跨临界CO2新能源汽车空调逆循环化霜实验研究  

An Experimental Investigation On Reverse Cycle Defrosting Performances Of Transcritical CO2 Automobile Air Conditioning System

作　　者：孙西峰 王静[1] 方健珉 殷翔[1] 曹锋[1] SUN Xi-feng;WANG Jing;FANG Jian-min;YIN Xiang;CAO Feng(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Dongfeng Motor Corporation Technical Center,Wuhan 430056,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]东风汽车集团有限公司技术中心,武汉430056

出　　处：《汽车科技》2020年第3期9-15,共7页Auto Sci-Tech

摘　　要：本文搭建了采用逆循环化霜的跨临界CO2电动汽车空调系统实验台。通过对各参数点温度和压力变化的分析,研究了空调系统在结霜过程的性能和参数变化特性。通过记录化霜时间和实时霜层摄像探究了化霜的效果,进行连续结霜-化霜实验,探究了首次化霜对二次结霜情况和化霜时间的影响。实验结果表明,空调系统连续运行结霜150min后,制热量分别下降22.6%和15.6%。第二次结霜速度比第一次更慢,第一次化霜时长为420s,第二次化霜时长为120s,仅为第一次化霜时间的28.5%。逆循环化霜效果十分理想,将成为未来电动汽车空调最合理有效的化霜方式之一。A test rig of transcritical CO2 automobile air conditioning system with reverse cycle defrosting was built to investigate the performance and parameters variation characteristics during the frosting process by analyzing the changes in temperature and pressure at various parameter points.The reverse cycle defrosting method is adopted,and the defrosting performance was investigated by recording the defrosting time and taking a realtime photo of the frost layer.The continuous frosting-defrosting experiment was carried to research the effect of the first defrosting on the second frosting speed and defrosting time.The experimental results indicates that the heating capacity was reduced by 22.6% and 15.6% respectively after the air conditioning system continuously run for 150 minutes.The second frost is slower than the first time,the fist defrosting time was 420s,the second was 120s,which is only the 28.5% of the first time.The defrost performance is really ideal and the reverse cycle defrosting method will be one of the most promising defrosting methods in the future.

关 键 词：CO2 逆循环化霜 新能源汽车空调 无间断连续结霜 

分 类 号：TK111[动力工程及工程热物理—热能工程]