[574] | 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 | * Model of an yield reactor |
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| 17 | *---------------------------------------------------------------------- |
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| 18 | * |
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| 19 | * Description: |
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| 20 | * Modeling of a reactor based on an yield approach. |
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| 21 | * |
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| 22 | * Assumptions: |
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| 23 | * * single- and two-phases involved |
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| 24 | * * steady-state |
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| 25 | * |
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| 26 | * Specify: |
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| 27 | * * inlet stream |
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| 28 | * * component yield or |
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| 29 | * * reaction yield |
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| 30 | * |
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| 31 | *---------------------------------------------------------------------- |
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| 32 | * Author: Rodolfo Rodrigues |
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| 33 | * $Id$ |
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| 34 | *--------------------------------------------------------------------*# |
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| 35 | |
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| 36 | using "tank_basic"; |
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| 37 | |
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| 38 | |
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| 39 | #*--------------------------------------------------------------------- |
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| 40 | * only vapour phase |
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| 41 | *--------------------------------------------------------------------*# |
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| 42 | Model yield_vap as tank_vap |
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| 43 | ATTRIBUTES |
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| 44 | Pallete = true; |
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| 45 | Icon = "icon/cstr"; |
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| 46 | Brief = "Model of a generic vapour-phase yield CSTR"; |
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| 47 | Info = " |
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| 48 | == Assumptions == |
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| 49 | * only vapour-phase |
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| 50 | * steady-state |
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| 51 | |
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| 52 | == Specify == |
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| 53 | * inlet stream |
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| 54 | * component yield or |
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| 55 | * reaction yield |
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| 56 | "; |
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| 57 | |
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| 58 | PARAMETERS |
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| 59 | NReac as Integer (Brief="Number of reactions", Default=1); |
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| 60 | KComp as Integer (Brief="Key component", Lower=1, Default=1); |
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| 61 | |
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| 62 | VARIABLES |
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| 63 | out Outlet as vapour_stream(Brief="Outlet stream", PosX=1, PosY=1, Symbol="_{out}"); |
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| 64 | rate(NComp) as reaction_mol (Brief="Overall component rate of reaction"); |
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| 65 | conv(NComp) as Real (Brief="Fractional conversion of component", Symbol="X", Default=0); |
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| 66 | |
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| 67 | yield(NComp) as Real (Brief="Molar component yield (global)", Symbol="Y_G"); |
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| 68 | yield_(NComp) as Real (Brief="Molar reaction yield (instantaneous)", Symbol="Y_I"); |
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| 69 | |
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| 70 | EQUATIONS |
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| 71 | "Outlet stream" |
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| 72 | Outlet.F*Outlet.z = Outletm.F*Outletm.z + rate*Tank.V; |
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| 73 | |
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| 74 | "Rate of reaction" |
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| 75 | rate*Tank.V = Outletm.F*(yield/(1 + yield(KComp))*Outletm.z(KComp) - Outletm.z); |
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| 76 | |
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| 77 | "Instantaneous yield" |
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| 78 | rate = yield_*rate(KComp); |
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| 79 | |
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| 80 | "Mechanical equilibrium" |
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| 81 | Outlet.P = Outletm.P; |
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| 82 | |
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| 83 | "Energy balance" |
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| 84 | Outlet.F*Outlet.h = Outletm.F*Outletm.h; |
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| 85 | |
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| 86 | for i in [1:NComp] do |
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| 87 | if (Outletm.z(i) > 1e-16) then |
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| 88 | "Molar conversion" |
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| 89 | Outlet.F*Outlet.z(i) = Outletm.F*Outletm.z(i)*(1 - conv(i)); |
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| 90 | else if (Outlet.z(i) > 0) then |
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| 91 | "Molar conversion" |
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| 92 | conv(i) = 1; # ? |
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| 93 | else |
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| 94 | "Molar conversion" |
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| 95 | conv(i) = 0; # ? |
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| 96 | end |
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| 97 | end |
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| 98 | end |
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| 99 | end |
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| 100 | |
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| 101 | |
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| 102 | #*--------------------------------------------------------------------- |
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| 103 | * only liquid phase |
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| 104 | *--------------------------------------------------------------------*# |
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| 105 | Model yield_liq as tank_liq |
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| 106 | ATTRIBUTES |
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| 107 | Pallete = true; |
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| 108 | Icon = "icon/cstr"; |
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| 109 | Brief = "Model of a generic liquid-phase yield CSTR"; |
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| 110 | Info = " |
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| 111 | == Assumptions == |
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| 112 | * only liquid-phase |
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| 113 | * steady-state |
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| 114 | |
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| 115 | == Specify == |
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| 116 | * inlet stream |
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| 117 | * component yield or |
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| 118 | * reaction yield |
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| 119 | "; |
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| 120 | |
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| 121 | PARAMETERS |
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| 122 | NReac as Integer (Brief="Number of reactions", Default=1); |
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| 123 | KComp as Integer (Brief="Key component", Lower=1, Default=1); |
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| 124 | |
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| 125 | VARIABLES |
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| 126 | out Outlet as liquid_stream(Brief="Outlet stream", PosX=1, PosY=1, Symbol="_{out}"); |
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| 127 | rate(NComp) as reaction_mol (Brief="Overall component rate of reaction"); |
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| 128 | conv(NComp) as Real (Brief="Fractional conversion of component", Symbol="X", Default=0); |
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| 129 | |
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| 130 | yield(NComp) as Real (Brief="Molar component yield (global)", Symbol="Y_G"); |
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| 131 | yield_(NComp) as Real (Brief="Molar reaction yield (instantaneous)", Symbol="Y_I"); |
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| 132 | |
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| 133 | EQUATIONS |
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| 134 | "Outlet stream" |
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| 135 | Outlet.F*Outlet.z = Outletm.F*Outletm.z + rate*Tank.V; |
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| 136 | |
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| 137 | "Rate of reaction" |
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| 138 | rate*Tank.V = Outletm.F*(yield/(1 + yield(KComp))*Outletm.z(KComp) - Outletm.z); |
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| 139 | |
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| 140 | "Molar reaction yield" |
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| 141 | rate = yield_*rate(KComp); |
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| 142 | |
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| 143 | "Mechanical equilibrium" |
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| 144 | Outlet.P = Outletm.P; |
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| 145 | |
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| 146 | "Energy balance" |
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| 147 | Outlet.F*Outlet.h = Outletm.F*Outletm.h; |
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| 148 | |
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| 149 | for i in [1:NComp] do |
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| 150 | if (Outletm.z(i) > 0) then |
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| 151 | "Molar conversion" |
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| 152 | Outlet.F*Outlet.z(i) = Outletm.F*Outletm.z(i)*(1 - conv(i)); |
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| 153 | else if (Outlet.z(i) > 0) then |
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| 154 | "Molar conversion" |
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| 155 | conv(i) = 1; # ? |
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| 156 | else |
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| 157 | "Molar conversion" |
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| 158 | conv(i) = 0; # ? |
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| 159 | end |
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| 160 | end |
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| 161 | end |
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| 162 | end |
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