TY - JOUR
TI - Study on quasi two-stage compression cycle characteristics of the water heater of the air source heat pump in cold area
AU - Li Haijun
AU - Su Zhiyong
AU - Niu Huawei
AU - Zhai Junjie
AU - Kou Jingkang
AU - Wang Fang
AU - Cai Xia
AU - Zhang Qingge
AU - Wang Shihao
JN - Thermal Science
PY - 2022
VL - 26
IS - 3
SP - 2645
EP - 2651
PT - Article
AB - The water heater of an air source heat pump has the disadvantages of high  exhaust temperature and weak heating performance in a cold area. The quasi  two-stage compression cycle technology can effectively improve its operation  characteristics in the cold area. In this paper, a rotor compressor with a  medium pressure air supply is used to develop the water heater with R410A  as the circulating working fluid. The system's heating performance under low  temperature environments is experimentally studied. The results show that  the exhaust temperature of the water heater system with the medium pressure  air supply is lower than those without the air-supply system.