Comparison of CO2 heat pump water heater performance with baseline cycle and two high cop cycles[J]. International Journal of Refrigeration 33 635-644, 2010Fernandez, N.; Hwang, Y.; Radermacher, R. Comparison of CO2 heat pump water heater performance with baseline cycle and two high COP ...
heat pump water heater breadboard facility was built and a performance evaluation was conducted to investigate the effect of ambient temperature and hot water temperature on the overall coefficient of performance (COP) during full tank heating tests in three scenarios typical of residential water ...
PROBLEM TO BE SOLVED: To provide a convenient instantaneous heat pump water heater shortening a rising time and improving low temperature flooded characteristics.;SOLUTION: This heat pump water heater comprises a heat pump refrigerant circuit with a compressor, a water-refrigerant heat exchanger, a re...
Another comparative study for a propane air–water heater and transcritical CO2 water heater has been investigated by Tammaro et. al [50]. The operating efficiency of the two units has been studied based on various ambient conditions. The thermodynamics cycles for the transcritical CO2 heat pump ...
Provided is a heat-pump water heater and air conditioner having an expanded operable range when operating in heater mode. The heat-pump water heater and air conditioner has a water system that receives heat from a refrigerant system in the heat-pump, thereby producing hot water, and the refrig...
Performance Comparison of Various Types of CO2 Compressors for Heat Pump Water Heater Application Numerical simulations for scroll, two-stage twin rotary, and two-cylinder reciprocating compressors have been carried out to understand the effectiveness o... HJ Kim,WY Kim,JM Ahn - International Journal...
Thermally efficiency Heating system description Solar thermal and ASHP supplying a thermal store, dissipated through AHUs Hot water generation description Solar thermal, ASHP and immersion heater Main Ventilation Type Natural, supplemented with night-time purge ventilation Other information No cooling system...
, Water , Steam . Heat pump systems are able to provide temperature lift on a wide range. The heat source, however, is an important factor, since it has a significant impact on both system volume and efficiency. Increasing evaporation temperature will decrease the heat-exchanger volume, and ...
Commercial hot water heat pump is built on a new power-saving technology, which wins universal attention. It s also a new generation of power-saving environment protected device succeeding electric water heater, gas water heater and solar energy heater. Heat pump water he...
storage tank.;SOLUTION: The heat pump water heater is provided with a heat pump cycle 100 wherein a compressor 101, a heat exchanger 102 for hot water supply, an expansion valve 104, and an evaporator 105 are connected by a piping, and the hot water storage tank 120 storing a heated ...