CO_2车用热泵空调系统技术研发及性能提升  

Technology Development and Performance Improvement of CO_2 Automobile Heat Pump Air-conditioning System

作　　者：王丹东[1] 陈江平[1,2] 俞彬彬 施骏业 李万勇[1] 蒋甫政 Wang Dandong;Chen Jiangping;Yu Binbin;Shi Junye;Li Wanyong;Jiang Fuzheng(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai,200240,China;ShanghaiHigh Efficient Cooling System Research Center,Shanghai,200240,China)

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240 [2]上海高效冷却系统工程技术中心,上海200240

出　　处：《制冷学报》2018年第5期47-52,共6页Journal of Refrigeration

基　　金：国家自然科学基金(51776119)资助项目~~

摘　　要：本文研发了一套CO_2跨临界车用热泵空调系统,该系统采用CO_2车用电动压缩机、微通道换热器、电子膨胀阀等关键部件,克服了CO_2车用热泵空调系统高压和高排气温度的技术挑战。实验研究了系统充注量对CO_2车用热泵空调系统性能、循环特征及膨胀阀开度的影响。提出在热泵模式下将室内换热器串联来提高高压侧的换热能力,并实验验证了该方法对车用热泵空调系统性能的提升作用。结果表明:相比于单一气冷器,采用串联气冷器的车用热泵空调系统的制热量和COP_h分别提升了17%～31%和20%～33%;该系统在-20℃全新风环境下,出风温度可达40.4℃,COP_h为1.8。因此该系统能够满足电动汽车在低温环境下的乘客舒适性和整车负荷需求,且在制热能效方面优势显著。This study develops a set of CO2 transcritical automobile heat pump air-conditioning systems, which adopts a CO2 vehicle elec？trical compressor, micro-channel heat exchanger, electronic expansion valve and other key components. This is to overcome technicalchallenges brought by CO2 automobile′ s heat pump air？conditioning system such as high pressure and high exhaust temperature. Theeffects of the amount of system refrigerant charge on the system performance, circulation characteristics, and the expansion valve openingof the CO2 automobile heat pump air-conditioning are studied in this paper. In addition, this paper proposes a series of indoor heat ex？changers to increase the heat transfer capacity of the high？pressure side in the heat pump mode, and experimentally verifies the effect ofthis method on automobile heat pump air？conditioning system performance. Results show that compared with the single gas cooler, the automobile heat pump air？conditioning system with series gas coolers achieves an increase in heating capacity of 17% - 31% and coefficientof performance（COPh）of 20% - 33%. The system can generate 40.4 ℃ gas cooler outlet air and COPh = 1. 8 under the environment of- 20 ℃ fresh air mode. Therefore, the developed CO2 automobile heat pump air？conditioning system can satisfy passenger comfort and vehicle load demand under a low-temperature environment for electric vehicles and has a very significant advantage in heating energy effi？ciency.

关 键 词：车用热泵 制热性能测试 CO2制冷剂 跨临界循环 电动汽车 

分 类 号：TQ051.5[化学工程] TU831.3[建筑科学—供热、供燃气、通风及空调工程]