| [86] | 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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| [88] | 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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| [86] | 22 | * |
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| 23 | *---------------------------------------------------------------------- |
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| 24 | * Author: Paula B. Staudt |
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| 25 | * $Id: sample_column.mso 125 2007-01-22 19:57:16Z rafael $ |
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| 26 | *--------------------------------------------------------------------*# |
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| 27 | |
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| [1] | 28 | using "stage_separators/column"; |
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| [111] | 29 | using "controllers/PIDIncr"; |
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| [1] | 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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| [125] | 34 | PP as Plugin(Brief="Physical Properties",File="vrpp"); |
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| [1] | 35 | NComp as Integer; |
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| 36 | |
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| 37 | SET |
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| [88] | 38 | PP.Components = [ "isobutane", "benzene"]; |
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| [1] | 39 | PP.LiquidModel = "PR"; |
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| 40 | PP.VapourModel = "PR"; |
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| 41 | NComp = PP.NumberOfComponents; |
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| 42 | |
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| 43 | DEVICES |
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| 44 | sec as Section_Column; |
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| [125] | 45 | feed as liquid_stream; |
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| 46 | reb as vapour_stream; |
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| 47 | cond as liquid_stream; |
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| [1] | 48 | zero as stream; |
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| 49 | |
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| 50 | CONNECTIONS |
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| 51 | feed to sec.trays(2).Inlet; |
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| 52 | zero to sec.trays(1).Inlet; |
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| 53 | reb to sec.trays(2).InletV; |
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| 54 | cond to sec.trays(1).InletL; |
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| 55 | |
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| 56 | SPECIFY |
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| 57 | feed.F = 113.4 * "kmol/h"; |
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| 58 | feed.T = 291 * "K"; |
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| 59 | feed.P = 168.3 * "kPa"; |
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| 60 | feed.z = [0.5, 0.5]; |
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| 61 | |
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| 62 | zero.F = 0 * "kmol/h"; |
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| 63 | zero.T = 300 * "K"; |
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| 64 | zero.P = 1 * "atm"; |
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| 65 | zero.z = [0.5, 0.5]; |
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| 66 | zero.v = 0; |
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| 67 | zero.h = 0 * "J/mol"; |
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| 68 | |
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| 69 | cond.F = 68 * "kmol/h"; |
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| 70 | cond.P = 150 * "kPa"; |
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| 71 | cond.T = 281.75 * "K"; |
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| 72 | cond.z = [0.6664, 0.3336]; |
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| 73 | |
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| 74 | reb.F = 153 * "kmol/h"; |
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| 75 | reb.P = 185 * "kPa"; |
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| 76 | reb.T = 328.12 * "K"; |
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| 77 | reb.z = [0.001848, 0.9982]; |
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| 78 | |
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| 79 | sec.trays.Emv = 1; |
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| 80 | |
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| 81 | SET |
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| 82 | sec.NTrays = 2; |
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| 83 | #COLUMN |
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| 84 | sec.trays.V = 4 * "ft^3"; |
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| 85 | sec.trays.Ah = 0.394 * "ft^2"; |
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| 86 | sec.trays.lw = 20.94 * "in"; |
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| 87 | sec.trays.hw = 0.125 * "ft"; |
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| 88 | sec.trays.Q = 0 * "kW"; |
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| 89 | sec.trays.beta = 0.6; |
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| 90 | sec.trays.alfa = 4; |
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| 91 | sec.trays.Ap = 3.94 * "ft^2"; |
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| 92 | |
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| 93 | INITIAL |
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| 94 | sec.trays.OutletL.T = 290 *"K"; |
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| 95 | sec.trays.Level = 0.9 * sec.trays.hw; |
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| 96 | sec.trays.OutletL.z(1) = 0.5; |
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| 97 | |
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| 98 | OPTIONS |
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| 99 | #relativeAccuracy = 1e-3; |
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| [46] | 100 | NLASolver = "sundials"; |
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| [125] | 101 | TimeStep = 10; |
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| 102 | TimeEnd = 1000; |
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| [111] | 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 | #mode = "steady"; |
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| [1] | 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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| [125] | 114 | PP as Plugin(Brief="Physical Properties",File="vrpp"); |
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| [1] | 115 | NComp as Integer; |
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| 116 | |
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| 117 | SET |
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| [88] | 118 | PP.Components = [ "isobutane", "benzene"]; |
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| [1] | 119 | PP.LiquidModel = "PR"; |
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| 120 | PP.VapourModel = "PR"; |
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| 121 | PP.Derivatives = 0; |
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| 122 | NComp = PP.NumberOfComponents; |
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| 123 | |
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| 124 | DEVICES |
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| 125 | sec as Section_Column; |
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| [125] | 126 | feed as liquid_stream; |
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| 127 | reb as vapour_stream; |
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| 128 | cond as liquid_stream; |
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| [1] | 129 | zero as stream; |
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| 130 | |
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| 131 | CONNECTIONS |
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| 132 | feed to sec.trays(5).Inlet; |
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| 133 | |
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| 134 | zero to sec.trays([1:4]).Inlet; |
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| 135 | zero to sec.trays([6:8]).Inlet; |
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| 136 | |
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| 137 | reb to sec.trays(8).InletV; |
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| 138 | cond to sec.trays(1).InletL; |
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| 139 | |
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| 140 | SPECIFY |
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| 141 | feed.F = 113.4 * "kmol/h"; |
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| 142 | feed.T = 291 * "K"; |
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| 143 | feed.P = 168.3 * "kPa"; |
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| 144 | feed.z = [0.5, 0.5]; |
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| 145 | |
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| 146 | zero.F = 0 * "kmol/h"; |
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| 147 | zero.T = 300 * "K"; |
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| 148 | zero.P = 1 * "atm"; |
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| 149 | zero.z = [0.5, 0.5]; |
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| 150 | zero.v = 0; |
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| 151 | zero.h = 0 * "J/mol"; |
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| 152 | |
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| 153 | cond.F = 68 * "kmol/h"; |
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| 154 | cond.P = 150 * "kPa"; |
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| 155 | cond.T = 281.75 * "K"; |
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| 156 | cond.z = [0.6664, 0.3336]; |
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| 157 | |
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| 158 | reb.F = 153 * "kmol/h"; |
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| 159 | reb.P = 185 * "kPa"; |
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| 160 | reb.T = 328.12 * "K"; |
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| 161 | reb.z = [0.001848, 0.9982]; |
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| 162 | |
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| 163 | sec.trays.Emv = 1; |
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| 164 | |
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| 165 | SET |
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| 166 | sec.NTrays = 8; |
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| 167 | #COLUMN |
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| 168 | sec.trays.V = 4 * "ft^3"; |
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| 169 | sec.trays.Ah = 0.394 * "ft^2"; |
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| 170 | sec.trays.lw = 20.94 * "in"; |
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| 171 | sec.trays.hw = 0.125 * "ft"; |
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| 172 | sec.trays.Q = 0 * "kW"; |
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| 173 | sec.trays.beta = 0.6; |
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| 174 | sec.trays.alfa = 4; |
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| 175 | sec.trays.Ap = 3.94 * "ft^2"; |
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| 176 | |
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| 177 | INITIAL |
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| [19] | 178 | sec.trays.OutletL.T = [290:(330-290)/(sec.NTrays-1):330] *"K"; |
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| [1] | 179 | sec.trays.Level = 0.3 * sec.trays.hw; |
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| 180 | sec.trays.OutletL.z(1) = 0.5; |
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| 181 | |
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| 182 | OPTIONS |
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| [125] | 183 | RelativeAccuracy = 1e-5; |
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| 184 | TimeStep = 1; |
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| 185 | TimeEnd = 100; |
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| [111] | 186 | #guessFile="SectionColumn_Test_with8tray.rlt"; |
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| 187 | #mode = "steady"; |
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| [1] | 188 | end |
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| 189 | |
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| 190 | |
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| 191 | FlowSheet Distillation_kettle_cond_Test |
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| 192 | PARAMETERS |
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| [125] | 193 | PP as Plugin(Brief="Physical Properties",File="vrpp"); |
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| [1] | 194 | NComp as Integer; |
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| 195 | |
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| 196 | VARIABLES |
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| 197 | Qc as heat_rate (Brief="Heat rate removed from condenser"); |
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| 198 | Qr as heat_rate (Brief="Heat rate supplied to reboiler"); |
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| 199 | |
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| 200 | SET |
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| 201 | PP.Components = [ "isobutane", "n-pentane", "propylene", |
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| 202 | "benzene", "isobutene" ]; |
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| 203 | PP.LiquidModel = "PR"; |
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| 204 | PP.VapourModel = "PR"; |
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| 205 | PP.Derivatives = 1; |
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| 206 | NComp = PP.NumberOfComponents; |
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| 207 | |
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| 208 | DEVICES |
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| 209 | col as Distillation_kettle_cond; |
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| [125] | 210 | feed as source; |
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| [1] | 211 | zero as stream; |
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| 212 | |
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| 213 | CONNECTIONS |
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| 214 | feed to col.trays(5).Inlet; |
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| 215 | zero to col.reb.Inlet; |
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| 216 | zero to col.trays([1:4]).Inlet; |
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| 217 | zero to col.trays([6:col.NTrays]).Inlet; |
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| 218 | Qc to col.cond.Q; |
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| 219 | Qr to col.reb.Q; |
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| 220 | |
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| 221 | SPECIFY |
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| [125] | 222 | feed.Outlet.F = 113.4 * "kmol/h"; |
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| 223 | feed.Outlet.T = 291 * "K"; |
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| 224 | feed.Outlet.P = 168.3 * "kPa"; |
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| 225 | feed.Outlet.z = 1/NComp; |
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| [1] | 226 | |
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| 227 | zero.F = 0 * "kmol/h"; |
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| 228 | zero.T = 300 * "K"; |
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| 229 | zero.P = 1 * "atm"; |
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| 230 | zero.z = 1/NComp; |
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| 231 | zero.v = 0; |
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| 232 | zero.h = 0 * "J/mol"; |
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| 233 | |
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| [19] | 234 | col.sptop.Outlet2.F = 85 * "kmol/h"; |
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| [1] | 235 | col.reb.OutletL.F = 28.4 * "kmol/h"; |
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| [19] | 236 | col.sptop.frac = 0.444445; |
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| [1] | 237 | col.cond.OutletV.F = 0 * "kmol/h"; |
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| 238 | Qr = 3.7743e6 * "kJ/h"; |
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| 239 | Qc = -3.71e6 * "kJ/h"; |
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| 240 | col.pump1.dP = 16 * "kPa"; |
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| 241 | col.trays.Emv = 1; |
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| 242 | |
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| 243 | SET |
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| 244 | col.NTrays = 8; |
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| 245 | col.cond.V = 2 * "m^3"; |
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| 246 | col.cond.Across = 1 * "m^2"; |
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| 247 | col.trays.V = 4 * "ft^3"; |
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| 248 | col.trays.Ah = 0.394 * "ft^2"; |
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| 249 | col.trays.lw = 20.94 * "in"; |
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| 250 | col.trays.hw = 0.125 * "ft"; |
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| 251 | col.trays.Q = 0 * "kW"; |
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| 252 | col.trays.beta = 0.6; |
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| 253 | col.trays.alfa = 4; |
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| 254 | col.trays.Ap = 3.94 * "ft^2"; |
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| 255 | col.reb.V = 2 * "m^3"; |
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| 256 | col.reb.Across = 1 * "m^2"; |
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| 257 | |
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| 258 | INITIAL |
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| 259 | # condenser |
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| 260 | col.cond.OutletL.T = 260 *"K"; |
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| 261 | col.cond.Level = 1 * "m"; |
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| 262 | col.cond.OutletL.z([1:4]) = [0.65, 0.05, 0.01, 0.01]; |
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| 263 | |
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| 264 | # reboiler |
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| 265 | col.reb.OutletL.T = 330 *"K"; |
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| 266 | col.reb.Level = 1 * "m"; |
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| 267 | col.reb.OutletL.z([1:4]) = [0.1, 0.7, 0.01, 0.01]; |
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| 268 | |
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| 269 | # column trays |
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| [19] | 270 | col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * "K"; |
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| 271 | col.trays.Level = 1.2 * col.trays.hw; |
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| [1] | 272 | col.trays.OutletL.z([1:4]) = [0.5, 0.05, 0.01, 0.01]; |
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| 273 | |
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| 274 | OPTIONS |
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| [125] | 275 | RelativeAccuracy = 1e-3; |
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| 276 | TimeStep = 0.01; |
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| 277 | TimeEnd = 50; |
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| 278 | #time = [0:0.01:1, 2:50]; |
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| [111] | 279 | #guessFile="Distillation_kettle_cond_Test.rlt"; |
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| 280 | #mode = "steady"; |
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| [1] | 281 | end |
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| [111] | 282 | |
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| 283 | FlowSheet Column_ctrl |
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| 284 | PARAMETERS |
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| [125] | 285 | PP as Plugin(Brief="Physical Properties",File="vrpp"); |
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| [111] | 286 | NComp as Integer; |
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| 287 | |
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| 288 | Qcmin as heat_rate (Brief="Minimum Condenser Heat supplied"); |
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| 289 | Qcmax as heat_rate (Brief="Maximum Condenser Heat supplied"); |
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| 290 | Qrmin as heat_rate (Brief="Minimum Reboiler Heat supplied"); |
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| 291 | Qrmax as heat_rate (Brief="Maximum Reboiler Heat supplied"); |
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| 292 | Frmin as flow_mol (Brief="Minimum bottom flow rate"); |
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| 293 | Frmax as flow_mol (Brief="Maximum bottom flow rate"); |
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| 294 | Fcmin as flow_mol (Brief="Minimum reflux flow rate"); |
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| 295 | Fcmax as flow_mol (Brief="Maximum reflux flow rate"); |
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| 296 | Hmint as length (Brief="Minimum liquid level in top tank"); |
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| 297 | Hmaxt as length (Brief="Maximum liquid level in top tank"); |
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| 298 | Hminb as length (Brief="Minimum liquid level in reboiler"); |
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| 299 | Hmaxb as length (Brief="Maximum liquid level in reboiler"); |
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| 300 | Pmax as pressure (Brief="Maximum column pressure"); |
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| 301 | Pmin as pressure (Brief="Minimum column pressure"); |
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| 302 | Tmax as temperature (Brief="Maximum column temperature"); |
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| 303 | Tmin as temperature (Brief="Minimum column temperature"); |
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| 304 | |
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| 305 | VARIABLES |
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| 306 | Qc as heat_rate (Brief="Heat rate removed from condenser"); |
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| 307 | Qr as heat_rate (Brief="Heat rate supplied to reboiler"); |
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| 308 | Had_top as Real (Brief="Dimensionless condenser level"); |
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| 309 | Had_bot as Real (Brief="Dimensionless reboiler level"); |
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| 310 | Pad as Real (Brief="Dimensionless pressure"); |
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| 311 | Tad as Real (Brief="Dimensionless temperature"); |
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| [112] | 312 | RR as positive (Brief="Reflux ratio"); |
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| 313 | |
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| [111] | 314 | SET |
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| 315 | PP.Components = [ "isobutane", "n-pentane", "propylene", |
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| 316 | "benzene", "isobutene" ]; |
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| 317 | PP.LiquidModel = "PR"; |
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| 318 | PP.VapourModel = "PR"; |
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| 319 | PP.Derivatives = 1; |
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| 320 | NComp = PP.NumberOfComponents; |
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| 321 | |
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| 322 | DEVICES |
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| 323 | col as Distillation_kettle_cond; |
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| [125] | 324 | feed as source; |
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| [111] | 325 | zero as stream; |
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| 326 | TCcond as PIDIncr_Ideal_AW; |
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| 327 | LCtop as PIDIncr_Ideal_AW; |
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| 328 | LCbot as PIDIncr_Ideal_AW; |
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| 329 | PC as PIDIncr_Ideal_AW; |
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| 330 | |
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| 331 | CONNECTIONS |
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| 332 | feed to col.trays(5).Inlet; |
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| 333 | zero to col.reb.Inlet; |
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| 334 | zero to col.trays([1:4]).Inlet; |
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| 335 | zero to col.trays([6:col.NTrays]).Inlet; |
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| 336 | Qc to col.cond.Q; |
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| 337 | Qr to col.reb.Q; |
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| 338 | |
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| 339 | EQUATIONS |
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| 340 | "Temperature Controller" |
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| 341 | TCcond.Parameters.tau = 0*"s"; |
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| 342 | TCcond.Parameters.tauSet = 0*"s"; |
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| 343 | TCcond.Parameters.alpha = 0.3; |
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| 344 | TCcond.Parameters.bias = 0.5; |
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| 345 | TCcond.Parameters.gamma = 1; |
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| 346 | TCcond.Parameters.beta = 1; |
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| 347 | TCcond.Options.action = 1; |
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| 348 | TCcond.Options.clip = 1; |
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| 349 | TCcond.Options.autoMan = 0; |
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| 350 | TCcond.Parameters.intTime = 60*"s"; |
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| 351 | TCcond.Parameters.gain = 0.6; |
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| 352 | TCcond.Parameters.derivTime = 1*"s"; |
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| 353 | TCcond.Ports.setPoint = ((15+273.15) * "K" - Tmin)/(Tmax-Tmin); |
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| 354 | TCcond.Ports.input = Tad; |
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| 355 | Tad = (col.cond.OutletL.T-Tmin)/(Tmax-Tmin); |
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| 356 | Qc = Qcmin+(Qcmax-Qcmin)*TCcond.Ports.output; |
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| 357 | |
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| 358 | "Pressure Controller" |
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| 359 | PC.Parameters.tau = 0*"s"; |
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| 360 | PC.Parameters.tauSet = 0*"s"; |
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| 361 | PC.Parameters.alpha = 0.3; |
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| 362 | PC.Parameters.bias = 0; |
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| 363 | PC.Parameters.gamma = 1; |
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| 364 | PC.Parameters.beta = 1; |
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| 365 | PC.Options.action = -1; |
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| 366 | PC.Options.clip = 1; |
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| 367 | PC.Options.autoMan = 0; |
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| [112] | 368 | PC.Parameters.intTime = 50*"s"; |
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| [111] | 369 | PC.Parameters.gain = 0.5; |
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| 370 | PC.Parameters.derivTime = 1*"s"; |
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| 371 | PC.Ports.setPoint = (2.0*"bar"-Pmin)/(Pmax-Pmin); |
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| 372 | PC.Ports.input = Pad; |
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| 373 | Pad = (col.cond.OutletV.P-Pmin)/(Pmax-Pmin); |
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| 374 | col.cond.OutletV.F = (Fcmin+(Fcmax-Fcmin)*PC.Ports.output); |
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| 375 | |
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| 376 | "Ttop Level Controller" |
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| 377 | LCtop.Parameters.tau = 0*"s"; |
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| 378 | LCtop.Parameters.tauSet = 0*"s"; |
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| 379 | LCtop.Parameters.alpha = 0.3; |
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| 380 | LCtop.Parameters.bias = 0.5; |
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| 381 | LCtop.Parameters.gamma = 1; |
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| 382 | LCtop.Parameters.beta = 1; |
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| 383 | LCtop.Options.action = -1; |
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| 384 | LCtop.Options.clip = 1; |
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| 385 | LCtop.Options.autoMan = 0; |
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| 386 | LCtop.Parameters.intTime = 10*"s"; |
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| 387 | LCtop.Parameters.gain = 1; |
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| 388 | LCtop.Parameters.derivTime = 1*"s"; |
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| 389 | LCtop.Ports.setPoint = (1.0 * "m" - Hmint)/(Hmaxt-Hmint); |
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| 390 | LCtop.Ports.input = Had_top; |
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| 391 | Had_top = (col.cond.Level-Hmint)/(Hmaxt-Hmint); |
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| 392 | col.sptop.Outlet1.F = Fcmin + (Fcmax-Fcmin) * LCtop.Ports.output; |
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| 393 | |
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| 394 | "Tbottom Level Controller" |
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| 395 | LCbot.Parameters.tau = 0*"s"; |
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| 396 | LCbot.Parameters.tauSet = 0*"s"; |
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| 397 | LCbot.Parameters.alpha = 0.3; |
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| 398 | LCbot.Parameters.bias = 0.5; |
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| 399 | LCbot.Parameters.gamma = 1; |
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| 400 | LCbot.Parameters.beta = 1; |
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| 401 | LCbot.Options.action = -1; |
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| 402 | LCbot.Options.clip = 1; |
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| 403 | LCbot.Options.autoMan = 0; |
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| 404 | LCbot.Parameters.intTime = 100*"s"; |
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| 405 | LCbot.Parameters.gain = 1; |
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| 406 | LCbot.Parameters.derivTime = 1*"s"; |
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| 407 | LCbot.Ports.setPoint = (1.0 * "m" - Hminb)/(Hmaxb-Hminb); |
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| 408 | LCbot.Ports.input = Had_bot; |
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| 409 | Had_bot = (col.reb.Level-Hminb)/(Hmaxb-Hminb); |
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| 410 | col.reb.OutletL.F = Frmin + (Frmax-Frmin) * LCbot.Ports.output; |
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| 411 | |
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| [112] | 412 | RR * (col.cond.OutletV.F + col.sptop.Outlet1.F) = col.sptop.Outlet2.F; |
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| 413 | |
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| 414 | if time < 1 * "h" then |
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| 415 | col.sptop.Outlet2.F = 70 * "kmol/h"; # reflux |
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| 416 | else |
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| 417 | col.sptop.Outlet2.F = 85 * "kmol/h"; # reflux |
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| 418 | end |
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| 419 | |
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| [111] | 420 | SPECIFY |
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| [125] | 421 | feed.Outlet.F = 113.4 * "kmol/h"; |
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| 422 | feed.Outlet.T = 291 * "K"; |
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| 423 | feed.Outlet.P = 168.3 * "kPa"; |
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| 424 | feed.Outlet.z = 1/NComp; |
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| [111] | 425 | |
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| 426 | zero.F = 0 * "kmol/h"; |
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| 427 | zero.T = 300 * "K"; |
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| 428 | zero.P = 1 * "atm"; |
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| 429 | zero.z = 1/NComp; |
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| 430 | zero.v = 0; |
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| 431 | zero.h = 0 * "J/mol"; |
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| 432 | |
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| 433 | Qr = 3e6 * "kJ/h"; |
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| 434 | col.pump1.dP = 16 * "kPa"; |
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| 435 | col.trays.Emv = 1; |
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| 436 | |
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| 437 | SET |
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| 438 | col.NTrays = 8; |
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| 439 | col.cond.V = 2 * "m^3"; |
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| 440 | col.cond.Across = 1 * "m^2"; |
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| 441 | col.trays.V = 4 * "ft^3"; |
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| 442 | col.trays.Ah = 0.394 * "ft^2"; |
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| 443 | col.trays.lw = 20.94 * "in"; |
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| 444 | col.trays.hw = 0.125 * "ft"; |
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| 445 | col.trays.Q = 0 * "kW"; |
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| 446 | col.trays.beta = 0.6; |
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| 447 | col.trays.alfa = 4; |
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| 448 | col.trays.Ap = 3.94 * "ft^2"; |
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| 449 | col.reb.V = 2 * "m^3"; |
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| 450 | col.reb.Across = 1 * "m^2"; |
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| 451 | |
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| 452 | Qrmax = 5e6 * "kJ/h"; |
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| 453 | Qrmin = 1e6 * "kJ/h"; |
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| 454 | Frmin = 0 * "kmol/h"; |
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| 455 | Frmax = 60 * "kmol/h"; |
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| 456 | Fcmin = 0 * "kmol/h"; |
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| 457 | Fcmax = 120 * "kmol/h"; |
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| 458 | Hmint = 0 * "m"; |
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| 459 | Hmaxt = 2 * "m"; |
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| 460 | Hminb = 0 * "m"; |
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| 461 | Hmaxb = 2 * "m"; |
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| 462 | Pmin = 0.5 * "bar"; |
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| 463 | Pmax = 4 * "bar"; |
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| 464 | Qcmax = -5e5 * "kJ/h"; |
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| 465 | Qcmin = -5e6 * "kJ/h"; |
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| 466 | Tmax = (30+273.15) * "K"; |
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| 467 | Tmin = (-20+273.15) * "K"; |
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| 468 | |
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| 469 | INITIAL |
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| 470 | # condenser |
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| 471 | col.cond.OutletL.T = 260 *"K"; |
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| 472 | col.cond.Level = 1 * "m"; |
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| 473 | col.cond.OutletL.z([1:4]) = [0.2, 0.2, 0.4, 0.05]; |
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| 474 | |
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| 475 | # reboiler |
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| 476 | col.reb.OutletL.T = 350 *"K"; |
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| 477 | col.reb.Level = 1 * "m"; |
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| 478 | col.reb.OutletL.z([1:4]) = [0.1, 0.4, 0.1, 0.3]; |
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| 479 | |
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| 480 | # column trays |
|---|
| 481 | col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * "K"; |
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| 482 | col.trays.Level = 1.2 * col.trays.hw; |
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| 483 | col.trays.OutletL.z([1:4]) = [0.15, 0.3, 0.25, 0.2]; |
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| 484 | |
|---|
| 485 | OPTIONS |
|---|
| [125] | 486 | RelativeAccuracy = 1e-3; |
|---|
| 487 | TimeStep = 0.01; |
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| 488 | TimeEnd = 2; |
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| 489 | TimeUnit = "h"; |
|---|
| 490 | #time = [0:0.01:0.1, 0.11:0.01:2]*"h"; |
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| [111] | 491 | #initialFile = "Column_ctrl.rlt"; |
|---|
| 492 | #guessFile = "Column_ctrl.rlt"; |
|---|
| 493 | #mode = "steady"; |
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| 494 | end |
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| 495 | |
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