| 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 | * File containg user models of columns |
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| 17 | * |
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| 18 | * |
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| 19 | * The default nomenclature is: |
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| 20 | * Type_Column_reboilertype_condensertyper |
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| 21 | * |
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| 22 | * where: |
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| 23 | * Type = refluxed or reboiled or section |
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| 24 | * Column = Stripping, Absorption, Rectifier, Distillation |
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| 25 | * Reboiler type (if exists) = kettle or thermosyphon |
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| 26 | * Condenser type (if exists) = with subccoling or without subcooling |
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| 27 | * |
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| 28 | *----------------------------------------------------------------------- |
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| 29 | * Author: Based on Models written by Paula B. Staudt |
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| 30 | * $Id$ |
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| 31 | *---------------------------------------------------------------------*# |
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| 32 | |
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| 33 | using "UserTray"; |
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| 34 | using "stage_separators/reboiler"; |
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| 35 | using "stage_separators/condenser"; |
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| 36 | using "mixers_splitters/splitter"; |
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| 37 | using "stage_separators/tank"; |
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| 38 | using "pressure_changers/pump"; |
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| 39 | |
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| 40 | # The complete documentation for these models needs to be updated !!! |
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| 41 | |
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| 42 | #*---------------------------------------------------------------------- |
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| 43 | * Model of a basic column section with: |
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| 44 | * - NumberOfTrays=number of trays. |
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| 45 | * |
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| 46 | *---------------------------------------------------------------------*# |
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| 47 | Model User_Section_ColumnBasic |
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| 48 | |
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| 49 | ATTRIBUTES |
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| 50 | Pallete = false; |
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| 51 | Icon = "icon/SectionColumn"; |
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| 52 | Brief = "Model of a column section."; |
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| 53 | Info = |
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| 54 | "== Model of a column section containing == |
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| 55 | * NumberOfTrays trays. |
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| 56 | |
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| 57 | == Specify == |
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| 58 | * the feed stream of each tray (Inlet); |
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| 59 | * the Murphree eficiency for each tray Emv; |
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| 60 | * the InletL stream of the top tray; |
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| 61 | * the InletV stream of the bottom tray. |
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| 62 | |
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| 63 | == Initial Conditions == |
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| 64 | * the trays temperature (OutletL.T); |
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| 65 | * the trays liquid level (Level) OR the trays liquid flow (OutletL.F); |
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| 66 | * (NoComps - 1) OutletL (OR OutletV) compositions for each tray. |
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| 67 | "; |
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| 68 | |
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| 69 | PARAMETERS |
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| 70 | outer PP as Plugin (Brief="External Physical Properties", Type="PP"); |
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| 71 | outer NComp as Integer (Brief="Number of components"); |
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| 72 | NumberOfTrays as Integer (Brief="Number of trays", Default=8); |
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| 73 | FeedTrayIndex(NumberOfTrays) as Integer (Brief="Number of trays", Default=0,Hidden=true); |
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| 74 | LiqSideTrayIndex(NumberOfTrays) as Integer (Brief="Number of trays", Default=0,Hidden=true); |
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| 75 | VapSideTrayIndex(NumberOfTrays) as Integer (Brief="Number of trays", Default=0,Hidden=true); |
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| 76 | FeedTrayLocation as Integer (Brief="Feed tray Location", Default=2); |
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| 77 | LiquidSideStreamLocation as Integer (Brief="Liquid Side Stream Location", Default=2); |
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| 78 | VapourSideStreamLocation as Integer (Brief="Vapour Side Stream Location", Default=2); |
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| 79 | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
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| 80 | Mw(NComp) as molweight (Brief="Component Mol Weight",Hidden=true); |
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| 81 | |
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| 82 | VapourFlowModel as Switcher (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer"); |
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| 83 | LiquidFlowModel as Switcher (Valid = ["default", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "default"); |
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| 84 | |
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| 85 | VolumeOfTray as volume (Brief="Total Volume of the tray"); |
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| 86 | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
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| 87 | PlateArea as area (Brief="Plate area = Atray - Adowncomer"); |
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| 88 | |
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| 89 | HolesArea as area (Brief="Total holes area"); |
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| 90 | WeirLength as length (Brief="Weir length"); |
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| 91 | WeirHeight as length (Brief="Weir height"); |
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| 92 | FeeheryCoeff as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1); |
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| 93 | ElgueCoeff as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1); |
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| 94 | OlsenCoeff as Real (Brief="Olsens correlation coefficient", Default=1); |
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| 95 | TrayLiquidPasses as Real (Brief="Number of liquid passes in the tray", Default=1); |
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| 96 | |
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| 97 | TopTemperature as temperature; |
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| 98 | TbottomTemperature as temperature; |
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| 99 | LevelFraction as fraction (Brief = "Level Fraction"); |
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| 100 | |
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| 101 | TopComposition(NComp) as fraction (Brief = "Component Molar Fraction at Top"); |
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| 102 | BottomComposition(NComp) as fraction (Brief = "Component Molar Fraction at Bottom"); |
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| 103 | |
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| 104 | V as volume (Brief="Total Volume of the tray",Hidden=true); |
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| 105 | Q as heat_rate (Brief="Rate of heat supply",Hidden=true); |
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| 106 | Ap as area (Brief="Plate area = Atray - Adowncomer",Hidden=true); |
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| 107 | |
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| 108 | Ah as area (Brief="Total holes area",Hidden=true); |
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| 109 | lw as length (Brief="Weir length",Hidden=true); |
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| 110 | hw as length (Brief="Weir height",Hidden=true); |
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| 111 | beta as fraction (Brief="Aeration fraction"); |
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| 112 | alfa as fraction (Brief="Dry pressure drop coefficient"); |
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| 113 | w as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true); |
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| 114 | btray as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true); |
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| 115 | fw as Real (Brief="Olsens correlation coefficient", Default=1,Hidden=true); |
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| 116 | Np as Real (Brief="Number of liquid passes in the tray", Default=1,Hidden=true); |
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| 117 | |
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| 118 | VapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
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| 119 | LiquidFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
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| 120 | |
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| 121 | SET |
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| 122 | FeedTrayIndex(FeedTrayLocation) =1; |
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| 123 | VapSideTrayIndex(FeedTrayLocation) =1; |
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| 124 | LiqSideTrayIndex(FeedTrayLocation) =1; |
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| 125 | Mw = PP.MolecularWeight(); |
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| 126 | |
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| 127 | V=VolumeOfTray; |
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| 128 | Q=HeatSupply; |
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| 129 | Ap=PlateArea; |
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| 130 | Ah=HolesArea; |
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| 131 | lw=WeirLength; |
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| 132 | hw=WeirHeight ; |
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| 133 | w=FeeheryCoeff; |
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| 134 | btray=ElgueCoeff; |
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| 135 | fw=OlsenCoeff; |
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| 136 | Np=TrayLiquidPasses; |
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| 137 | |
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| 138 | VARIABLES |
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| 139 | |
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| 140 | in FeedTray as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
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| 141 | VapourDrawOffFlow as flow_mol (Brief = "Stream Molar Flow Rate"); |
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| 142 | LiquidDrawOffFlow as flow_mol (Brief = "Stream Molar Flow Rate"); |
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| 143 | |
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| 144 | trays(NumberOfTrays) as User_tray (Brief="Number of trays"); |
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| 145 | |
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| 146 | MurphreeEff as Real (Brief = "Murphree efficiency"); |
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| 147 | |
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| 148 | CONNECTIONS |
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| 149 | |
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| 150 | trays([2:NumberOfTrays]).OutletV to trays([1:NumberOfTrays-1]).InletV; |
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| 151 | trays([1:NumberOfTrays-1]).OutletL to trays([2:NumberOfTrays]).InletL; |
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| 152 | |
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| 153 | |
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| 154 | EQUATIONS |
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| 155 | # Connecting Trays |
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| 156 | FeedTray.F*FeedTrayIndex= trays.Inlet.F; |
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| 157 | FeedTray.T = trays.Inlet.T; |
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| 158 | FeedTray.P = trays.Inlet.P; |
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| 159 | FeedTray.z = trays.Inlet.z; |
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| 160 | FeedTray.v = trays.Inlet.v; |
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| 161 | FeedTray.h = trays.Inlet.h; |
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| 162 | |
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| 163 | for i in [1:NumberOfTrays] |
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| 164 | |
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| 165 | "Murphree Efficiency" |
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| 166 | trays(i).OutletV.z = MurphreeEff * (trays(i).yideal - trays(i).InletV.z) + trays(i).InletV.z; |
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| 167 | |
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| 168 | "Level of clear liquid over the weir" |
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| 169 | trays(i).Level = trays(i).ML*trays(i).vL/Ap; |
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| 170 | |
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| 171 | "Geometry Constraint" |
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| 172 | V = trays(i).ML* trays(i).vL + trays(i).MV*trays(i).vV; |
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| 173 | |
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| 174 | "Energy Holdup" |
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| 175 | trays(i).E = trays(i).ML*trays(i).OutletL.h + trays(i).MV*trays(i).OutletV.h - trays(i).OutletL.P*V; |
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| 176 | |
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| 177 | "Energy Balance" |
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| 178 | diff(trays(i).E) = ( trays(i).Inlet.F*trays(i).Inlet.h + trays(i).InletL.F*trays(i).InletL.h + trays(i).InletV.F*trays(i).InletV.h- trays(i).OutletL.F*trays(i).OutletL.h - trays(i).OutletV.F*trays(i).OutletV.h |
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| 179 | -trays(i).VapourSideStream.F*trays(i).VapourSideStream.h - trays(i).LiquidSideStream.F*trays(i).LiquidSideStream.h + Q ); |
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| 180 | |
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| 181 | switch LiquidFlow |
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| 182 | case "on": |
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| 183 | switch LiquidFlowModel |
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| 184 | case "default": |
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| 185 | "Francis Equation" |
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| 186 | trays(i).OutletL.F*trays(i).vL = 1.84*'1/s'*lw*((trays(i).Level-(beta*hw))/(beta))^2; |
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| 187 | |
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| 188 | case "Wang_Fl": |
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| 189 | trays(i).OutletL.F*trays(i).vL = 1.84*'m^0.5/s'*lw*((trays(i).Level-(beta*hw))/(beta))^1.5; |
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| 190 | |
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| 191 | case "Olsen": |
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| 192 | trays(i).OutletL.F / 'mol/s'= lw*Np*trays(i).rhoL/sum(Mw*trays(i).OutletV.z)/(0.665*fw)^1.5 * ((trays(i).ML*sum(Mw*trays(i).OutletL.z)/trays(i).rhoL/Ap)-hw)^1.5 * 'm^0.5/mol'; |
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| 193 | |
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| 194 | case "Feehery_Fl": |
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| 195 | trays(i).OutletL.F = lw*trays(i).rhoL/sum(Mw*trays(i).OutletL.z) * ((trays(i).Level-hw)/750/'mm')^1.5 * 'm^2/s'; |
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| 196 | |
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| 197 | case "Roffel_Fl": |
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| 198 | trays(i).OutletL.F = 2/3*sqrt(2*g)*trays(i).rhoL/sum(Mw*trays(i).OutletL.z)*lw*(2*trays(i).btemp-1)*(trays(i).ML*sum(Mw*trays(i).OutletL.z)/(Ap*1.3)/trays(i).rhoL/(2*trays(i).btemp-1))^1.5; |
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| 199 | end |
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| 200 | when trays(i).Level < (beta *hw) switchto "off"; |
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| 201 | |
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| 202 | case "off": |
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| 203 | "Low level" |
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| 204 | trays(i).OutletL.F = 0 * 'mol/h'; |
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| 205 | when trays(i).Level > (beta * hw) + 1e-6*'m' switchto "on"; |
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| 206 | end |
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| 207 | |
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| 208 | trays(i).btemp = 1 - 0.3593/'Pa^0.0888545'*abs(trays(i).OutletV.F*sum(Mw*trays(i).OutletV.z)/(Ap*1.3)/sqrt(trays(i).rhoV))^0.177709; #/'(kg/m)^0.0888545/s^0.177709'; |
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| 209 | |
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| 210 | switch VapourFlow |
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| 211 | case "on": |
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| 212 | switch VapourFlowModel |
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| 213 | case "Reepmeyer": |
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| 214 | trays(i).InletV.F*trays(i).vV = sqrt((trays(i).InletV.P - trays(i).OutletV.P)/(trays(i).rhoV*alfa))*Ah; |
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| 215 | |
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| 216 | case "Feehery_Fv": |
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| 217 | trays(i).InletV.F = trays(i).rhoV/Ap/w/sum(Mw*trays(i).OutletV.z) * sqrt(((trays(i).InletV.P - trays(i).OutletV.P)-(trays(i).rhoV*g*trays(i).ML*trays(i).vL/Ap))/trays(i).rhoV); |
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| 218 | |
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| 219 | case "Roffel_Fv": |
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| 220 | trays(i).InletV.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (trays(i).InletV.P - trays(i).OutletV.P)*1e5 - (beta*sum(trays(i).M*Mw)/(Ap*1.3)*g*1e5) * (trays(i).rhoV*Ah/sum(Mw*trays(i).OutletV.z))^1.08 * 'm^1.08/mol^1.08'; |
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| 221 | |
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| 222 | case "Klingberg": |
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| 223 | trays(i).InletV.F * trays(i).vV = Ap * sqrt(((trays(i).InletV.P - trays(i).OutletV.P)-trays(i).rhoL*g*trays(i).Level)/trays(i).rhoV); |
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| 224 | |
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| 225 | case "Wang_Fv": |
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| 226 | trays(i).InletV.F * trays(i).vV = Ap * sqrt(((trays(i).InletV.P - trays(i).OutletV.P)-trays(i).rhoL*g*trays(i).Level)/trays(i).rhoV*alfa); |
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| 227 | |
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| 228 | case "Elgue": |
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| 229 | trays(i).InletV.F = sqrt((trays(i).InletV.P - trays(i).OutletV.P)/btray); |
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| 230 | end |
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| 231 | when trays(i).InletV.F < 1e-6 * 'kmol/h' switchto "off"; |
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| 232 | |
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| 233 | case "off": |
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| 234 | trays(i).InletV.F = 0 * 'mol/s'; |
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| 235 | when trays(i).InletV.P > trays(i).OutletV.P + trays(i).Level*g*trays(i).rhoL + 1e-1 * 'atm' switchto "on"; |
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| 236 | end |
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| 237 | |
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| 238 | end |
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| 239 | |
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| 240 | INITIAL |
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| 241 | |
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| 242 | for i in 1:NumberOfTrays |
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| 243 | |
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| 244 | "The initial temperature of the trays" |
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| 245 | trays(i).OutletL.T = TopTemperature+(TbottomTemperature-TopTemperature)*((i-1)/(NumberOfTrays-1)); |
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| 246 | |
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| 247 | "The initial Level of the trays" |
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| 248 | trays(i).Level = LevelFraction*hw; |
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| 249 | |
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| 250 | end |
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| 251 | |
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| 252 | for i in 1:NComp-1 |
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| 253 | |
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| 254 | for j in 1:NumberOfTrays |
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| 255 | |
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| 256 | "The initial composition of the trays" |
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| 257 | trays(j).OutletL.z(i) = TopComposition(i) +(BottomComposition(i)-TopComposition(i) )*((j-1)/(NumberOfTrays-1)); |
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| 258 | |
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| 259 | end |
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| 260 | |
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| 261 | end |
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| 262 | |
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| 263 | end |
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| 264 | |
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| 265 | Model User_Section_Column as User_Section_ColumnBasic |
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| 266 | |
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| 267 | ATTRIBUTES |
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| 268 | Pallete = true; |
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| 269 | Icon = "icon/SectionColumn"; |
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| 270 | Brief = "Model of a column section."; |
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| 271 | Info = |
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| 272 | "== Model of a column section containing == |
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| 273 | * NumberOfTrays trays. |
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| 274 | |
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| 275 | == Specify == |
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| 276 | * the feed stream of each tray (Inlet); |
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| 277 | * the Murphree eficiency for each tray Emv; |
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| 278 | * the InletL stream of the top tray; |
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| 279 | * the InletV stream of the bottom tray. |
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| 280 | |
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| 281 | == Initial Conditions == |
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| 282 | * the trays temperature (OutletL.T); |
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| 283 | * the trays liquid level (Level) OR the trays liquid flow (OutletL.F); |
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| 284 | * (NoComps - 1) OutletL (OR OutletV) compositions for each tray. |
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| 285 | "; |
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| 286 | |
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| 287 | VARIABLES |
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| 288 | |
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| 289 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.35,Protected = true); |
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| 290 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.65,Protected = true); |
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| 291 | |
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| 292 | in LiquidInlet as stream (Brief="Liquid Inlet in the section", PosX=0.80, PosY=0); |
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| 293 | out VapourOutlet as vapour_stream (Brief="Vapour Outlet in the section", PosX=0.30, PosY=0); |
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| 294 | |
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| 295 | in VapourInlet as stream (Brief="Vapour Inlet in the section", PosX=0.30, PosY=1); |
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| 296 | out LiquidOutlet as liquid_stream (Brief="Liquid Outlet in the section", PosX=0.80, PosY=1); |
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| 297 | |
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| 298 | LiquidConnector as stream (Brief="Liquid connection at the middle trays", PosX=0.75, PosY=1,Hidden=true); |
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| 299 | VapourConnector as stream (Brief="Vapour connection at the middle trays", PosX=0.55, PosY=0,Hidden=true); |
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| 300 | |
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| 301 | CONNECTIONS |
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| 302 | |
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| 303 | LiquidConnector to trays(1).InletL; |
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| 304 | VapourConnector to trays(NumberOfTrays).InletV; |
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| 305 | |
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| 306 | EQUATIONS |
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| 307 | |
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| 308 | LiquidConnector.F= LiquidInlet.F; |
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| 309 | LiquidConnector.T = LiquidInlet.T; |
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| 310 | LiquidConnector.P = LiquidInlet.P; |
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| 311 | LiquidConnector.z = LiquidInlet.z; |
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| 312 | LiquidConnector.v = LiquidInlet.v; |
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| 313 | LiquidConnector.h = LiquidInlet.h; |
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| 314 | |
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| 315 | VapourConnector.F= VapourInlet.F; |
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| 316 | VapourConnector.T = VapourInlet.T; |
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| 317 | VapourConnector.P = VapourInlet.P; |
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| 318 | VapourConnector.z = VapourInlet.z; |
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| 319 | VapourConnector.v = VapourInlet.v; |
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| 320 | VapourConnector.h = VapourInlet.h; |
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| 321 | |
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| 322 | LiquidOutlet.F= trays(NumberOfTrays).OutletL.F; |
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| 323 | LiquidOutlet.T = trays(NumberOfTrays).OutletL.T; |
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| 324 | LiquidOutlet.P = trays(NumberOfTrays).OutletL.P; |
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| 325 | LiquidOutlet.z = trays(NumberOfTrays).OutletL.z; |
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| 326 | |
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| 327 | VapourOutlet.F= trays(1).OutletV.F; |
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| 328 | VapourOutlet.T = trays(1).OutletV.T; |
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| 329 | VapourOutlet.P = trays(1).OutletV.P; |
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| 330 | VapourOutlet.z = trays(1).OutletV.z; |
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| 331 | |
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| 332 | VapourDrawOff.F*VapSideTrayIndex= trays.VapourSideStream.F; |
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| 333 | VapourDrawOff.T = trays(VapourSideStreamLocation).VapourSideStream.T; |
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| 334 | VapourDrawOff.P = trays(VapourSideStreamLocation).VapourSideStream.P; |
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| 335 | VapourDrawOff.z = trays(VapourSideStreamLocation).VapourSideStream.z; |
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| 336 | |
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| 337 | LiquidDrawOff.F*LiqSideTrayIndex= trays.LiquidSideStream.F; |
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| 338 | LiquidDrawOff.T = trays(LiquidSideStreamLocation).LiquidSideStream.T; |
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| 339 | LiquidDrawOff.P = trays(LiquidSideStreamLocation).LiquidSideStream.P; |
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| 340 | LiquidDrawOff.z = trays(LiquidSideStreamLocation).LiquidSideStream.z; |
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| 341 | |
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| 342 | VapourDrawOffFlow = VapourDrawOff.F; |
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| 343 | LiquidDrawOffFlow = LiquidDrawOff.F; |
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| 344 | |
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| 345 | end |
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| 346 | |
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| 347 | #*---------------------------------------------------------------------- |
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| 348 | * Model of a distillation column containing: |
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| 349 | * - NumberOfTrays like tray; |
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| 350 | * - a kettle reboiler; |
|---|
| 351 | * - dynamic condenser; |
|---|
| 352 | * - a splitter which separate reflux and distillate; |
|---|
| 353 | * - a pump in reflux stream; |
|---|
| 354 | *---------------------------------------------------------------------*# |
|---|
| 355 | Model User_Distillation_kettle_cond as User_Section_ColumnBasic |
|---|
| 356 | |
|---|
| 357 | ATTRIBUTES |
|---|
| 358 | Pallete = true; |
|---|
| 359 | Icon = "icon/DistillationKettleCond"; |
|---|
| 360 | Brief = "Model of a distillation column with dynamic condenser and dynamic reboiler."; |
|---|
| 361 | Info = |
|---|
| 362 | "== Specify == |
|---|
| 363 | * the feed stream of each tray (Inlet); |
|---|
| 364 | * the Murphree eficiency for each tray Emv; |
|---|
| 365 | * the pump pressure difference; |
|---|
| 366 | * the heat supllied in reboiler and condenser; |
|---|
| 367 | * the condenser vapor outlet flow (OutletV.F); |
|---|
| 368 | * the reboiler liquid outlet flow (OutletL.F); |
|---|
| 369 | * both splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
|---|
| 370 | |
|---|
| 371 | == Initial Conditions == |
|---|
| 372 | * the trays temperature (OutletL.T); |
|---|
| 373 | * the trays liquid level (Level) OR the trays liquid flow (OutletL.F); |
|---|
| 374 | * (NoComps - 1) OutletL (OR OutletV) compositions for each tray; |
|---|
| 375 | |
|---|
| 376 | * the condenser temperature (OutletL.T); |
|---|
| 377 | * the condenser liquid level (Level); |
|---|
| 378 | * (NoComps - 1) OutletL (OR OutletV) compositions; |
|---|
| 379 | |
|---|
| 380 | * the reboiler temperature (OutletL.T); |
|---|
| 381 | * the reboiler liquid level (Level); |
|---|
| 382 | * (NoComps - 1) OutletL (OR OutletV) compositions. |
|---|
| 383 | "; |
|---|
| 384 | |
|---|
| 385 | PARAMETERS |
|---|
| 386 | CondenserVapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
|---|
| 387 | |
|---|
| 388 | VARIABLES |
|---|
| 389 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.46,Protected = true); |
|---|
| 390 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.58,Protected = true); |
|---|
| 391 | CondenserUnity as condenser; |
|---|
| 392 | ReboilerUnity as reboiler; |
|---|
| 393 | SplitterTop as splitter; |
|---|
| 394 | PumpUnity as pump; |
|---|
| 395 | alfaTopo as Real; |
|---|
| 396 | |
|---|
| 397 | out HeatToReboiler as energy_stream (Brief="Heat supplied to Reboiler",Hidden=true); |
|---|
| 398 | out HeatToCondenser as energy_stream (Brief="Heat supplied to Condenser",Hidden=true); |
|---|
| 399 | |
|---|
| 400 | RebNoFlow as sourceNoFlow (Brief="No Inlet Flow to Reboiler",Hidden=true); |
|---|
| 401 | |
|---|
| 402 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Top Condenser", PosX=0.67, PosY=0); |
|---|
| 403 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true); |
|---|
| 404 | |
|---|
| 405 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.33); |
|---|
| 406 | in ConnectorSplitterOut as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
|---|
| 407 | |
|---|
| 408 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Reboiler", PosX=1, PosY=1); |
|---|
| 409 | in ConnectorReboilerLout as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
|---|
| 410 | |
|---|
| 411 | EQUATIONS |
|---|
| 412 | |
|---|
| 413 | switch CondenserVapourFlow |
|---|
| 414 | |
|---|
| 415 | case "on": |
|---|
| 416 | CondenserUnity.InletV.F*trays(1).vV = alfaTopo *Ah * sqrt(2*(trays(1).OutletV.P - |
|---|
| 417 | CondenserUnity.OutletL.P + 1e-8 * 'atm') / (alfa*trays(1).rhoV)); |
|---|
| 418 | when CondenserUnity.InletV.F < 1e-6 * 'kmol/h' switchto "off"; |
|---|
| 419 | |
|---|
| 420 | case "off": |
|---|
| 421 | CondenserUnity.InletV.F = 0 * 'mol/s'; |
|---|
| 422 | when trays(1).OutletV.P > CondenserUnity.OutletL.P + 1e-1 * 'atm' switchto "on"; |
|---|
| 423 | |
|---|
| 424 | end |
|---|
| 425 | |
|---|
| 426 | # Condenser Connector Equations |
|---|
| 427 | ConnectorCondenserVout.T = VapourDistillate.T; |
|---|
| 428 | ConnectorCondenserVout.P = VapourDistillate.P; |
|---|
| 429 | ConnectorCondenserVout.F = VapourDistillate.F; |
|---|
| 430 | ConnectorCondenserVout.z = VapourDistillate.z; |
|---|
| 431 | |
|---|
| 432 | # Splitter Connector Equations |
|---|
| 433 | ConnectorSplitterOut.T = LiquidDistillate.T; |
|---|
| 434 | ConnectorSplitterOut.P = LiquidDistillate.P; |
|---|
| 435 | ConnectorSplitterOut.F = LiquidDistillate.F; |
|---|
| 436 | ConnectorSplitterOut.z = LiquidDistillate.z; |
|---|
| 437 | |
|---|
| 438 | # Reboiler Connector Equations |
|---|
| 439 | ConnectorReboilerLout.T = BottomProduct.T; |
|---|
| 440 | ConnectorReboilerLout.P = BottomProduct.P; |
|---|
| 441 | ConnectorReboilerLout.F = BottomProduct.F; |
|---|
| 442 | ConnectorReboilerLout.z = BottomProduct.z; |
|---|
| 443 | |
|---|
| 444 | VapourDrawOff.F*VapSideTrayIndex= trays.VapourSideStream.F; |
|---|
| 445 | VapourDrawOff.T = trays(VapourSideStreamLocation).VapourSideStream.T; |
|---|
| 446 | VapourDrawOff.P = trays(VapourSideStreamLocation).VapourSideStream.P; |
|---|
| 447 | VapourDrawOff.z = trays(VapourSideStreamLocation).VapourSideStream.z; |
|---|
| 448 | |
|---|
| 449 | LiquidDrawOff.F*LiqSideTrayIndex= trays.LiquidSideStream.F; |
|---|
| 450 | LiquidDrawOff.T = trays(LiquidSideStreamLocation).LiquidSideStream.T; |
|---|
| 451 | LiquidDrawOff.P = trays(LiquidSideStreamLocation).LiquidSideStream.P; |
|---|
| 452 | LiquidDrawOff.z = trays(LiquidSideStreamLocation).LiquidSideStream.z; |
|---|
| 453 | |
|---|
| 454 | VapourDrawOffFlow = VapourDrawOff.F; |
|---|
| 455 | LiquidDrawOffFlow = LiquidDrawOff.F; |
|---|
| 456 | |
|---|
| 457 | CONNECTIONS |
|---|
| 458 | #vapor |
|---|
| 459 | ReboilerUnity.OutletV to trays(NumberOfTrays).InletV; |
|---|
| 460 | trays(1).OutletV to CondenserUnity.InletV; |
|---|
| 461 | |
|---|
| 462 | #liquid |
|---|
| 463 | CondenserUnity.OutletL to SplitterTop.Inlet; |
|---|
| 464 | SplitterTop.Outlet2 to PumpUnity.Inlet; |
|---|
| 465 | PumpUnity.Outlet to trays(1).InletL; |
|---|
| 466 | trays(NumberOfTrays).OutletL to ReboilerUnity.InletL; |
|---|
| 467 | |
|---|
| 468 | #Connectors |
|---|
| 469 | HeatToReboiler to ReboilerUnity.InletQ; |
|---|
| 470 | HeatToCondenser to CondenserUnity.InletQ; |
|---|
| 471 | RebNoFlow.Outlet to ReboilerUnity.Inlet; |
|---|
| 472 | |
|---|
| 473 | CondenserUnity.OutletV to ConnectorCondenserVout; |
|---|
| 474 | SplitterTop.Outlet1 to ConnectorSplitterOut; |
|---|
| 475 | ReboilerUnity.OutletL to ConnectorReboilerLout; |
|---|
| 476 | |
|---|
| 477 | end |
|---|
| 478 | |
|---|
| 479 | |
|---|
| 480 | #* ------------------------------------------------------------------- |
|---|
| 481 | * Distillation Column model with: |
|---|
| 482 | * |
|---|
| 483 | * - NumberOfTrays like tray; |
|---|
| 484 | * - a vessel in the bottom of column; |
|---|
| 485 | * - a splitter who separate the bottom product and the stream to reboiler; |
|---|
| 486 | * - steady state reboiler (thermosyphon); |
|---|
| 487 | * - a steady state condenser with subcooling; |
|---|
| 488 | * - a vessel drum (layed cilinder); |
|---|
| 489 | * - a splitter which separate reflux and distillate; |
|---|
| 490 | * - a pump in reflux stream. |
|---|
| 491 | * |
|---|
| 492 | * ------------------------------------------------------------------*# |
|---|
| 493 | Model User_Distillation_thermosyphon_subcooling as User_Section_ColumnBasic |
|---|
| 494 | |
|---|
| 495 | ATTRIBUTES |
|---|
| 496 | Pallete = true; |
|---|
| 497 | Icon = "icon/DistillationThermosyphonSubcooling"; |
|---|
| 498 | Brief = "Model of a distillation column with steady condenser and steady reboiler."; |
|---|
| 499 | Info = |
|---|
| 500 | "== Specify == |
|---|
| 501 | * the feed stream of each tray (Inlet); |
|---|
| 502 | * the Murphree eficiency for each tray Emv; |
|---|
| 503 | * the pump head; |
|---|
| 504 | * the condenser pressure drop; |
|---|
| 505 | * the heat supllied in top and bottom tanks; |
|---|
| 506 | * the heat supllied in condenser and reboiler; |
|---|
| 507 | * the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product; |
|---|
| 508 | * both top splitter outlet flows OR one of the splitter outlet flows and the splitter frac. |
|---|
| 509 | |
|---|
| 510 | == Initial Conditions == |
|---|
| 511 | * the trays temperature (OutletL.T); |
|---|
| 512 | * the trays liquid level (Level) OR the trays liquid flow (OutletL.F); |
|---|
| 513 | * (NoComps - 1) OutletL (OR OutletV) compositions for each tray; |
|---|
| 514 | |
|---|
| 515 | * the top tank temperature (OutletL.T); |
|---|
| 516 | * the top tank liquid level (Level); |
|---|
| 517 | * (NoComps - 1) OutletL (OR OutletV) compositions; |
|---|
| 518 | |
|---|
| 519 | * the bottom tank temperature (OutletL.T); |
|---|
| 520 | * the bottom tank liquid level (Level); |
|---|
| 521 | * (NoComps - 1) OutletL (OR OutletV) compositions. |
|---|
| 522 | "; |
|---|
| 523 | |
|---|
| 524 | PARAMETERS |
|---|
| 525 | |
|---|
| 526 | CondenserVapourFlow as Switcher(Valid = ["on", "off"], Hidden=true, Default = "on"); |
|---|
| 527 | |
|---|
| 528 | VARIABLES |
|---|
| 529 | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.41,Protected = true); |
|---|
| 530 | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.515,Protected = true); |
|---|
| 531 | CondenserUnity as condenserSteady; |
|---|
| 532 | TopVessel as tank_cylindrical; |
|---|
| 533 | TopSplitter as splitter; |
|---|
| 534 | PumpUnity as pump; |
|---|
| 535 | ReboilerUnity as reboilerSteady; |
|---|
| 536 | BottomVessel as tank; |
|---|
| 537 | BottomSplitter as splitter; |
|---|
| 538 | |
|---|
| 539 | |
|---|
| 540 | alfaTopo as Real; |
|---|
| 541 | |
|---|
| 542 | out HeatToCondenser as energy_stream (Brief="Heat supplied to Condenser",Hidden=true); |
|---|
| 543 | out HeatToReboiler as energy_stream (Brief="Heat supplied to Reboiler",Hidden=true); |
|---|
| 544 | out HeatToBottomVessel as energy_stream (Brief="Heat supplied to Bottom Vessel",Hidden=true); |
|---|
| 545 | out HeatToTopVessel as energy_stream (Brief="Heat supplied to Top Vessel",Hidden=true); |
|---|
| 546 | |
|---|
| 547 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.30); |
|---|
| 548 | in ConnectorSplitterTop as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
|---|
| 549 | |
|---|
| 550 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Bottom Splitter", PosX=1, PosY=1); |
|---|
| 551 | in ConnectorSplitterBottom as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
|---|
| 552 | |
|---|
| 553 | EQUATIONS |
|---|
| 554 | |
|---|
| 555 | # Top Splitter Connector Equations |
|---|
| 556 | ConnectorSplitterTop.T = LiquidDistillate.T; |
|---|
| 557 | ConnectorSplitterTop.P = LiquidDistillate.P; |
|---|
| 558 | ConnectorSplitterTop.F = LiquidDistillate.F; |
|---|
| 559 | ConnectorSplitterTop.z = LiquidDistillate.z; |
|---|
| 560 | |
|---|
| 561 | # Bottom Splitter Connector Equations |
|---|
| 562 | ConnectorSplitterBottom.T = BottomProduct.T; |
|---|
| 563 | ConnectorSplitterBottom.P = BottomProduct.P; |
|---|
| 564 | ConnectorSplitterBottom.F = BottomProduct.F; |
|---|
| 565 | ConnectorSplitterBottom.z = BottomProduct.z; |
|---|
| 566 | |
|---|
| 567 | VapourDrawOff.F*VapSideTrayIndex= trays.VapourSideStream.F; |
|---|
| 568 | VapourDrawOff.T = trays(VapourSideStreamLocation).VapourSideStream.T; |
|---|
| 569 | VapourDrawOff.P = trays(VapourSideStreamLocation).VapourSideStream.P; |
|---|
| 570 | VapourDrawOff.z = trays(VapourSideStreamLocation).VapourSideStream.z; |
|---|
| 571 | |
|---|
| 572 | LiquidDrawOff.F*LiqSideTrayIndex= trays.LiquidSideStream.F; |
|---|
| 573 | LiquidDrawOff.T = trays(LiquidSideStreamLocation).LiquidSideStream.T; |
|---|
| 574 | LiquidDrawOff.P = trays(LiquidSideStreamLocation).LiquidSideStream.P; |
|---|
| 575 | LiquidDrawOff.z = trays(LiquidSideStreamLocation).LiquidSideStream.z; |
|---|
| 576 | |
|---|
| 577 | VapourDrawOffFlow = VapourDrawOff.F; |
|---|
| 578 | LiquidDrawOffFlow = LiquidDrawOff.F; |
|---|
| 579 | |
|---|
| 580 | switch CondenserVapourFlow |
|---|
| 581 | |
|---|
| 582 | case "on": |
|---|
| 583 | CondenserUnity.InletV.F*trays(1).vV = alfaTopo * Ah * sqrt(2*(trays(1).OutletV.P - |
|---|
| 584 | CondenserUnity.OutletL.P + 1e-8 * 'atm') / (alfa*trays(1).rhoV)); |
|---|
| 585 | when CondenserUnity.InletV.F < 1e-6 * 'kmol/h' switchto "off"; |
|---|
| 586 | |
|---|
| 587 | case "off": |
|---|
| 588 | CondenserUnity.InletV.F = 0 * 'mol/s'; |
|---|
| 589 | when trays(1).OutletV.P > CondenserUnity.OutletL.P + 1e-1 * 'atm' switchto "on"; |
|---|
| 590 | |
|---|
| 591 | end |
|---|
| 592 | |
|---|
| 593 | CONNECTIONS |
|---|
| 594 | #vapor |
|---|
| 595 | ReboilerUnity.OutletV to trays(NumberOfTrays).InletV; |
|---|
| 596 | trays(1).OutletV to CondenserUnity.InletV; |
|---|
| 597 | |
|---|
| 598 | #liquid |
|---|
| 599 | CondenserUnity.OutletL to TopVessel.Inlet; |
|---|
| 600 | TopVessel.Outlet to TopSplitter.Inlet; |
|---|
| 601 | TopSplitter.Outlet2 to PumpUnity.Inlet; |
|---|
| 602 | PumpUnity.Outlet to trays(1).InletL; |
|---|
| 603 | trays(NumberOfTrays).OutletL to BottomVessel.Inlet; |
|---|
| 604 | BottomVessel.Outlet to BottomSplitter.Inlet; |
|---|
| 605 | BottomSplitter.Outlet2 to ReboilerUnity.InletL; |
|---|
| 606 | |
|---|
| 607 | #Connectors |
|---|
| 608 | HeatToCondenser to CondenserUnity.InletQ; |
|---|
| 609 | HeatToReboiler to ReboilerUnity.InletQ; |
|---|
| 610 | HeatToBottomVessel to BottomVessel.InletQ; |
|---|
| 611 | HeatToTopVessel to TopVessel.InletQ; |
|---|
| 612 | TopSplitter.Outlet1 to ConnectorSplitterTop; |
|---|
| 613 | BottomSplitter.Outlet1 to ConnectorSplitterBottom; |
|---|
| 614 | |
|---|
| 615 | end |
|---|
| 616 | |
|---|
| 617 | |
|---|
| 618 | #* ------------------------------------------------------------------- |
|---|
| 619 | * Distillation Column model with: |
|---|
| 620 | * |
|---|
| 621 | * - NumberOfTrays like tray; |
|---|
| 622 | * - a vessel in the bottom of column; |
|---|
| 623 | * - a splitter who separate the bottom product and the stream to reboiler; |
|---|
| 624 | * - steady state reboiler (thermosyphon); |
|---|
| 625 | * - a dynamic condenser without subcooling; |
|---|
| 626 | * - a splitter which separate reflux and distillate; |
|---|
| 627 | * - a pump in reflux stream. |
|---|
| 628 | * |
|---|
| 629 | * ------------------------------------------------------------------*# |
|---|
| 630 | Model User_Distillation_thermosyphon_cond as User_Section_ColumnBasic |
|---|
| 631 | |
|---|
| 632 | ATTRIBUTES |
|---|
| 633 | Pallete = true; |
|---|
| 634 | Icon = "icon/DistillationThermosyphonCond"; |
|---|
| 635 | Brief = "Model of a distillation column with dynamic condenser and steady reboiler."; |
|---|
| 636 | Info = |
|---|
| 637 | "== Specify == |
|---|
| 638 | * the feed stream of each tray (Inlet); |
|---|
| 639 | * the Murphree eficiency for each tray Emv; |
|---|
| 640 | * the pump head; |
|---|
| 641 | * the condenser vapor outlet flow (OutletV.F); |
|---|
| 642 | * the heat supllied in bottom tank; |
|---|
| 643 | * the heat supllied in condenser and reboiler; |
|---|
| 644 | * the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product; |
|---|
| 645 | |
|---|
| 646 | == Initial Conditions == |
|---|
| 647 | * the trays temperature (OutletL.T); |
|---|
| 648 | * the trays liquid level (Level) OR the trays liquid flow (OutletL.F); |
|---|
| 649 | * (NoComps - 1) OutletL (OR OutletV) compositions for each tray; |
|---|
| 650 | |
|---|
| 651 | * the condenser temperature (OutletL.T); |
|---|
| 652 | * the condenser liquid level (Level); |
|---|
| 653 | * (NoComps - 1) OutletL (OR OutletV) compositions; |
|---|
| 654 | |
|---|
| 655 | * the bottom tank temperature (OutletL.T); |
|---|
| 656 | * the bottom tank liquid level (Level); |
|---|
| 657 | * (NoComps - 1) OutletL (OR OutletV) compositions. |
|---|
| 658 | "; |
|---|
| 659 | |
|---|
| 660 | PARAMETERS |
|---|
| 661 | CondenserVapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
|---|
| 662 | |
|---|
| 663 | VARIABLES |
|---|
| 664 | |
|---|
| 665 | CondenserUnity as condenser; |
|---|
| 666 | SplitterTop as splitter; |
|---|
| 667 | PumpUnity as pump; |
|---|
| 668 | BottomVessel as tank; |
|---|
| 669 | SplitterBottom as splitter; |
|---|
| 670 | ReboilerUnity as reboilerSteady; |
|---|
| 671 | alfaTopo as Real; |
|---|
| 672 | |
|---|
| 673 | out HeatToCondenser as energy_stream (Brief="Heat supplied to Condenser",Hidden=true); |
|---|
| 674 | out HeatToReboiler as energy_stream (Brief="Heat supplied to Reboiler",Hidden=true); |
|---|
| 675 | out HeatToBottomVessel as energy_stream (Brief="Heat supplied to Bottom Vessel",Hidden=true); |
|---|
| 676 | |
|---|
| 677 | out VapourDistillate as vapour_stream (Brief="Vapour outlet stream From Top Condenser", PosX=0.73, PosY=0); |
|---|
| 678 | in ConnectorCondenserVout as stream (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true); |
|---|
| 679 | |
|---|
| 680 | out LiquidDistillate as liquid_stream (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.45); |
|---|
| 681 | in ConnectorSplitterTop as stream (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true); |
|---|
| 682 | |
|---|
| 683 | out BottomProduct as liquid_stream (Brief="Liquid outlet stream From Bottom Splitter", PosX=1, PosY=1); |
|---|
| 684 | in ConnectorSplitterBottom as stream (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true); |
|---|
| 685 | |
|---|
| 686 | EQUATIONS |
|---|
| 687 | |
|---|
| 688 | # Condenser Connector Equations |
|---|
| 689 | ConnectorCondenserVout.T = VapourDistillate.T; |
|---|
| 690 | ConnectorCondenserVout.P = VapourDistillate.P; |
|---|
| 691 | ConnectorCondenserVout.F = VapourDistillate.F; |
|---|
| 692 | ConnectorCondenserVout.z = VapourDistillate.z; |
|---|
| 693 | |
|---|
| 694 | # Top Splitter Connector Equations |
|---|
| 695 | ConnectorSplitterTop.T = LiquidDistillate.T; |
|---|
| 696 | ConnectorSplitterTop.P = LiquidDistillate.P; |
|---|
| 697 | ConnectorSplitterTop.F = LiquidDistillate.F; |
|---|
| 698 | ConnectorSplitterTop.z = LiquidDistillate.z; |
|---|
| 699 | |
|---|
| 700 | # Bottom Splitter Connector Equations |
|---|
| 701 | ConnectorSplitterBottom.T = BottomProduct.T; |
|---|
| 702 | ConnectorSplitterBottom.P = BottomProduct.P; |
|---|
| 703 | ConnectorSplitterBottom.F = BottomProduct.F; |
|---|
| 704 | ConnectorSplitterBottom.z = BottomProduct.z; |
|---|
| 705 | |
|---|
| 706 | switch CondenserVapourFlow |
|---|
| 707 | case "on": |
|---|
| 708 | CondenserUnity.InletV.F*trays(1).vV = alfaTopo * Ah * sqrt(2*(trays(1).OutletV.P - |
|---|
| 709 | CondenserUnity.OutletL.P + 1e-8 * 'atm') / (alfa*trays(1).rhoV)); |
|---|
| 710 | when CondenserUnity.InletV.F < 1e-6 * 'kmol/h' switchto "off"; |
|---|
| 711 | |
|---|
| 712 | case "off": |
|---|
| 713 | CondenserUnity.InletV.F = 0 * 'mol/s'; |
|---|
| 714 | when trays(1).OutletV.P > CondenserUnity.OutletL.P + 1e-1 * 'atm' switchto "on"; |
|---|
| 715 | end |
|---|
| 716 | |
|---|
| 717 | CONNECTIONS |
|---|
| 718 | #vapor |
|---|
| 719 | ReboilerUnity.OutletV to trays(NumberOfTrays).InletV; |
|---|
| 720 | trays(1).OutletV to CondenserUnity.InletV; |
|---|
| 721 | |
|---|
| 722 | #liquid |
|---|
| 723 | CondenserUnity.OutletL to SplitterTop.Inlet; |
|---|
| 724 | SplitterTop.Outlet2 to PumpUnity.Inlet; |
|---|
| 725 | PumpUnity.Outlet to trays(1).InletL; |
|---|
| 726 | trays(NumberOfTrays).OutletL to BottomVessel.Inlet; |
|---|
| 727 | BottomVessel.Outlet to SplitterBottom.Inlet; |
|---|
| 728 | SplitterBottom.Outlet2 to ReboilerUnity.InletL; |
|---|
| 729 | |
|---|
| 730 | #Connectors |
|---|
| 731 | HeatToCondenser to CondenserUnity.InletQ; |
|---|
| 732 | HeatToReboiler to ReboilerUnity.InletQ; |
|---|
| 733 | HeatToBottomVessel to BottomVessel.InletQ; |
|---|
| 734 | CondenserUnity.OutletV to ConnectorCondenserVout; |
|---|
| 735 | SplitterTop.Outlet1 to ConnectorSplitterTop; |
|---|
| 736 | SplitterBottom.Outlet1 to ConnectorSplitterBottom; |
|---|
| 737 | |
|---|
| 738 | end |
|---|
