An investigation of the performance of 14 models for estimating hourly diffuse irradiation on inclined surfaces at tropical sites

Rungrat Wattan and Serm Janjai

Renewable Energy, 2016, vol. 93, issue C, 667-674

Abstract: The performance of 14 models for estimating hourly diffuse irradiation on inclined surfaces was investigated. In order to obtain solar radiation data for this investigation, equipment for measuring solar radiation on inclined surfaces facing to the north, south, east and the west at different tilted angles to the horizontal surface (30°, 60° and 90°) were constructed and installed at two tropical sites in Thailand, namely Nakhon Pathom (13.82 °N, 100.04 °E) and Ubon Ratchathani (15.25 °N, 104.87 °E). Radiation data encompassing different periods of 1–4 years were used in this work. Diffuse irradiance measurements at different tilted angles were compared with various model algorithms. Results show that the Muneer and Gueymard models have comparable performance in terms of root mean square difference (RMSD) and these models give the lowest RMSD, as compared to that of the other models.

Keywords: Diffuse solar radiation models; Inclined surface; Tropics (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:93:y:2016:i:c:p:667-674

DOI: 10.1016/j.renene.2016.02.076

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