Changeset 595
- Timestamp:
- Aug 8, 2008, 6:55:17 PM (14 years ago)
- Location:
- branches/gui
- Files:
-
- 4 edited
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eml/pressure_changers/compressor.mso (modified) (1 diff)
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eml/pressure_changers/icon/CentrifugalCompressor.png (modified) (previous)
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eml/pressure_changers/icon/CentrifugalCompressor.svg (modified) (5 diffs)
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sample/pressure_changers/sample_compressor.mso (modified) (3 diffs)
Legend:
- Unmodified
- Added
- Removed
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branches/gui/eml/pressure_changers/compressor.mso
r393 r595 21 21 22 22 Model centrifugal_compressor 23 ATTRIBUTES 23 24 ATTRIBUTES 24 25 Pallete = true; 25 26 Icon = "icon/CentrifugalCompressor"; 26 Brief = "Model of a centrifugal compressor."; 27 Info = 28 "== Assumptions == 29 * Steady State; 30 * Only Vapor; 31 * Adiabatic. 27 Brief = "Testing Model of a centrifugal compressor."; 28 32 29 33 == Specify == 34 * the inlet stream; 35 * the outlet pressure (Outlet.P); 36 * the Isentropic efficiency (Effs). 37 "; 38 39 PARAMETERS 40 outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); 41 outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); 42 R as positive (Default = 8.31451, Brief = "Constant of Gases", Unit= 'kJ/kmol/K'); 30 PARAMETERS 31 32 outer PP as Plugin (Brief = "External Physical Properties", Type="PP"); 33 outer NComp as Integer (Brief = "Number of chemical components", Lower = 1); 34 R as positive (Brief = "Constant of Gases", Unit= 'kJ/kmol/K', Default = 8.31451,Hidden=true); 43 35 Mw(NComp) as molweight (Brief = "Molar Weight"); 44 36 45 VARIABLES 46 n as positive (Brief = "Politropic Coefficient", Lower=0); 47 k as positive (Brief = "Isentropic Coefficient", Lower=1e-3); 48 Cp as cp_mol (Brief = "Heat Capacity"); 49 Cv as cv_mol (Brief = "Heat Capacity"); 37 VARIABLES 38 39 n as positive (Brief = "Politropic Coefficient", Lower=0); 40 k as positive (Brief = "Isentropic Coefficient", Lower=1e-3); 41 Cp as cp_mol (Brief = "Heat Capacity"); 42 Cv as cv_mol (Brief = "Heat Capacity"); 50 43 Pratio as positive (Brief = "Pressure Ratio", Symbol ="P_{ratio}"); 51 44 Pdrop as press_delta (Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P"); 52 45 Wp as energy_mol (Brief = "Politropic Head"); 53 46 Ws as energy_mol (Brief = "Isentropic Head"); 54 Tiso as temperature (Brief = "Isentropic Temperature"); 55 Effp as positive (Brief = "Politropic efficiency"); 56 Effs as efficiency (Brief = "Isentropic efficiency"); 57 FPower as power (Brief = "Fluid Power"); 58 Mwm as molweight (Brief = "Mixture Molar Weight"); 59 in Inlet as stream (Brief = "Inlet stream", PosX=0, PosY=0.5086, Symbol="_{in}"); 60 out Outlet as streamPH (Brief = "Outlet stream", PosX=1, PosY=0.5022, Symbol="_{out}"); 47 Tiso as temperature (Brief = "Isentropic Temperature"); 48 Effp as positive (Brief = "Politropic efficiency"); 49 Effs as efficiency (Brief = "Isentropic efficiency"); 50 FPower as power (Brief = "Fluid Power"); 51 Mwm as molweight (Brief = "Mixture Molar Weight"); 61 52 62 SET 53 in Inlet as stream (Brief = "Inlet stream", PosX=0.35, PosY=0, Symbol="_{in}"); 54 out Outlet as streamPH (Brief = "Outlet stream", PosX=1, PosY=0.85, Symbol="_{out}"); 55 56 in WorkIn as power (Brief = "Work Inlet", PosX=0, PosY=0.55); 57 58 SET 59 63 60 Mw = PP.MolecularWeight(); 64 65 EQUATIONS 66 67 "Calculate Mwm for Inlet Mixture" 61 62 R = 8.31451*'kJ/kmol/K'; 63 64 EQUATIONS 65 66 "Calculate Mwm for Inlet Mixture" 68 67 Mwm = sum(Mw*Inlet.z); 69 68 70 69 "Pressure Ratio" 71 70 Outlet.P = Inlet.P * Pratio; 72 71 73 72 "Pressure Drop" 74 73 Outlet.P = Inlet.P - Pdrop; 75 74 76 75 "Calculate Cp Using a External Physical Properties Routine" 77 76 Cp = PP.VapourCp(Inlet.T,Inlet.P,Inlet.z); 78 77 79 78 "Calculate Cv Using a External Physical Properties Routine" 80 79 Cv = PP.VapourCv(Inlet.T,Inlet.P,Inlet.z); 81 80 82 81 "Calculate Isentropic Coeficient" 83 82 k * Cv = Cp; 84 83 85 84 "Calculate Isentropic Head" 86 85 Ws = (k/(k-1))*R*Inlet.T*((Outlet.P/Inlet.P)^((k-1)/k) - 1); 87 86 88 87 "Calculate Isentropic Outlet Temperature" 89 88 # Tiso = Inlet.T * (Outlet.P/Inlet.P)^((k-1)/k); 90 PP.VapourEntropy(Tiso, Outlet.P, Outlet.z) = 91 PP.VapourEntropy(Inlet.T, Inlet.P, Inlet.z); 89 PP.VapourEntropy(Tiso, Outlet.P, Outlet.z) = PP.VapourEntropy(Inlet.T, Inlet.P, Inlet.z); 92 90 93 91 "Calculate Real Outlet Temperature" 94 92 Effs * (Outlet.T- Inlet.T) = (Tiso - Inlet.T); 95 93 96 94 "Calculate Politropic Coefficient" 97 95 n*(ln(Outlet.T/Inlet.T)) = (n-1)*(ln(Outlet.P/Inlet.P)); 98 96 99 97 "Calculate Politropic Efficiency" 100 98 Effp * (n-1) * k = n * (k-1); 101 99 102 100 "Calculate Politropic Head" 103 101 Ws*Effp = Wp*Effs; 104 102 105 "Calculate Fluid Power" 106 FPower*Effs = Inlet.F*Ws; 107 108 "Overall Molar Balance" 103 "Overall Molar Balance" 109 104 Outlet.F = Inlet.F; 110 105 111 106 "Component Molar Balance" 112 107 Outlet.z = Inlet.z; 108 109 # Testing Equations 110 111 "Fluid Power" 112 FPower*Effs = Inlet.F*Ws; 113 114 "Fluid Power" 115 FPower = WorkIn; 116 113 117 end -
branches/gui/eml/pressure_changers/icon/CentrifugalCompressor.svg
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branches/gui/sample/pressure_changers/sample_compressor.mso
r585 r595 28 28 FlowSheet compressor_C1 29 29 30 DEVICES31 S1 as source;32 C1 as centrifugal_compressor;33 34 CONNECTIONS35 S1.Outlet to C1.Inlet;36 37 30 PARAMETERS 38 31 PP as Plugin (Brief="External Physical Properties", … … 44 37 NComp as Integer (Default= 1); 45 38 39 DEVICES 40 S1 as source; 41 W1 as work_source; 42 C1 as centrifugal_compressor; 43 44 CONNECTIONS 45 S1.Outlet to C1.Inlet; 46 W1.Work to C1.WorkIn; 47 48 46 49 SET 47 50 NComp = PP.NumberOfComponents; 48 51 49 S1.ValidPhases = " Liquid-Only";52 S1.ValidPhases = "Vapour-Only"; 50 53 S1.CompositionBasis = "Molar"; 51 54 … … 59 62 C1.Outlet.P = 3 * 'atm'; 60 63 end 64 65 FlowSheet compressor_C2 66 67 PARAMETERS 68 PP as Plugin (Brief="External Physical Properties", 69 Type="PP", 70 Components = ["propane"], 71 LiquidModel = "IdealLiquid", 72 VapourModel = "Ideal" 73 ); 74 NComp as Integer (Default= 1); 75 76 DEVICES 77 S1 as source; 78 C1 as centrifugal_compressor; 79 80 CONNECTIONS 81 S1.Outlet to C1.Inlet; 82 83 84 SET 85 NComp = PP.NumberOfComponents; 86 87 S1.ValidPhases = "Vapour-Only"; 88 S1.CompositionBasis = "Molar"; 89 90 SPECIFY 91 C1.Effs = 0.75; 92 S1.F = 41.05 * 'kmol/h'; 93 S1.P = 1 * 'atm'; 94 S1.T = 298 * 'K' ; 95 S1.Composition = [01]; 96 97 C1.Outlet.P = 3 * 'atm'; 98 end
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