• 学报（中文） •

### 跨临界CO2电动汽车空调系统性能分析

1. 1. 上海交通大学 制冷与低温工程研究所， 上海 200240； 2. 南京航空航天大学 能源与动力学院， 南京 210000
• 出版日期:2019-07-28 发布日期:2019-08-02
• 通讯作者: 陈江平,男,教授,博士生导师,电话(Tel.):021-62933242; E-mail:jpchen_sjtu@163.com.
• 作者简介:俞彬彬(1994-),男,江苏省启东市人,硕士生,主要从事汽车空调技术研究. E-mail:ybbedc@sjtu.edu.cn.
• 基金资助:
国家自然科学基金资助项目（51776119）

### Performance Analysis of a Trans-Critical CO2 Air Conditioning System for Electric Vehicle

YU Binbin 1,WANG Dandong 1,XIANG Wei 2,YU Haohong 2,CHEN Jiangping 1

1. 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China; 2. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210000, China
• Online:2019-07-28 Published:2019-08-02

Abstract: In order to meet the needs of environmental protection and closely follow the development trend of electric vehicles, a CO2 air conditioning system for electric vehicle was developed based on the traditional air conditioning system of vehicle, the effects of different operating parameters on its performance were studied on the standard mobile air conditioning bench in order to see the new rules and provide guidance for the optimization of key components. Results show that the performance of the developed CO2 system can match the traditional refrigerant R134a, which is still commonly used. Among all the operating parameters, it was found that the outdoor temperature has the greatest impact on the system performance, and the performance decay is obvious under high temperature. The electric compressor can meet the cooling capacity needs of a real car, in some harsh conditions, system performance can not be optimal because of the discharge pressure and temperature limits of the existing CO2 electric compressor, so there is much space for system performance improvement by optimizing the compressor. If the temperature difference between the refrigerant and environment at the outlet of gas cooler can drop by 1℃ for the same heat exchange area, the COP of the system can be increased by 2%～5%, the optimal high pressure of the system can be reduced as well, if the evaporation temperature can increase by 5℃, the COP of the system can be increased by 15%.