Study on Economic and Factors Influencing of Direct Expansion Solar PVT Heat Pump Hot Water System
In this paper,the performance,system investment,and operating cost of direct expansion solar PVT heat pump,air source heat pump and electric water boiler system were compared.With the levelized cost of heat(LCoH)as the index,calculation shows that direct expansion solar PVT heat pump has the lowest LCoH.The effects of system COP,solar irradiation,PV module power,operation and maintenance costs on LCoH of direct expansion solar PVT heat pump hot water pump were then analyzed.Results show that LCoH decreased by 19.5％when the system COP increased from 4.41 to 6.61.The higher the solar irradiation,the fewer PVT modules required by the system,and the lower the initial investment.The LCoH of A-level resource area is 9.6％lower than the C-level resource area.The LCoH decreases by 8.1％when the PVT module power of the system configuration is increased from 300 W to 500 W.The LCoH of the direct expansion solar PVT heat pump hot water pump system with operation and maintenance personnel cost 5 000 yuan/year increases by 33.6％compared with no operation and maintenance personnel costs.The operation and maintenance personnel costs have a huge impact on the system LCoH.Therefore,during the actual operation of the PVT system,maintenance personnel should be reasonably allocated to reduce maintenance costs as much as possible.
solar energydirect expansion typePVT heat pumpeconomic analysisLCoH
万方数据
维普
