MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.renene.2016.07.026 http://hdl.handle.net/11449/173308 |
Resumo: | The present paper deals with atmospheric corrections factors proposed as a function of the atmospheric transmissivity in order to correct the diffuse solar irradiance measured with the Melo-Escobedo-Oliveira Shadowring Measuring Method (MEO shadowring Method). Global irradiance was measured by an Eppley-PSP pyranometer; direct normal irradiance by an Eppley-NIP pyrheliometer fitted to a ST-3 sun tracking device and diffuse irradiance by an Eppley-PSP pyranometer fitted to a MEO shadowring. The Solar Radiometric Laboratory at Sao Paulo State University provided the measurements during the years 1996–2005. Two correction models for diffuse solar irradiance were proposed: All Sky Correction Model (ASC Model) and Sky Cover Correction Model (SCC Model). The MBE and RMSE statistical indicators performed the validations. The correction models showed results in the same order of magnitude: ASC Model showed 0.81% deviation, while SCC Model showed 0.66% deviation. Therefore, the correction models proposed as a function of the sky covering (atmospheric transmissivity) were efficient to correct the isotropic diffuse irradiance, approaching the measured and reference diffuse irradiance less than 1%. Corrections show dependence on sky coverage and seasonality. The results presented that the sky cover corrections improve the MEO shadowring method, allowing the generation of a reliable global, direct and diffuse radiation database without high financial investments. |
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MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky coverAnisotropyDiffuse radiationMeasuring methodsShadowringSky coverThe present paper deals with atmospheric corrections factors proposed as a function of the atmospheric transmissivity in order to correct the diffuse solar irradiance measured with the Melo-Escobedo-Oliveira Shadowring Measuring Method (MEO shadowring Method). Global irradiance was measured by an Eppley-PSP pyranometer; direct normal irradiance by an Eppley-NIP pyrheliometer fitted to a ST-3 sun tracking device and diffuse irradiance by an Eppley-PSP pyranometer fitted to a MEO shadowring. The Solar Radiometric Laboratory at Sao Paulo State University provided the measurements during the years 1996–2005. Two correction models for diffuse solar irradiance were proposed: All Sky Correction Model (ASC Model) and Sky Cover Correction Model (SCC Model). The MBE and RMSE statistical indicators performed the validations. The correction models showed results in the same order of magnitude: ASC Model showed 0.81% deviation, while SCC Model showed 0.66% deviation. Therefore, the correction models proposed as a function of the sky covering (atmospheric transmissivity) were efficient to correct the isotropic diffuse irradiance, approaching the measured and reference diffuse irradiance less than 1%. Corrections show dependence on sky coverage and seasonality. The results presented that the sky cover corrections improve the MEO shadowring method, allowing the generation of a reliable global, direct and diffuse radiation database without high financial investments.College of Agricultural Sciences / FCA / UNESP Department of Bioprocess and BiotechnologyCollege of Agricultural Sciences / FCA / UNESP Department of Rural EngineeringInstitute of Astronomy Geophysics and Atmospheric Sciences USPCollege of Agricultural Sciences / FCA / UNESP Department of Bioprocess and BiotechnologyCollege of Agricultural Sciences / FCA / UNESP Department of Rural EngineeringUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Dal Pai, Alexandre [UNESP]Escobedo, João Francisco [UNESP]Dal Pai, Enzo [UNESP]de Oliveira, Amauri PereiraSoares, Jacyra RamosCodato, Georgia2018-12-11T17:04:36Z2018-12-11T17:04:36Z2016-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article754-763http://dx.doi.org/10.1016/j.renene.2016.07.026Renewable Energy, v. 99, p. 754-763.1879-06820960-1481http://hdl.handle.net/11449/17330810.1016/j.renene.2016.07.0262-s2.0-84979765601Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRenewable Energy1,847info:eu-repo/semantics/openAccess2024-04-30T14:01:19Zoai:repositorio.unesp.br:11449/173308Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-30T14:01:19Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
title |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
spellingShingle |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover Dal Pai, Alexandre [UNESP] Anisotropy Diffuse radiation Measuring methods Shadowring Sky cover |
title_short |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
title_full |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
title_fullStr |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
title_full_unstemmed |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
title_sort |
MEO shadowring method for measuring diffuse solar irradiance: Corrections based on sky cover |
author |
Dal Pai, Alexandre [UNESP] |
author_facet |
Dal Pai, Alexandre [UNESP] Escobedo, João Francisco [UNESP] Dal Pai, Enzo [UNESP] de Oliveira, Amauri Pereira Soares, Jacyra Ramos Codato, Georgia |
author_role |
author |
author2 |
Escobedo, João Francisco [UNESP] Dal Pai, Enzo [UNESP] de Oliveira, Amauri Pereira Soares, Jacyra Ramos Codato, Georgia |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Dal Pai, Alexandre [UNESP] Escobedo, João Francisco [UNESP] Dal Pai, Enzo [UNESP] de Oliveira, Amauri Pereira Soares, Jacyra Ramos Codato, Georgia |
dc.subject.por.fl_str_mv |
Anisotropy Diffuse radiation Measuring methods Shadowring Sky cover |
topic |
Anisotropy Diffuse radiation Measuring methods Shadowring Sky cover |
description |
The present paper deals with atmospheric corrections factors proposed as a function of the atmospheric transmissivity in order to correct the diffuse solar irradiance measured with the Melo-Escobedo-Oliveira Shadowring Measuring Method (MEO shadowring Method). Global irradiance was measured by an Eppley-PSP pyranometer; direct normal irradiance by an Eppley-NIP pyrheliometer fitted to a ST-3 sun tracking device and diffuse irradiance by an Eppley-PSP pyranometer fitted to a MEO shadowring. The Solar Radiometric Laboratory at Sao Paulo State University provided the measurements during the years 1996–2005. Two correction models for diffuse solar irradiance were proposed: All Sky Correction Model (ASC Model) and Sky Cover Correction Model (SCC Model). The MBE and RMSE statistical indicators performed the validations. The correction models showed results in the same order of magnitude: ASC Model showed 0.81% deviation, while SCC Model showed 0.66% deviation. Therefore, the correction models proposed as a function of the sky covering (atmospheric transmissivity) were efficient to correct the isotropic diffuse irradiance, approaching the measured and reference diffuse irradiance less than 1%. Corrections show dependence on sky coverage and seasonality. The results presented that the sky cover corrections improve the MEO shadowring method, allowing the generation of a reliable global, direct and diffuse radiation database without high financial investments. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-01 2018-12-11T17:04:36Z 2018-12-11T17:04:36Z |
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 |
http://dx.doi.org/10.1016/j.renene.2016.07.026 Renewable Energy, v. 99, p. 754-763. 1879-0682 0960-1481 http://hdl.handle.net/11449/173308 10.1016/j.renene.2016.07.026 2-s2.0-84979765601 |
url |
http://dx.doi.org/10.1016/j.renene.2016.07.026 http://hdl.handle.net/11449/173308 |
identifier_str_mv |
Renewable Energy, v. 99, p. 754-763. 1879-0682 0960-1481 10.1016/j.renene.2016.07.026 2-s2.0-84979765601 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Renewable Energy 1,847 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
754-763 |
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_ |
1799965075197394944 |