Modeling diffuse irradiance under arbitrary and homogeneous skies: Comparison and validation

Miroslav Kocifaj and Ladislav Kómar

Applied Energy, 2016, vol. 166, issue C, 117-127

Abstract: The optimum utilization of solar energy requires effective harvesting of both the direct and diffuse components of ground-reaching radiation. Although solar beams are typically key contributors to the total irradiance under cloudless conditions, the diffuse component becomes important especially in regions where clear skies are not dominant. Even if the cloud cover and cloud microphysics are known, it is not an easy task to estimate the diffuse irradiance at arbitrarily oriented sloped surfaces. This situation arises from the extreme difficulty in solving the radiative transfer equation in such a heterogeneous environment.

Keywords: Diffuse irradiance; Irradiance forecasting; UMRP model; Numerical model; Cloud fraction (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (12)

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DOI: 10.1016/j.apenergy.2016.01.024

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