| 摘要: |
| 本文研发了一套CO2跨临界车用热泵空调系统，该系统采用CO2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CO2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CO2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COPh 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 ℃，COPh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。 |
| 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 |
| DOI： |
| 投稿时间：2018-05-25
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| 基金项目:国家自然科学基金（51776119）资助项目。 |
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| Technology Development and Performance Improvement of CO2 Automobile Heat Pump Air-conditioning System |
| Wang Dandong,Chen Jiangping,Yu Binbin,Shi Junye,Li Wanyong,Jiang Fuzheng |
| (Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University;Shanghai High Efficient Cooling System Research Center) |
| Abstract: |
| This study develops a set of CO2 transcritical automobile heat pump air-conditioning systems, which adopts a CO2 vehicle electrical compressor, micro-channel heat exchanger, electronic expansion valve and other key components. This is to overcome technical challenges brought by CO2 automobile’s heat pump air-conditioning system such as high pressure and high exhaust temperature. The effects of the amount of system refrigerant charge on the system performance, circulation characteristics, and the expansion valve opening of the CO2 automobile heat pump air-conditioning are studied in this paper. In addition, this paper proposes a series of indoor heat exchangers to increase the heat transfer capacity of the high-pressure side in the heat pump mode, and experimentally verifies the effect of this 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 coefficient of performance（COPh）of 20-33%. The system can generate 40.4 °C 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 efficiency. |
| Key words: automotive heat pump heating performance experiment co2 refrigerant transcritical cycle electric vehicle |
