Estimation of Monthly Solar Radiation in Bangkok by Computational Models
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Abstract
Global solar radiation represents the combined output of direct and diffuse solar energy. Gathering data on solar radiation serves various purposes, such as facilitating solar applications, aiding architectural design, and supporting renewable technology. Estimating solar energy often involves empirical models, which incorporate meteorological and geographical parameters into the calculation process.In this work, three models based on sunshine duration hour were employed to develop a provisional solar radiation data for Bangkok, Thailand. Statistical analysis revealed that the Elagib & Mansell model exhibited the most accurate fit for this selected location, with RMSE = 3.770 MJ/m2.day, MBE=7.291 MJ/m2.day, MABE = 7.719 MJ/m2.day, and MPE=50.286. It can be concluded that Bangkok experiences solar radiation conditions akin to those in Sudan, as assumed by Elagib and Mansell, considering seasonal variations and period, geographical coordinates, and atmospheric pollution levels. Similarly, the Peninsular Malaysia case study and the achievable forecast from modelings showed a similar tendency in correlation.
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