技术中心

【英文篇名】 Development of transcritical automobile air conditioning systems using carbon dioxide as refrigerant 【作者中文名】 张会勇; 李俊明; 王补宣; 【作者英文名】 By Zhang Huiyong; Li Junming and Wang Buxuan Tsinghua University; Beijing; China; 【作者单位】 清华大学; 【文献出处】 暖通空调, Hv CO2; 汽车空调; 气体冷却器; 压缩机; 高压侧压力; 【英文关键词】 transcritical cycle; carbon dioxide; automobile air conditioning; gas cooler; compressor; high side pressure; 【摘要】 综述了近年来这种空调系统在理论和实验研究方面取得的主要进展,包括系统各主要部件(压缩机、换热器和节流机构)的发展状况及研究的发展趋向。已有的研究表明,系统的COP存在最大值,而且与气体冷却器出口温度几乎呈正比关系;气体冷却器的出口温度和压缩机的效率是影响系统性能的主要因素;安装内部换热器可以提高系统的性能,尤其是在高压侧压力不高时;当高压侧压力较高时,与气体冷却器和压缩机相比,吸气换热器的影响几乎可以忽略不计。 【英文摘要】 Reviews the main progress in theoretical study and experimental investigation on this system in recent years, including the development of main components (compressor, heat exchanger and expansion device) and the direction of further research. The investigation indicates that as follows. There exists an optimal value of the coefficient of performance (COP) and it is nearly linear with the temperature at the outlet of gas cooler. The temperature at the outlet of gas cooler and the efficiency of compressor ar...