인젝션 포트 위치에 따른 전기차용 히트펌프의 성능특성에 대한 해석적 연구

Since driving distance of electric vehicles is limited by battery power, the heating system in electric vehicles significantly impacts its power consumption. A gas injection heat pump can be suggested for improving the heating performance of electric vehicles. This paper presents the development of a simulation program of a gas injection heat pump used in electric vehicles that can be used for system optimization. The simulation program solved mass and energy conservation using thermodynamic governing equations. It was used to analyze the effects of the injection-port variation on the performance characteristic of a heat pump. Performances of the gas injection heat pump were compared with that of a non-injection heat pump. With the increase in the injection-port angle, the improvement of the isentropic efficiency and COP increased.