| The heating performance of a heat pump air conditioning system was researched by experiment and simulation in this paper. The research includes: experimental study of the heating performance of a heat pump air conditioning system for electric vehicles, establishing and verification of the simulation model of a heat pump air conditioning system for electric vehicles, simulations of heat exchanger effects on the heating performance of a heat pump air conditioning for electric vehicles, simulations of compressor,ambient temperature and capillary diameter effects on the heating performance of a heat pump air conditioning for electric vehicles.The test bench of the heat pump air conditioning system was improved in this paper, and the heating performance of the heat pump air conditioning system under different ambient temperature was analyzed. The simulation model of a heat pump air conditioning system for electric vehicles was built by AMESim. The pressure and temperature of the simulation values and experimental values of the heat pump air conditioning system for electric vehicles were compared.The inversion result shows that the average relative error of the various parameters of experimental values and simulation values is in the range of the margin of error. The accuracy of the model was verified, so the simulation mode can be used to analyze the performance of the heat pump air conditioning system for electric vehicles.The heat exchanger, compressor, ambient temperature and the capillary diameter effects on the performance of the heat pump air conditioning system for electric vehicles were analyzed by simulation. The simulation results show that, the system heating capacity increases slightly and the power consumption of compressor decreases significantly with the increase of indoor heat exchanger heat transfer area, and the COP increases greatly. The system heating capacity and the power consumption of compressor increase significantly with the increase of outdoor heat exchanger heat transfer area, and the COP increase is not obvious. The system heating capacity increases slightly,the power consumption of compressor decreases significantly with the increase of indoor heat exchanger fan wind speed, and the COP increases greatly.The system heating capacity and the power consumption of compressor increase significantly with the increase of compressor speed and displacement, and the COP decreases significantly. The system heating capacity increases significantly, the power consumption of compressor with the increase of ambient temperature, and the COP increase slightly. |
