "off": |
---|
962 | CONDENSER.InletVapour.F = 0 * 'mol/s'; |
---|
963 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on"; |
---|
964 | |
---|
965 | end |
---|
966 | |
---|
967 | CONNECTIONS |
---|
968 | #vapor |
---|
969 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
970 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
971 | |
---|
972 | #liquid |
---|
973 | CONDENSER.OutletLiquid to ACCUMULATOR_TOP.Inlet; |
---|
974 | ACCUMULATOR_TOP.Outlet to SPLITTER_TOP.Inlet; |
---|
975 | SPLITTER_TOP.Outlet2 to PUMP.Inlet; |
---|
976 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
977 | TRAYS(NumberOfTrays).OutletLiquid to ACCUMULATOR_BOTTOM.Inlet; |
---|
978 | ACCUMULATOR_BOTTOM.Outlet to SPLITTER_BOTTOM.Inlet; |
---|
979 | SPLITTER_BOTTOM.Outlet2 to REBOILER.InletLiquid; |
---|
980 | |
---|
981 | #Connectors |
---|
982 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
983 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
984 | ConnectorHeatBottomAccumulator to ACCUMULATOR_BOTTOM.InletQ; |
---|
985 | ConnectorHeatTopAccumulator to ACCUMULATOR_TOP.InletQ; |
---|
986 | SPLITTER_TOP.Outlet1 to ConnectorSplitterTop; |
---|
987 | SPLITTER_BOTTOM.Outlet1 to ConnectorSplitterBottom; |
---|
988 | |
---|
989 | end |
---|
990 | |
---|
991 | Model Distillation_thermosyphon_cond as Section_ColumnBasic |
---|
992 | ATTRIBUTES |
---|
993 | Pallete = true; |
---|
994 | Icon = "icon/DistillationThermosyphonCond"; |
---|
995 | Brief = "Model of a distillation column with dynamic condenser and steady reboiler."; |
---|
996 | Info = |
---|
997 | "== Specify == |
---|
998 | * the feed stream of each tray (Inlet); |
---|
999 | * the Murphree eficiency for each tray Emv; |
---|
1000 | * the pump head; |
---|
1001 | * the condenser vapor outlet flow (OutletVapour.F); |
---|
1002 | * the heat supllied in bottom tank; |
---|
1003 | * the heat supllied in condenser and reboiler; |
---|
1004 | * the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product; |
---|
1005 | |
---|
1006 | == Initial Conditions == |
---|
1007 | * the TRAYS temperature (OutletLiquid.T); |
---|
1008 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1009 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1010 | |
---|
1011 | * the condenser temperature (OutletLiquid.T); |
---|
1012 | * the condenser liquid level (Level); |
---|
1013 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
1014 | |
---|
1015 | * the bottom tank temperature (OutletLiquid.T); |
---|
1016 | * the bottom tank liquid level (Level); |
---|
1017 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
1018 | "; |
---|
1019 | |
---|
1020 | PARAMETERS |
---|
1021 | CondenserVapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
1022 | |
---|
1023 | VARIABLES |
---|
1024 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1025 | # Column Vapour and Liquid Draw Sides |
---|
1026 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1027 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.379,Protected = true); |
---|
1028 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.425,Protected = true); |
---|
1029 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1030 | # Column Devices |
---|
1031 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1032 | CONDENSER as condenser (Brief="dynamic condenser without subcooling"); |
---|
1033 | SPLITTER_TOP as splitter2 (Brief="splitter which separate reflux and distillate"); |
---|
1034 | PUMP as pump (Brief="pump in reflux stream"); |
---|
1035 | ACCUMULATOR_BOTTOM as tank (Brief="vessel in the bottom of column"); |
---|
1036 | SPLITTER_BOTTOM as splitter2 (Brief="splitter who separate the bottom product and the stream to reboiler"); |
---|
1037 | REBOILER as reboilerSteady (Brief="steady state reboiler (thermosyphon)"); |
---|
1038 | alfaTopo as Real; |
---|
1039 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1040 | # Heat Ports |
---|
1041 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1042 | in HeatToCondenser as power (Brief="Heat supplied to Condenser",PosX=1, PosY=0.035, Protected=true); |
---|
1043 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.865,Protected=true); |
---|
1044 | in HeatToBottomAccumulator as power (Brief="Heat supplied to Bottom Accumulator",PosX=0, PosY=0.92,Protected=true); |
---|
1045 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1046 | # Column Top and Bottom product |
---|
1047 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1048 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Top Condenser", PosX=0.665, PosY=0); |
---|
1049 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.20); |
---|
1050 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Bottom Splitter", PosX=0.18, PosY=1); |
---|
1051 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1052 | # Column Model Connectors |
---|
1053 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1054 | in ConnectorSplitterBottom as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
1055 | in ConnectorSplitterTop as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
1056 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true); |
---|
1057 | |
---|
1058 | ConnectorHeatReboiler as power (Brief="Connector for Heat supplied to Reboiler", Hidden=true); |
---|
1059 | ConnectorHeatCondenser as power (Brief="Connector for Heat supplied to Condenser", Hidden=true); |
---|
1060 | ConnectorHeatBottomAccumulator as power (Brief="Connector for Heat supplied to Bottom Accumulator", Hidden=true); |
---|
1061 | |
---|
1062 | EQUATIONS |
---|
1063 | # Heat Connector Equations |
---|
1064 | HeatToCondenser = ConnectorHeatCondenser; |
---|
1065 | HeatToReboiler = ConnectorHeatReboiler; |
---|
1066 | HeatToBottomAccumulator = ConnectorHeatBottomAccumulator; |
---|
1067 | |
---|
1068 | # Condenser Connector Equations |
---|
1069 | ConnectorCondenserVout.T = VapourDistillate.T; |
---|
1070 | ConnectorCondenserVout.P = VapourDistillate.P; |
---|
1071 | ConnectorCondenserVout.F = VapourDistillate.F; |
---|
1072 | ConnectorCondenserVout.z = VapourDistillate.z; |
---|
1073 | |
---|
1074 | # Top Splitter Connector Equations |
---|
1075 | ConnectorSplitterTop.T = LiquidDistillate.T; |
---|
1076 | ConnectorSplitterTop.P = LiquidDistillate.P; |
---|
1077 | ConnectorSplitterTop.F = LiquidDistillate.F; |
---|
1078 | ConnectorSplitterTop.z = LiquidDistillate.z; |
---|
1079 | |
---|
1080 | # Bottom Splitter Connector Equations |
---|
1081 | ConnectorSplitterBottom.T = BottomProduct.T; |
---|
1082 | ConnectorSplitterBottom.P = BottomProduct.P; |
---|
1083 | ConnectorSplitterBottom.F = BottomProduct.F; |
---|
1084 | ConnectorSplitterBottom.z = BottomProduct.z; |
---|
1085 | |
---|
1086 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
1087 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
1088 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
1089 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
1090 | |
---|
1091 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
1092 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
1093 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
1094 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
1095 | |
---|
1096 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
1097 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
1098 | |
---|
1099 | switch CondenserVapourFlow |
---|
1100 | case "on": |
---|
1101 | CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo * Ah * sqrt(2*(TRAYS(1).OutletVapour.P - |
---|
1102 | CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV)); |
---|
1103 | when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
1104 | |
---|
1105 | case "off": |
---|
1106 | CONDENSER.InletVapour.F = 0 * 'mol/s'; |
---|
1107 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on"; |
---|
1108 | end |
---|
1109 | |
---|
1110 | CONNECTIONS |
---|
1111 | #vapor |
---|
1112 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
1113 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
1114 | |
---|
1115 | #liquid |
---|
1116 | CONDENSER.OutletLiquid to SPLITTER_TOP.Inlet; |
---|
1117 | SPLITTER_TOP.Outlet2 to PUMP.Inlet; |
---|
1118 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
1119 | TRAYS(NumberOfTrays).OutletLiquid to ACCUMULATOR_BOTTOM.Inlet; |
---|
1120 | ACCUMULATOR_BOTTOM.Outlet to SPLITTER_BOTTOM.Inlet; |
---|
1121 | SPLITTER_BOTTOM.Outlet2 to REBOILER.InletLiquid; |
---|
1122 | |
---|
1123 | #Connectors |
---|
1124 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
1125 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
1126 | ConnectorHeatBottomAccumulator to ACCUMULATOR_BOTTOM.InletQ; |
---|
1127 | CONDENSER.OutletVapour to ConnectorCondenserVout; |
---|
1128 | SPLITTER_TOP.Outlet1 to ConnectorSplitterTop; |
---|
1129 | SPLITTER_BOTTOM.Outlet1 to ConnectorSplitterBottom; |
---|
1130 | |
---|
1131 | end |
---|
1132 | |
---|
1133 | Model Distillation_kettle_subcooling as Section_ColumnBasic |
---|
1134 | |
---|
1135 | ATTRIBUTES |
---|
1136 | Pallete = true; |
---|
1137 | Icon = "icon/DistillationKettleSubcooling"; |
---|
1138 | Brief = "Model of a distillation column with steady condenser and dynamic reboiler."; |
---|
1139 | Info = |
---|
1140 | "== Specify == |
---|
1141 | * the feed stream of each tray (Inlet); |
---|
1142 | * the Murphree eficiency for each tray (Emv); |
---|
1143 | * the pump pressure difference; |
---|
1144 | * the heat supllied in reboiler and condenser; |
---|
1145 | * the heat supllied in the top tank; |
---|
1146 | * the condenser pressure drop; |
---|
1147 | * the reboiler liquid outlet flow (OutletLiquid.F); |
---|
1148 | * both splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
1149 | |
---|
1150 | == Initial Conditions == |
---|
1151 | * the TRAYS temperature (OutletLiquid.T); |
---|
1152 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1153 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1154 | |
---|
1155 | * the top tank temperature (OutletLiquid.T); |
---|
1156 | * the top tank liquid level (Level); |
---|
1157 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
1158 | |
---|
1159 | * the reboiler temperature (OutletLiquid.T); |
---|
1160 | * the reboiler liquid level (Level); |
---|
1161 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
1162 | "; |
---|
1163 | |
---|
1164 | PARAMETERS |
---|
1165 | CondenserVapourFlow as Switcher(Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
1166 | |
---|
1167 | VARIABLES |
---|
1168 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1169 | # Column Vapour and Liquid Draw Sides |
---|
1170 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1171 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.41,Protected = true); |
---|
1172 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.45,Protected = true); |
---|
1173 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1174 | # Column Devices |
---|
1175 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1176 | CONDENSER as condenserSteady (Brief="steady state condenser with subcooling"); |
---|
1177 | ACCUMULATOR as tank_cylindrical (Brief="vessel drum (layed cilinder)"); |
---|
1178 | SPLITTER as splitter2 (Brief="splitter which separate reflux and distillate"); |
---|
1179 | PUMP as pump (Brief="pump in reflux stream"); |
---|
1180 | REBOILER as reboiler (Brief="kettle reboiler"); |
---|
1181 | alfaTopo as Real; |
---|
1182 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1183 | # Heat Ports |
---|
1184 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1185 | in HeatToCondenser as power (Brief="Heat supplied to Condenser", PosX=1, PosY=0.065, Protected=true); |
---|
1186 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.905, Protected=true); |
---|
1187 | in HeatToAccumulator as power (Brief="Heat supplied to Top Vessel", PosX=1, PosY=0.195, Protected=true); |
---|
1188 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1189 | # Column Model Connectors |
---|
1190 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1191 | in ConnectorSplitterOut as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
1192 | in ConnectorReboilerLout as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
1193 | ConnectorHeatReboiler as power (Brief="Connector for Heat supplied to Reboiler", Hidden=true); |
---|
1194 | ConnectorHeatCondenser as power (Brief="Connector for Heat supplied to Condenser", Hidden=true); |
---|
1195 | ConnectorHeatAccumulator as power (Brief="Connector for Heat supplied to TopVessel", Hidden=true); |
---|
1196 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1197 | # Column Top and Bottom product |
---|
1198 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1199 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.24); |
---|
1200 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=0.67, PosY=1); |
---|
1201 | |
---|
1202 | EQUATIONS |
---|
1203 | |
---|
1204 | #Heat Connectors |
---|
1205 | HeatToCondenser = ConnectorHeatCondenser; |
---|
1206 | HeatToReboiler = ConnectorHeatReboiler; |
---|
1207 | HeatToAccumulator = ConnectorHeatAccumulator; |
---|
1208 | |
---|
1209 | # Splitter Connector Equations |
---|
1210 | ConnectorSplitterOut.T = LiquidDistillate.T; |
---|
1211 | ConnectorSplitterOut.P = LiquidDistillate.P; |
---|
1212 | ConnectorSplitterOut.F = LiquidDistillate.F; |
---|
1213 | ConnectorSplitterOut.z = LiquidDistillate.z; |
---|
1214 | |
---|
1215 | # Reboiler Connector Equations |
---|
1216 | ConnectorReboilerLout.T = BottomProduct.T; |
---|
1217 | ConnectorReboilerLout.P = BottomProduct.P; |
---|
1218 | ConnectorReboilerLout.F = BottomProduct.F; |
---|
1219 | ConnectorReboilerLout.z = BottomProduct.z; |
---|
1220 | |
---|
1221 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
1222 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
1223 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
1224 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
1225 | |
---|
1226 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
1227 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
1228 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
1229 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
1230 | |
---|
1231 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
1232 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
1233 | |
---|
1234 | switch CondenserVapourFlow |
---|
1235 | case "on": |
---|
1236 | CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo * Ah * sqrt(2*(TRAYS(1).OutletVapour.P - |
---|
1237 | CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV)); |
---|
1238 | when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
1239 | |
---|
1240 | case "off": |
---|
1241 | CONDENSER.InletVapour.F = 0 * 'mol/s'; |
---|
1242 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on"; |
---|
1243 | end |
---|
1244 | |
---|
1245 | CONNECTIONS |
---|
1246 | #vapor |
---|
1247 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
1248 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
1249 | |
---|
1250 | #liquid |
---|
1251 | CONDENSER.OutletLiquid to ACCUMULATOR.Inlet; |
---|
1252 | ACCUMULATOR.Outlet to SPLITTER.Inlet; |
---|
1253 | SPLITTER.Outlet2 to PUMP.Inlet; |
---|
1254 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
1255 | TRAYS(NumberOfTrays).OutletLiquid to REBOILER.InletLiquid; |
---|
1256 | |
---|
1257 | #Connectors |
---|
1258 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
1259 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
1260 | ConnectorHeatAccumulator to ACCUMULATOR.InletQ; |
---|
1261 | |
---|
1262 | SPLITTER.Outlet1 to ConnectorSplitterOut; |
---|
1263 | REBOILER.OutletLiquid to ConnectorReboilerLout; |
---|
1264 | |
---|
1265 | end |
---|
1266 | |
---|
1267 | Model Rectifier as Section_ColumnBasic |
---|
1268 | |
---|
1269 | ATTRIBUTES |
---|
1270 | Pallete = true; |
---|
1271 | Icon = "icon/RefluxedCond"; |
---|
1272 | Brief = "Model of a rectifier column with dynamic condenser."; |
---|
1273 | Info = |
---|
1274 | "== Specify == |
---|
1275 | * the feed stream of each tray (Inlet); |
---|
1276 | * the Murphree eficiency for each tray Emv; |
---|
1277 | * the InletVapour stream of the bottom tray unless its flow; |
---|
1278 | * the pump pressure difference; |
---|
1279 | * the heat supllied in the condenser; |
---|
1280 | * the condenser vapor outlet flow (OutletVapour.F); |
---|
1281 | * both splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
1282 | |
---|
1283 | == Initial Conditions == |
---|
1284 | * the TRAYS temperature (OutletLiquid.T); |
---|
1285 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1286 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1287 | |
---|
1288 | * the condenser temperature (OutletLiquid.T); |
---|
1289 | * the condenser liquid level (Level); |
---|
1290 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
1291 | "; |
---|
1292 | |
---|
1293 | PARAMETERS |
---|
1294 | CondenserVapourFlow as Switcher(Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
1295 | |
---|
1296 | VARIABLES |
---|
1297 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1298 | # Column Vapour and Liquid Draw Sides |
---|
1299 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1300 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.45,Protected = true); |
---|
1301 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.50,Protected = true); |
---|
1302 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1303 | # Column Devices |
---|
1304 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1305 | CONDENSER as condenser (Brief="dymamic condenser without subcooling"); |
---|
1306 | SPLITTER as splitter2 (Brief="splitter which separate reflux and distillate"); |
---|
1307 | PUMP as pump (Brief="pump in reflux stream"); |
---|
1308 | alfaTopo as Real; |
---|
1309 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1310 | # Column Top product |
---|
1311 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1312 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Top Condenser", PosX=0.66, PosY=0); |
---|
1313 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.24); |
---|
1314 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1315 | # Heat Port |
---|
1316 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1317 | in HeatToCondenser as power (Brief="Heat supplied to Condenser",PosX=1, PosY=0.04, Protected = true); |
---|
1318 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1319 | # Column Bottom Outlets |
---|
1320 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1321 | in VapourInlet as stream (Brief="Vapour Inlet in the section", PosX=0.07, PosY=1); |
---|
1322 | out LiquidOutlet as liquid_stream (Brief="Liquid Outlet in the section", PosX=0.32, PosY=1); |
---|
1323 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1324 | # Column Model Connectors |
---|
1325 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1326 | in ConnectorSplitterOut as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
1327 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true); |
---|
1328 | VapourConnector as stream (Brief="Vapour connection at the middle TRAYS", PosX=0.55, PosY=0,Hidden=true); |
---|
1329 | ConnectorHeatCondenser as power (Brief="Connector for Heat supplied to Condenser", Hidden=true); |
---|
1330 | |
---|
1331 | EQUATIONS |
---|
1332 | |
---|
1333 | switch CondenserVapourFlow |
---|
1334 | |
---|
1335 | case "on": |
---|
1336 | CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo * Ah * sqrt(2*(TRAYS(1).OutletVapour.P - |
---|
1337 | CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV)); |
---|
1338 | when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
1339 | |
---|
1340 | case "off": |
---|
1341 | CONDENSER.InletVapour.F = 0 * 'mol/s'; |
---|
1342 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on"; |
---|
1343 | |
---|
1344 | end |
---|
1345 | |
---|
1346 | HeatToCondenser = ConnectorHeatCondenser; |
---|
1347 | |
---|
1348 | # Condenser Connector Equations |
---|
1349 | ConnectorCondenserVout.T = VapourDistillate.T; |
---|
1350 | ConnectorCondenserVout.P = VapourDistillate.P; |
---|
1351 | ConnectorCondenserVout.F = VapourDistillate.F; |
---|
1352 | ConnectorCondenserVout.z = VapourDistillate.z; |
---|
1353 | |
---|
1354 | # Splitter Connector Equations |
---|
1355 | ConnectorSplitterOut.T = LiquidDistillate.T; |
---|
1356 | ConnectorSplitterOut.P = LiquidDistillate.P; |
---|
1357 | ConnectorSplitterOut.F = LiquidDistillate.F; |
---|
1358 | ConnectorSplitterOut.z = LiquidDistillate.z; |
---|
1359 | |
---|
1360 | LiquidOutlet.F= TRAYS(NumberOfTrays).OutletLiquid.F; |
---|
1361 | LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T; |
---|
1362 | LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P; |
---|
1363 | LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z; |
---|
1364 | |
---|
1365 | VapourConnector.F= VapourInlet.F; |
---|
1366 | VapourConnector.T = VapourInlet.T; |
---|
1367 | VapourConnector.P = VapourInlet.P; |
---|
1368 | VapourConnector.z = VapourInlet.z; |
---|
1369 | VapourConnector.v = VapourInlet.v; |
---|
1370 | VapourConnector.h = VapourInlet.h; |
---|
1371 | |
---|
1372 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
1373 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
1374 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
1375 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
1376 | |
---|
1377 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
1378 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
1379 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
1380 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
1381 | |
---|
1382 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
1383 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
1384 | |
---|
1385 | CONNECTIONS |
---|
1386 | #vapor |
---|
1387 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
1388 | |
---|
1389 | #liquid |
---|
1390 | CONDENSER.OutletLiquid to SPLITTER.Inlet; |
---|
1391 | SPLITTER.Outlet2 to PUMP.Inlet; |
---|
1392 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
1393 | |
---|
1394 | #Connectors |
---|
1395 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
1396 | VapourConnector to TRAYS(NumberOfTrays).InletVapour; |
---|
1397 | SPLITTER.Outlet1 to ConnectorSplitterOut; |
---|
1398 | CONDENSER.OutletVapour to ConnectorCondenserVout; |
---|
1399 | |
---|
1400 | end |
---|
1401 | |
---|
1402 | Model Rectifier_subcooling as Section_ColumnBasic |
---|
1403 | |
---|
1404 | ATTRIBUTES |
---|
1405 | Pallete = true; |
---|
1406 | Icon = "icon/RefluxedSubcooling"; |
---|
1407 | Brief = "Model of a rectifier column with steady condenser."; |
---|
1408 | Info = |
---|
1409 | "== Specify == |
---|
1410 | * the feed stream of each tray (Inlet); |
---|
1411 | * the Murphree eficiency for each tray Emv; |
---|
1412 | * the InletVapour stream of the bottom tray unless its flow; |
---|
1413 | * the pump head; |
---|
1414 | * the condenser pressure drop; |
---|
1415 | * the heat supllied in the top tank; |
---|
1416 | * the heat supllied in condenser; |
---|
1417 | * both top splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
1418 | |
---|
1419 | == Initial Conditions == |
---|
1420 | * the TRAYS temperature (OutletLiquid.T); |
---|
1421 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1422 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1423 | |
---|
1424 | * the top tank temperature (OutletLiquid.T); |
---|
1425 | * the top tank liquid level (Level); |
---|
1426 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
1427 | "; |
---|
1428 | |
---|
1429 | PARAMETERS |
---|
1430 | CondenserVapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
---|
1431 | |
---|
1432 | VARIABLES |
---|
1433 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1434 | # Column Vapour and Liquid Draw Sides |
---|
1435 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1436 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.485,Protected = true); |
---|
1437 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.535,Protected = true); |
---|
1438 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1439 | # Column Devices |
---|
1440 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1441 | CONDENSER as condenserSteady (Brief="steady state condenser with subcooling"); |
---|
1442 | ACCUMULATOR as tank_cylindrical (Brief="vessel drum (layed cilinder)"); |
---|
1443 | SPLITTER as splitter2 (Brief="plitter which separate reflux and distillate"); |
---|
1444 | PUMP as pump (Brief="pump in reflux stream"); |
---|
1445 | alfaTopo as Real; |
---|
1446 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1447 | # Column Bottom outlets |
---|
1448 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1449 | in VapourInlet as stream (Brief="Vapour Inlet in the section", PosX=0.07, PosY=1); |
---|
1450 | out LiquidOutlet as liquid_stream (Brief="Liquid Outlet in the section", PosX=0.32, PosY=1); |
---|
1451 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1452 | # Heat Ports |
---|
1453 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1454 | in HeatToCondenser as power (Brief="Heat supplied to Condenser", PosX=1, PosY=0.070, Protected=true); |
---|
1455 | in HeatToAccumulator as power (Brief="Heat supplied to Top Accumulator", PosX=1, PosY=0.23, Protected=true); |
---|
1456 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1457 | # Column Top Product |
---|
1458 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1459 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.285); |
---|
1460 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1461 | # Column Connectors |
---|
1462 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1463 | in ConnectorSplitterTop as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
1464 | VapourConnector as stream (Brief="Vapour connection at the middle TRAYS", PosX=0.55, PosY=0,Hidden=true); |
---|
1465 | ConnectorHeatCondenser as power (Brief="Connector for Heat supplied to Condenser", Hidden=true); |
---|
1466 | ConnectorHeatAccumulator as power (Brief="Connector for Heat supplied to Top Accumulator", Hidden=true); |
---|
1467 | |
---|
1468 | EQUATIONS |
---|
1469 | #Heat Connectors |
---|
1470 | HeatToCondenser = ConnectorHeatCondenser; |
---|
1471 | HeatToAccumulator = ConnectorHeatAccumulator; |
---|
1472 | |
---|
1473 | LiquidOutlet.F= TRAYS(NumberOfTrays).OutletLiquid.F; |
---|
1474 | LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T; |
---|
1475 | LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P; |
---|
1476 | LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z; |
---|
1477 | |
---|
1478 | VapourConnector.F= VapourInlet.F; |
---|
1479 | VapourConnector.T = VapourInlet.T; |
---|
1480 | VapourConnector.P = VapourInlet.P; |
---|
1481 | VapourConnector.z = VapourInlet.z; |
---|
1482 | VapourConnector.v = VapourInlet.v; |
---|
1483 | VapourConnector.h = VapourInlet.h; |
---|
1484 | |
---|
1485 | # Splitter Connector Equations |
---|
1486 | ConnectorSplitterTop.T = LiquidDistillate.T; |
---|
1487 | ConnectorSplitterTop.P = LiquidDistillate.P; |
---|
1488 | ConnectorSplitterTop.F = LiquidDistillate.F; |
---|
1489 | ConnectorSplitterTop.z = LiquidDistillate.z; |
---|
1490 | |
---|
1491 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
1492 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
1493 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
1494 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
1495 | |
---|
1496 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
1497 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
1498 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
1499 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
1500 | |
---|
1501 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
1502 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
1503 | |
---|
1504 | switch CondenserVapourFlow |
---|
1505 | |
---|
1506 | case "on": |
---|
1507 | CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo *Ah * sqrt(2*(TRAYS(1).OutletVapour.P - |
---|
1508 | CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV)); |
---|
1509 | when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
1510 | |
---|
1511 | case "off": |
---|
1512 | CONDENSER.InletVapour.F = 0 * 'mol/s'; |
---|
1513 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on"; |
---|
1514 | |
---|
1515 | end |
---|
1516 | |
---|
1517 | CONNECTIONS |
---|
1518 | #vapor |
---|
1519 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
1520 | |
---|
1521 | #liquid |
---|
1522 | CONDENSER.OutletLiquid to ACCUMULATOR.Inlet; |
---|
1523 | ACCUMULATOR.Outlet to SPLITTER.Inlet; |
---|
1524 | SPLITTER.Outlet2 to PUMP.Inlet; |
---|
1525 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
1526 | |
---|
1527 | #Connectors |
---|
1528 | VapourConnector to TRAYS(NumberOfTrays).InletVapour; |
---|
1529 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
1530 | SPLITTER.Outlet1 to ConnectorSplitterTop; |
---|
1531 | ConnectorHeatAccumulator to ACCUMULATOR.InletQ; |
---|
1532 | |
---|
1533 | end |
---|
1534 | |
---|
1535 | Model Reboiled_Stripping_kettle as Section_ColumnBasic |
---|
1536 | |
---|
1537 | ATTRIBUTES |
---|
1538 | Pallete = true; |
---|
1539 | Icon = "icon/ReboiledKettle"; |
---|
1540 | Brief = "Model of a reboiled stripping column with dynamic reboiler."; |
---|
1541 | Info = |
---|
1542 | "== Specify == |
---|
1543 | * the feed stream of each tray (Inlet); |
---|
1544 | * the Murphree eficiency for each tray Emv; |
---|
1545 | * the vapour flow leaving the top of the column; |
---|
1546 | * the InletLiquidiquid stream of the top tray; |
---|
1547 | * the heat supllied in the reboiler; |
---|
1548 | * the reboiler liquid outlet flow (OutletLiquid.F); |
---|
1549 | |
---|
1550 | == Initial Conditions == |
---|
1551 | * the TRAYS temperature (OutletLiquid.T); |
---|
1552 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1553 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1554 | |
---|
1555 | * the reboiler temperature (OutletLiquid.T); |
---|
1556 | * the reboiler liquid level (Level); |
---|
1557 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
1558 | "; |
---|
1559 | |
---|
1560 | VARIABLES |
---|
1561 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1562 | # Column Vapour and Liquid Draw Sides |
---|
1563 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1564 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.28,Protected = true); |
---|
1565 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.33,Protected = true); |
---|
1566 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1567 | # Column Devices |
---|
1568 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1569 | REBOILER as reboiler (Brief="Kettle Reboiler"); |
---|
1570 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1571 | # Heat Port |
---|
1572 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1573 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler",PosX=1, PosY=0.865,Protected=true); |
---|
1574 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1575 | # Column Top Outlets |
---|
1576 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1577 | in LiquidInlet as stream (Brief="Liquid Inlet in the section", PosX=0.30, PosY=0); |
---|
1578 | out VapourOutlet as vapour_stream (Brief="Vapour Outlet in the section", PosX=0.07, PosY=0); |
---|
1579 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1580 | # Column Bottom Product |
---|
1581 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1582 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=0.68, PosY=1); |
---|
1583 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1584 | # Column Connectors |
---|
1585 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1586 | in ConnectorReboilerLout as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
1587 | LiquidConnector as stream (Brief="Liquid connection at the middle TRAYS", PosX=0.75, PosY=1,Hidden=true); |
---|
1588 | ConnectorHeatReboiler as power (Brief="Connector for Heat supplied to Reboiler", Hidden=true); |
---|
1589 | |
---|
1590 | CONNECTIONS |
---|
1591 | #vapor |
---|
1592 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
1593 | |
---|
1594 | #liquid |
---|
1595 | TRAYS(NumberOfTrays).OutletLiquid to REBOILER.InletLiquid; |
---|
1596 | |
---|
1597 | #Connectors |
---|
1598 | REBOILER.OutletLiquid to ConnectorReboilerLout; |
---|
1599 | LiquidConnector to TRAYS(1).InletLiquid; |
---|
1600 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
1601 | |
---|
1602 | EQUATIONS |
---|
1603 | #Heat Connectors |
---|
1604 | HeatToReboiler = ConnectorHeatReboiler; |
---|
1605 | |
---|
1606 | LiquidConnector.F= LiquidInlet.F; |
---|
1607 | LiquidConnector.T = LiquidInlet.T; |
---|
1608 | LiquidConnector.P = LiquidInlet.P; |
---|
1609 | LiquidConnector.z = LiquidInlet.z; |
---|
1610 | LiquidConnector.v = LiquidInlet.v; |
---|
1611 | LiquidConnector.h = LiquidInlet.h; |
---|
1612 | |
---|
1613 | VapourOutlet.F= TRAYS(1).OutletVapour.F; |
---|
1614 | VapourOutlet.T = TRAYS(1).OutletVapour.T; |
---|
1615 | VapourOutlet.P = TRAYS(1).OutletVapour.P; |
---|
1616 | VapourOutlet.z = TRAYS(1).OutletVapour.z; |
---|
1617 | |
---|
1618 | # Reboiler Connector Equations |
---|
1619 | ConnectorReboilerLout.T = BottomProduct.T; |
---|
1620 | ConnectorReboilerLout.P = BottomProduct.P; |
---|
1621 | ConnectorReboilerLout.F = BottomProduct.F; |
---|
1622 | ConnectorReboilerLout.z = BottomProduct.z; |
---|
1623 | |
---|
1624 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
1625 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
1626 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
1627 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
1628 | |
---|
1629 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
1630 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
1631 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
1632 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
1633 | |
---|
1634 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
1635 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
1636 | |
---|
1637 | end |
---|
1638 | |
---|
1639 | Model Reboiled_Stripping_thermosyphon as Section_ColumnBasic |
---|
1640 | |
---|
1641 | ATTRIBUTES |
---|
1642 | Pallete = true; |
---|
1643 | Icon = "icon/ReboiledThermosyphon"; |
---|
1644 | Brief = "Model of a reboiled stripping column with steady reboiler."; |
---|
1645 | Info = |
---|
1646 | "== Specify == |
---|
1647 | * the feed stream of each tray (Inlet); |
---|
1648 | * the Murphree eficiency for each tray (Emv); |
---|
1649 | * the vapour flow leaving the top of the column; |
---|
1650 | * the InletLiquidiquid stream of the top tray; |
---|
1651 | * the heat supllied in bottom tank; |
---|
1652 | * the heat supllied in the reboiler; |
---|
1653 | * the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product; |
---|
1654 | |
---|
1655 | == Initial Conditions == |
---|
1656 | * the TRAYS temperature (OutletLiquid.T); |
---|
1657 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1658 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1659 | |
---|
1660 | * the bottom tank temperature (OutletLiquid.T); |
---|
1661 | * the bottom tank liquid level (Level); |
---|
1662 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
1663 | "; |
---|
1664 | |
---|
1665 | VARIABLES |
---|
1666 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1667 | # Column Vapour and Liquid Draw Sides |
---|
1668 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1669 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.28,Protected = true); |
---|
1670 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.33,Protected = true); |
---|
1671 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1672 | # Column Devices |
---|
1673 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1674 | REBOILER as reboilerSteady (Brief="steady state reboiler (thermosyphon)"); |
---|
1675 | SPLITTER as splitter2 (Brief="splitter which separate the bottom product and the stream to reboiler"); |
---|
1676 | ACCUMULATOR as tank (Brief="vessel in the bottom of column"); |
---|
1677 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1678 | # Heat Ports |
---|
1679 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1680 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler",PosX=1, PosY=0.84,Protected=true); |
---|
1681 | in HeatToAccumulator as power (Brief="Heat supplied to Bottom Vessel",PosX=0, PosY=0.91,Protected=true); |
---|
1682 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1683 | # Column Top Outlets |
---|
1684 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1685 | in LiquidInlet as stream (Brief="Liquid Inlet in the section", PosX=0.32, PosY=0); |
---|
1686 | out VapourOutlet as vapour_stream (Brief="Vapour Outlet in the section", PosX=0.07, PosY=0); |
---|
1687 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1688 | # Column Bottom Product |
---|
1689 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1690 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=0.19, PosY=1); |
---|
1691 | LiquidConnector as stream (Brief="Liquid connection at the middle TRAYS", PosX=0.75, PosY=1,Hidden=true); |
---|
1692 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1693 | # Column Connectors |
---|
1694 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1695 | in ConnectorSplitterBottom as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
1696 | ConnectorHeatReboiler as power (Brief="Connector for Heat supplied to Reboiler", Hidden=true); |
---|
1697 | ConnectorHeatAccumulator as power (Brief="Connector for Heat supplied to Bottom Accumulator", Hidden=true); |
---|
1698 | |
---|
1699 | CONNECTIONS |
---|
1700 | #vapor |
---|
1701 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
1702 | |
---|
1703 | #liquid |
---|
1704 | TRAYS(NumberOfTrays).OutletLiquid to ACCUMULATOR.Inlet; |
---|
1705 | ACCUMULATOR.Outlet to SPLITTER.Inlet; |
---|
1706 | SPLITTER.Outlet2 to REBOILER.InletLiquid; |
---|
1707 | |
---|
1708 | #Connectors |
---|
1709 | LiquidConnector to TRAYS(1).InletLiquid; |
---|
1710 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
1711 | ConnectorHeatAccumulator to ACCUMULATOR.InletQ; |
---|
1712 | SPLITTER.Outlet1 to ConnectorSplitterBottom; |
---|
1713 | |
---|
1714 | EQUATIONS |
---|
1715 | #Heat Connectors |
---|
1716 | HeatToReboiler = ConnectorHeatReboiler; |
---|
1717 | HeatToAccumulator = ConnectorHeatAccumulator; |
---|
1718 | |
---|
1719 | ConnectorSplitterBottom.T = BottomProduct.T; |
---|
1720 | ConnectorSplitterBottom.P = BottomProduct.P; |
---|
1721 | ConnectorSplitterBottom.F = BottomProduct.F; |
---|
1722 | ConnectorSplitterBottom.z = BottomProduct.z; |
---|
1723 | |
---|
1724 | LiquidConnector.F= LiquidInlet.F; |
---|
1725 | LiquidConnector.T = LiquidInlet.T; |
---|
1726 | LiquidConnector.P = LiquidInlet.P; |
---|
1727 | LiquidConnector.z = LiquidInlet.z; |
---|
1728 | LiquidConnector.v = LiquidInlet.v; |
---|
1729 | LiquidConnector.h = LiquidInlet.h; |
---|
1730 | |
---|
1731 | VapourOutlet.F= TRAYS(1).OutletVapour.F; |
---|
1732 | VapourOutlet.T = TRAYS(1).OutletVapour.T; |
---|
1733 | VapourOutlet.P = TRAYS(1).OutletVapour.P; |
---|
1734 | VapourOutlet.z = TRAYS(1).OutletVapour.z; |
---|
1735 | |
---|
1736 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
1737 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
1738 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
1739 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
1740 | |
---|
1741 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
1742 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
1743 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
1744 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
1745 | |
---|
1746 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
1747 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
1748 | |
---|
1749 | end |
---|
1750 | |
---|
1751 | Model ReactiveDistillation |
---|
1752 | |
---|
1753 | ATTRIBUTES |
---|
1754 | Pallete = true; |
---|
1755 | Icon = "icon/DistillationReac"; |
---|
1756 | Brief = "Model of a reactive distillation column with dynamic condenser and reboiler."; |
---|
1757 | Info = |
---|
1758 | "== Specify == |
---|
1759 | * the reaction related variables for each tray, condenser and reboiler; |
---|
1760 | * the feed stream of each tray (Inlet); |
---|
1761 | * the Murphree eficiency for each tray Emv; |
---|
1762 | * the pump pressure difference; |
---|
1763 | * the heat supllied in reboiler and condenser; |
---|
1764 | * the condenser vapor outlet flow (OutletVapour.F); |
---|
1765 | * the reboiler liquid outlet flow (OutletLiquid.F); |
---|
1766 | * both splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
1767 | |
---|
1768 | == Initial Conditions == |
---|
1769 | * the TRAYS temperature (OutletLiquid.T); |
---|
1770 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
---|
1771 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray; |
---|
1772 | |
---|
1773 | * the condenser temperature (OutletLiquid.T); |
---|
1774 | * the condenser liquid level (Level); |
---|
1775 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
1776 | |
---|
1777 | * the reboiler temperature (OutletLiquid.T); |
---|
1778 | * the reboiler liquid level (Level); |
---|
1779 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
1780 | "; |
---|
1781 | |
---|
1782 | PARAMETERS |
---|
1783 | outer PP as Plugin (Type="PP"); |
---|
1784 | outer NComp as Integer (Brief="Number of Components"); |
---|
1785 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1786 | # Section Column Feed Tray - Side Streams Location and Numbering |
---|
1787 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1788 | NumberOfTrays as Integer (Brief="Number of TRAYS", Default=2); |
---|
1789 | FeedTrayIndex(NumberOfTrays) as Integer (Brief="Feed Tray Index", Default=0,Hidden=true); |
---|
1790 | LiqSideTrayIndex(NumberOfTrays) as Integer (Brief="Liquid Side Tray Index", Default=0,Hidden=true); |
---|
1791 | VapSideTrayIndex(NumberOfTrays) as Integer (Brief="Vapour Side Tray Index", Default=0,Hidden=true); |
---|
1792 | FeedTrayLocation as Integer (Brief="Feed tray Location", Default=2); |
---|
1793 | LiquidSideStreamLocation as Integer (Brief="Liquid Side Stream Location", Default=2); |
---|
1794 | VapourSideStreamLocation as Integer (Brief="Vapour Side Stream Location", Default=2); |
---|
1795 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1796 | # Section Column Flow Model for Liquid and Vapour |
---|
1797 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1798 | VapourFlow as Switcher (Valid = ["on", "off"], Default = "off",Hidden=true); |
---|
1799 | TrayVapourFlow as Switcher (Valid = ["on", "off"], Default = "off",Hidden=true); |
---|
1800 | TrayLiquidFlow as Switcher (Valid = ["on", "off"], Default = "off",Hidden=true); |
---|
1801 | alfacond as Real; |
---|
1802 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1803 | # Section Column Tray Geometry and Auxiliar Parameters |
---|
1804 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1805 | V as volume (Brief="Total Volume of the tray",Hidden=true); |
---|
1806 | Q as power (Brief="Rate of heat supply",Hidden=true); |
---|
1807 | Ap as area (Brief="Plate area = Atray - Adowncomer",Hidden=true); |
---|
1808 | Ah as area (Brief="Total holes area",Hidden=true); |
---|
1809 | lw as length (Brief="Weir length",Hidden=true); |
---|
1810 | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
---|
1811 | hw as length (Brief="Weir height",Hidden=true); |
---|
1812 | beta as fraction (Brief="Aeration fraction"); |
---|
1813 | alfa as fraction (Brief="Dry pressure drop coefficient"); |
---|
1814 | |
---|
1815 | VolumeOfTray as volume (Brief="Total Volume of the tray"); |
---|
1816 | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
---|
1817 | PlateArea as area (Brief="Plate area = Atray - Adowncomer"); |
---|
1818 | HolesArea as area (Brief="Total holes area"); |
---|
1819 | WeirLength as length (Brief="Weir length"); |
---|
1820 | WeirHeight as length (Brief="Weir height"); |
---|
1821 | |
---|
1822 | stoic(NComp) as Real(Brief="Stoichiometric matrix"); |
---|
1823 | Hr as energy_mol; |
---|
1824 | |
---|
1825 | SET |
---|
1826 | |
---|
1827 | FeedTrayIndex(FeedTrayLocation) =1; |
---|
1828 | VapSideTrayIndex(FeedTrayLocation) =1; |
---|
1829 | LiqSideTrayIndex(FeedTrayLocation) =1; |
---|
1830 | |
---|
1831 | V=VolumeOfTray; |
---|
1832 | Q=HeatSupply; |
---|
1833 | Ap=PlateArea; |
---|
1834 | Ah=HolesArea; |
---|
1835 | lw=WeirLength; |
---|
1836 | hw=WeirHeight ; |
---|
1837 | |
---|
1838 | VARIABLES |
---|
1839 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1840 | # Tray Initialization For the Whole Column Section |
---|
1841 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1842 | INITIALIZATION as InitializeSection (Brief = "Column Model Initialization"); |
---|
1843 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1844 | # Column Feed - Side Stream Flow and Murphree Efficiency |
---|
1845 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1846 | in FeedTray as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
---|
1847 | VapourDrawOffFlow as flow_mol (Brief = "Stream Molar Flow Rate"); |
---|
1848 | LiquidDrawOffFlow as flow_mol (Brief = "Stream Molar Flow Rate"); |
---|
1849 | MurphreeEff as Real (Brief = "Murphree efficiency"); |
---|
1850 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1851 | # Column Vapour and Liquid Draw Sides |
---|
1852 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1853 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.395,Protected = true); |
---|
1854 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.44,Protected = true); |
---|
1855 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1856 | # Heat Ports |
---|
1857 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1858 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.89); |
---|
1859 | in HeatToCondenser as power (Brief="Heat supplied to Condenser", PosX=1, PosY=0.07); |
---|
1860 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1861 | # Column Devices |
---|
1862 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1863 | TRAYS(NumberOfTrays) as trayReac; |
---|
1864 | CONDENSER as condenserReact; |
---|
1865 | REBOILER as reboilerReact; |
---|
1866 | SPLITTER as splitter2; |
---|
1867 | PUMP as pump; |
---|
1868 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1869 | # Column Outlets |
---|
1870 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1871 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Condenser", PosX=0.59, PosY=0); |
---|
1872 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Splitter", PosX=1, PosY=0.23); |
---|
1873 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=0.67, PosY=1); |
---|
1874 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1875 | # Column Connectors |
---|
1876 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1877 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true); |
---|
1878 | in ConnectorSplitterOut as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
1879 | in ConnectorReboilerLout as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
1880 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1881 | # Column Control Ports |
---|
1882 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1883 | out TRI as control_signal (Brief="Temperature of Reboiler Indicator", PosX=1, PosY=0.83); |
---|
1884 | out LRI as control_signal (Brief="Level of Reboiler Indicator", PosX=1, PosY=0.855); |
---|
1885 | out TCI as control_signal (Brief="Temperature of Condenser Indicator", PosX=1, PosY=0.01); |
---|
1886 | out LCI as control_signal (Brief="Level of Condenser Indicator", PosX=1, PosY=0.04); |
---|
1887 | |
---|
1888 | CONNECTIONS |
---|
1889 | #vapor |
---|
1890 | REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour; |
---|
1891 | TRAYS(1).OutletVapour to CONDENSER.InletVapour; |
---|
1892 | TRAYS([2:NumberOfTrays]).OutletVapour to TRAYS([1:NumberOfTrays-1]).InletVapour; |
---|
1893 | |
---|
1894 | #liquid |
---|
1895 | CONDENSER.OutletLiquid to SPLITTER.Inlet; |
---|
1896 | SPLITTER.Outlet2 to PUMP.Inlet; |
---|
1897 | PUMP.Outlet to TRAYS(1).InletLiquid; |
---|
1898 | TRAYS([1:NumberOfTrays-1]).OutletLiquid to TRAYS([2:NumberOfTrays]).InletLiquid; |
---|
1899 | TRAYS(NumberOfTrays).OutletLiquid to REBOILER.InletLiquid; |
---|
1900 | |
---|
1901 | #Connectors |
---|
1902 | CONDENSER.OutletVapour to ConnectorCondenserVout; |
---|
1903 | SPLITTER.Outlet1 to ConnectorSplitterOut; |
---|
1904 | REBOILER.OutletLiquid to ConnectorReboilerLout; |
---|
1905 | |
---|
1906 | INITIAL |
---|
1907 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1908 | # Tray Initialization |
---|
1909 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
1910 | for i in 1:NumberOfTrays do |
---|
1911 | |
---|
1912 | "The initial temperature of the TRAYS" |
---|
1913 | TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1)); |
---|
1914 | |
---|
1915 | "The initial Level of the TRAYS" |
---|
1916 | TRAYS(i).Level = INITIALIZATION.LevelFraction*hw; |
---|
1917 | end |
---|
1918 | |
---|
1919 | for i in 1:NComp-1 do |
---|
1920 | |
---|
1921 | for j in 1:NumberOfTrays do |
---|
1922 | |
---|
1923 | "The initial composition of the TRAYS - Normalized" |
---|
1924 | TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1)); |
---|
1925 | end |
---|
1926 | |
---|
1927 | end |
---|
1928 | |
---|
1929 | EQUATIONS |
---|
1930 | |
---|
1931 | for i in [1:NumberOfTrays] do |
---|
1932 | |
---|
1933 | "Murphree Efficiency" |
---|
1934 | TRAYS(i).OutletVapour.z = MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z; |
---|
1935 | |
---|
1936 | "Energy Holdup" |
---|
1937 | TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*V; |
---|
1938 | |
---|
1939 | "Component Molar Balance" |
---|
1940 | diff(TRAYS(i).M)=TRAYS(i).Inlet.F*TRAYS(i).Inlet.z + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.z + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.z- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.z - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.z- |
---|
1941 | TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.z-TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.z + stoic*TRAYS(i).r3*TRAYS(i).ML*TRAYS(i).vL; |
---|
1942 | |
---|
1943 | "Energy Balance" |
---|
1944 | diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h |
---|
1945 | -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + Q ) + Hr * TRAYS(i).r3 *TRAYS(i). vL*TRAYS(i).ML; |
---|
1946 | |
---|
1947 | "Level of clear liquid over the weir" |
---|
1948 | TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/Ap; |
---|
1949 | |
---|
1950 | "Geometry Constraint" |
---|
1951 | V = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV; |
---|
1952 | |
---|
1953 | end |
---|
1954 | |
---|
1955 | switch VapourFlow |
---|
1956 | case "on": |
---|
1957 | "Pressure Drop through the condenser" |
---|
1958 | CONDENSER.InletVapour.F*TRAYS(1).vV / 'm^2' = |
---|
1959 | sqrt((TRAYS(1).OutletVapour.P - CONDENSER.OutletLiquid.P + 1e-8 * 'atm')/(TRAYS(1).rhoV*alfacond)); |
---|
1960 | when TRAYS(1).OutletVapour.P < CONDENSER.OutletLiquid.P switchto "off"; |
---|
1961 | |
---|
1962 | case "off": |
---|
1963 | "Prato selado" |
---|
1964 | CONDENSER.InletVapour.F = 0.0 * 'mol/s'; |
---|
1965 | when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-3 * 'atm' switchto "on"; |
---|
1966 | end |
---|
1967 | |
---|
1968 | for i in [1:NumberOfTrays] do |
---|
1969 | |
---|
1970 | switch TrayLiquidFlow |
---|
1971 | case "on": |
---|
1972 | "Francis Equation" |
---|
1973 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*lw*((TRAYS(i).Level-(beta*hw)+1e-6*'m')/(beta))^2; |
---|
1974 | when TRAYS(i).Level < (beta * hw) switchto "off"; |
---|
1975 | |
---|
1976 | case "off": |
---|
1977 | "Low level" |
---|
1978 | TRAYS(i).OutletLiquid.F = 0 * 'mol/h'; |
---|
1979 | when TRAYS(i).Level > (beta * hw) + 1e-6*'m' switchto "on"; |
---|
1980 | end |
---|
1981 | |
---|
1982 | switch TrayVapourFlow |
---|
1983 | case "on": |
---|
1984 | TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P - TRAYS(i).Level*g*TRAYS(i).rhoL + 1e-8 * 'atm')/(TRAYS(i).rhoV*alfa))*Ah; |
---|
1985 | when TRAYS(i).InletVapour.P < TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL switchto "off"; |
---|
1986 | |
---|
1987 | case "off": |
---|
1988 | TRAYS(i).InletVapour.F = 0 * 'mol/s'; |
---|
1989 | when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL + 3e-2 * 'atm' switchto "on"; |
---|
1990 | end |
---|
1991 | |
---|
1992 | end |
---|
1993 | |
---|
1994 | # Connecting Trays |
---|
1995 | FeedTray.F*FeedTrayIndex= TRAYS.Inlet.F; |
---|
1996 | FeedTray.T = TRAYS.Inlet.T; |
---|
1997 | FeedTray.P = TRAYS.Inlet.P; |
---|
1998 | FeedTray.z = TRAYS.Inlet.z; |
---|
1999 | FeedTray.v = TRAYS.Inlet.v; |
---|
2000 | FeedTray.h = TRAYS.Inlet.h; |
---|
2001 | |
---|
2002 | HeatToReboiler = REBOILER.InletQ; |
---|
2003 | HeatToCondenser = CONDENSER.InletQ; |
---|
2004 | |
---|
2005 | "Reboiler Temperature indicator" |
---|
2006 | TRI * 'K' = REBOILER.OutletLiquid.T; |
---|
2007 | |
---|
2008 | "Reboiler Level indicator" |
---|
2009 | LRI*REBOILER.V = REBOILER.Level*REBOILER.Across; |
---|
2010 | |
---|
2011 | "Condenser Temperature indicator" |
---|
2012 | TCI * 'K' = CONDENSER.OutletLiquid.T; |
---|
2013 | |
---|
2014 | "Condenser Level indicator" |
---|
2015 | LCI*CONDENSER.V = CONDENSER.Level*CONDENSER.Across; |
---|
2016 | |
---|
2017 | # Condenser Connector Equations |
---|
2018 | ConnectorCondenserVout.T = VapourDistillate.T; |
---|
2019 | ConnectorCondenserVout.P = VapourDistillate.P; |
---|
2020 | ConnectorCondenserVout.F = VapourDistillate.F; |
---|
2021 | ConnectorCondenserVout.z = VapourDistillate.z; |
---|
2022 | |
---|
2023 | # Splitter Connector Equations |
---|
2024 | ConnectorSplitterOut.T = LiquidDistillate.T; |
---|
2025 | ConnectorSplitterOut.P = LiquidDistillate.P; |
---|
2026 | ConnectorSplitterOut.F = LiquidDistillate.F; |
---|
2027 | ConnectorSplitterOut.z = LiquidDistillate.z; |
---|
2028 | |
---|
2029 | # Reboiler Connector Equations |
---|
2030 | ConnectorReboilerLout.T = BottomProduct.T; |
---|
2031 | ConnectorReboilerLout.P = BottomProduct.P; |
---|
2032 | ConnectorReboilerLout.F = BottomProduct.F; |
---|
2033 | ConnectorReboilerLout.z = BottomProduct.z; |
---|
2034 | |
---|
2035 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
---|
2036 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
---|
2037 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
---|
2038 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
---|
2039 | |
---|
2040 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
---|
2041 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
---|
2042 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
---|
2043 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
---|
2044 | |
---|
2045 | VapourDrawOffFlow = VapourDrawOff.F; |
---|
2046 | LiquidDrawOffFlow = LiquidDrawOff.F; |
---|
2047 | |
---|
2048 | end |
---|
2049 | |
---|
2050 | Model Packed_Section_ColumnBasic |
---|
2051 | ATTRIBUTES |
---|
2052 | Pallete = false; |
---|
2053 | Icon = "icon/PackedSectionColumn"; |
---|
2054 | Brief = "Model of a packed column section."; |
---|
2055 | Info = |
---|
2056 | "== Model of a packed column section containing == |
---|
2057 | * NStages theoretical stages. |
---|
2058 | |
---|
2059 | == Specify == |
---|
2060 | * the feed stream of each tray (Inlet); |
---|
2061 | * the InletLiquid stream of the top tray; |
---|
2062 | * the InletVapour stream of the bottom tray; |
---|
2063 | * the total pressure drop (dP) of the section. |
---|
2064 | |
---|
2065 | == Initial Conditions == |
---|
2066 | * the stages temperature (OutletLiquid.T); |
---|
2067 | * the stages liquid holdup; |
---|
2068 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
---|
2069 | "; |
---|
2070 | |
---|
2071 | PARAMETERS |
---|
2072 | |
---|
2073 | outer PP as Plugin(Brief = "External Physical Properties", Type="PP"); |
---|
2074 | outer NComp as Integer; |
---|
2075 | |
---|
2076 | NumberOfStages as Integer (Brief="Number of Stages", Default=3); |
---|
2077 | FeedStageIndex(NumberOfStages) as Integer (Brief="Number of Stages", Default=0,Hidden=true); |
---|
2078 | FeedStageLocation as Integer (Brief="Feed Stage Location", Default=2); |
---|
2079 | |
---|
2080 | PackingHeight as length (Brief="Height of packing"); |
---|
2081 | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
---|
2082 | ColumnDiameter as length (Brief="Column diameter"); |
---|
2083 | VoidFraction as Real (Brief="Void fraction of packing, m^3/m^3"); |
---|
2084 | ResistanceCoeff as positive (Brief="Resistance coefficient on the liquid load", Default=1); |
---|
2085 | AreaPerPackingVol as Real (Brief="surface area per packing volume", Unit='m^2/m^3'); |
---|
2086 | |
---|
2087 | V as volume (Brief="Total Volume of the tray",Hidden=true); |
---|
2088 | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
---|
2089 | hs as length (Brief="Height of the packing stage",Hidden=true); |
---|
2090 | ColumnArea as area (Brief="Column Sectional Cross Area",Hidden=true); |
---|
2091 | |
---|
2092 | VARIABLES |
---|
2093 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2094 | # Stages Initialization For the Whole Column Section |
---|
2095 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2096 | INITIALIZATION as InitializeStage (Brief = "Column Model Initialization"); |
---|
2097 | in FeedStage as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
---|
2098 | |
---|
2099 | STAGES(NumberOfStages) as packedStage; |
---|
2100 | PressureDrop as pressure; |
---|
2101 | |
---|
2102 | SET |
---|
2103 | FeedStageIndex(FeedStageLocation) =1; |
---|
2104 | |
---|
2105 | ColumnArea = ColumnDiameter^2*3.14159*0.25; |
---|
2106 | hs =PackingHeight/NumberOfStages; |
---|
2107 | V = hs * ColumnArea; |
---|
2108 | |
---|
2109 | CONNECTIONS |
---|
2110 | |
---|
2111 | STAGES([2:NumberOfStages]).OutletVapour to STAGES([1:NumberOfStages-1]).InletVapour; |
---|
2112 | STAGES([1:NumberOfStages-1]).OutletLiquid to STAGES([2:NumberOfStages]).InletLiquid; |
---|
2113 | |
---|
2114 | EQUATIONS |
---|
2115 | # Connecting STAGES |
---|
2116 | FeedStage.F*FeedStageIndex= STAGES.Inlet.F; |
---|
2117 | FeedStage.T = STAGES.Inlet.T; |
---|
2118 | FeedStage.P = STAGES.Inlet.P; |
---|
2119 | FeedStage.z = STAGES.Inlet.z; |
---|
2120 | FeedStage.v = STAGES.Inlet.v; |
---|
2121 | FeedStage.h = STAGES.Inlet.h; |
---|
2122 | |
---|
2123 | STAGES.deltaP = PressureDrop/NumberOfStages; |
---|
2124 | |
---|
2125 | for i in [1:NumberOfStages] do |
---|
2126 | |
---|
2127 | "Energy Balance" |
---|
2128 | diff(STAGES(i).E) = ( STAGES(i).Inlet.F*STAGES(i).Inlet.h + STAGES(i).InletLiquid.F*STAGES(i).InletLiquid.h + STAGES(i).InletVapour.F*STAGES(i).InletVapour.h- STAGES(i).OutletLiquid.F*STAGES(i).OutletLiquid.h |
---|
2129 | - STAGES(i).OutletVapour.F*STAGES(i).OutletVapour.h + HeatSupply ); |
---|
2130 | |
---|
2131 | "Energy Holdup" |
---|
2132 | STAGES(i).E = STAGES(i).ML*STAGES(i).OutletLiquid.h + STAGES(i).MV*STAGES(i).OutletVapour.h - STAGES(i).OutletLiquid.P*V; |
---|
2133 | |
---|
2134 | "Geometry Constraint" |
---|
2135 | V*VoidFraction= STAGES(i).ML*STAGES(i).vL + STAGES(i).MV*STAGES(i).vV; |
---|
2136 | |
---|
2137 | "Volume flow rate of vapor, m^3/m^2/s" |
---|
2138 | STAGES(i).uV * ((ColumnArea)*VoidFraction - STAGES(i).Al) = STAGES(i).OutletVapour.F * STAGES(i).vV; |
---|
2139 | |
---|
2140 | "Liquid holdup" |
---|
2141 | STAGES(i).hl = STAGES(i).ML*STAGES(i).vL/V/VoidFraction; |
---|
2142 | |
---|
2143 | "Particle diameter" |
---|
2144 | STAGES(i).dp = 6 * (1-VoidFraction)/AreaPerPackingVol; |
---|
2145 | |
---|
2146 | "Wall Factor" |
---|
2147 | STAGES(i).invK = (1 + (2*STAGES(i).dp/(3*ColumnDiameter*(1-VoidFraction)))); |
---|
2148 | |
---|
2149 | "Reynolds number of the vapor stream" |
---|
2150 | STAGES(i).Rev*STAGES(i).invK = STAGES(i).dp*STAGES(i).uV*STAGES(i).rhoV / (STAGES(i).miV*(1-VoidFraction)); |
---|
2151 | |
---|
2152 | "Pressure drop and Vapor flow" |
---|
2153 | STAGES(i).deltaP/hs = ResistanceCoeff*AreaPerPackingVol*STAGES(i).uV^2*STAGES(i).rhoV*STAGES(i).invK / (2*(VoidFraction-STAGES(i).hl)^3); |
---|
2154 | |
---|
2155 | "Liquid holdup" |
---|
2156 | STAGES(i).hl = (12*STAGES(i).miL*AreaPerPackingVol^2*STAGES(i).uL/STAGES(i).rhoL/g)^1/3; |
---|
2157 | |
---|
2158 | "Area occupied by the liquid" |
---|
2159 | STAGES(i).Al = STAGES(i).ML*STAGES(i).vL/hs; |
---|
2160 | |
---|
2161 | end |
---|
2162 | |
---|
2163 | INITIAL |
---|
2164 | |
---|
2165 | for i in 1:NumberOfStages do |
---|
2166 | |
---|
2167 | "The initial temperature of the STAGES" |
---|
2168 | STAGES(i).OutletLiquid.T = INITIALIZATION.TopStageTemperature+(INITIALIZATION.BottomStageTemperature-INITIALIZATION.TopStageTemperature)*((i-1)/(NumberOfStages-1)); |
---|
2169 | |
---|
2170 | "The Liquid Holdup of the STAGES" |
---|
2171 | STAGES(i).ML = INITIALIZATION.LiquidMolarHoldup; |
---|
2172 | |
---|
2173 | end |
---|
2174 | |
---|
2175 | for i in 1:NComp-1 do |
---|
2176 | |
---|
2177 | for j in 1:NumberOfStages do |
---|
2178 | |
---|
2179 | "The initial composition of the TRAYS" |
---|
2180 | STAGES(j).OutletLiquid.z(i) = INITIALIZATION.TopStageComposition(i)/sum(INITIALIZATION.TopStageComposition) +(INITIALIZATION.BottomStageComposition(i)/sum(INITIALIZATION.BottomStageComposition)-INITIALIZATION.TopStageComposition(i)/sum(INITIALIZATION.TopStageComposition) )*((j-1)/(NumberOfStages-1)); |
---|
2181 | |
---|
2182 | end |
---|
2183 | |
---|
2184 | end |
---|
2185 | |
---|
2186 | end |
---|
2187 | |
---|
2188 | Model Packed_Section_Column as Packed_Section_ColumnBasic |
---|
2189 | |
---|
2190 | ATTRIBUTES |
---|
2191 | Pallete = true; |
---|
2192 | Icon = "icon/PackedSectionColumn"; |
---|
2193 | Brief = "Model of a packed column section."; |
---|
2194 | Info = |
---|
2195 | "== Model of a packed column section containing == |
---|
2196 | * NStages theoretical stages. |
---|
2197 | |
---|
2198 | == Specify == |
---|
2199 | * the feed stream of each tray (Inlet); |
---|
2200 | * the InletLiquid stream of the top tray; |
---|
2201 | * the InletVapour stream of the bottom tray; |
---|
2202 | * the total pressure drop (dP) of the section. |
---|
2203 | |
---|
2204 | == Initial Conditions == |
---|
2205 | * the stages temperature (OutletLiquid.T); |
---|
2206 | * the stages liquid holdup; |
---|
2207 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
---|
2208 | "; |
---|
2209 | |
---|
2210 | VARIABLES |
---|
2211 | |
---|
2212 | in LiquidInlet as stream (Brief="Liquid Inlet in the section", PosX=0.70, PosY=0); |
---|
2213 | out VapourOutlet as vapour_stream (Brief="Vapour Outlet in the section", PosX=0.30, PosY=0); |
---|
2214 | |
---|
2215 | in VapourInlet as stream (Brief="Vapour Inlet in the section", PosX=0.30, PosY=1); |
---|
2216 | out LiquidOutlet as liquid_stream (Brief="Liquid Outlet in the section", PosX=0.70, PosY=1); |
---|
2217 | |
---|
2218 | LiquidConnector as stream (Brief="Liquid connection at the middle STAGES", PosX=0.75, PosY=1,Hidden=true); |
---|
2219 | VapourConnector as stream (Brief="Vapour connection at the middle STAGES", PosX=0.55, PosY=0,Hidden=true); |
---|
2220 | |
---|
2221 | CONNECTIONS |
---|
2222 | |
---|
2223 | LiquidConnector to STAGES(1).InletLiquid; |
---|
2224 | VapourConnector to STAGES(NumberOfStages).InletVapour; |
---|
2225 | |
---|
2226 | EQUATIONS |
---|
2227 | |
---|
2228 | LiquidConnector.F= LiquidInlet.F; |
---|
2229 | LiquidConnector.T = LiquidInlet.T; |
---|
2230 | LiquidConnector.P = LiquidInlet.P; |
---|
2231 | LiquidConnector.z = LiquidInlet.z; |
---|
2232 | LiquidConnector.v = LiquidInlet.v; |
---|
2233 | LiquidConnector.h = LiquidInlet.h; |
---|
2234 | |
---|
2235 | VapourConnector.F= VapourInlet.F; |
---|
2236 | VapourConnector.T = VapourInlet.T; |
---|
2237 | VapourConnector.P = VapourInlet.P; |
---|
2238 | VapourConnector.z = VapourInlet.z; |
---|
2239 | VapourConnector.v = VapourInlet.v; |
---|
2240 | VapourConnector.h = VapourInlet.h; |
---|
2241 | |
---|
2242 | LiquidOutlet.F= STAGES(NumberOfStages).OutletLiquid.F; |
---|
2243 | LiquidOutlet.T = STAGES(NumberOfStages).OutletLiquid.T; |
---|
2244 | LiquidOutlet.P = STAGES(NumberOfStages).OutletLiquid.P; |
---|
2245 | LiquidOutlet.z = STAGES(NumberOfStages).OutletLiquid.z; |
---|
2246 | |
---|
2247 | VapourOutlet.F= STAGES(1).OutletVapour.F; |
---|
2248 | VapourOutlet.T = STAGES(1).OutletVapour.T; |
---|
2249 | VapourOutlet.P = STAGES(1).OutletVapour.P; |
---|
2250 | VapourOutlet.z = STAGES(1).OutletVapour.z; |
---|
2251 | |
---|
2252 | end |
---|
2253 | |
---|
2254 | Model PackedDistillation_kettle_cond as Packed_Section_ColumnBasic |
---|
2255 | ATTRIBUTES |
---|
2256 | Pallete = true; |
---|
2257 | Icon = "icon/PackedDistillationKettleCond"; |
---|
2258 | Brief = "Model of a distillation column with dynamic condenser and dynamic reboiler."; |
---|
2259 | Info = |
---|
2260 | "== Specify == |
---|
2261 | * the feed stream of each tray (Inlet); |
---|
2262 | * the pump pressure difference; |
---|
2263 | * the total pressure drop (dP) of the packing; |
---|
2264 | * the heat supllied in reboiler and condenser; |
---|
2265 | * the condenser vapor outlet flow (OutletVapour.F); |
---|
2266 | * the reboiler liquid outlet flow (OutletLiquid.F); |
---|
2267 | * both splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
---|
2268 | |
---|
2269 | == Initial Conditions == |
---|
2270 | * the stages temperature (OutletLiquid.T); |
---|
2271 | * the stages initial molar holdup; |
---|
2272 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each stage; |
---|
2273 | |
---|
2274 | * the condenser temperature (OutletLiquid.T); |
---|
2275 | * the condenser liquid level (Level); |
---|
2276 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions; |
---|
2277 | |
---|
2278 | * the reboiler temperature (OutletLiquid.T); |
---|
2279 | * the reboiler liquid level (Level); |
---|
2280 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
---|
2281 | "; |
---|
2282 | |
---|
2283 | PARAMETERS |
---|
2284 | |
---|
2285 | VapourFlow as Switcher (Valid = ["on", "off"], Hidden = true ,Default = "on"); |
---|
2286 | |
---|
2287 | VARIABLES |
---|
2288 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2289 | # Column Devices |
---|
2290 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2291 | CONDENSER as condenser (Brief="dymamic condenser"); |
---|
2292 | REBOILER as reboiler (Brief="kettle reboiler"); |
---|
2293 | SPLITTER as splitter2 (Brief="splitter which separate reflux and distillate"); |
---|
2294 | PUMP as pump (Brief="pump in reflux stream"); |
---|
2295 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2296 | # Heat Ports |
---|
2297 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2298 | in HeatToReboiler as power (Brief="Heat supplied to Reboiler",Protected = true, PosX=1, PosY=0.885); |
---|
2299 | in HeatToCondenser as power (Brief="Heat supplied to Condenser", Protected = true, PosX=1, PosY=0.034); |
---|
2300 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2301 | # Column Products |
---|
2302 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2303 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Top Condenser", PosX=0.66, PosY=0); |
---|
2304 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.20); |
---|
2305 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=0.68, PosY=1); |
---|
2306 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2307 | # Column Connectors |
---|
2308 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
---|
2309 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true); |
---|
2310 | in ConnectorSplitterOut as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
---|
2311 | in ConnectorReboilerLout as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
---|
2312 | ConnectorHeatReboiler as power (Brief="Heat supplied to Reboiler", Hidden=true); |
---|
2313 | ConnectorHeatCondenser as power (Brief="Heat supplied to Condenser", Hidden=true); |
---|
2314 | |
---|
2315 | CONNECTIONS |
---|
2316 | |
---|
2317 | #vapor |
---|
2318 | REBOILER.OutletVapour to STAGES(NumberOfStages).InletVapour; |
---|
2319 | STAGES(1).OutletVapour to CONDENSER.InletVapour; |
---|
2320 | |
---|
2321 | #liquid |
---|
2322 | CONDENSER.OutletLiquid to SPLITTER.Inlet; |
---|
2323 | SPLITTER.Outlet2 to PUMP.Inlet; |
---|
2324 | PUMP.Outlet to STAGES(1).InletLiquid; |
---|
2325 | STAGES(NumberOfStages).OutletLiquid to REBOILER.InletLiquid; |
---|
2326 | |
---|
2327 | #Connectors |
---|
2328 | ConnectorHeatReboiler to REBOILER.InletQ; |
---|
2329 | ConnectorHeatCondenser to CONDENSER.InletQ; |
---|
2330 | |
---|
2331 | CONDENSER.OutletVapour to ConnectorCondenserVout; |
---|
2332 | SPLITTER.Outlet1 to ConnectorSplitterOut; |
---|
2333 | REBOILER.OutletLiquid to ConnectorReboilerLout; |
---|
2334 | |
---|
2335 | EQUATIONS |
---|
2336 | HeatToReboiler = ConnectorHeatReboiler; |
---|
2337 | HeatToCondenser = ConnectorHeatCondenser; |
---|
2338 | |
---|
2339 | # Condenser Connector Equations |
---|
2340 | ConnectorCondenserVout.T = VapourDistillate.T; |
---|
2341 | ConnectorCondenserVout.P = VapourDistillate.P; |
---|
2342 | ConnectorCondenserVout.F = VapourDistillate.F; |
---|
2343 | ConnectorCondenserVout.z = VapourDistillate.z; |
---|
2344 | |
---|
2345 | # Splitter Connector Equations |
---|
2346 | ConnectorSplitterOut.T = LiquidDistillate.T; |
---|
2347 | ConnectorSplitterOut.P = LiquidDistillate.P; |
---|
2348 | ConnectorSplitterOut.F = LiquidDistillate.F; |
---|
2349 | ConnectorSplitterOut.z = LiquidDistillate.z; |
---|
2350 | |
---|
2351 | # Reboiler Connector Equations |
---|
2352 | ConnectorReboilerLout.T = BottomProduct.T; |
---|
2353 | ConnectorReboilerLout.P = BottomProduct.P; |
---|
2354 | ConnectorReboilerLout.F = BottomProduct.F; |
---|
2355 | ConnectorReboilerLout.z = BottomProduct.z; |
---|
2356 | |
---|
2357 | switch VapourFlow |
---|
2358 | case "on": |
---|
2359 | STAGES(NumberOfStages).InletVapour.F*STAGES(NumberOfStages).vV = sqrt((REBOILER.OutletVapour.P - STAGES(NumberOfStages).OutletVapour.P)/ |
---|
2360 | (STAGES(NumberOfStages).rhoV*ResistanceCoeff*20))*(ColumnArea*VoidFraction - STAGES(NumberOfStages).Al); |
---|
2361 | when STAGES(NumberOfStages).InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
---|
2362 | |
---|
2363 | case "off": |
---|
2364 | STAGES(NumberOfStages).InletVapour.F = 0 * 'mol/s'; |
---|
2365 | when REBOILER.OutletVapour.P > STAGES(NumberOfStages).OutletVapour.P + 1e-1 * 'atm' switchto "on"; |
---|
2366 | end |
---|
2367 | |
---|
2368 | end |
---|
2369 | |
---|