Numerical method for angle-of-incidence correction factors for diffuse radiation incident photovoltaic modules

•Numerical method for angle-of-incidence correction factor for diffuse irradiances.•Results for sky, horizon, and ground-reflected radiation versus PV module tilt.•Application of method will improve predictions of PV system performance. A numerical method is provided for solving the integral equatio...

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Bibliographic Details
Published in:Solar energy 2017-05, Vol.147 (C), p.344-348
Main Author: Marion, Bill
Format: Article
Language:English
Subjects:
Angle-of-incidence losses
Diffuse radiation
Diffuse solar radiation
Incidence
Integral equations
Irradiance
Modules
Numerical analysis
Numerical solution
Photovoltaic cells
Photovoltaics
Radiation
Solar cells
SOLAR ENERGY
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Summary:•Numerical method for angle-of-incidence correction factor for diffuse irradiances.•Results for sky, horizon, and ground-reflected radiation versus PV module tilt.•Application of method will improve predictions of PV system performance. 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° to 90°. 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.
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2017.03.027