| 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 | * Author: Gerson Balbueno Bicca |
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| 16 | * $Id: heater.mso 319 2007-07-19 18:37:06Z bicca $ |
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| 17 | *--------------------------------------------------------------------*# |
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| 18 | |
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| 19 | using "streams.mso"; |
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| 20 | |
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| 21 | Model heater |
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| 22 | |
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| 23 | ATTRIBUTES |
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| 24 | Pallete = true; |
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| 25 | Icon = "icon/heater"; |
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| 26 | Brief = "Heater or Cooler"; |
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| 27 | Info = |
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| 28 | "Determines thermal and phase conditions of an outlet stream"; |
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| 29 | |
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| 30 | PARAMETERS |
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| 31 | outer PP as Plugin (Brief="Physical Properties", Type="PP"); |
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| 32 | outer NComp as Integer (Brief="Number of Components"); |
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| 33 | Ninlet as Integer (Brief="Number of Inlet Streams"); |
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| 34 | Kvalues as Switcher (Brief="Option for Display Phase Equilibrium K-values",Valid=["yes","no"], Default="yes"); |
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| 35 | |
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| 36 | SUBMODELS |
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| 37 | in Inlet(Ninlet ) as stream (Brief="Inlet Streams"); |
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| 38 | out Outlet as streamPH (Brief="Outlet Stream"); |
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| 39 | in InletHeat as energy_stream (Brief ="Inlet Heat Stream"); |
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| 40 | out OutletHeat as energy_stream (Brief ="Outlet Heat Stream"); |
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| 41 | |
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| 42 | VARIABLES |
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| 43 | QDuty as power (Brief = "Actual Duty"); |
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| 44 | Vfrac as fraction (Brief = "Vapor fraction Outlet Stream"); |
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| 45 | Lfrac as fraction (Brief = "Liquid fraction Outlet Stream"); |
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| 46 | Kvalue(NComp) as Real (Brief = "Phase Equilibrium K-values"); |
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| 47 | |
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| 48 | EQUATIONS |
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| 49 | |
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| 50 | "Flow" |
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| 51 | Outlet.F = sum(Inlet.F); |
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| 52 | |
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| 53 | for j in [1 : NComp] |
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| 54 | |
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| 55 | "Composition" |
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| 56 | Outlet.F*Outlet.z(j) = sum(Inlet.F*Inlet.z(j)); |
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| 57 | |
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| 58 | end |
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| 59 | |
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| 60 | "Vapor fraction Outlet Stream" |
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| 61 | Vfrac = Outlet.v; |
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| 62 | |
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| 63 | "Liquid fraction Outlet Stream" |
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| 64 | Lfrac = 1-Vfrac; |
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| 65 | |
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| 66 | "Heat Duty" |
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| 67 | QDuty = Outlet.F*Outlet.h - sum(Inlet.F*Inlet.h); |
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| 68 | |
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| 69 | "Net Duty" |
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| 70 | OutletHeat.Q = InletHeat.Q - QDuty; |
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| 71 | |
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| 72 | switch Kvalues # Fix for better convergence !!! |
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| 73 | case "yes": |
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| 74 | "K-values Phase Equilibrium" |
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| 75 | Kvalue*(Outlet.x) = Outlet.y; |
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| 76 | |
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| 77 | case "no": |
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| 78 | "K-values Phase Equilibrium" |
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| 79 | Kvalue = 1; |
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| 80 | |
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| 81 | end |
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| 82 | |
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| 83 | end |
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| 84 | |
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