Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/224862 |
Resumo: | A 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. |
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Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontalEstimate of the total irradiation on a tilted surface towards the horizontal global irradiationModelsSolar irradiationTilted surfaceA 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.Pesquisador Aposentado do Instiuto de Pesquisas Meteorológicas da UNESP de BAURU, Rua Martim Afonso 11-28 Vila Souto, CEP 17051-040 Bauru, SPFaculdade de Ciências Agronômicas Departamento de Ciências Ambientais da UNESP- Botucatu - SP Fazenda Experimental Lageado, Cx Postal 237, CEP 18603-970 Botucatu, SPPesquisador Aposentado do Instiuto de Pesquisas Meteorológicas da UNESP de BAURU, Rua Martim Afonso 11-28 Vila Souto, CEP 17051-040 Bauru, SPFaculdade de Ciências Agronômicas Departamento de Ciências Ambientais da UNESP- Botucatu - SP Fazenda Experimental Lageado, Cx Postal 237, CEP 18603-970 Botucatu, SPUniversidade Estadual Paulista (UNESP)Scolar, José [UNESP]Martins, Dinival [UNESP]Escobedo, João Francisco [UNESP]2022-04-28T20:15:38Z2022-04-28T20:15:38Z2003-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article249-258Revista Brasileira de Geofisica, v. 21, n. 3, p. 249-258, 2003.0102-261Xhttp://hdl.handle.net/11449/2248622-s2.0-33846856522Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileira de Geofisicainfo:eu-repo/semantics/openAccess2024-04-30T13:11:27Zoai:repositorio.unesp.br:11449/224862Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:00:47.309328Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal Estimate of the total irradiation on a tilted surface towards the horizontal global irradiation |
title |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal |
spellingShingle |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal Scolar, José [UNESP] Models Solar irradiation Tilted surface |
title_short |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal |
title_full |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal |
title_fullStr |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal |
title_full_unstemmed |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal |
title_sort |
Estimativa da irradiação total sobre uma superfície inclinada a partir da irradiação global na horizontal |
author |
Scolar, José [UNESP] |
author_facet |
Scolar, José [UNESP] Martins, Dinival [UNESP] Escobedo, João Francisco [UNESP] |
author_role |
author |
author2 |
Martins, Dinival [UNESP] Escobedo, João Francisco [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Scolar, José [UNESP] Martins, Dinival [UNESP] Escobedo, João Francisco [UNESP] |
dc.subject.por.fl_str_mv |
Models Solar irradiation Tilted surface |
topic |
Models Solar irradiation Tilted surface |
description |
A 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. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-08-01 2022-04-28T20:15:38Z 2022-04-28T20:15:38Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Revista Brasileira de Geofisica, v. 21, n. 3, p. 249-258, 2003. 0102-261X http://hdl.handle.net/11449/224862 2-s2.0-33846856522 |
identifier_str_mv |
Revista Brasileira de Geofisica, v. 21, n. 3, p. 249-258, 2003. 0102-261X 2-s2.0-33846856522 |
url |
http://hdl.handle.net/11449/224862 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Geofisica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
249-258 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129572347052032 |