| Solar heat pump system absorbs heat from solar energy and provides heat to building heating, hot water supply, industrial heat and other aspects. The system takes advantage of both high thermal collect efficiency in low ambient temperature and high heat efficiency in high evaporator temperature. It plays a significant role in environment protection and low carbon resource exploitation.Solar heat pump water heater system consists of two major systems:refrigerant system and water system. The water system was disposed to meet the need of consumption request, and the refrigerant system was designed as the spring working conditions. The strong heat absorbs ability of evaporator leads evaporator temperature deviation from design status seriously, and brought a series of harm to the machine.Factors and their weight to solar heat pump water heater system was analyzed, and the Formula was proposed, it reveals evaporator temperature has the biggest influence to COP.In the paper. Thermal Coordination Solar Heat Pump Water Heater System was proposed based on the relationship and independence between refrigerant system and water system, it can not only protect the air compressor but also increased the COP.Refer to series of national standards, an experimental platform was built and many experiments in different evaporator conditions or different system structure has been made, and the dates shows discharge temperature decrease by s well as10℃as well as COP increased by0.565.Economical efficiency was analyzed in the paper, the operation time decreased by27%or32.4%when taken the Thermal Coordination Solar Heat Pump Water Heater System.The theory of thermal coordination and additional heating parameter has much significance to high temperature heat pump and variable conditions. |
PDF Full Text Request