TY - JOUR
TI - Experimental investigation on optimal temperature lift of an inverter heat pump system
AU - Wang Fang
AU - Fan Xiao-Wei
AU - Zheng Hui-Fan
AU - Xu Di
AU - Zhang Xian-Ping
JN - Thermal Science
PY - 2013
VL - 17
IS - 5
SP - 1459
EP - 1465
PT - Article
AB - The temperature lift directly influences the efficiency of the heat pump,  meanwhile, the coefficient of performance and the heat sink temperature lift  of heat pump systems are mutually exclusive parameters, i.e., the higher  temperature lift leads to the lower coefficient of performance while the  lower temperature lift leads to the higher coefficient of performance. To  deal with the dilemma, a primary theoretical analysis is performed, and a  case study of an inverter water source heat pump is carried out, which is  operated under the conditions of compressor frequency of 15-85 Hz and heat  sink flow rate of 120/160/180/200 kg/h, respectively. The relationships among  the temperature lift, coefficient of performance and compressor power  consumption are analyzed, The results show that the optimal temperature lift  mainly depends on the inlet temperature of heat sink, and has little to do  with the compressor frequency and water flow rate, which are of significance  for the optimal operation of heat pump systems.