变工况条件下的纯电动车热泵系统火用性能分析  

Exergy Performance Analysis of an Electric Vehicle Heat Pump System Under Variable Conditions

作　　者：孙旭东[1] 谷波[1] 田镇[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《上海交通大学学报》2015年第5期608-613,共6页Journal of Shanghai Jiaotong University

基　　金：国家科技支撑项目(2013BAG03B01)资助

摘　　要：基于台架试验数据和热力学第1、2定律,通过改变制冷剂R134a的充注量、室外环境温度和压缩机转速等工况条件,推导出纯电动车热泵系统的性能系数（COP）及其火用损失和火用效率的计算公式,并分析了系统的性能.结果表明：制冷剂R134a的最佳充注量为400g,纯电动车热泵系统总的火用损失为0.61-1.28kW;冷凝器和蒸发器的火用效率较低,分别为37.9%-53.1%、34.2%-61.8%。Based on the experimental data and the first and second law of thermodynamics, outside air tem- perature and compressor speed, the coefficient of performance （COP） and exergy destruction and exergy efficiency of an electric vehicle heat pump system were deduced by changing conditions involving refrigerant （R134a） charge. The results show that the optimum refrigerant charge is at 400 g. The exergy de- struction is within a range of 0.61-1.28 kW. The condenser and the evaporator has a relatively lower ex- ergy efficiency （37.9%-53.1% for condenser and 34.2%-61.8% for evaporator, respectively）.

关 键 词：纯电动车热泵系统 充注量 变工况 火用性能 

分 类 号：TK123[动力工程及工程热物理—工程热物理]