Feasibility study of the winter heating about solar - water source heat pump system in hot summer and cold winter zone

摘要

Solar water-heat pump can greatly improve the comprehensive utilization efficiency of energy, it solves some problems that the heating performance is going down and often gets into protection mode of water source heat pump in winter long-running. Because of different solar radiation in different places, we should study more previous researches about this system before deciding to apply it. This paper took the simulation study in Changsha area chose the representation of hot summer and cold winter zone and adduced renewable energy construction project evaluation criteria method. The results showed that the solar energy can let the evaporator inlet water temperature to 22°C, so the unit COP increase 10.31% more than the evaporator inlet water temperature is 8°C and solar contribution rate(the percentage coefficient that describe the importance of solar energy contributing to water temperature rise in evaporator ) is 1.97%, in this time, the energy efficiency is optimal. The system having high energy efficiency can utilize discrete solar energy in heating, cooling and provide living hot water, so it has a good future in hot summer and cold winter zone.