Heating performance evaluation of a CO2 heat pump system for an electrical vehicle at cold ambient temperatures

Heating performance evaluation of a CO2 heat pump system for an electrical vehicle at cold ambient temperatures
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电动汽车 CO2 热泵系统在寒冷环境下的加热性能评估

DOI:
10.1016/j.applthermaleng.2018.07.062
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发表时间:
2018-09
影响因子:
6.4
通讯作者:
Chen Jiangping
Chen Jiangping
中科院分区:
工程技术2区
文献类型:
--
作者:
Wang D;ong;Yu Binbin;Li Wanyong;Shi Junye;Chen Jiangping

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提出了一种应用于电动汽车的新型串联气体冷却器(SGC)CO2热泵系统。采用新开发的移动的CO2压缩机,排量为6.8 ml,最高转速为8000 RPM。在低温工况下对该系统的供热性能进行了实验评价。通过对比实验,研究了CO2制冷剂充注量、GC结构和室内回风率等因素对系统制热性能的影响。结果表明,与单气体冷却器(OGC)相比,使用SGC可使供热量和COP分别提高33%和32%。在−20 °C的极冷温度下,新型CO2热泵系统实现了5.6 kW的最大制热量和1.8 COP,大大优于传统的电动汽车PTC加热补充。
A novel CO2heat pump system with Series Gas Cooler (SGC) configuration was proposed for application in an Electrical Vehicle (EV). A newly developed mobile CO2compressor with 6.8 ml displacement and 8000 RPM maximum speed was employed. The heating performance of this CO2heat pump system was experimentally evaluated under low temperature conditions. Comparison experiments were conducted to reveal the effects of CO2refrigerant charge, GC configuration and indoor return air ratio on heating performance characteristics. Results show that using SGC improves the heating capacity and COP by up to 33% and 32%, respectively, compared with One Gas Cooler (OGC). At the extreme cold temperature of −20 °C, the novel CO2heat pump system achieved 5.6 kW maximum heating capacity and 1.8 COP, which greatly outperforms the conventional PTC heating supplement for an EV.
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