[881] | 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 | * Author: Paula B. Staudt |
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| 17 | * $Id: condenser.mso 555 2008-07-18 19:01:13Z rafael $ |
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| 18 | *--------------------------------------------------------------------*# |
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| 19 | |
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| 20 | using "tank"; |
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| 21 | |
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| 22 | Model condenserSteady |
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| 23 | |
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| 24 | ATTRIBUTES |
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| 25 | Pallete = true; |
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| 26 | Icon = "icon/CondenserSteady"; |
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| 27 | Brief = "Model of a Steady State condenser with no thermodynamics equilibrium."; |
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| 28 | Info = |
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| 29 | "== ASSUMPTIONS == |
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| 30 | * perfect mixing of both phases; |
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| 31 | * no thermodynamics equilibrium. |
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| 32 | |
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| 33 | == SET == |
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| 34 | * the pressure drop in the condenser; |
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| 35 | |
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| 36 | == SPECIFY == |
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| 37 | * the InletVapour stream; |
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| 38 | * the InletQ (the model requires an energy stream, also you can use a controller for setting the heat duty using the heat_flow model). |
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| 39 | |
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| 40 | == OPTIONAL == |
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| 41 | * the condenser model has two control ports |
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| 42 | ** TI OutletLiquid Temperature Indicator; |
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| 43 | ** PI OutletLiquid Pressure Indicator; |
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| 44 | "; |
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| 45 | |
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| 46 | PARAMETERS |
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| 47 | outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); |
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| 48 | outer NComp as Integer (Brief = "Number of Components"); |
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| 49 | |
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| 50 | Pdrop as press_delta (Brief="Pressure Drop in the condenser",Default=0, Symbol="\Delta _P"); |
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| 51 | |
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| 52 | VARIABLES |
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| 53 | in InletVapour as stream (Brief="Vapour inlet stream", PosX=0.16, PosY=0, Symbol="_{in}^{Vapour}"); |
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| 54 | out OutletLiquid as liquid_stream (Brief="Liquid outlet stream", PosX=0.53, PosY=1, Symbol="_{out}^{Liquid}"); |
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| 55 | in InletQ as power (Brief="Heat Duty", PosX=1, PosY=0.08, Symbol="Q_{in}",Protected=true); |
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| 56 | |
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| 57 | Tbubble as temperature (Brief ="Bubble Temperature",Protected=true, Symbol ="T_{bubble}"); |
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| 58 | Deg_Subcooled as temp_delta (Brief ="Degrees subcooled",Symbol ="\Delta T_{subcooled}"); |
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| 59 | |
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| 60 | out TI as control_signal (Brief="Temperature Indicator of Condenser", Protected = true, PosX=0.50, PosY=0); |
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| 61 | out PI as control_signal (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.32, PosY=0); |
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| 62 | |
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| 63 | EQUATIONS |
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| 64 | |
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| 65 | "Molar Flow Balance" |
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| 66 | InletVapour.F = OutletLiquid.F; |
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| 67 | |
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| 68 | "Molar Composition Balance" |
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| 69 | InletVapour.z = OutletLiquid.z; |
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| 70 | |
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| 71 | "Energy Balance" |
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| 72 | InletVapour.F*InletVapour.h + InletQ = OutletLiquid.F*OutletLiquid.h; |
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| 73 | |
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| 74 | "Pressure Drop" |
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| 75 | OutletLiquid.P = InletVapour.P - Pdrop; |
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| 76 | |
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| 77 | "Bubble Temperature" |
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| 78 | Tbubble = PP.BubbleT(OutletLiquid.P,OutletLiquid.z); |
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| 79 | |
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| 80 | "Temperature" |
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| 81 | OutletLiquid.T = Tbubble-Deg_Subcooled; |
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| 82 | |
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| 83 | "Temperature indicator" |
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| 84 | TI * 'K' = OutletLiquid.T; |
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| 85 | |
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| 86 | "Pressure indicator" |
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| 87 | PI * 'atm' = OutletLiquid.P; |
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| 88 | |
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| 89 | end |
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| 90 | |
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| 91 | Model condenserSteady_fakeH |
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| 92 | |
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| 93 | ATTRIBUTES |
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| 94 | Pallete = true; |
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| 95 | Icon = "icon/CondenserSteady"; |
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| 96 | Brief = "Model of a Steady State condenser with fake calculation of outlet conditions."; |
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| 97 | Info = |
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| 98 | "Model of a Steady State condenser with fake calculation of output temperature, but with a real |
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| 99 | calculation of the output stream enthalpy. |
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| 100 | |
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| 101 | == ASSUMPTIONS == |
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| 102 | * perfect mixing of both phases; |
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| 103 | * no thermodynamics equilibrium. |
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| 104 | |
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| 105 | == SET == |
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| 106 | * the fake Outlet temperature ; |
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| 107 | * the pressure drop in the condenser; |
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| 108 | |
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| 109 | == SPECIFY == |
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| 110 | * the InletVapour stream; |
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| 111 | * the InletQ (the model requires an energy stream, also you can use a controller for setting the heat duty using the heat_flow model). |
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| 112 | |
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| 113 | == OPTIONAL == |
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| 114 | * the condenser model has two control ports |
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| 115 | ** TI OutletLiquid Temperature Indicator; |
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| 116 | ** PI OutletLiquid Pressure Indicator; |
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| 117 | "; |
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| 118 | |
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| 119 | PARAMETERS |
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| 120 | outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); |
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| 121 | outer NComp as Integer (Brief = "Number of Components"); |
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| 122 | |
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| 123 | Pdrop as press_delta (Brief="Pressure Drop in the condenser",Default=0, Symbol="\Delta _P"); |
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| 124 | Fake_Temperature as temperature (Brief="Fake temperature", Symbol = "T_{fake}"); |
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| 125 | |
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| 126 | |
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| 127 | VARIABLES |
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| 128 | in InletVapour as stream (Brief="Vapour inlet stream", PosX=0.16, PosY=0, Symbol="_{in}^{Vapour}"); |
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| 129 | out OutletLiquid as stream (Brief="Liquid outlet stream", PosX=0.53, PosY=1, Symbol="_{out}^{Liquid}"); |
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| 130 | in InletQ as power (Brief="Heat Duty", PosX=1, PosY=0.08, Symbol="Q_{in}",Protected=true); |
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| 131 | |
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| 132 | out TI as control_signal (Brief="Temperature Indicator of Condenser", Protected = true, PosX=0.50, PosY=0); |
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| 133 | out PI as control_signal (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.32, PosY=0); |
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| 134 | |
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| 135 | EQUATIONS |
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| 136 | |
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| 137 | "Molar Flow Balance" |
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| 138 | InletVapour.F = OutletLiquid.F; |
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| 139 | |
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| 140 | "Molar Composition Balance" |
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| 141 | InletVapour.z = OutletLiquid.z; |
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| 142 | |
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| 143 | "Energy Balance" |
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| 144 | InletVapour.F*InletVapour.h + InletQ = OutletLiquid.F*OutletLiquid.h; |
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| 145 | |
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| 146 | "Pressure Drop" |
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| 147 | OutletLiquid.P = InletVapour.P - Pdrop; |
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| 148 | |
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| 149 | "Fake Temperature" |
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| 150 | OutletLiquid.T = Fake_Temperature; |
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| 151 | |
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| 152 | "Vapourisation Fraction" |
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| 153 | OutletLiquid.v = 0; |
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| 154 | |
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| 155 | "Temperature indicator" |
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| 156 | TI * 'K' = OutletLiquid.T; |
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| 157 | |
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| 158 | "Pressure indicator" |
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| 159 | PI * 'atm' = OutletLiquid.P; |
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| 160 | |
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| 161 | end |
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| 162 | |
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| 163 | Model condenserReact |
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| 164 | ATTRIBUTES |
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| 165 | Pallete = false; |
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| 166 | Icon = "icon/Condenser"; |
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| 167 | Brief = "Model of a Condenser with reaction in liquid phase."; |
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| 168 | Info = |
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| 169 | "== Assumptions == |
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| 170 | * perfect mixing of both phases; |
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| 171 | * thermodynamics equilibrium; |
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| 172 | * the reaction only takes place in liquid phase. |
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| 173 | |
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| 174 | == Specify == |
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| 175 | * the reaction related variables; |
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| 176 | * the inlet stream; |
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| 177 | * the outlet flows: OutletVapour.F and OutletLiquid.F; |
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| 178 | * the heat supply. |
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| 179 | |
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| 180 | == Initial Conditions == |
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| 181 | * the condenser temperature (OutletLiquid.T); |
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| 182 | * the condenser liquid level (Level); |
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| 183 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions. |
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| 184 | "; |
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| 185 | |
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| 186 | PARAMETERS |
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| 187 | outer PP as Plugin(Type="PP"); |
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| 188 | outer NComp as Integer; |
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| 189 | |
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| 190 | V as volume (Brief="Condenser total volume"); |
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| 191 | Across as area (Brief="Cross Section Area of reboiler"); |
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| 192 | |
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| 193 | stoic(NComp) as Real (Brief="Stoichiometric matrix"); |
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| 194 | Hr as energy_mol; |
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| 195 | Initial_Level as length (Brief="Initial Level of liquid phase"); |
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| 196 | Initial_Temperature as temperature (Brief="Initial Temperature of Condenser"); |
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| 197 | Initial_Composition(NComp) as fraction (Brief="Initial Liquid Composition"); |
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| 198 | |
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| 199 | VARIABLES |
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| 200 | |
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| 201 | in InletVapour as stream (Brief="Vapour inlet stream", PosX=0.1164, PosY=0, Symbol="_{inV}"); |
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| 202 | out OutletLiquid as liquid_stream (Brief="Liquid outlet stream", PosX=0.4513, PosY=1, Symbol="_{outL}"); |
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| 203 | out OutletVapour as vapour_stream (Brief="Vapour outlet stream", PosX=0.4723, PosY=0, Symbol="_{outV}"); |
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| 204 | InletQ as power (Brief="Cold supplied", PosX=1, PosY=0.6311, Symbol="_{in}"); |
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| 205 | |
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| 206 | M(NComp) as mol (Brief="Molar Holdup in the tray"); |
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| 207 | ML as mol (Brief="Molar liquid holdup"); |
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| 208 | MV as mol (Brief="Molar vapour holdup"); |
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| 209 | E as energy (Brief="Total Energy Holdup on tray"); |
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| 210 | vL as volume_mol (Brief="Liquid Molar Volume"); |
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| 211 | vV as volume_mol (Brief="Vapour Molar volume"); |
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| 212 | Level as length (Brief="Level of liquid phase"); |
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| 213 | Vol as volume; |
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| 214 | r3 as reaction_mol (Brief="Reaction Rates", DisplayUnit = 'mol/l/s'); |
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| 215 | C(NComp) as conc_mol (Brief="Molar concentration", Lower = -1); |
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| 216 | |
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| 217 | INITIAL |
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| 218 | |
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| 219 | Level = Initial_Level; |
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| 220 | OutletLiquid.T = Initial_Temperature; |
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| 221 | OutletLiquid.z(1:NComp-1) = Initial_Composition(1:NComp-1)/sum(Initial_Composition); |
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| 222 | |
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| 223 | EQUATIONS |
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| 224 | "Molar Concentration" |
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| 225 | OutletLiquid.z = vL * C; |
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| 226 | |
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| 227 | "Reaction" |
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| 228 | r3 = exp(-7150*'K'/OutletLiquid.T)*(4.85e4*C(1)*C(2) - 1.23e4*C(3)*C(4)) * 'l/mol/s'; |
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| 229 | |
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| 230 | "Component Molar Balance" |
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| 231 | diff(M) = InletVapour.F*InletVapour.z - OutletLiquid.F*OutletLiquid.z - OutletVapour.F*OutletVapour.z + stoic*r3*ML*vL; |
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| 232 | |
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| 233 | "Energy Balance" |
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| 234 | diff(E) = InletVapour.F*InletVapour.h - OutletLiquid.F*OutletLiquid.h- OutletVapour.F*OutletVapour.h + InletQ + Hr * r3 * ML*vL; |
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| 235 | |
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| 236 | "Molar Holdup" |
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| 237 | M = ML*OutletLiquid.z + MV*OutletVapour.z; |
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| 238 | |
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| 239 | "Energy Holdup" |
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| 240 | E = ML*OutletLiquid.h + MV*OutletVapour.h - OutletVapour.P*V; |
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| 241 | |
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| 242 | "Mol fraction normalisation" |
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| 243 | sum(OutletLiquid.z)=1.0; |
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| 244 | |
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| 245 | "Liquid Volume" |
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| 246 | vL = PP.LiquidVolume(OutletLiquid.T, OutletLiquid.P, OutletLiquid.z); |
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| 247 | |
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| 248 | "Vapour Volume" |
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| 249 | vV = PP.VapourVolume(OutletVapour.T, OutletVapour.P, OutletVapour.z); |
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| 250 | |
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| 251 | "Thermal Equilibrium" |
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| 252 | OutletLiquid.T = OutletVapour.T; |
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| 253 | |
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| 254 | "Mechanical Equilibrium" |
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| 255 | OutletVapour.P = OutletLiquid.P; |
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| 256 | |
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| 257 | "Geometry Constraint" |
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| 258 | V = ML*vL + MV*vV; |
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| 259 | |
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| 260 | Vol = ML*vL; |
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| 261 | |
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| 262 | "Level of liquid phase" |
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| 263 | Level = ML*vL/Across; |
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| 264 | |
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| 265 | "Chemical Equilibrium" |
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| 266 | PP.LiquidFugacityCoefficient(OutletLiquid.T, OutletLiquid.P, OutletLiquid.z)*OutletLiquid.z = |
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| 267 | PP.VapourFugacityCoefficient(OutletVapour.T, OutletVapour.P, OutletVapour.z)*OutletVapour.z; |
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| 268 | |
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| 269 | sum(OutletLiquid.z)=sum(OutletVapour.z); |
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| 270 | |
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| 271 | end |
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| 272 | |
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| 273 | Model condenser |
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| 274 | |
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| 275 | ATTRIBUTES |
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| 276 | Pallete = true; |
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| 277 | Icon = "icon/Condenser"; |
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| 278 | Brief = "Model of a dynamic condenser with control."; |
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| 279 | Info = |
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| 280 | "== ASSUMPTIONS == |
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| 281 | * perfect mixing of both phases; |
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| 282 | * thermodynamics equilibrium. |
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| 283 | |
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| 284 | == SPECIFY == |
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| 285 | * the InletVapour stream; |
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| 286 | * the outlet flows: OutletVapour.F and OutletLiquid.F; |
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| 287 | * the InletQ (the model requires an energy stream, also you can use a controller for setting the heat duty using the heat_flow model). |
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| 288 | |
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| 289 | == OPTIONAL == |
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| 290 | * the condenser model has three control ports |
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| 291 | ** TI OutletLiquid Temperature Indicator; |
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| 292 | ** PI OutletLiquid Pressure Indicator; |
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| 293 | ** LI Level Indicator of Condenser; |
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| 294 | |
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| 295 | == INITIAL CONDITIONS == |
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| 296 | * Initial_Temperature : the condenser temperature (OutletLiquid.T); |
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| 297 | * Levelpercent_Initial : the condenser liquid level in percent (LI); |
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| 298 | * Initial_Composition : (NoComps) OutletLiquid compositions. |
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| 299 | "; |
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| 300 | |
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| 301 | PARAMETERS |
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| 302 | outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); |
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| 303 | outer NComp as Integer (Brief="Number of Components"); |
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| 304 | |
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| 305 | Mw(NComp) as molweight (Brief = "Component Mol Weight",Hidden=true); |
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| 306 | low_flow as flow_mol (Brief = "Low Flow",Default = 1E-6, Hidden=true); |
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| 307 | zero_flow as flow_mol (Brief = "No Flow",Default = 0, Hidden=true); |
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| 308 | KfConst as area (Brief="Constant for K factor pressure drop", Default = 1, Hidden=true); |
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| 309 | |
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| 310 | VapourFlow as Switcher (Brief="Vapour Flow", Valid = ["on", "off"], Default = "on",Hidden=true); |
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| 311 | |
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| 312 | Kfactor as positive (Brief="K factor for pressure drop", Lower = 1E-8, Default = 1E-3); |
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| 313 | |
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| 314 | Levelpercent_Initial as positive (Brief="Initial liquid height in Percent", Default = 0.70); |
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| 315 | Initial_Temperature as temperature (Brief="Initial Temperature of Condenser"); |
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| 316 | Initial_Composition(NComp) as positive (Brief="Initial Liquid Composition", Lower=1E-6); |
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| 317 | |
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| 318 | VARIABLES |
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| 319 | |
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| 320 | Geometry as VesselVolume (Brief="Vessel Geometry", Symbol=" "); |
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| 321 | |
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| 322 | in InletVapour as stream (Brief="Vapour inlet stream", PosX=0.13, PosY=0, Symbol="_{in}^{Vapour}"); |
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| 323 | out OutletLiquid as liquid_stream (Brief="Liquid outlet stream", PosX=0.35, PosY=1, Symbol="_{out}^{Liquid}"); |
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| 324 | out OutletVapour as vapour_stream (Brief="Vapour outlet stream", PosX=0.54, PosY=0, Symbol="_{out}^{Vapour}"); |
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| 325 | in InletQ as power (Brief="Heat supplied", Protected = true, PosX=1, PosY=0.08, Symbol="Q_{in}"); |
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| 326 | |
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| 327 | out TI as control_signal (Brief="Temperature Indicator of Condenser", Protected = true, PosX=0.33, PosY=0); |
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| 328 | out LI as control_signal (Brief="Level Indicator of Condenser", Protected = true, PosX=0.43, PosY=0); |
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| 329 | out PI as control_signal (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.25, PosY=0); |
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| 330 | |
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| 331 | M(NComp) as mol (Brief="Molar Holdup in the tray", Protected = true); |
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| 332 | ML as mol (Brief="Molar liquid holdup", Protected = true); |
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| 333 | MV as mol (Brief="Molar vapour holdup", Protected = true); |
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| 334 | E as energy (Brief="Total Energy Holdup on tray", Protected = true); |
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| 335 | vL as volume_mol (Brief="Liquid Molar Volume", Protected = true); |
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| 336 | vV as volume_mol (Brief="Vapour Molar volume", Protected = true); |
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| 337 | rho as dens_mass (Brief ="Inlet Vapour Mass Density",Hidden=true, Symbol ="\rho"); |
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| 338 | Pdrop as press_delta (Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P", Protected=true); |
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| 339 | |
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| 340 | SET |
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| 341 | Mw = PP.MolecularWeight(); |
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| 342 | low_flow = 1E-6 * 'kmol/h'; |
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| 343 | zero_flow = 0 * 'kmol/h'; |
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| 344 | KfConst = 1*'m^2'; |
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| 345 | |
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| 346 | INITIAL |
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| 347 | |
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| 348 | "Initial level Percent" |
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| 349 | LI = Levelpercent_Initial; |
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| 350 | |
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| 351 | "Initial Temperature" |
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| 352 | OutletLiquid.T = Initial_Temperature; |
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| 353 | |
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| 354 | "Initial Composition" |
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| 355 | OutletLiquid.z(1:NComp-1) = Initial_Composition(1:NComp-1)/sum(Initial_Composition); |
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| 356 | |
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| 357 | EQUATIONS |
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| 358 | |
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| 359 | switch VapourFlow |
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| 360 | |
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| 361 | case "on": |
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| 362 | InletVapour.F*sum(Mw*InletVapour.z) = Kfactor *sqrt(Pdrop*rho)*KfConst; |
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| 363 | |
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| 364 | when InletVapour.F < low_flow switchto "off"; |
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| 365 | |
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| 366 | case "off": |
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| 367 | InletVapour.F = zero_flow; |
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| 368 | |
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| 369 | when InletVapour.P > OutletLiquid.P switchto "on"; |
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| 370 | |
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| 371 | end |
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| 372 | |
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| 373 | "Component Molar Balance" |
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| 374 | diff(M) = InletVapour.F*InletVapour.z - OutletLiquid.F*OutletLiquid.z- OutletVapour.F*OutletVapour.z; |
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| 375 | |
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| 376 | "Energy Balance" |
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| 377 | diff(E) = InletVapour.F*InletVapour.h - OutletLiquid.F*OutletLiquid.h- OutletVapour.F*OutletVapour.h + InletQ; |
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| 378 | |
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| 379 | "Molar Holdup" |
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| 380 | M = ML*OutletLiquid.z + MV*OutletVapour.z; |
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| 381 | |
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| 382 | "Energy Holdup" |
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| 383 | E = ML*OutletLiquid.h + MV*OutletVapour.h - OutletVapour.P*Geometry.Vtotal; |
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| 384 | |
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| 385 | "Mol fraction normalisation" |
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| 386 | sum(OutletLiquid.z)=1.0; |
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| 387 | |
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| 388 | "Mol fraction Constraint" |
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| 389 | sum(OutletLiquid.z)=sum(OutletVapour.z); |
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| 390 | |
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| 391 | "Liquid Volume" |
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| 392 | vL = PP.LiquidVolume(OutletLiquid.T, OutletLiquid.P, OutletLiquid.z); |
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| 393 | |
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| 394 | "Vapour Volume" |
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| 395 | vV = PP.VapourVolume(OutletVapour.T, OutletVapour.P, OutletVapour.z); |
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| 396 | |
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| 397 | "Inlet Vapour Density" |
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| 398 | rho = PP.VapourDensity(InletVapour.T, InletVapour.P, InletVapour.z); |
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| 399 | |
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| 400 | "Chemical Equilibrium" |
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| 401 | PP.LiquidFugacityCoefficient(OutletLiquid.T, OutletLiquid.P, OutletLiquid.z)*OutletLiquid.z = |
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| 402 | PP.VapourFugacityCoefficient(OutletVapour.T, OutletVapour.P, OutletVapour.z)*OutletVapour.z; |
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| 403 | |
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| 404 | "Thermal Equilibrium" |
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| 405 | OutletLiquid.T = OutletVapour.T; |
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| 406 | |
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| 407 | "Mechanical Equilibrium" |
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| 408 | OutletVapour.P = OutletLiquid.P; |
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| 409 | |
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| 410 | "Pressure Drop" |
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| 411 | OutletLiquid.P = InletVapour.P - Pdrop; |
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| 412 | |
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| 413 | "Geometry Constraint" |
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| 414 | Geometry.Vtotal = ML*vL + MV*vV; |
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| 415 | |
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| 416 | "Liquid Level" |
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| 417 | ML * vL = Geometry.Vfilled; |
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| 418 | |
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| 419 | "Temperature indicator" |
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| 420 | TI * 'K' = OutletLiquid.T; |
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| 421 | |
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| 422 | "Pressure indicator" |
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| 423 | PI * 'atm' = OutletLiquid.P; |
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| 424 | |
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| 425 | "Level indicator" |
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| 426 | LI*Geometry.Vtotal= Geometry.Vfilled; |
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| 427 | |
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| 428 | end |
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| 429 | |
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| 430 | |
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| 431 | Model condenserSubcooled |
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| 432 | |
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| 433 | ATTRIBUTES |
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| 434 | Pallete = true; |
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| 435 | Icon = "icon/CondenserSteady"; |
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| 436 | Brief = "Model of a Steady State total condenser with specified temperature outlet conditions."; |
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| 437 | Info = |
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| 438 | "A simple model of a simple Steady State total condenser with specified temperature (or subcooling degree), with a real |
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| 439 | calculation of the output stream enthalpy. |
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| 440 | |
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| 441 | == ASSUMPTIONS == |
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| 442 | * perfect mixing of both phases; |
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| 443 | * saturated vapour at the Inlet. |
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| 444 | * no thermodynamics equilibrium. |
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| 445 | |
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| 446 | == SET == |
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| 447 | * the fake Outlet temperature ; |
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| 448 | * the pressure drop in the condenser; |
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| 449 | |
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| 450 | == SPECIFY == |
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| 451 | * the InletVapour stream; |
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| 452 | * the subcooled temperature OR the the degree of subcooling. |
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| 453 | |
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| 454 | == OPTIONAL == |
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| 455 | * the condenser model has two control ports |
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| 456 | ** TI OutletLiquid Temperature Indicator; |
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| 457 | ** PI OutletLiquid Pressure Indicator; |
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| 458 | "; |
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| 459 | |
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| 460 | PARAMETERS |
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| 461 | outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); |
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| 462 | outer NComp as Integer (Brief = "Number of Components"); |
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| 463 | |
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| 464 | Pdrop as press_delta (Brief="Pressure Drop in the condenser",Default=0, Symbol="\Delta _P"); |
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| 465 | #Fake_Temperature as temperature (Brief="Fake temperature", Symbol = "T_{fake}"); |
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| 466 | |
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| 467 | |
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| 468 | VARIABLES |
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| 469 | in InletVapour as stream (Brief="Vapour inlet stream", PosX=0.16, PosY=0, Symbol="_{in}^{Vapour}"); |
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| 470 | out OutletLiquid as stream (Brief="Liquid outlet stream", PosX=0.53, PosY=1, Symbol="_{out}^{Liquid}"); |
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| 471 | #in InletQ as power (Brief="Heat Duty", PosX=1, PosY=0.08, Symbol="Q_{in}",Protected=true); |
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| 472 | T_sub as temperature (Brief="Condensate temperature (subcooled)", Symbol = "T_{sub}"); |
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| 473 | SubcoolingDegree as temp_delta (Brief="Subcooling Degree", Symbol = "\Delta _{sub}"); |
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[882] | 474 | CondenserDuty as power (Brief="Calculated condenser duty for desired subcooling", Protected = true, Symbol = "Q_{cond}"); |
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[881] | 475 | |
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| 476 | out TI as control_signal (Brief="Temperature Indicator of Condenser", Protected = true, PosX=0.50, PosY=0); |
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| 477 | out PI as control_signal (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.32, PosY=0); |
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| 478 | |
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| 479 | EQUATIONS |
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| 480 | |
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| 481 | "Molar Flow Balance" |
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| 482 | InletVapour.F = OutletLiquid.F; |
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| 483 | |
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| 484 | "Molar Composition Balance" |
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| 485 | InletVapour.z = OutletLiquid.z; |
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| 486 | |
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| 487 | #"Energy Balance" |
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| 488 | #InletVapour.F*InletVapour.h + InletQ = OutletLiquid.F*OutletLiquid.h; |
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| 489 | |
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| 490 | "Pressure Drop" |
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| 491 | OutletLiquid.P = InletVapour.P - Pdrop; |
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| 492 | |
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| 493 | "Subcooled Temperature" |
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| 494 | OutletLiquid.T = T_sub; |
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| 495 | |
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| 496 | "Degree of subcooling" |
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| 497 | SubcoolingDegree = InletVapour.T - T_sub; |
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| 498 | |
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| 499 | "Liquid enthalpy" |
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| 500 | OutletLiquid.h = PP.LiquidEnthalpy(OutletLiquid.T, OutletLiquid.P, OutletLiquid.z); |
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| 501 | |
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| 502 | "Condenser Duty" |
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| 503 | CondenserDuty = OutletLiquid.F*OutletLiquid.h - InletVapour.F*InletVapour.h; |
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| 504 | |
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| 505 | "Vapourisation Fraction" |
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| 506 | OutletLiquid.v = 0; |
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| 507 | |
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| 508 | "Temperature indicator" |
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| 509 | TI * 'K' = OutletLiquid.T; |
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| 510 | |
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| 511 | "Pressure indicator" |
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| 512 | PI * 'atm' = OutletLiquid.P; |
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| 513 | |
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| 514 | end |
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| 515 | |
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