Journal
SOLAR ENERGY
Volume 147, Issue -, Pages 344-348Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2017.03.027
Keywords
Numerical solution; Angle-of-incidence losses; Diffuse solar radiation; Model
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Funding
- U.S. Department of Energy (DOE) [DE-AC36-08-GO28308]
- National Renewable Energy Laboratory (NREL)
- U.S. DOE Office of Energy Efficiency and Renewable Energy Solar Energy Technologies Program
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A numerical method is provided for solving the integral equation for the angle-of-incidence (AOI) correction factor for diffuse radiation incident photovoltaic (PV) modules. The types of diffuse radiation considered include sky, circumsolar, horizon, and ground-reflected. The method permits PV module AOI characteristics to be addressed when calculating AOI losses associated with diffuse radiation. Pseudo code is provided to aid users in the implementation, and results are shown for PV modules with tilt angles from 0 degrees to 90 degrees. Diffuse AOI losses are greatest for small PV module tilt angles. Including AOI losses associated with the diffuse irradiance will improve predictions of PV system performance. (C) 2017 Elsevier Ltd. All rights reserved.
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