Heat Pump System Modeling

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BPHE as a CondenserInput from Test BenchInput variables water• Inlet temperature• Inlet pressure• Inlet volume flowInput variables refrigerant• Inlet temperature• Inlet pressure• Mass flowOutput variables water• Outlet temperature• Outlet pressure• Heat flowBPHEOutput variablesrefrigerant• Outlet temperature• Outlet pressure• Heat flowAdditional information• Detailed geometry dataBPHE Brazed Plate Heat Exchanger© IAV · 10/2012 · oka · VI-E22 10
Modeling a BPHE as a CondenserNusselt – Reynolds map for the water sideRefrigerant single – phase flow calculation by Dittus – Boelter correlation forcooling Refrigerant two – phase flow calculation by Shah correlationh: Heat transfer coefficientRe: Reynolds numberPr: Prandtl numberRe L : Liquid phase Reynolds numberPr L : Liquid phase Prandtl numberk: Thermal conductivityD: Characteristic lengthP re : Reduced pressureP: Actual pressureP cr : Critical pressurex: Refrigerant qualityNu L : Liquid phase Nusselt number© IAV · 10/2012 · oka · VI-E22 11
Page 2 and 3: Power [kW] / Waste heat flow [kW]Mo
Page 4 and 5: Pressure [bar]Motivation for Heat P
Page 6 and 7: RadiatorHCHVHConcept for a New Heat
Page 9: Compressor power [kW]Refrigerant Co
Page 14 and 15: Modeling a BPHE as a EvaporatorNuss
Page 16 and 17: Heat Pump System in GT - Suite© IA
Page 18 and 19: Power [kW]Validation of the Heat Pu
Page 20 and 21: Heat flow [kW]Validation of the Hea
Page 22: Thank youOleg KaplanIAV GmbHDomagks

Heat Pump System Modeling

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