| [277] | 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 | * Authors: Andrey Copat, Estefane S. Horn, Marcos L. Alencastro |
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| 17 | * $Id: turbine.mso 277 2007-06-16 20:17:45Z paula $ |
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| 18 | *--------------------------------------------------------------------*# |
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| 19 | |
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| 20 | using "pressure_changers/flux_machine_basic"; |
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| 21 | |
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| 22 | Model Hidraulic_Turbine as flux_machine_basic |
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| 23 | ATTRIBUTES |
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| 24 | Pallete = true; |
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| 25 | Icon = "HidraulicTurbine"; |
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| 26 | Brief = "Model of a Hidraulic Turbine."; |
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| 27 | Info = |
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| 28 | "Assumptions: |
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| 29 | * Steady State; |
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| 30 | * Only Liquid; |
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| 31 | * Adiabatic; |
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| 32 | * Isentropic. |
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| 33 | |
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| 34 | Specify: |
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| 35 | * the inlet stream; |
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| 36 | * the Pressure Increase (Pdiff) OR the outlet pressure (Outlet.P); |
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| 37 | * the Turbine efficiency (Eff); |
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| 38 | * the Brake efficiency (Meff); |
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| 39 | * the Volumetric expansivity (Beta). |
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| 40 | "; |
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| 41 | |
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| 42 | PARAMETERS |
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| 43 | outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); |
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| 44 | outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); |
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| 45 | Mw(NComp) as molweight (Brief = "Molar Weight"); |
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| 46 | |
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| 47 | VARIABLES |
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| 48 | Eff as efficiency (Brief = "Turbine efficiency"); |
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| 49 | Meff as efficiency (Brief = "Brake efficiency"); |
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| 50 | Beta as positive (Brief = "Volumetric expansivity", Unit = '1/K'); |
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| 51 | Head as head (Brief = "Head Developed"); |
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| 52 | FPower as power (Brief = "Fluid Power"); |
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| 53 | BPower as power (Brief = "Brake Power"); |
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| 54 | EPower as power (Brief = "Eletrical Potency"); |
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| 55 | Pdiff as press_delta (Brief = "Pressure Increase"); |
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| 56 | Pratio as positive (Brief = "Pressure Ratio"); |
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| 57 | Mwm as molweight (Brief = "Mixture Molar Weight"); |
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| 58 | rho as dens_mass (Brief = "Specific Mass"); |
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| 59 | Cp as cp_mol (Brief = "Heat Capacity"); |
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| 60 | |
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| 61 | SET |
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| 62 | Mw = PP.MolecularWeight(); |
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| 63 | |
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| 64 | EQUATIONS |
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| 65 | #Mixtures Properties |
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| 66 | "Calculate Mwm for Inlet Mixture" |
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| 67 | Mwm = sum(Mw*Inlet.z); |
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| 68 | |
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| 69 | "Calculate rho using a External Physical Properties Routine" |
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| 70 | rho = PP.LiquidDensity(Inlet.T,Inlet.P,Inlet.z); |
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| 71 | |
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| 72 | "Calculate Outlet Vapour Fraction" |
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| 73 | Outlet.v = PP.VapourFraction(Outlet.T, Outlet.P, Outlet.z); |
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| 74 | |
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| 75 | "Calculate Cp Using a External Physical Properties Routine" |
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| 76 | Cp = PP.LiquidCp(Inlet.T,Inlet.P,Inlet.z); |
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| 77 | |
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| 78 | #Mass and Energy Balance and Turbine Equations |
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| 79 | "Calculate Outlet Stream Pressure" |
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| 80 | Outlet.P = Inlet.P + Pdiff; |
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| 81 | |
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| 82 | "Pratio Definition" |
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| 83 | Outlet.P = Inlet.P * Pratio; |
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| 84 | |
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| 85 | "Calculate Fluid Power" |
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| 86 | FPower * rho = Pdiff * Inlet.F * Mwm; |
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| 87 | |
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| 88 | "Calculate Brake Power" |
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| 89 | BPower = FPower * Eff; |
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| 90 | |
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| 91 | "Calculate Eletric Power" |
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| 92 | EPower = BPower * Meff; |
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| 93 | |
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| 94 | "Calculate Outlet Temperature" |
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| 95 | (Outlet.T - Inlet.T) * rho * Cp = (Outlet.h - Inlet.h) * rho |
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| 96 | - Pdiff * Mwm * (1-Beta*Inlet.T); |
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| 97 | |
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| 98 | "Calculate Outlet Enthalpy" |
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| 99 | (Outlet.h - Inlet.h) * rho = Pdiff * Mwm; |
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| 100 | |
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| 101 | "Molar Balance" |
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| 102 | Outlet.F = Inlet.F; |
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| 103 | |
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| 104 | "Calculate Outlet Composition" |
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| 105 | Outlet.z = Inlet.z; |
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| 106 | |
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| 107 | "Calculate Head" |
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| 108 | Head * rho = Pdiff; |
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| 109 | end |
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