Experimental research on refrigeration performance of air conditioning system of pure electric passenger cars with economizer

Abstract

Aiming at solving the problems of the high compressor discharge temperature, the high discharge pressure, the insufficient cooling capacity, and the reduced system efficiency in the air-conditioning system of pure electric passenger cars in the summer high temperature environment, this paper develops a low pressure economizer using the principle of the quasi-two-stage compression cycle. The heat pump air conditioning system of the air-supplemented pure electric passenger car is set up to study its refrigeration performance. The results show that in a high environment temperature of 50?C, compared with the non-supplemented system, the discharge temperature in the low pressure supplemental gas system drops by 13.54?C, the refrigeration capacity reduces by 2.0%, the compressor power drops by 3.4%, and the refrigeration coefficient increases by 1.4%.