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 | * Sample file for column model |
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17 | *-------------------------------------------------------------------- |
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18 | * |
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19 | * This sample file needs VRTherm DEMO(www.vrtech.com.br) to run |
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20 | * SectionColumn_Test and needs VRTherm full to run the distillation |
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21 | * column flowsheet. |
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22 | * |
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23 | *---------------------------------------------------------------------- |
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24 | * Author: Paula B. Staudt |
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25 | * $Id: sample_column.mso 580 2008-07-26 19:34:58Z bicca $ |
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26 | *--------------------------------------------------------------------*# |
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27 | |
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28 | using "stage_separators/column"; |
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29 | using "controllers/PIDIncr"; |
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30 | |
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31 | # column section with 2 trays |
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32 | FlowSheet SectionColumn_Test_with2tray |
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33 | PARAMETERS |
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34 | PP as Plugin(Brief="Physical Properties", |
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35 | Type="PP", |
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36 | Components = [ "isobutane", "benzene"], |
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37 | LiquidModel = "PR", |
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38 | VapourModel = "PR" |
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39 | ); |
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40 | NComp as Integer; |
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41 | |
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42 | SET |
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43 | NComp = PP.NumberOfComponents; |
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44 | |
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45 | DEVICES |
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46 | sec as Section_Column; |
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47 | feed as liquid_stream; |
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48 | reb as vapour_stream; |
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49 | cond as liquid_stream; |
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50 | zero as stream; |
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51 | |
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52 | CONNECTIONS |
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53 | feed to sec.trays(2).Inlet; |
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54 | zero to sec.trays(1).Inlet; |
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55 | reb to sec.trays(2).InletV; |
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56 | cond to sec.trays(1).InletL; |
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57 | |
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58 | SPECIFY |
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59 | feed.F = 113.4 * 'kmol/h'; |
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60 | feed.T = 291 * 'K'; |
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61 | feed.P = 168.3 * 'kPa'; |
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62 | feed.z = [0.5, 0.5]; |
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63 | |
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64 | zero.F = 0 * 'kmol/h'; |
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65 | zero.T = 300 * 'K'; |
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66 | zero.P = 1 * 'atm'; |
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67 | zero.z = [0.5, 0.5]; |
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68 | zero.v = 0; |
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69 | zero.h = 0 * 'J/mol'; |
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70 | |
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71 | cond.F = 68 * 'kmol/h'; |
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72 | cond.P = 150 * 'kPa'; |
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73 | cond.T = 281.75 * 'K'; |
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74 | cond.z = [0.6664, 0.3336]; |
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75 | |
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76 | reb.P = 185 * 'kPa'; |
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77 | reb.T = 328.12 * 'K'; |
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78 | reb.z = [0.001848, 0.9982]; |
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79 | |
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80 | sec.trays.Emv = 1; |
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81 | sec.trays(1).OutletV.F = 150 * 'kmol/h'; |
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82 | |
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83 | SET |
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84 | sec.NTrays = 2; |
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85 | #COLUMN |
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86 | sec.trays.V = 4 * 'ft^3'; |
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87 | sec.trays.Ah = 0.394 * 'ft^2'; |
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88 | sec.trays.lw = 20.94 * 'in'; |
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89 | sec.trays.hw = 0.125 * 'ft'; |
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90 | sec.trays.Q = 0 * 'kW'; |
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91 | sec.trays.beta = 0.6; |
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92 | sec.trays.alfa = 4; |
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93 | sec.trays.Ap = 3.94 * 'ft^2'; |
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94 | |
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95 | INITIAL |
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96 | sec.trays.OutletL.T = 270 *'K'; |
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97 | sec.trays.Level = 0.9 * sec.trays.hw; |
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98 | sec.trays.OutletL.z(1) = 0.5; |
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99 | |
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100 | OPTIONS |
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101 | TimeStep = 10; |
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102 | TimeEnd = 1000; |
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103 | |
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104 | # After running few seconds of transient the steady-state |
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105 | # can be obtained by using the results from that transient: |
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106 | |
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107 | #GuessFile="SectionColumn_Test_with2tray.rlt"; |
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108 | #Dynamic = false; |
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109 | end |
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110 | |
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111 | # column section with 8 trays |
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112 | FlowSheet SectionColumn_Test_with8tray |
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113 | PARAMETERS |
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114 | PP as Plugin(Brief="Physical Properties", |
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115 | Type="PP", |
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116 | Components = [ "isobutane", "benzene"], |
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117 | LiquidModel = "PR", |
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118 | VapourModel = "PR" |
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119 | ); |
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120 | NComp as Integer; |
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121 | |
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122 | SET |
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123 | NComp = PP.NumberOfComponents; |
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124 | |
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125 | DEVICES |
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126 | sec as Section_Column; |
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127 | feed as liquid_stream; |
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128 | reb as vapour_stream; |
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129 | cond as liquid_stream; |
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130 | zero as stream; |
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131 | |
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132 | CONNECTIONS |
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133 | feed to sec.trays(5).Inlet; |
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134 | |
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135 | zero to sec.trays([1:4]).Inlet; |
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136 | zero to sec.trays([6:8]).Inlet; |
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137 | |
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138 | reb to sec.trays(8).InletV; |
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139 | cond to sec.trays(1).InletL; |
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140 | |
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141 | SPECIFY |
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142 | feed.F = 113.4 * 'kmol/h'; |
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143 | feed.T = 291 * 'K'; |
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144 | feed.P = 168.3 * 'kPa'; |
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145 | feed.z = [0.5, 0.5]; |
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146 | |
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147 | zero.F = 0 * 'kmol/h'; |
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148 | zero.T = 300 * 'K'; |
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149 | zero.P = 1 * 'atm'; |
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150 | zero.z = [0.5, 0.5]; |
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151 | zero.v = 0; |
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152 | zero.h = 0 * 'J/mol'; |
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153 | |
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154 | cond.F = 68 * 'kmol/h'; |
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155 | cond.P = 150 * 'kPa'; |
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156 | cond.T = 281.75 * 'K'; |
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157 | cond.z = [0.6664, 0.3336]; |
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158 | |
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159 | # reb.F = 153 * 'kmol/h'; |
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160 | reb.P = 185 * 'kPa'; |
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161 | reb.T = 328.12 * 'K'; |
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162 | reb.z = [0.001848, 0.9982]; |
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163 | |
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164 | sec.trays.Emv = 1; |
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165 | sec.trays(1).OutletV.F = 150 * 'kmol/h'; |
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166 | |
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167 | SET |
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168 | sec.NTrays = 8; |
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169 | #COLUMN |
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170 | sec.trays.V = 4 * 'ft^3'; |
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171 | sec.trays.Ah = 0.394 * 'ft^2'; |
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172 | sec.trays.lw = 20.94 * 'in'; |
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173 | sec.trays.hw = 0.125 * 'ft'; |
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174 | sec.trays.Q = 0 * 'kW'; |
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175 | sec.trays.beta = 0.6; |
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176 | sec.trays.alfa = 4; |
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177 | sec.trays.Ap = 3.94 * 'ft^2'; |
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178 | |
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179 | INITIAL |
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180 | sec.trays.OutletL.T = [290:(300-290)/(sec.NTrays-1):300] *'K'; |
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181 | sec.trays.Level = 0.3 * sec.trays.hw; |
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182 | sec.trays.OutletL.z(1) = 0.5; |
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183 | |
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184 | OPTIONS |
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185 | TimeStep = 1; |
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186 | TimeEnd = 100; |
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187 | #GuessFile="SectionColumn_Test_with8tray.rlt"; |
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188 | #Dynamic = false; |
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189 | end |
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190 | |
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191 | |
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192 | FlowSheet Distillation_kettle_cond_Test |
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193 | PARAMETERS |
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194 | PP as Plugin(Brief="Physical Properties", |
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195 | Type="PP", |
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196 | Components = [ "isobutane", "n-pentane", "propylene", |
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197 | "benzene", "isobutene" ], |
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198 | LiquidModel = "PR", |
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199 | VapourModel = "PR" |
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200 | ); |
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201 | NComp as Integer; |
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202 | |
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203 | VARIABLES |
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204 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
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205 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
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206 | |
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207 | SET |
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208 | NComp = PP.NumberOfComponents; |
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209 | |
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210 | DEVICES |
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211 | col as Distillation_kettle_cond; |
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212 | feed as source; |
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213 | zero as stream; |
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214 | |
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215 | CONNECTIONS |
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216 | feed.Outlet to col.trays(5).Inlet; |
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217 | zero to col.reb.Inlet; |
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218 | zero to col.trays([1:4]).Inlet; |
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219 | zero to col.trays([6:col.NTrays]).Inlet; |
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220 | Qc.OutletQ to col.cond.InletQ; |
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221 | Qr.OutletQ to col.reb.InletQ; |
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222 | |
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223 | SPECIFY |
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224 | feed.F = 113.4 * 'kmol/h'; |
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225 | feed.T = 291 * 'K'; |
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226 | feed.P = 168.3 * 'kPa'; |
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227 | feed.Composition = 1/NComp; |
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228 | |
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229 | zero.F = 0 * 'kmol/h'; |
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230 | zero.T = 300 * 'K'; |
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231 | zero.P = 1 * 'atm'; |
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232 | zero.z = 1/NComp; |
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233 | zero.v = 0; |
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234 | zero.h = 0 * 'J/mol'; |
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235 | |
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236 | col.sptop.Outlet2.F = 85 * 'kmol/h'; |
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237 | col.reb.OutletL.F = 28.4 * 'kmol/h'; |
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238 | col.sptop.frac = 0.444445; |
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239 | col.cond.OutletV.F = 0 * 'kmol/h'; |
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240 | Qr.OutletQ = 3.7743e6 * 'kJ/h'; |
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241 | Qc.OutletQ = -3.71e6 * 'kJ/h'; |
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242 | col.pump1.dP = 16 * 'kPa'; |
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243 | col.trays.Emv = 1; |
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244 | |
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245 | col.alfaTopo = 2; |
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246 | |
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247 | SET |
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248 | col.NTrays = 8; |
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249 | col.cond.V = 2 * 'm^3'; |
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250 | col.cond.Across = 1 * 'm^2'; |
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251 | col.trays.V = 4 * 'ft^3'; |
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252 | col.trays.Ah = 0.394 * 'ft^2'; |
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253 | col.trays.lw = 20.94 * 'in'; |
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254 | col.trays.hw = 0.125 * 'ft'; |
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255 | col.trays.Q = 0 * 'kW'; |
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256 | col.trays.beta = 0.6; |
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257 | col.trays.alfa = 4; |
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258 | col.trays.Ap = 3.94 * 'ft^2'; |
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259 | col.reb.V = 2 * 'm^3'; |
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260 | col.reb.Across = 1 * 'm^2'; |
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261 | |
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262 | INITIAL |
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263 | # condenser |
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264 | col.cond.OutletL.T = 260 *'K'; |
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265 | col.cond.Level = 1 * 'm'; |
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266 | col.cond.OutletL.z([1:4]) = [0.65, 0.05, 0.01, 0.01]; |
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267 | |
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268 | # reboiler |
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269 | col.reb.OutletL.T = 350 *'K'; |
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270 | col.reb.Level = 1 * 'm'; |
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271 | col.reb.OutletL.z([1:4]) = [0.1, 0.7, 0.01, 0.01]; |
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272 | |
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273 | # column trays |
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274 | col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * 'K'; |
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275 | col.trays.Level = 1.2 * col.trays.hw; |
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276 | col.trays.OutletL.z([1:4]) = [0.5, 0.05, 0.01, 0.01]; |
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277 | |
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278 | OPTIONS |
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279 | TimeStep = 0.1; |
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280 | TimeEnd = 50; |
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281 | #GuessFile="Distillation_kettle_cond_Test.rlt"; |
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282 | #Dynamic = false; |
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283 | end |
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284 | |
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285 | |
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286 | FlowSheet Column_ctrl |
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287 | PARAMETERS |
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288 | PP as Plugin(Brief="Physical Properties", |
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289 | Type="PP", |
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290 | Components = [ "isobutane", "n-pentane", "propylene", |
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291 | "benzene", "isobutene" ], |
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292 | LiquidModel = "PR", |
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293 | VapourModel = "PR" |
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294 | ); |
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295 | NComp as Integer; |
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296 | |
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297 | Qcmin as heat_rate (Brief="Minimum Condenser Heat supplied"); |
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298 | Qcmax as heat_rate (Brief="Maximum Condenser Heat supplied"); |
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299 | Qrmin as heat_rate (Brief="Minimum Reboiler Heat supplied"); |
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300 | Qrmax as heat_rate (Brief="Maximum Reboiler Heat supplied"); |
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301 | Frmin as flow_mol (Brief="Minimum bottom flow rate"); |
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302 | Frmax as flow_mol (Brief="Maximum bottom flow rate"); |
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303 | Fcmin as flow_mol (Brief="Minimum reflux flow rate"); |
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304 | Fcmax as flow_mol (Brief="Maximum reflux flow rate"); |
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305 | Hmint as length (Brief="Minimum liquid level in top tank"); |
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306 | Hmaxt as length (Brief="Maximum liquid level in top tank"); |
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307 | Hminb as length (Brief="Minimum liquid level in reboiler"); |
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308 | Hmaxb as length (Brief="Maximum liquid level in reboiler"); |
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309 | Pmax as pressure (Brief="Maximum column pressure"); |
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310 | Pmin as pressure (Brief="Minimum column pressure"); |
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311 | Tmax as temperature (Brief="Maximum column temperature"); |
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312 | Tmin as temperature (Brief="Minimum column temperature"); |
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313 | |
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314 | VARIABLES |
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315 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
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316 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
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317 | Had_top as Real (Brief="Dimensionless condenser level"); |
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318 | Had_bot as Real (Brief="Dimensionless reboiler level"); |
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319 | Pad as Real (Brief="Dimensionless pressure"); |
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320 | Tad as Real (Brief="Dimensionless temperature"); |
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321 | RR as positive (Brief="Reflux ratio"); |
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322 | |
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323 | SET |
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324 | NComp = PP.NumberOfComponents; |
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325 | |
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326 | DEVICES |
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327 | col as Distillation_kettle_cond; |
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328 | feed as source; |
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329 | zero as stream; |
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330 | TCcond as PIDIncr; |
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331 | LCtop as PIDIncr; |
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332 | LCbot as PIDIncr; |
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333 | PC as PIDIncr; |
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334 | |
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335 | CONNECTIONS |
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336 | feed.Outlet to col.trays(5).Inlet; |
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337 | zero to col.reb.Inlet; |
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338 | zero to col.trays([1:4]).Inlet; |
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339 | zero to col.trays([6:col.NTrays]).Inlet; |
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340 | Qc.OutletQ to col.cond.InletQ; |
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341 | Qr.OutletQ to col.reb.InletQ; |
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342 | |
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343 | SET |
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344 | TCcond.tau = 0*'s'; |
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345 | TCcond.tauSet = 0*'s'; |
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346 | TCcond.alpha = 0.3; |
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347 | TCcond.bias = 0.5; |
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348 | TCcond.gamma = 1; |
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349 | TCcond.beta = 1; |
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350 | TCcond.Action = "Direct"; |
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351 | TCcond.Clip = "Clipped"; |
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352 | TCcond.Mode = "Automatic"; |
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353 | TCcond.intTime = 60*'s'; |
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354 | TCcond.gain = 0.6; |
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355 | TCcond.derivTime = 1*'s'; |
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356 | |
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357 | PC.tau = 0*'s'; |
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358 | PC.tauSet = 0*'s'; |
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359 | PC.alpha = 0.3; |
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360 | PC.bias = 0; |
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361 | PC.gamma = 1; |
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362 | PC.beta = 1; |
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363 | PC.Action = "Reverse"; |
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364 | PC.Clip = "Clipped"; |
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365 | PC.Mode = "Automatic"; |
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366 | PC.intTime = 50*'s'; |
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367 | PC.gain = 0.5; |
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368 | PC.derivTime = 1*'s'; |
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369 | |
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370 | LCtop.tau = 0*'s'; |
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371 | LCtop.tauSet = 0*'s'; |
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372 | LCtop.alpha = 0.3; |
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373 | LCtop.bias = 0.5; |
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374 | LCtop.gamma = 1; |
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375 | LCtop.beta = 1; |
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376 | LCtop.Action = "Reverse"; |
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377 | LCtop.Clip = "Clipped"; |
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378 | LCtop.Mode = "Automatic"; |
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379 | LCtop.intTime = 10*'s'; |
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380 | LCtop.gain = 1; |
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381 | LCtop.derivTime = 0*'s'; |
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382 | |
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383 | LCbot.tau = 0*'s'; |
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384 | LCbot.tauSet = 0*'s'; |
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385 | LCbot.alpha = 0.3; |
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386 | LCbot.bias = 0.5; |
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387 | LCbot.gamma = 1; |
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388 | LCbot.beta = 1; |
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389 | LCbot.Action = "Reverse"; |
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390 | LCbot.Clip = "Clipped"; |
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391 | LCbot.Mode = "Automatic"; |
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392 | LCbot.intTime = 100*'s'; |
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393 | LCbot.gain = 1; |
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394 | LCbot.derivTime = 0*'s'; |
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395 | |
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396 | EQUATIONS |
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397 | TCcond.Ports.setPoint = ((15+273.15) * 'K' - Tmin)/(Tmax-Tmin); |
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398 | TCcond.Ports.input = Tad; |
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399 | Tad = (col.cond.OutletL.T-Tmin)/(Tmax-Tmin); |
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400 | Qc.OutletQ = Qcmin+(Qcmax-Qcmin)*TCcond.Ports.output; |
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401 | |
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402 | PC.Ports.setPoint = (4.0*'bar'-Pmin)/(Pmax-Pmin); |
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403 | PC.Ports.input = Pad; |
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404 | Pad = (col.cond.OutletV.P-Pmin)/(Pmax-Pmin); |
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405 | col.cond.OutletV.F = (Fcmin+(Fcmax-Fcmin)*PC.Ports.output); |
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406 | |
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407 | LCtop.Ports.setPoint = (1.0 * 'm' - Hmint)/(Hmaxt-Hmint); |
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408 | LCtop.Ports.input = Had_top; |
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409 | Had_top = (col.cond.Level-Hmint)/(Hmaxt-Hmint); |
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410 | col.sptop.Outlet1.F = Fcmin + (Fcmax-Fcmin) * LCtop.Ports.output; |
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411 | |
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412 | LCbot.Ports.setPoint = (1.0 * 'm' - Hminb)/(Hmaxb-Hminb); |
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413 | LCbot.Ports.input = Had_bot; |
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414 | Had_bot = (col.reb.Level-Hminb)/(Hmaxb-Hminb); |
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415 | col.reb.OutletL.F = Frmin + (Frmax-Frmin) * LCbot.Ports.output; |
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416 | |
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417 | RR * (col.cond.OutletV.F + col.sptop.Outlet1.F) = col.sptop.Outlet2.F; |
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418 | |
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419 | if time < 1 * 'h' then |
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420 | col.sptop.Outlet2.F = 75 * 'kmol/h'; # reflux |
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421 | else |
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422 | col.sptop.Outlet2.F = 85 * 'kmol/h'; # reflux |
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423 | end |
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424 | |
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425 | SPECIFY |
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426 | feed.F = 113.4 * 'kmol/h'; |
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427 | feed.T = 291 * 'K'; |
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428 | feed.P = 5 * 'bar'; |
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429 | feed.Composition = 1/NComp; |
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430 | |
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431 | zero.F = 0 * 'kmol/h'; |
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432 | zero.T = 300 * 'K'; |
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433 | zero.P = 1 * 'atm'; |
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434 | zero.z = 1/NComp; |
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435 | zero.v = 0; |
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436 | zero.h = 0 * 'J/mol'; |
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437 | |
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438 | Qr.OutletQ = 4e6 * 'kJ/h'; |
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439 | col.pump1.dP = 16 * 'kPa'; |
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440 | col.trays.Emv = 1; |
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441 | col.alfaTopo = 2; |
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442 | |
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443 | SET |
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444 | col.NTrays = 8; |
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445 | col.cond.V = 2 * 'm^3'; |
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446 | col.cond.Across = 1 * 'm^2'; |
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447 | col.trays.V = 4 * 'ft^3'; |
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448 | col.trays.Ah = 0.394 * 'ft^2'; |
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449 | col.trays.lw = 20.94 * 'in'; |
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450 | col.trays.hw = 0.125 * 'ft'; |
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451 | col.trays.Q = 0 * 'kW'; |
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452 | col.trays.beta = 0.6; |
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453 | col.trays.alfa = 4; |
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454 | col.trays.Ap = 3.94 * 'ft^2'; |
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455 | col.reb.V = 2 * 'm^3'; |
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456 | col.reb.Across = 1 * 'm^2'; |
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457 | |
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458 | # Controllers type |
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459 | TCcond.PID_Select = "Ideal_AW"; |
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460 | PC.PID_Select = "Ideal_AW"; |
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461 | LCtop.PID_Select = "Ideal_AW"; |
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462 | LCbot.PID_Select = "Ideal_AW"; |
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463 | |
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464 | Qrmax = 5e6 * 'kJ/h'; |
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465 | Qrmin = 1e6 * 'kJ/h'; |
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466 | Frmin = 0 * 'kmol/h'; |
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467 | Frmax = 60 * 'kmol/h'; |
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468 | Fcmin = 0 * 'kmol/h'; |
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469 | Fcmax = 120 * 'kmol/h'; |
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470 | Hmint = 0 * 'm'; |
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471 | Hmaxt = 2 * 'm'; |
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472 | Hminb = 0 * 'm'; |
---|
473 | Hmaxb = 2 * 'm'; |
---|
474 | Pmin = 0.5 * 'bar'; |
---|
475 | Pmax = 6 * 'bar'; |
---|
476 | Qcmax = -5e5 * 'kJ/h'; |
---|
477 | Qcmin = -5e6 * 'kJ/h'; |
---|
478 | Tmax = (30+273.15) * 'K'; |
---|
479 | Tmin = (-20+273.15) * 'K'; |
---|
480 | |
---|
481 | INITIAL |
---|
482 | # condenser |
---|
483 | col.cond.OutletL.T = 260 *'K'; |
---|
484 | col.cond.Level = 1 * 'm'; |
---|
485 | col.cond.OutletL.z([1:4]) = [0.2, 0.2, 0.4, 0.05]; |
---|
486 | |
---|
487 | # reboiler |
---|
488 | col.reb.OutletL.T = 350 *'K'; |
---|
489 | col.reb.Level = 1 * 'm'; |
---|
490 | col.reb.OutletL.z([1:4]) = [0.1, 0.4, 0.1, 0.3]; |
---|
491 | |
---|
492 | # column trays |
---|
493 | col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * 'K'; |
---|
494 | col.trays.Level = 1.2 * col.trays.hw; |
---|
495 | col.trays.OutletL.z([1:4]) = [0.15, 0.3, 0.25, 0.2]; |
---|
496 | |
---|
497 | OPTIONS |
---|
498 | TimeStep = 0.1; |
---|
499 | TimeEnd = 5; |
---|
500 | TimeUnit = 'h'; |
---|
501 | InitialFile = "Column_ctrl.rlt"; |
---|
502 | DAESolver(File="dassl"); |
---|
503 | #GuessFile = "Column_ctrl.rlt"; |
---|
504 | #Dynamic = false; |
---|
505 | end |
---|
506 | |
---|
507 | # packed column section with 8 trays |
---|
508 | FlowSheet PackedSectionColumn |
---|
509 | PARAMETERS |
---|
510 | PP as Plugin(Brief="Physical Properties", |
---|
511 | Type="PP", |
---|
512 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
513 | "benzene", "isobutene" ], |
---|
514 | LiquidModel = "PR", |
---|
515 | VapourModel = "PR" |
---|
516 | ); |
---|
517 | NComp as Integer; |
---|
518 | |
---|
519 | SET |
---|
520 | NComp = PP.NumberOfComponents; |
---|
521 | |
---|
522 | DEVICES |
---|
523 | sec as Packed_Section_Column; |
---|
524 | feed as liquid_stream; |
---|
525 | reb as vapour_stream; |
---|
526 | cond as liquid_stream; |
---|
527 | zero as stream; |
---|
528 | |
---|
529 | CONNECTIONS |
---|
530 | feed to sec.stage(5).Inlet; |
---|
531 | zero to sec.stage([1:4]).Inlet; |
---|
532 | zero to sec.stage([6:sec.NStages]).Inlet; |
---|
533 | reb to sec.stage(8).InletV; |
---|
534 | cond to sec.stage(1).InletL; |
---|
535 | |
---|
536 | SPECIFY |
---|
537 | feed.F = 113.4 * 'kmol/h'; |
---|
538 | feed.T = 291 * 'K'; |
---|
539 | feed.P = 1.66 * 'atm'; |
---|
540 | feed.z = [0.2, 0.2, 0.2, 0.2, 0.2]; |
---|
541 | |
---|
542 | zero.F = 0 * 'kmol/h'; |
---|
543 | zero.T = 300 * 'K'; |
---|
544 | zero.P = 1 * 'atm'; |
---|
545 | zero.z = [0.2, 0.2, 0.2, 0.2, 0.2]; |
---|
546 | zero.v = 0; |
---|
547 | zero.h = 0 * 'J/mol'; |
---|
548 | |
---|
549 | cond.F = 85 * 'kmol/h'; |
---|
550 | cond.P = 2.33 * 'atm'; |
---|
551 | cond.T = 283.5 * 'K'; |
---|
552 | cond.z = [0.599, 0.044, 0.035, 0.007, 0.315]; |
---|
553 | |
---|
554 | reb.F = 137.57 * 'kmol/h'; |
---|
555 | reb.P = 2.46 * 'atm'; |
---|
556 | reb.T = 325 * 'K'; |
---|
557 | reb.z = [0.16, 0.542, 0.013, 0.008, 0.277]; |
---|
558 | |
---|
559 | sec.dP = 0.008 * 'atm'; #queda de pressao na secao! |
---|
560 | |
---|
561 | SET |
---|
562 | sec.H = 4 * 'm';#altura do recheio |
---|
563 | sec.NStages = 8; #numero de estagios teoricos do recheio |
---|
564 | sec.stage.Q = 0 * 'kW'; |
---|
565 | sec.stage.d = 1.009 * 'm'; |
---|
566 | sec.stage.Cpo = 0.763; |
---|
567 | sec.stage.e = 0.951; |
---|
568 | sec.stage.a = 112.6 * 'm^2/m^3'; |
---|
569 | sec.stage.Qsil = 0.1;#coeficiente de resistencia do recheio |
---|
570 | |
---|
571 | INITIAL |
---|
572 | sec.stage.OutletL.T =[283:(325-283)/(sec.NStages-1):325] *'K'; |
---|
573 | sec.stage.ML = 0.01 * 'kmol'; |
---|
574 | sec.stage.OutletL.z([1:4]) = [0.3, 0.2, 0.002, 0.1]; |
---|
575 | |
---|
576 | OPTIONS |
---|
577 | DAESolver(File="dassl"); |
---|
578 | NLASolver(File="nlasolver"); |
---|
579 | TimeStep = 10; |
---|
580 | TimeEnd = 100; |
---|
581 | end |
---|
582 | |
---|
583 | FlowSheet Packed_kettle_cond_Test |
---|
584 | PARAMETERS |
---|
585 | PP as Plugin(Brief="Physical Properties", |
---|
586 | Type="PP", |
---|
587 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
588 | "benzene", "isobutene" ], |
---|
589 | LiquidModel = "PR", |
---|
590 | VapourModel = "PR" |
---|
591 | ); |
---|
592 | NComp as Integer; |
---|
593 | |
---|
594 | VARIABLES |
---|
595 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
---|
596 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
---|
597 | |
---|
598 | SET |
---|
599 | NComp = PP.NumberOfComponents; |
---|
600 | |
---|
601 | DEVICES |
---|
602 | col as PackedDistillation_kettle_cond; |
---|
603 | feed as source; |
---|
604 | zero as stream; |
---|
605 | |
---|
606 | CONNECTIONS |
---|
607 | feed.Outlet to col.stage(5).Inlet; |
---|
608 | zero to col.reb.Inlet; |
---|
609 | zero to col.stage([1:4]).Inlet; |
---|
610 | zero to col.stage([6:col.NStages]).Inlet; |
---|
611 | Qc.OutletQ to col.cond.InletQ; |
---|
612 | Qr.OutletQ to col.reb.InletQ; |
---|
613 | |
---|
614 | SPECIFY |
---|
615 | feed.F = 113.4 * 'kmol/h'; |
---|
616 | feed.T = 291 * 'K'; |
---|
617 | feed.P = 168.3 * 'kPa'; |
---|
618 | feed.Composition = 1/NComp; |
---|
619 | |
---|
620 | zero.F = 0 * 'kmol/h'; |
---|
621 | zero.T = 300 * 'K'; |
---|
622 | zero.P = 1 * 'atm'; |
---|
623 | zero.z = 1/NComp; |
---|
624 | zero.v = 0; |
---|
625 | zero.h = 0 * 'J/mol'; |
---|
626 | |
---|
627 | col.sptop.Outlet2.F = 85 * 'kmol/h'; |
---|
628 | col.reb.OutletL.F = 28.4 * 'kmol/h'; |
---|
629 | col.sptop.frac = 0.444445; |
---|
630 | col.cond.OutletV.F = 0 * 'kmol/h'; |
---|
631 | Qr.OutletQ = 3.7743e6 * 'kJ/h'; |
---|
632 | Qc.OutletQ = -3.71e6 * 'kJ/h'; |
---|
633 | col.pump1.dP = 16 * 'kPa'; |
---|
634 | |
---|
635 | col.dP = 0.024 * 'atm'; #queda de pressao entre o topo e o fundo da coluna. |
---|
636 | |
---|
637 | SET |
---|
638 | col.H = 3.5 * 'm'; # altura de recheio |
---|
639 | col.NStages = 8; # numero de estagios teoricos do recheio |
---|
640 | col.stage.Q = 0 * 'kW'; |
---|
641 | col.stage.d = 2.24 * 'ft'; |
---|
642 | col.stage.Cpo = 0.763; |
---|
643 | col.stage.e = 0.951; |
---|
644 | col.stage.a = 112.6 * 'm^2/m^3'; |
---|
645 | |
---|
646 | col.cond.V = 2 * 'm^3'; |
---|
647 | col.cond.Across = 1 * 'm^2'; |
---|
648 | col.reb.V = 2 * 'm^3'; |
---|
649 | col.reb.Across = 1 * 'm^2'; |
---|
650 | col.stage.Qsil = 2; # coeficiente de resistencia do recheio |
---|
651 | |
---|
652 | INITIAL |
---|
653 | # condenser |
---|
654 | col.cond.OutletL.T = 260 *'K'; |
---|
655 | col.cond.Level = 1 * 'm'; |
---|
656 | col.cond.OutletL.z([1:4]) = [0.65, 0.05, 0.01, 0.01]; |
---|
657 | |
---|
658 | # reboiler |
---|
659 | col.reb.OutletL.T = 330 *'K'; |
---|
660 | col.reb.Level = 1 * 'm'; |
---|
661 | col.reb.OutletL.z([1:4]) = [0.1, 0.7, 0.01, 0.01]; |
---|
662 | |
---|
663 | # column trays |
---|
664 | col.stage.OutletL.T = [290:(330-290)/(col.NStages-1):330] * 'K'; |
---|
665 | col.stage.ML = 0.1 * 'kmol'; |
---|
666 | col.stage.OutletL.z([1:4]) = [0.15, 0.5, 0.001, 0.1]; |
---|
667 | |
---|
668 | OPTIONS |
---|
669 | TimeStep = 10; |
---|
670 | TimeEnd = 500; |
---|
671 | end |
---|
672 | |
---|
673 | FlowSheet PackedColumn_ctrl |
---|
674 | PARAMETERS |
---|
675 | PP as Plugin(Brief="Physical Properties", |
---|
676 | Type="PP", |
---|
677 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
678 | "benzene", "isobutene" ], |
---|
679 | LiquidModel = "PR", |
---|
680 | VapourModel = "PR" |
---|
681 | ); |
---|
682 | NComp as Integer; |
---|
683 | |
---|
684 | Qcmin as heat_rate (Brief="Minimum Condenser Heat supplied"); |
---|
685 | Qcmax as heat_rate (Brief="Maximum Condenser Heat supplied"); |
---|
686 | Qrmin as heat_rate (Brief="Minimum Reboiler Heat supplied"); |
---|
687 | Qrmax as heat_rate (Brief="Maximum Reboiler Heat supplied"); |
---|
688 | Frmin as flow_mol (Brief="Minimum bottom flow rate"); |
---|
689 | Frmax as flow_mol (Brief="Maximum bottom flow rate"); |
---|
690 | Fcmin as flow_mol (Brief="Minimum reflux flow rate"); |
---|
691 | Fcmax as flow_mol (Brief="Maximum reflux flow rate"); |
---|
692 | Hmint as length (Brief="Minimum liquid level in top tank"); |
---|
693 | Hmaxt as length (Brief="Maximum liquid level in top tank"); |
---|
694 | Hminb as length (Brief="Minimum liquid level in reboiler"); |
---|
695 | Hmaxb as length (Brief="Maximum liquid level in reboiler"); |
---|
696 | Pmax as pressure (Brief="Maximum column pressure"); |
---|
697 | Pmin as pressure (Brief="Minimum column pressure"); |
---|
698 | Tmax as temperature (Brief="Maximum column temperature"); |
---|
699 | Tmin as temperature (Brief="Minimum column temperature"); |
---|
700 | |
---|
701 | VARIABLES |
---|
702 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
---|
703 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
---|
704 | Had_top as Real (Brief="Dimensionless condenser level"); |
---|
705 | Had_bot as Real (Brief="Dimensionless reboiler level"); |
---|
706 | Pad as Real (Brief="Dimensionless pressure"); |
---|
707 | Tad as Real (Brief="Dimensionless temperature"); |
---|
708 | RR as positive (Brief="Reflux ratio"); |
---|
709 | |
---|
710 | SET |
---|
711 | NComp = PP.NumberOfComponents; |
---|
712 | |
---|
713 | DEVICES |
---|
714 | col as PackedDistillation_kettle_cond; |
---|
715 | feed as source; |
---|
716 | zero as stream; |
---|
717 | TCcond as PIDIncr; |
---|
718 | LCtop as PIDIncr; |
---|
719 | LCbot as PIDIncr; |
---|
720 | PC as PIDIncr; |
---|
721 | |
---|
722 | CONNECTIONS |
---|
723 | feed.Outlet to col.stage(5).Inlet; |
---|
724 | zero to col.reb.Inlet; |
---|
725 | zero to col.stage([1:4]).Inlet; |
---|
726 | zero to col.stage([6:col.NStages]).Inlet; |
---|
727 | Qc.OutletQ to col.cond.InletQ; |
---|
728 | Qr.OutletQ to col.reb.InletQ; |
---|
729 | |
---|
730 | SET |
---|
731 | TCcond.Action = "Direct"; |
---|
732 | TCcond.Clip = "Clipped"; |
---|
733 | TCcond.Mode = "Automatic"; |
---|
734 | TCcond.tau = 0*'s'; |
---|
735 | TCcond.tauSet = 0*'s'; |
---|
736 | TCcond.alpha = 0.3; |
---|
737 | TCcond.bias = 0.5; |
---|
738 | TCcond.gamma = 1; |
---|
739 | TCcond.beta = 1; |
---|
740 | TCcond.intTime = 60*'s'; |
---|
741 | TCcond.gain = 0.6; |
---|
742 | TCcond.derivTime = 1*'s'; |
---|
743 | |
---|
744 | PC.Action = "Reverse"; |
---|
745 | PC.Clip = "Clipped"; |
---|
746 | PC.Mode = "Automatic"; |
---|
747 | PC.tau = 0*'s'; |
---|
748 | PC.tauSet = 0*'s'; |
---|
749 | PC.alpha = 0.3; |
---|
750 | PC.bias = 0; |
---|
751 | PC.gamma = 1; |
---|
752 | PC.beta = 1; |
---|
753 | PC.intTime = 50*'s'; |
---|
754 | PC.gain = 0.5; |
---|
755 | PC.derivTime = 1*'s'; |
---|
756 | |
---|
757 | LCtop.Action = "Reverse"; |
---|
758 | LCtop.Clip = "Clipped"; |
---|
759 | LCtop.Mode = "Automatic"; |
---|
760 | LCtop.tau = 0*'s'; |
---|
761 | LCtop.tauSet = 0*'s'; |
---|
762 | LCtop.alpha = 0.3; |
---|
763 | LCtop.bias = 0.5; |
---|
764 | LCtop.gamma = 1; |
---|
765 | LCtop.beta = 1; |
---|
766 | LCtop.intTime = 10*'s'; |
---|
767 | LCtop.gain = 1; |
---|
768 | LCtop.derivTime = 0*'s'; |
---|
769 | |
---|
770 | LCbot.Action = "Reverse"; |
---|
771 | LCbot.Clip = "Clipped"; |
---|
772 | LCbot.Mode = "Automatic"; |
---|
773 | LCbot.tau = 0*'s'; |
---|
774 | LCbot.tauSet = 0*'s'; |
---|
775 | LCbot.alpha = 0.3; |
---|
776 | LCbot.bias = 0.5; |
---|
777 | LCbot.gamma = 1; |
---|
778 | LCbot.beta = 1; |
---|
779 | LCbot.intTime = 100*'s'; |
---|
780 | LCbot.gain = 1; |
---|
781 | LCbot.derivTime = 0*'s'; |
---|
782 | |
---|
783 | EQUATIONS |
---|
784 | TCcond.Ports.setPoint = ((15+273.15) * 'K' - Tmin)/(Tmax-Tmin); |
---|
785 | TCcond.Ports.input = Tad; |
---|
786 | Tad = (col.cond.OutletL.T-Tmin)/(Tmax-Tmin); |
---|
787 | Qc.OutletQ = Qcmin+(Qcmax-Qcmin)*TCcond.Ports.output; |
---|
788 | |
---|
789 | PC.Ports.setPoint = (4.0*'bar'-Pmin)/(Pmax-Pmin); |
---|
790 | PC.Ports.input = Pad; |
---|
791 | Pad = (col.cond.OutletV.P-Pmin)/(Pmax-Pmin); |
---|
792 | col.cond.OutletV.F = (Fcmin+(Fcmax-Fcmin)*PC.Ports.output); |
---|
793 | |
---|
794 | LCtop.Ports.setPoint = (1.0 * 'm' - Hmint)/(Hmaxt-Hmint); |
---|
795 | LCtop.Ports.input = Had_top; |
---|
796 | Had_top = (col.cond.Level-Hmint)/(Hmaxt-Hmint); |
---|
797 | col.sptop.Outlet1.F = Fcmin + (Fcmax-Fcmin) * LCtop.Ports.output; |
---|
798 | |
---|
799 | LCbot.Ports.setPoint = (1.0 * 'm' - Hminb)/(Hmaxb-Hminb); |
---|
800 | LCbot.Ports.input = Had_bot; |
---|
801 | Had_bot = (col.reb.Level-Hminb)/(Hmaxb-Hminb); |
---|
802 | col.reb.OutletL.F = Frmin + (Frmax-Frmin) * LCbot.Ports.output; |
---|
803 | |
---|
804 | RR * (col.cond.OutletV.F + col.sptop.Outlet1.F) = col.sptop.Outlet2.F; |
---|
805 | |
---|
806 | if time < 1 * 'h' then |
---|
807 | col.sptop.Outlet2.F = 75 * 'kmol/h'; # reflux |
---|
808 | else |
---|
809 | col.sptop.Outlet2.F = 85 * 'kmol/h'; # reflux |
---|
810 | end |
---|
811 | |
---|
812 | SPECIFY |
---|
813 | feed.F = 113.4 * 'kmol/h'; |
---|
814 | feed.T = 291 * 'K'; |
---|
815 | feed.P = 5 * 'bar'; |
---|
816 | feed.Composition = 1/NComp; |
---|
817 | |
---|
818 | zero.F = 0 * 'kmol/h'; |
---|
819 | zero.T = 300 * 'K'; |
---|
820 | zero.P = 1 * 'atm'; |
---|
821 | zero.z = 1/NComp; |
---|
822 | zero.v = 0; |
---|
823 | zero.h = 0 * 'J/mol'; |
---|
824 | |
---|
825 | Qr.OutletQ = 4e6 * 'kJ/h'; |
---|
826 | col.pump1.dP = 16 * 'kPa'; |
---|
827 | |
---|
828 | col.dP = 0.024 * 'atm'; #queda de pressao entre o topo e o fundo da coluna |
---|
829 | |
---|
830 | SET |
---|
831 | col.H = 3.5 * 'm'; #altura do recheio |
---|
832 | col.NStages = 8; #numero de estagios teoricos do recheio |
---|
833 | col.stage.Q = 0 * 'kW'; |
---|
834 | col.stage.d = 2.24 * 'ft'; |
---|
835 | col.stage.Cpo = 0.763; |
---|
836 | col.stage.e = 0.951; |
---|
837 | col.stage.a = 112.6 * 'm^2/m^3'; |
---|
838 | |
---|
839 | col.cond.V = 2 * 'm^3'; |
---|
840 | col.cond.Across = 1 * 'm^2'; |
---|
841 | col.reb.V = 2 * 'm^3'; |
---|
842 | col.reb.Across = 1 * 'm^2'; |
---|
843 | |
---|
844 | col.stage.Qsil = 2; #coeficiente de resistencia do recheio |
---|
845 | |
---|
846 | # Controllers type |
---|
847 | TCcond.PID_Select = "Ideal_AW"; |
---|
848 | PC.PID_Select = "Ideal_AW"; |
---|
849 | LCtop.PID_Select = "Ideal_AW"; |
---|
850 | LCbot.PID_Select = "Ideal_AW"; |
---|
851 | |
---|
852 | Qrmax = 5e6 * 'kJ/h'; |
---|
853 | Qrmin = 1e6 * 'kJ/h'; |
---|
854 | Frmin = 0 * 'kmol/h'; |
---|
855 | Frmax = 60 * 'kmol/h'; |
---|
856 | Fcmin = 0 * 'kmol/h'; |
---|
857 | Fcmax = 120 * 'kmol/h'; |
---|
858 | Hmint = 0 * 'm'; |
---|
859 | Hmaxt = 2 * 'm'; |
---|
860 | Hminb = 0 * 'm'; |
---|
861 | Hmaxb = 2 * 'm'; |
---|
862 | Pmin = 0.5 * 'bar'; |
---|
863 | Pmax = 6 * 'bar'; |
---|
864 | Qcmax = -5e5 * 'kJ/h'; |
---|
865 | Qcmin = -5e6 * 'kJ/h'; |
---|
866 | Tmax = (30+273.15) * 'K'; |
---|
867 | Tmin = (-20+273.15) * 'K'; |
---|
868 | |
---|
869 | INITIAL |
---|
870 | # condenser |
---|
871 | col.cond.OutletL.T = 260 *'K'; |
---|
872 | col.cond.Level = 1 * 'm'; |
---|
873 | col.cond.OutletL.z([1:4]) = [0.2, 0.2, 0.4, 0.05]; |
---|
874 | |
---|
875 | # reboiler |
---|
876 | col.reb.OutletL.T = 350 *'K'; |
---|
877 | col.reb.Level = 1 * 'm'; |
---|
878 | col.reb.OutletL.z([1:4]) = [0.1, 0.4, 0.1, 0.3]; |
---|
879 | |
---|
880 | # column trays |
---|
881 | col.stage.OutletL.T = [290:(330-290)/(col.NStages-1):330] * 'K'; |
---|
882 | col.stage.ML = 0.1 * 'kmol'; |
---|
883 | col.stage.OutletL.z([1:4]) = [0.15, 0.3, 0.25, 0.2]; |
---|
884 | |
---|
885 | OPTIONS |
---|
886 | TimeStep = 0.1; |
---|
887 | TimeEnd = 5; |
---|
888 | TimeUnit = 'h'; |
---|
889 | InitialFile = "Packed_Column_ctrl.rlt"; |
---|
890 | #GuessFile = "Packed_Column_ctrl.rlt"; |
---|
891 | #Dynamic = false; |
---|
892 | end |
---|