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Open AccessArticle

Shading by Overhang PV Collectors

Tel Aviv University School of Electrical Engineering, Tel Aviv 69978, Israel
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Appl. Sci. 2019, 9(20), 4280; https://doi.org/10.3390/app9204280
Received: 1 August 2019 / Revised: 29 September 2019 / Accepted: 30 September 2019 / Published: 12 October 2019
(This article belongs to the Special Issue Next Generation Solar Cells, Modules and Applications 2020)
Photovoltaic modules integrated into buildings may provide shading to windows, doors and walls to protect against sun rays and at the same time generate ancillary electrical energy. The study develops the methodology for calculating the shadow variation cast by overhangs on doors, windows, carports, and calculates the annual incident energy (beam, diffuse and global energy) on overhangs made up of conventional and bifacial PV modules. The methodology of the present study is different from published articles including software programs. The study starts with shadows on walls cast by a horizontal pole and follows by shadows on walls cast by horizontal plates, inclined pole, inclined plate, and shaded area. The study deals also with overhangs placed one above the other. The calculation of the diffuse radiation involves the calculation of view factors to sky, to ground and between overhangs. In addition, the present study suggests using bifacial PV modules for overhangs and calculates the contribution of the reflective energy (5% and more) from walls and ground to the rear side of the bifacial PV module. View Full-Text
Keywords: BIPV; window shadowing; overhang PV collectors; bifacial PV collectors BIPV; window shadowing; overhang PV collectors; bifacial PV collectors
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MDPI and ACS Style

Appelbaum, J.; Aronescu, A.; Maor, T. Shading by Overhang PV Collectors. Appl. Sci. 2019, 9, 4280.

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