| 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 | * 2. Material balance on a separation train |
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| 17 | *---------------------------------------------------------------------- |
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| 18 | * |
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| 19 | * Description: |
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| 20 | * This problem is part of a collection of 10 representative |
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| 21 | * problems in Chemical Engineering for solution by numerical methods |
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| 22 | * developed for Cutlip (1998). |
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| 23 | * |
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| 24 | * Subject: |
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| 25 | * * Introduction to Chemical Engineering |
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| 26 | * |
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| 27 | * Concepts utilized: |
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| 28 | * Material balances on a steady-state process with no recycle. |
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| 29 | * |
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| 30 | * Numerical method: |
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| 31 | * * Simultaneous linear equations |
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| 32 | * |
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| 33 | * Reference: |
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| 34 | * * CUTLIP et al. A collection of 10 numerical problems in |
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| 35 | * chemical engineering solved by various mathematical software |
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| 36 | * packages. Comp. Appl. in Eng. Education. v. 6, 169-180, 1998. |
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| 37 | * * More informations and a detailed description of all problems |
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| 38 | * is available online in http://www.polymath-software.com/ASEE |
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| 39 | * |
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| 40 | *---------------------------------------------------------------------- |
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| 41 | * Author: Rodolfo Rodrigues |
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| 42 | * GIMSCOP/UFRGS - Group of Integration, Modeling, Simulation, |
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| 43 | * Control, and Optimization of Processes |
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| 44 | * $Id$ |
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| 45 | *--------------------------------------------------------------------*# |
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| 46 | using "types"; |
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| 47 | |
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| 48 | |
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| 49 | |
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| 50 | #*--------------------------------------------------------------------- |
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| 51 | * Model of a stream |
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| 52 | *--------------------------------------------------------------------*# |
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| 53 | Model stream |
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| 54 | PARAMETERS |
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| 55 | outer NComp as Integer (Brief="Number of chemical components", Lower=1); |
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| 56 | |
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| 57 | VARIABLES |
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| 58 | F as flow_mol (Brief="Molar flow rate", DisplayUnit='mol/min'); |
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| 59 | X(NComp)as fraction (Brief="Mole fraction"); |
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| 60 | end |
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| 61 | |
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| 62 | |
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| 63 | #*--------------------------------------------------------------------- |
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| 64 | * Model of a column |
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| 65 | *--------------------------------------------------------------------*# |
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| 66 | Model column |
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| 67 | VARIABLES |
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| 68 | in Feed as stream; |
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| 69 | out Top as stream; |
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| 70 | out Bottom as stream; |
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| 71 | |
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| 72 | EQUATIONS |
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| 73 | "Component balance" |
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| 74 | Feed.F*Feed.X = Top.F*Top.X + Bottom.F*Bottom.X; |
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| 75 | end |
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| 76 | |
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| 77 | |
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| 78 | #*--------------------------------------------------------------------- |
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| 79 | * Array of distillation columns |
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| 80 | *--------------------------------------------------------------------*# |
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| 81 | FlowSheet distillation_columns |
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| 82 | PARAMETERS |
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| 83 | NComp as Integer; |
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| 84 | |
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| 85 | |
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| 86 | VARIABLES |
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| 87 | feed as stream; |
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| 88 | |
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| 89 | |
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| 90 | DEVICES |
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| 91 | column1 as column; # 1 |
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| 92 | column2 as column; # 2 |
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| 93 | column3 as column; # 3 |
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| 94 | |
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| 95 | |
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| 96 | CONNECTIONS |
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| 97 | feed to column1.Feed; |
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| 98 | column1.Top to column2.Feed; |
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| 99 | column1.Bottom to column3.Feed; |
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| 100 | |
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| 101 | |
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| 102 | SET |
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| 103 | NComp = 4; # xylene, styrene, toluene, benzene |
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| 104 | |
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| 105 | |
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| 106 | EQUATIONS |
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| 107 | "Overall balance for #2" |
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| 108 | column2.Feed.F = column2.Top.F + column2.Bottom.F; |
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| 109 | |
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| 110 | "Overall balance for #3" |
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| 111 | column3.Feed.F = column3.Top.F + column3.Bottom.F; |
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| 112 | |
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| 113 | |
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| 114 | SPECIFY |
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| 115 | # Feed to column 1 |
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| 116 | feed.F = 70*'mol/min'; |
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| 117 | feed.X = [0.15, 0.25, 0.40, 0.20]; |
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| 118 | |
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| 119 | # Column 2 |
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| 120 | column2.Top.X = [0.07, 0.04, 0.54, 0.35]; |
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| 121 | column2.Bottom.X = [0.18, 0.24, 0.42, 0.16]; |
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| 122 | |
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| 123 | # Column 3 |
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| 124 | column3.Top.X = [0.15, 0.10, 0.54, 0.21]; |
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| 125 | column3.Bottom.X = [0.24, 0.65, 0.10, 0.01]; |
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| 126 | |
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| 127 | |
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| 128 | OPTIONS |
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| 129 | Dynamic = false; |
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| 130 | end |
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