Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal

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dc.contributor.authorScolar, José [UNESP]
dc.contributor.authorMartins, Dinival [UNESP]
dc.contributor.authorEscobedo, João Francisco [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T20:15:38Z
dc.date.available2022-04-28T20:15:38Z
dc.date.issued2003-08-01
dc.description.abstractA modeling study of the total irradiation reaching a tilted surface facing towards the Equator at a place with the same latitude (-22.85°), using the Daily partitioning energy, is presented. In this study three total irradiation incident on tilled surface estimate models (LIU; JORDAN, 1963; HAY, 1979; PEREZ et al., 1987) were modified in two different manners, to improve irradiation estimative model for tilted surface knowing only the global irradiation. The first modification consisted to apply empirical functions to determine the diffuse irradiation by the global radiation measurements. These empirical functions were tuned using a linear regression technique, the fraction of the diffuse irradiation (Kd) from the global irradiation, was correlated with the clearness index (Kd). In this case the highest correlation found was a fourth order polynomial function. In the second modification the fraction of the direct irradiation KBH from the global irradiation was correlated assuming a linear correlation at given intervals of K t. Model results showed that the empirical relationship K BH=f(Kt) presented better results and the Hay model presented a better performance compared with the two others models for the Botucatu region.en
dc.description.affiliationPesquisador Aposentado do Instiuto de Pesquisas Meteorológicas da UNESP de BAURU, Rua Martim Afonso 11-28 Vila Souto, CEP 17051-040 Bauru, SP
dc.description.affiliationFaculdade de Ciências Agronômicas Departamento de Ciências Ambientais da UNESP- Botucatu - SP Fazenda Experimental Lageado, Cx Postal 237, CEP 18603-970 Botucatu, SP
dc.description.affiliationUnespPesquisador Aposentado do Instiuto de Pesquisas Meteorológicas da UNESP de BAURU, Rua Martim Afonso 11-28 Vila Souto, CEP 17051-040 Bauru, SP
dc.description.affiliationUnespFaculdade de Ciências Agronômicas Departamento de Ciências Ambientais da UNESP- Botucatu - SP Fazenda Experimental Lageado, Cx Postal 237, CEP 18603-970 Botucatu, SP
dc.format.extent249-258
dc.identifier.citationRevista Brasileira de Geofisica, v. 21, n. 3, p. 249-258, 2003.
dc.identifier.issn0102-261X
dc.identifier.scopus2-s2.0-33846856522
dc.identifier.urihttp://hdl.handle.net/11449/224862
dc.language.isopor
dc.relation.ispartofRevista Brasileira de Geofisica
dc.sourceScopus
dc.subjectModels
dc.subjectSolar irradiation
dc.subjectTilted surface
dc.titleEstimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontalpt
dc.title.alternativeEstimate of the total irradiation on a tilted surface towards the horizontal global irradiationen
dc.typeArtigo
unesp.departmentCiência Florestal - FCApt

Arquivos

Coleções

Artigos - Instituto de Pesquisas Meteorológicas (IPMet) - Bauru
Botucatu - FCA - Faculdade de Ciências Agronômicas