Experimental study of propane heat pump system with secondary loop and vapor injection for electric vehicle application in cold climate

作     者：Wang, Haimin Ji, Zhiyuan Wang, Chuanwei Zhu, Zexu Wang, Yifan Lin, Hao 

作者机构：Univ Shanghai Sci & Technol Sch Energy & Power Engn Shanghai 200093 Peoples R China Shanghai Key Lab Multiphase Flow & Heat Transfer P Shanghai 200093 Peoples R China Dongfeng Commercial Vehicle Co Ltd Dongfeng Commercial Vehicle Tech Ctr Wuhan 430056 Peoples R China 

出 版 物：《APPLIED THERMAL ENGINEERING》 (实用热力工程)

年 卷 期：2022年第217卷

核心收录：

学科分类：0820[工学-石油与天然气工程] 080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：National Key R & D Program of China [2018YFB0104400] National Natural Science Foun- dation of China 

主　　题：Electric vehicle Propane Heat pump Vapor injection Secondary loop 

摘      要：In order to solve the problem that the driving range of electric vehicles (EVs) is reduced due to heating in cold climate, and the traditional R134a needs to be replaced by more environmentally-friendly refrigerants, a novel solution of coupling the secondary loop and vapor injection technology (SL + VPI) was proposed. Although propane has high flammability, it is still considered a promising alternative because of its low global warming potential (GWP), high performance, and less charge mass. The impacts of VPI technology, ambient temperature, waste heat recovery power, compressor speed, indoor inlet air flow rate, and charge mass on the heat pump system performance have been experimentally studied. In addition, the heating performance and driving range improvement of different heat pump systems were compared. The results show that at-20 C ambient tem-perature, the propane SL + VPI system was second only to CO2 direct heat pump system;its heating performance was 33.3-37.4 % greater than the propane direct heat pump.