摘要
Considered as the widespread renewable energy,solar energy is used to produce the electricity and heat for carbon peaking and carbon neutralization.However,the photo-electric conversion efficiency will decrease with the increase of cells temperature.To solve this problem,a water-type hybrid photovoltaic/thermal(PV/T)solar system has been designed and tested in Hong Kong.The outdoor experiment proceeded all days in 6 months with three different operating modes.The data of selected 33 days were used to analyze the performance of the system.The results showed that the thermal efficiencies were 33.6%,52%,and 48.3%at zero reduced temperature,corresponding to three modes.Besides,the overall efficiencies were 43.2%,60.9%,and 55.2%accordingly,which are higher than those of the conventional flat-plate solar collector.The average water temperature in the storage tank could reach 39.9°C,and the system could produce 0.07 kWh electric power after one-day operation,when the collector with 96 kg/m2 M/Ac installed vertically combining with external wall for each family.It is realizable to utilize the developed building integrated water-type photovoltaic/thermal(BIPVT)solar system for residential-intensive high-rise buildings in Hong Kong,satisfying the needs of hot water,and eventually reducing energy consumption of the buildings.
基金
the Science&Technology Development Fund of Tianjin Education Commission for Higher Education(Project No.2020ZD03)
Tianjin Science and Technology Plan Project Technical Innovation and Guide Special Project Science and Technology Commissioner Project(Grant No.21YDTPJC01000).
