Performance of Automotive Ultra-Low Temperature Economized Vapor
 Injection Heat Pump Air Conditioning Using R1234yf Refrigerant

doi:10.16183/j.cnki.jsjtu.2019.244

Abstract

Abstract: In this paper, an automotive ultra-low temperature heat pump air conditioning system based on the economized vapor injection (EVI) technology is proposed. The new low-global warming potential (GWP) R1234yf is used as the refrigerant. Besides, the comparative performance test in R134a and system optimization are conducted. In the ultra-low temperature environment of -20℃, the heating performance and coefficient of performance (COP) of this system can reach 2kW and 2.0, which is 30% and 14% higher than those of the traditional heat pump. Thus, the system can meet the heating requirements of crew cabin in a low temperature environment. The heating capacity of the R1234yf system is a little bit lower but pretty much the same as R134a. Moreover, the effect of EVI for R1234yf refrigerant is better than that of R134a. Increasing the inner-condenser area and optimizing components, such as outdoor heat exchanger and compressor, can significantly improve heat pump air conditioning system performance and its energy efficiency.

CLC Number:

U 469.72

LIU Yusheng,LI Wanyong,ZHANG Li,SHI Junye,CHEN Jiangping. Performance of Automotive Ultra-Low Temperature Economized Vapor Injection Heat Pump Air Conditioning Using R1234yf Refrigerant[J]. Journal of Shanghai Jiaotong University, 2020, 54(10): 1108-1116.

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Performance of Automotive Ultra-Low Temperature Economized Vapor Injection Heat Pump Air Conditioning Using R1234yf Refrigerant

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