摘要
开发CO_2跨临界汽车热泵,是解决R134a汽车热泵在低温环境下制热量不足、无法正常工作问题的有效措施。本文理论分析了影响CO_2汽车热泵性能的关键因素,在最低为-20℃的环境温度下实验研究了CO_2汽车热泵的性能。结果表明:开发的CO_2汽车热泵系统在低温环境下稳定运行,具有较好的制热性能;在相同压缩机转速条件下,室内进风温度对制热COP(COP_h)影响更大,室外环境温度对制热量影响更大;在-20℃环境冷启动工况下COP_h可达到3.15、制热量为3.6 k W;进风(Tg,a,in)和出风(Tg,a,out)温度分别为20℃和40℃时,COP_h最低为1.72。因此,与R134a相比,CO_2车用热泵系统的低温制热性能有显著的优势,该系统在电动汽车上具有较好的应用潜力。
Automotive heat pump systems with the R134a refrigerant cannot provide sufficient heating capacity and even stop working in a low ambient temperature.Developing a transcritical C02automotive heat pump system would be an effective method to solve this problem.This study theoretically analyzed the impacts of key factors on the performance of a C02heat pump system,and experimentally investigated the developed heat pump in a-20environment.Experimental results showed that the developed heat pump system ran stably at low temperatures and had a good heating performance.Under the same compressor speed,the indoor environment temperature had a greater impact on the heating coefficient of performance(C0Ph),while the outdoor environment temperature had a greater impact on the heating capacity.Under a cold condition at-20,the C0Ph reached3.15and the heating capacity reached3.6kW.When the indoor inlet andoutlet air temperatures are20°C and40°C,respectively,the C0Ph was at least1.72.Therefore,compared to R134a,the C02heat pump system has a great heating performance in a low temperature environment,and thus has good application potential for electric vehicles.
作者
王丹东
张科
俞彬彬
胡记超
陈亮
施骏业
陈江平
Wang Dandong;Zhang Ke;Yu Binbin;Hu Jichao;Chen Liang;Shi Junye;Chen Jiangping(Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China;Shanghai High Efficient Cooling System Research Center, Shanghai,200240,China)
出处
《制冷学报》
CAS
CSCD
北大核心
2018年第2期14-21,共8页
Journal of Refrigeration
关键词
车热泵
制热性能测试
C02制冷剂
跨临界循环
电动汽车
automotive heat pump
heating performance experiment
C02 refrigerant
transcritical cycle
electric vehicle
