制冷学报2025，Vol.46Issue(2)：28-37,10.DOI:10.12465/j.issn.0253-4339.2025.02.028
新能源车辆跨临界CO2热泵空调系统主要性能提升方法对比
Comparative Study on the Main Performance Improvement Methods of Transcritical CO2 Heat Pump Air-Conditioning System for New Energy Vehicles
摘要
Abstract
Transcritical CO2 heat pump air-conditioning systems have gained prominence in new energy vehicle thermal management due to their energy-saving and environmentally friendly characteristics.However,the relatively low coefficient of performance(COP)in cooling mode remains a significant obstacle to developing transcritical CO2 heat pump air conditioning systems.To enhance system performance,five technical approaches are proposed:internal heat exchangers(IHX),expanders,vortex tubes,ejectors,and combined multiple evaporation steps with vapor injection.The performances of these methods were evaluated through one-dimensional theoretical calculations under vehicle operating conditions.Results indicate that optimizing discharge pressure is critical for all methods,with varying degrees of COP improvement.Expanders provide the most comprehensive benefits,ejectors perform well under specific design conditions,IHX shows notable enhancements in cooling mode,and vortex tubes and combined multiple evaporation steps with vapor injection exhibit broad adaptability across working conditions.These findings offer valuable insights for practical engineering applications and support the adoption of transcritical CO2 heat pump systems in new energy vehicles.关键词
新能源车辆/跨临界CO2/热泵空调系统/性能提升方法Key words
new energy vehicles/transcritical CO2/heat pump air-conditioning system/performance improvement methods引用本文复制引用
杨梦莹,丁静雯,谢宏生,宋昱龙,曹锋,戴向阳..新能源车辆跨临界CO2热泵空调系统主要性能提升方法对比[J].制冷学报,2025,46(2):28-37,10.基金项目
本文受广东省重点领域研发计划项目(2023B0909050005)、中汽中心"科技专项002"项目(22240577-1)和"面向比亚迪汽车工业有限公司系统仿真场景的MBSE软件攻关项目"(2022GG037)资助.(The project was supported by the Key-Area Research and Development Program of Guangdong Prov-ince(No.2023B0909050005),"Science and Technology Special Project 002"(No.22240577-1)and"MBSE Software Research Project for System Simulation Scenarios of BYD Automotive Indus-try Co.,Ltd."of CATARC(No.2022GG037).) （2023B0909050005）
