LI Shanshan, LI Shuhong, ZHANG Xiaosong. Simulation of CO2 heat pump water heater with hybrid heat sources[J]. CIESC Journal, 2014, (z2): 256-264. DOI: 10.3969/j.issn.0438-1157.2014.z2.038.
LI Shanshan, LI Shuhong, ZHANG Xiaosong. Simulation of CO2 heat pump water heater with hybrid heat sources[J]. CIESC Journal, 2014, (z2): 256-264. DOI: 10.3969/j.issn.0438-1157.2014.z2.038.DOI:
To improve the performance of the heat pump water heater
CO2 is used to develop a heat pump water heater using the hybrid heat sources for its advantages of environment-friendly and the unique thermodynamic properties. The steady state models
including heating collector/evaporator
compressor
gas cooler
regenerator and throttle
are established according to the lumped parameter method. The operating characteristics of the CO2 heat pump water heater using the hybrid heat sources are analyzed
and the changes of COP were proposed on varied structural parameters
pressure
temperature of CO2
environmental temperature and solar radiation. The results show that a higher COP is achieved for the CO2 heat pump water heater at the appropriate structure parameters
enviromental parameters and operation parameters. The value of COP is 6.0 while the ambient temperature and the solar radiation are 35℃ and 900 W·m-2 respectively.