 Equations for estimating global solar radiation in data sparse regionsTheo Chidiezie Chineke Renewable Energy, 2008, vol. 33, issue 4, 827-831 Abstract: The knowledge of the amount of solar radiation in an area/region is very essential in the field of Solar Energy Physics. In this work two equations are put forward for estimating global solar radiation from common climate variables in data sparse regions. The first is the Hargreaves equation, Rs=0.16RaTd0.5 where Ra is the extraterrestrial solar radiation and Td is the temperature difference (maximum minus minimum), while the second is the Angstrom equation, Rs=Ra(0.28+0.39n/N) where n and N are the measured sunshine hours and the maximum daylight duration respectively. The global solar radiation estimated by the two equations for three sites, Owerri (5°28′N, 7°2′E), Umudike (5°29′N, 7°33′E) and Ilorin (8°32′N, 4°46′E), located in different climate zones of in Nigeria, West Africa, are in agreement with those of earlier workers and that from Photovoltaic Geographic Information System (PVGIS) project. The implication of this in solar photovoltaic applications has been stressed. Keywords: Global solar radiation; PVGIS; Hargreaves; Angstrom; Photovoltaic; Nigeria (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:33:y:2008:i:4:p:827-831 DOI: 10.1016/j.renene.2007.01.018 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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