Experimental Investigation on the Performance of Outdoor Heat Exchange in a Heat Pump Air Conditioner for Electric Vehicles
The Outdoor Heat Exchange in a heat pump for electric vehicle is a kind of heat exchanger that can meet the dual needs of evaporation and condensation.With the change of refrigerant pressure and temperature,there is a phase change during the working process of the heat exchanger,and the direct simulation of heat rejection and flow resistance is not only a large amount of calculation,but also difficult to ensure the accuracy.Therefore,in this paper,an Outdoor Heat Exchange with a windward area of 642mm×526mm and a core thickness of 16mm was selected,and the effects of different variables on the heat rejection and flow resistance of the heat exchanger were studied by experimental tests on different outlet positions,different OPM diameters,and different number of separators with hole.For the Outdoor Heat Exchange with the bottom in and up out,the heat rejection in the condensing condition near the outlet position is 3.1%higher than that in the other position,and the evaporation condition is increased by 3.8%.The heat rejection of the experimental core with the larger diameter of the OPM was increased by 15.7%in the evaporation mode.The increased number of separators with hole in the experimental core,and the heat rejection increased by 3.8%.It is hoped that this paper can provide a useful reference for the design of Outdoor Heat Exchange for heat pump system.
Electric VehiclesHeat Pump Air ConditioningOutdoor Heat ExchangeHeating PerformanceRefrigeration Performance
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