Heat Pump System Modeling

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Modeling a BPHE as a EvaporatorNusselt – Reynolds map for the water sideRefrigerant single – phase flow calculation by Dittus – Boelter correlation forheating Refrigerant two – phase flow calculation by Klimenko correlationh: Heat transfer coefficientRe: Reynolds numberPr: Prandtl numberPr L : Liquid phase Prandtl numberk: Thermal conductivityD: Characteristic lengthρ L : Liquid densityρ V : Vapor densityk l : Liquid thermal conductivityk w : Wall material thermal conductivity© IAV · 10/2012 · oka · VI-E22 14
Simulation [%]BPHE as an EvaporatorSimulation vs. Test10080Heat flow evaporator+ 10 %6040- 10 %2000 20 40 60 80 100Test [%]• Mean deviation in power calculation: 0.1 kWAccurate results at all performance map points© IAV · 10/2012 · oka · VI-E22 15
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 and 10: Compressor power [kW]Refrigerant Co
Page 11 and 12: Modeling a BPHE as a CondenserNusse
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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