Estimativas das radiações direta e difusa em superfícies inclinadas com base na razáo de insolação

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dc.contributor.authorDe Souza, Adilson P.
dc.contributor.authorEscobedo, João Francisco [UNESP]
dc.contributor.institutionInstituto de Ciências Agrárias e Ambientais
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:30:50Z
dc.date.available2014-05-27T11:30:50Z
dc.date.issued2013-10-07
dc.description.abstractStatistical equations were obtained and evaluated with annual, seasonal and monthly data groupings for estimates of direct and diffuse components of solar radiation based on the sunshine duration (ratio of sunshine and photoperiod) incident on horizontal and inclined surfaces to 12.85, 22.85 and 32.85° with facing to North, in Botucatu, SP. The ratios between the two components and radiation at the top of the atmosphere were used, in a database whose inclinations were measured in three different periods (22.85°: 04/1998 to 07/2001; 12.85°: 08/2011 to 02/2003; and 32.85°: 03/2003 to 12/2007) and concomitant with horizontal measures and sunshine duration. The correlations showed a linear and second degree polynomial behavior for the direct and diffuse radiation, with higher coefficients of determination in periods of low variation in the coverage of the sky (cloudiness). The highest values of the direct and diffuse radiation were found in winter and summer, respectively for all surfaces evaluated. The increase in the inclination angle decreased the performance of equations in all groups of data with increase in scattering and decrease in index of the adjustment, however, the monthly equations allowed better performance for the two components.en
dc.description.affiliationUniversidade Federal de Mato Grosso Instituto de Ciências Agrárias e Ambientais Campus de Sinop, Distrito Industrial, CEP 78550-000, Sinop-MT
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências Agronômicas de Botucatu Departamento de Ciências Ambientais, Fazenda Experimental Lageado, s/n, CEP 18610-970, Botucatu-SP
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências Agronômicas de Botucatu Departamento de Ciências Ambientais, Fazenda Experimental Lageado, s/n, CEP 18610-970, Botucatu-SP
dc.format.extent492-502
dc.identifierhttp://dx.doi.org/10.5039/agraria.v8i3a1896
dc.identifier.citationRevista Brasileirade Ciencias Agrarias, v. 8, n. 3, p. 492-502, 2013.
dc.identifier.doi10.5039/agraria.v8i3a1896
dc.identifier.file2-s2.0-84884859619.pdf
dc.identifier.issn1981-1160
dc.identifier.issn1981-0997
dc.identifier.scopus2-s2.0-84884859619
dc.identifier.urihttp://hdl.handle.net/11449/76801
dc.language.isopor
dc.relation.ispartofRevista Brasileirade Ciencias Agrarias
dc.relation.ispartofsjr0,288
dc.relation.ispartofsjr0,288
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAngströn-Prescott model
dc.subjectAtmospheric transmissivity
dc.subjectSolar energy
dc.subjectStatistical indicators
dc.titleEstimativas das radiações direta e difusa em superfícies inclinadas com base na razáo de insolaçãopt
dc.title.alternativeEstimates of direct and diffuse radiation incident on inclined surfaces based on ratio of sunshine durationen
dc.typeArtigo
dcterms.licensehttp://www.agraria.pro.br/sistema/index.php?journal=agraria&page=about&op=editorialPolicies#openAccessPolicy
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agronômicas, Botucatupt

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