Abstract
This paper aims to evaluate the optimum tilt angle of PV modules on louvered PV façade in Changsha - a city located at middle and low latitude, and representative cloudy climate conditions in Central China. Within these climate conditions, this research discusses the influences of external and internal factors on photoelectric conversion efficiency and shading effect of louvered PV façade. The research result shows that the external and internal design factors of louvered PV façade take opposite effects on the louver tilt angle. Under the influence of external factors, the preferred value interval will be βopt≈Φ and βopt<Φ, whereas under the influence of the internal design factors, the preferred value interval is Φ and above. Taking all factors into consideration, the optimal tilt angle of the PV louver in Changsha is selected as 30°.
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