Effect of R407C Refrigerant Charge on the Performance of Lightweight Automotive Heat Pump System
[Purposes]This paper aims to investigate the effect of different charging rates of R407C refrig-erant on the cooling performance of lightweight automotive heat pump air-conditioning systems.[Meth-ods]Under the high temperature 45℃ working condition,the influence of different refrigerant systems on the refrigeration performance parameters is analyed through the change of charging volume to deter-mine the optimal charging volume.[Findings]The results show that when the charge of R407C refriger-ant is increased from 2.3 kg to 2.6 kg,the highest values of cooling capacity and COP of the system reach 4.935 kW and 2.1 respectively,and the optimum charge of the system is 2.5 kg.[Conclusions]By chang-ing the refrigerant charge,the cooling capacity,COP and supercooling degree are improved.Therefore,in the development of new environmentally friendly refrigerants and their application systems,the perfor-mance under different operating conditions should be fully considered and the optimal operating param-eters should be determined through experimental verification.
heat pump air conditionerR407Coptimal refrigerant charge
万方数据
维普
