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In this study, natural convection heat loss of PV panel with non-uniform heat flux was investigated experimentally. The flat plate having the similar physical characteristics is adopted to simulate PV panel. Electrical heating is employed to simulate the solar power. Main concerns are directed to the effects of tilt angles θ, k (gradient of the heat flux) and heat flux qw on the heat transfer from...
To make full use of the spectral radiation, a hybrid system comprising a photocatalytic subsystem and a photovoltaic subsystem is proposed for both water purification and electricity output. The photocatalytic subsystem is presented as a convex-lens type structure to concentrate sunlight for photoelectric conversion. The theoretical model of electrical efficiency calculation in the hybrid system is...
An experimental investigation with only bottom wall (opposite wall of opening) heated electrically at a constant heat flux was performed to explore the effects of wind directions in full range on the heat losses of a fully open cylindrical cavity. The results reveal that the bottom surface temperatures fluctuate in a small region, while the temperatures of side surface first decrease and then increase...
The dish/AMTEC solar thermal power system is a newly proposed solar energy utilization system that enables the direct thermal-electric conversion. The performance of the solar dish/AMTEC system in wind condition has been theoretically evaluated in addition to that of no-wind condition. Results show that, the variation of the overall efficiency of dish/AMTEC system with the operating temperature in...
The natural convection heat loss characteristics of a solar cavity receiver have been investigated by numerical simulation method. The results show that, the natural convection heat loss, the convection heat transfer coefficient and Nusselt number increase with the increment of opening ratio. However, due to the consideration of physical property variation of air in this study, the natural convection...
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