| 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 632 2008-09-23 22:20:38Z bicca $ |
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| 17 | *--------------------------------------------------------------------*# |
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| 18 | |
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| 19 | using "streams"; |
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| 20 | |
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| 21 | Model heater_basic |
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| 22 | |
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| 23 | ATTRIBUTES |
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| 24 | Pallete = false; |
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| 25 | Brief = "Basic model for Heater or Cooler Operation"; |
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| 26 | Info = |
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| 27 | "Determines thermal and phase conditions of an outlet stream. |
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| 28 | "; |
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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 | Kvalues as Switcher (Brief="Option for Display Phase Equilibrium K-values",Valid=["yes","no"], Default="yes"); |
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| 34 | |
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| 35 | VARIABLES |
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| 36 | Duty as power (Brief = "Actual Duty",Symbol="Q_{Duty}"); |
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| 37 | Vfrac as fraction (Brief = "Vapor fraction Outlet Stream",Symbol="V_{frac}"); |
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| 38 | Lfrac as fraction (Brief = "Liquid fraction Outlet Stream",Symbol="L_{frac}"); |
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| 39 | Kvalue(NComp) as Real (Brief = "Phase Equilibrium K-values",Lower=1E-30,Upper=1E30,Symbol="K_{value}"); |
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| 40 | Pratio as positive (Brief = "Pressure Ratio", Symbol ="P_{ratio}"); |
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| 41 | Pdrop as press_delta (Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P"); |
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| 42 | |
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| 43 | in Inlet as stream (Brief = "Inlet Stream", PosX=0, PosY=0.45, Symbol="^{in}"); |
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| 44 | out Outlet as streamPH (Brief = "Outlet Stream", PosX=1, PosY=0.45, Symbol="^{out}"); |
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| 45 | |
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| 46 | EQUATIONS |
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| 47 | |
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| 48 | "Flow" |
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| 49 | Outlet.F = Inlet.F; |
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| 50 | |
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| 51 | for j in [1 : NComp] |
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| 52 | |
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| 53 | "Composition" |
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| 54 | Outlet.F*Outlet.z(j) = Inlet.F*Inlet.z(j); |
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| 55 | |
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| 56 | end |
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| 57 | |
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| 58 | "Vapor fraction Outlet Stream" |
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| 59 | Vfrac = Outlet.v; |
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| 60 | |
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| 61 | "Liquid fraction Outlet Stream" |
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| 62 | Lfrac = 1-Vfrac; |
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| 63 | |
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| 64 | "Heat Duty" |
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| 65 | Duty = Outlet.F*Outlet.h - Inlet.F*Inlet.h; |
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| 66 | |
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| 67 | "Pressure Drop" |
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| 68 | Outlet.P = Inlet.P - Pdrop; |
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| 69 | |
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| 70 | "Pressure Ratio" |
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| 71 | Outlet.P = Inlet.P * Pratio; |
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| 72 | |
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| 73 | switch Kvalues # Fix for better convergence !!! |
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| 74 | |
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| 75 | case "yes": |
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| 76 | "K-values Phase Equilibrium" |
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| 77 | Kvalue*Outlet.x = Outlet.y; |
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| 78 | |
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| 79 | case "no": |
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| 80 | "K-values Phase Equilibrium" |
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| 81 | Kvalue = 1; |
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| 82 | |
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| 83 | end |
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| 84 | |
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| 85 | end |
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| 86 | |
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| 87 | Model heater as heater_basic |
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| 88 | |
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| 89 | ATTRIBUTES |
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| 90 | Pallete = true; |
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| 91 | Icon = "icon/heater"; |
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| 92 | Brief = "Heater"; |
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| 93 | Info = |
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| 94 | "Determines thermal and phase conditions of an outlet stream. |
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| 95 | |
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| 96 | == Specify == |
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| 97 | * The Inlet stream |
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| 98 | * Specify: |
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| 99 | **The outlet temperature and the outlet pressure or |
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| 100 | ** The outlet temperature and the inlet energy stream or |
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| 101 | ** The outlet pressure and the inlet energy stream |
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| 102 | "; |
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| 103 | |
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| 104 | VARIABLES |
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| 105 | |
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| 106 | in Heat as energy_stream (Brief ="Inlet Heat Stream", PosX=0.5, PosY=1, Symbol="_{out}"); |
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| 107 | |
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| 108 | EQUATIONS |
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| 109 | |
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| 110 | "Duty Specification" |
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| 111 | Heat.Q = Duty; |
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| 112 | |
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| 113 | end |
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| 114 | |
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| 115 | Model cooler as heater_basic |
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| 116 | |
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| 117 | ATTRIBUTES |
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| 118 | Pallete = true; |
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| 119 | Icon = "icon/cooler"; |
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| 120 | Brief = "Cooler"; |
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| 121 | Info = |
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| 122 | "Determines thermal and phase conditions of an outlet stream. |
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| 123 | |
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| 124 | == Specify == |
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| 125 | * The Inlet stream |
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| 126 | * Specify: |
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| 127 | **The outlet temperature and the outlet pressure or |
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| 128 | ** The outlet temperature and the inlet energy stream or |
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| 129 | ** The outlet pressure and the inlet energy stream |
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| 130 | "; |
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| 131 | |
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| 132 | VARIABLES |
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| 133 | |
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| 134 | in Heat as energy_stream (Brief ="Inlet Heat Stream", PosX=0.5, PosY=1, Symbol="_{out}"); |
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| 135 | |
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| 136 | EQUATIONS |
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| 137 | |
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| 138 | "Duty Specification" |
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| 139 | Heat.Q = -Duty; |
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| 140 | |
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| 141 | end |
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