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 reaction column model |
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17 | *-------------------------------------------------------------------- |
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18 | * |
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19 | * This sample file needs VRTherm (www.vrtech.com.br) to run. |
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20 | * |
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21 | *---------------------------------------------------------------------- |
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22 | * Author: Paula B. Staudt |
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23 | * $Id: sample_columnReact.mso 580 2008-07-26 19:34:58Z bicca $ |
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24 | *--------------------------------------------------------------------*# |
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25 | using "controllers/PIDs"; |
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26 | using "stage_separators/column"; |
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27 | |
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28 | FlowSheet Startup_ReactiveDistillation |
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29 | PARAMETERS |
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30 | PP as Plugin(Brief="Physical Properties", Type="PP", |
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31 | Components = [ "acetic acid", "ethanol", "ethyl acetate", "water"], |
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32 | LiquidModel = "UNIFAC", |
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33 | VapourModel = "Ideal" |
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34 | ); |
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35 | NComp as Integer; |
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36 | |
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37 | SET |
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38 | NComp = PP.NumberOfComponents; |
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39 | |
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40 | DEVICES |
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41 | col as ReactiveDistillation; |
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42 | feed as simple_source; |
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43 | zero as stream; |
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44 | PIDLreb as PID; |
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45 | PIDLcond as PID; |
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46 | PIDTreb as PID; |
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47 | PIDTcond as PID; |
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48 | |
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49 | VARIABLES |
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50 | Qc as energy_source(Brief="Condenser Heat supplied"); |
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51 | Qr as energy_source(Brief="Reboiler Heat supplied"); |
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52 | Qcmin as heat_rate (Brief="Condenser Heat supplied"); |
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53 | Qcmax as heat_rate (Brief="Condenser Heat supplied"); |
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54 | Qrmin as heat_rate (Brief="Reboiler Heat supplied"); |
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55 | Qrmax as heat_rate (Brief="Reboiler Heat supplied"); |
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56 | Fmin as flow_mol; |
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57 | Fmax as flow_mol; |
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58 | Frmin as flow_mol; |
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59 | Frmax as flow_mol; |
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60 | |
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61 | Lreb_ad as Real; |
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62 | Lrebmin as length; |
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63 | Lrebmax as length; |
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64 | Lcond_ad as Real; |
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65 | Lcondmin as length; |
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66 | Lcondmax as length; |
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67 | Treb_ad as Real; |
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68 | Trebmin as temperature; |
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69 | Trebmax as temperature; |
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70 | Tcond_ad as Real; |
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71 | Tcondmin as temperature; |
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72 | Tcondmax as temperature; |
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73 | |
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74 | CONNECTIONS |
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75 | feed.Outlet to col.trays(5).Inlet; |
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76 | zero to col.reb.Inlet; |
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77 | zero to col.trays([1:4]).Inlet; |
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78 | zero to col.trays([6:col.NTrays]).Inlet; |
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79 | Qc.OutletQ to col.cond.InletQ; |
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80 | Qr.OutletQ to col.reb.InletQ; |
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81 | |
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82 | EQUATIONS |
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83 | col.sp.frac = 0.09; |
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84 | |
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85 | #reboiler startup |
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86 | if time < 400 * 's' then |
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87 | col.reb.startup = 1; |
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88 | else |
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89 | col.reb.startup = 0; |
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90 | end |
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91 | |
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92 | if col.reb.startup then |
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93 | Qc.OutletQ = 0 * PIDTcond.Ports.output * 'kJ/s'; |
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94 | Qr.OutletQ = 0 * PIDTreb.Ports.output * 'kJ/s'; |
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95 | |
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96 | PIDTreb.Ports.input = PIDTreb.Ports.setPoint; |
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97 | else |
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98 | Qc.OutletQ = Qcmin+(Qcmax-Qcmin)*PIDTcond.Ports.output; |
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99 | Qr.OutletQ = Qrmin+(Qrmax-Qrmin)*PIDTreb.Ports.output; |
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100 | |
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101 | PIDTreb.Ports.input=Treb_ad; |
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102 | end |
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103 | |
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104 | SET |
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105 | PIDLreb.tau = 1*'s'; |
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106 | PIDLreb.tauSet=1*'s'; |
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107 | PIDLreb.bias = 0; |
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108 | PIDLreb.alpha=1; |
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109 | PIDLreb.gamma=1; |
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110 | PIDLreb.beta=1; |
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111 | PIDLreb.gain=0.9; |
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112 | PIDLreb.intTime=20*'s'; |
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113 | PIDLreb.derivTime=0*'s'; |
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114 | PIDLreb.Action = "Direct"; |
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115 | PIDLreb.Clip = "Clipped"; |
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116 | PIDLreb.Mode = "Automatic"; |
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117 | |
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118 | |
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119 | PIDLcond.tau = 1*'s'; |
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120 | PIDLcond.tauSet=1*'s'; |
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121 | PIDLcond.bias = 0.5; |
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122 | PIDLcond.alpha=1; |
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123 | PIDLcond.gamma=1; |
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124 | PIDLcond.beta=1; |
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125 | PIDLcond.gain=1; |
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126 | PIDLcond.intTime=10*'s'; |
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127 | PIDLcond.derivTime=1*'s'; |
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128 | PIDLcond.Action = "Direct"; |
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129 | PIDLcond.Clip = "Clipped"; |
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130 | PIDLcond.Mode = "Automatic"; |
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131 | |
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132 | PIDTreb.tau = 1*'s'; |
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133 | PIDTreb.tauSet=1*'s'; |
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134 | PIDTreb.bias = 0.2; |
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135 | PIDTreb.alpha=0.2; |
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136 | PIDTreb.gamma=1; |
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137 | PIDTreb.beta=1; |
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138 | PIDTreb.gain=0.9; |
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139 | PIDTreb.intTime=100*'s'; |
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140 | PIDTreb.derivTime=1*'s'; |
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141 | PIDTreb.Action = "Direct"; |
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142 | PIDTreb.Clip = "Clipped"; |
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143 | PIDTreb.Mode = "Automatic"; |
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144 | |
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145 | PIDTcond.tau = 1*'s'; |
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146 | PIDTcond.tauSet=1*'s'; |
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147 | PIDTcond.bias = 0.5; |
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148 | PIDTcond.alpha=0.2; |
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149 | PIDTcond.gamma=1; |
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150 | PIDTcond.beta=1; |
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151 | PIDTcond.gain=0.9; |
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152 | PIDTcond.intTime=100*'s'; |
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153 | PIDTcond.derivTime=1*'s'; |
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154 | PIDTcond.Action = "Reverse"; |
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155 | PIDTcond.Clip = "Clipped"; |
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156 | PIDTcond.Mode = "Automatic"; |
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157 | |
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158 | |
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159 | SPECIFY |
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160 | feed.F = 1.076 * 'mol/s'; |
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161 | feed.T = 300 * 'K'; |
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162 | feed.P = 3.0 * 'atm'; |
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163 | feed.MolarComposition = [0.4962, 0.4808, 0, 0.0229]; |
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164 | |
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165 | zero.F = 0 * 'kmol/h'; |
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166 | zero.T = 353 * 'K'; |
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167 | zero.P = 1 * 'atm'; |
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168 | zero.z = [0.4962, 0.4808, 0, 0.0229]; |
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169 | zero.v = 0; |
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170 | zero.h = 0 * 'J/mol'; |
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171 | |
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172 | col.p.dP = 2 * 'atm' - col.sp.Outlet2.P; |
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173 | col.trays.Emv = 1; |
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174 | |
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175 | EQUATIONS |
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176 | |
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177 | # Controller PID |
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178 | PIDLreb.Ports.setPoint=(0.5 * 'm' - Lrebmin)/(Lrebmax-Lrebmin); |
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179 | Lreb_ad*(Lrebmax-Lrebmin)=col.reb.Level-Lrebmin; |
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180 | PIDLreb.Ports.input=Lreb_ad; |
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181 | col.reb.OutletL.F = Frmin + (Frmax-Frmin) * PIDLreb.Ports.output; |
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182 | |
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183 | PIDLcond.Ports.setPoint=(0.5 * 'm' - Lcondmin)/(Lcondmax-Lcondmin); |
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184 | Lcond_ad*(Lcondmax-Lcondmin)=col.cond.Level-Lcondmin; |
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185 | PIDLcond.Ports.input=Lcond_ad; |
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186 | col.sp.Outlet1.F = Fmin + (Fmax-Fmin) * PIDLcond.Ports.output; |
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187 | |
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188 | PIDTreb.Ports.setPoint= (366 * 'K' - Trebmin)/(Trebmax-Trebmin); |
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189 | Treb_ad*(Trebmax-Trebmin)=col.reb.OutletL.T-Trebmin; |
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190 | |
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191 | PIDTcond.Ports.setPoint= (346 * 'K' - Tcondmin)/(Tcondmax-Tcondmin); |
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192 | Tcond_ad*(Tcondmax-Tcondmin)=col.cond.OutletL.T-Tcondmin; |
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193 | PIDTcond.Ports.input=Tcond_ad; |
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194 | |
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195 | "range for normalization" |
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196 | Lrebmax=0.8*'m'; |
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197 | Lrebmin=0.1*'m'; |
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198 | Lcondmax=0.8*'m'; |
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199 | Lcondmin=0.1*'m'; |
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200 | Trebmax=400*'K'; |
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201 | Trebmin=200*'K'; |
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202 | Tcondmax=380*'K'; |
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203 | Tcondmin=250*'K'; |
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204 | Qcmin = -100 * 'kJ/s'; |
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205 | Qcmax = 0 * 'kJ/s'; |
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206 | Qrmin = 0 * 'kJ/s'; |
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207 | Qrmax = 150 * 'kJ/s'; |
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208 | Fmin = 0 * 'kmol/h'; |
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209 | Fmax = 2 * 'kmol/h'; |
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210 | Frmin = 0 * 'kmol/h'; |
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211 | Frmax = 5 * 'kmol/h'; |
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212 | |
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213 | col.cond.OutletV.F = 0 * 'kmol/h'; |
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214 | |
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215 | SET |
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216 | PIDLreb.PID_Select = "Ideal_AW"; |
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217 | PIDLcond.PID_Select = "Ideal_AW"; |
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218 | PIDTreb.PID_Select = "Ideal_AW"; |
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219 | PIDTcond.PID_Select = "Ideal_AW"; |
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220 | |
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221 | col.NTrays = 11; |
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222 | |
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223 | col.trays.stoic = [-1, -1, 1, 1]; |
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224 | col.cond.stoic = [-1, -1, 1, 1]; |
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225 | col.reb.stoic = [-1, -1, 1, 1]; |
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226 | col.cond.V = 6 * 'l'; |
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227 | col.cond.Across = 6 * 'l/m'; |
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228 | |
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229 | col.trays.V = 0.0961 * 'm^3'; |
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230 | col.trays.Ah = 0.04 * 'm^2'; |
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231 | col.trays.lw = 0.457 * 'm'; |
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232 | col.trays.hw = 0.05 * 'm'; |
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233 | col.trays.Q = 0 * 'kW'; |
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234 | col.trays.beta = 0.8; |
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235 | col.trays.alfa = 30; |
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236 | col.alfacond = 100000; |
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237 | col.trays.Ap = 0.07 * 'm^2'; |
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238 | |
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239 | col.trays.Hr = 0 * 'kJ/mol'; |
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240 | col.cond.Hr = 0 * 'kJ/mol'; |
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241 | col.reb.Hr = 0 * 'kJ/mol'; |
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242 | col.reb.V = 20 * 'l'; |
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243 | col.reb.Across = 20 * 'l/m'; |
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244 | |
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245 | col.reb.Pstartup = 1 * 'atm'; |
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246 | col.trays.Pstartup = 1 * 'atm'; |
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247 | col.cond.Pstartup = 1 * 'atm'; |
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248 | |
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249 | INITIAL |
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250 | # condenser |
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251 | col.cond.OutletL.T = 300 *'K'; |
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252 | col.cond.Level = 0.4 * 'm'; |
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253 | col.cond.OutletL.z([1:3]) = [0.4962, 0.4808, 0]; |
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254 | |
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255 | # reboiler |
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256 | col.reb.OutletL.T = 300 * 'K'; |
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257 | col.reb.Level = 0.4 * 'm'; |
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258 | col.reb.OutletL.z([1:3]) = [0.4962, 0.4808, 0]; |
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259 | |
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260 | # column trays |
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261 | col.trays.OutletL.T = 300 * 'K'; |
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262 | col.trays.Level = 0.1 * col.trays.hw; |
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263 | col.trays.OutletL.z([1:3]) = [0.4962, 0.4808, 0]; |
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264 | |
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265 | OPTIONS |
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266 | TimeStep = 100; |
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267 | TimeEnd = 50000; |
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268 | end |
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