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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