An investigation of the vertical diffuse efficacy of solar irradiance for Thailand's climate
Conference proceedings article
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Author list: Umar S., Chaiwiwatworakul P.
Publisher: IOP Publishing
Publication year: 2018
Volume number: 164
Issue number: 1
ISSN: 1755-1307
eISSN: 1755-1315
Languages: English-Great Britain (EN-GB)
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Abstract
This paper presents a study result of the luminous efficacy of diffuse solar irradiance on vertical plans using records from a daylight measurement station located in Bangkok, Thailand. Hourly mean values of the vertical diffuse efficacy are first introduced. Variations of the efficacy are also presented for different sky conditions. Our results indicate that the tropical diffuse efficacy was higher than those in high latitude regions. In this study, the authors proposed a method for the efficacy prediction. The proposed method was evaluated its performance against some selected existing models. The results show that the authors' method predicted well the tropical efficacy value and outperformed other evaluated models with their original coefficients. ฉ Published under licence by IOP Publishing Ltd.
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