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 | * Model of basic streams |
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17 | *---------------------------------------------------------------------- |
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18 | * Author: Paula B. Staudt and Rafael de P. Soares |
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19 | * $Id: streams.mso 125 2007-01-22 19:57:16Z rafael $ |
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20 | *---------------------------------------------------------------------*# |
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21 | |
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22 | using "types"; |
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23 | |
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24 | Model stream |
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25 | ATTRIBUTES |
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26 | Pallete = false; |
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27 | Brief = "General Material Stream"; |
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28 | Info = |
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29 | "This is the basic building block for the EML models. |
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30 | Every model should have input and output streams derived |
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31 | from this model."; |
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32 | |
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33 | PARAMETERS |
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34 | outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); |
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35 | |
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36 | VARIABLES |
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37 | F as flow_mol; |
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38 | T as temperature; |
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39 | P as pressure; |
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40 | z(NComp) as fraction(Brief = "Overall Molar Fraction"); |
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41 | h as enth_mol; |
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42 | v as fraction(Brief = "Vapourisation fraction"); |
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43 | end |
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44 | |
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45 | Model liquid_stream as stream |
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46 | ATTRIBUTES |
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47 | Pallete = false; |
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48 | Brief = "Liquid Material Stream"; |
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49 | Info = |
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50 | "Model for liquid material streams. |
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51 | This model should be used only when the phase of the stream |
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52 | is known ''a priori''."; |
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53 | |
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54 | PARAMETERS |
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55 | outer PP as Plugin(Brief = "External Physical Properties", Type="PP"); |
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56 | |
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57 | EQUATIONS |
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58 | "Liquid Enthalpy" |
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59 | h = PP.LiquidEnthalpy(T, P, z); |
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60 | "Liquid stream" |
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61 | v = 0; |
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62 | end |
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63 | |
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64 | Model vapour_stream as stream |
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65 | ATTRIBUTES |
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66 | Pallete = false; |
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67 | Brief = "Vapour Material Stream"; |
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68 | Info = |
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69 | "Model for vapour material streams. |
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70 | This model should be used only when the phase of the stream |
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71 | is known ''a priori''."; |
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72 | |
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73 | PARAMETERS |
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74 | outer PP as Plugin(Brief = "External Physical Properties", Type="PP"); |
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75 | |
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76 | EQUATIONS |
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77 | "Vapour Enthalpy" |
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78 | h = PP.VapourEnthalpy(T, P, z); |
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79 | "Vapour stream" |
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80 | v = 1; |
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81 | end |
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82 | |
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83 | Model streamPH as stream |
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84 | PARAMETERS |
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85 | outer PP as Plugin(Brief = "External Physical Properties", Type="PP"); |
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86 | outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); |
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87 | |
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88 | VARIABLES |
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89 | x(NComp) as fraction(Brief = "Liquid Molar Fraction"); |
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90 | y(NComp) as fraction(Brief = "Vapour Molar Fraction"); |
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91 | |
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92 | EQUATIONS |
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93 | "Flash Calculation" |
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94 | [v, x, y] = PP.FlashPH(P, h, z); |
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95 | "Enthalpy" |
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96 | h = (1-v)*PP.LiquidEnthalpy(T, P, x) + |
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97 | v*PP.VapourEnthalpy(T, P, y); |
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98 | end |
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99 | |
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100 | Model source |
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101 | ATTRIBUTES |
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102 | Info = |
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103 | "Material stream source. |
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104 | This model should be used for boundary streams. |
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105 | Usually these streams are known and come from another process |
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106 | units."; |
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107 | |
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108 | PARAMETERS |
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109 | outer PP as Plugin(Brief = "External Physical Properties", Type="PP"); |
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110 | outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); |
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111 | |
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112 | VARIABLES |
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113 | out Outlet as stream; |
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114 | x(NComp) as fraction(Brief = "Liquid Molar Fraction"); |
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115 | y(NComp) as fraction(Brief = "Vapour Molar Fraction"); |
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116 | hl as enth_mol; |
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117 | hv as enth_mol; |
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118 | |
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119 | EQUATIONS |
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120 | "Flash Calculation" |
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121 | [Outlet.v, x, y] = PP.Flash(Outlet.T, Outlet.P, Outlet.z); |
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122 | "Overall Enthalpy" |
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123 | Outlet.h = (1-Outlet.v)*PP.LiquidEnthalpy(Outlet.T, Outlet.P, x) + |
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124 | Outlet.v*PP.VapourEnthalpy(Outlet.T, Outlet.P, y); |
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125 | |
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126 | hl = PP.LiquidEnthalpy(Outlet.T, Outlet.P, x); |
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127 | hv = PP.VapourEnthalpy(Outlet.T, Outlet.P, y); |
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128 | end |
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129 | |
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130 | Model sink |
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131 | ATTRIBUTES |
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132 | Info = |
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133 | "Material stream sink. |
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134 | This model should be used for boundary streams."; |
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135 | |
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136 | PARAMETERS |
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137 | outer PP as Plugin(Brief = "External Physical Properties", Type="PP"); |
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138 | outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); |
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139 | |
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140 | VARIABLES |
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141 | in Inlet as stream; |
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142 | v as fraction; |
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143 | x(NComp) as fraction(Brief = "Liquid Molar Fraction"); |
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144 | y(NComp) as fraction(Brief = "Vapour Molar Fraction"); |
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145 | |
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146 | EQUATIONS |
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147 | "Flash Calculation" |
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148 | [v, x, y] = PP.FlashPH(Inlet.P, Inlet.h, Inlet.z); |
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149 | end |
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