TY - JOUR
TI - Experimental study on high temperature heat pump system with a double heat source cascade
AU - Bai Jing
AU - Jia Yifei
AU - Cui Siqi
AU - Zhang Chao
AU - Feng Shiwei
AU - Xu Chuang
AU - Fan Huifang
JN - Thermal Science
PY - 2023
VL - 27
IS - 3
SP - 1845
EP - 1853
PT - Article
AB - In order to improve the thermal performance of a high temperature heat pump  system, to realize the efficient heat recovery of industrial waste heat, and  to make the combined utilization of low and medium temperature heat sources,  a high temperature heat pump system with a double heat source cascade is  proposed, which can absorb heat from industrial waste heat and the system is  capable of heating water up to the required high temperature. The  performance of the system is tested and analyzed. It is found that the  inlet temperature of the medium temperature heat source has a significant  impact on the performance of the heat pump system under working mode of the  medium and low temperature heat sources. When the inlet temperature of the  intermediate temperature heat source rises from 42°C to 53°C, the heating  capacity of the cascade heat pump increases by 18.6%, and its performance  coefficient increases by 8.9%. This paper provides a reference for the high  efficiency of the cascade high temperature heat pump technology.