Heat Pump System Modeling

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Heat flow [kW]Validation of the Heat Pump ModelRadiator Heat Flow2.22.01.81.61.41.21.00.80.60.40.20.0Without wasteheat flowTestTestWith 0.7 kW wasteheat flowSimulationSimulation@ -10 °C2000 U/min@ 0°C5000 U/min@ 5°C5000 U/minOperating pointBoundary conditions• Air flow heater core: 300 kg/h• Air flow radiator: 1600 kg/h• EXV target SH: 5 K• Maximum deviation in heatflow calculation: < 0.4 kW• Mean deviation in heat flowcalculation: < 0.3 kWAccurate results at all testpoints© IAV · 10/2012 · oka · VI-E22 20
ConclusionPresented concept• Promising system approach• New components were introducedHeat pump modeling and simulation:• Modeling of components and of system was achieved• Accurate results both on component and system level• Advantages compared to conventional heater were shown by test data and simulationOutlook• Further know-how development and investigation on transient behavior• Comparison to air / refrigerant heat pumps• Cabin modeling and integration into thermal vehicle simulation© IAV · 10/2012 · oka · VI-E22 21
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 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 22: Thank youOleg KaplanIAV GmbHDomagks

Heat Pump System Modeling

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