| 摘要: |
| 针对已提出的电动汽车引射热泵空调（EHPAC）系统进行改进，将车内、外侧换热器设计成前后排分离的形式，并加设引射器，形成梯级蒸发并回收膨胀功，从而提高系统的性能。实验研究了夏季及冬季工况下车内、外温度对EHPAC系统制冷及制热性能的影响，验证了引射器的使用可大幅提高汽车热泵系统的制热性能。将EHPAC系统与传统热泵系统（THPAC）进行对比，结果表明：对不同的车内、外温度工况，EHPAC系统的制冷及制热性能均优于THPAC系统，制冷量提高约21.5%~35.7%、制冷COP提高约13.1%~21.7%、制热量提高约4.4%~14.5%、制热COP提高约11.3%~18.3%。同时表明车内温度的改变对EHPAC系统性能的影响比车外温度的影响更大。 |
| 关键词: 电动汽车 热泵空调系统 引射器 变工况性能 |
| DOI： |
| Received:October 12, 2022Revised:December 15, 2022 |
| 基金项目:国家自然科学基金（51176142）资助项目 |
|
| Experimental Study on Performance of Ejector Heat Pump Air Conditioning System for Electric Vehicle |
|
Liu Junjun, Guo Xianmin, Du Xiaolu
|
| (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce) |
| Abstract: |
| To improve the existing ejector heat pump air conditioning (EHPAC) system for electric vehicles, indoor and outdoor heat exchangers were designed to be separated from the front and rear rows, and ejectors were added to achieve cascade evaporation and recover the expansion work. The performance of the system was thus improved. The influences of the indoor and outdoor temperatures of the vehicle on the cooling and heating performances of the EHPAC system under summer and winter conditions were experimentally studied. The verification results show that the use of ejectors can significantly improve the heating performance of heat pump systems in vehicles. Compared with the traditional heat pump air conditioning (THPAC) system for electric vehicles, the cooling and heating performances of the EHPAC system are better at different vehicle indoor and outdoor temperature conditions. The cooling capacity increases by approximately 21.5%–35.7%. The cooling coefficient of performance (COP) increases by approximately 13.1%–21.7%. The heating capacity increases by approximately 4.4%–14.5%, and the heating COP increases by approximately 11.3%–18.3%. This also indicates that the performance of the EHPAC system is more sensitive to the indoor temperature of the vehicle than the outdoor temperature. |
| Key words: electric vehicle heat-pump air conditioning system ejector variable operating characteristics |
