the prototype of dual-source heat pump water heater using air and water is assembled, and experimental research of performance is tested using air as heat source, respectively the ambient temperature is 7℃ and 20℃; water temperature of the prototype using water as heat source is respectively 15℃, 30℃. the results showed that the dual-source heat pump utilizes water source in the summer, utilizes air source during intermediate seasons, running stable and energy-saving effect is obvious, Coefficient of performance could reach up to 5.58 with the minimal value approximately 3.21.
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