Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors

Among the various methods of measuring diffuse solar irradiance, shadowing devices are ones of the most commonly used in solar research all over the world. These instruments work with a basic pyranometer, properly calibrated for the measurement of solar irradiance, with a shadowing element, which ca...

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Autores: Simón Martín, Miguel de, Diez Mediavilla, Montserrat, Alonso Tristán, Cristina
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Universidad de Burgos (UBU)
Repositorio:Repositorio Institucional de la Universidad de Burgos (RIUBU)
OAI Identifier:oai:riubu.ubu.es:10259/4756
Acceso en línea:http://hdl.handle.net/10259/4756
Access Level:acceso abierto
Palabra clave:Solar diffuse irradiance
Shadow-band
Instrumentation
Correction factor
Electrotecnia
Electrical engineering
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spelling Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factorsSimón Martín, Miguel deDiez Mediavilla, MontserratAlonso Tristán, CristinaSolar diffuse irradianceShadow-bandInstrumentationCorrection factorElectrotecniaElectrical engineeringAmong the various methods of measuring diffuse solar irradiance, shadowing devices are ones of the most commonly used in solar research all over the world. These instruments work with a basic pyranometer, properly calibrated for the measurement of solar irradiance, with a shadowing element, which can be a disk or a band (Drummond’s shadow-band), that prevents the direct incidence of solar beam irradiance on the sensor. This method is capable of precise measurements, but sensor outputs have to be corrected, so as to quantify the amount of diffuse irradiance that the band blocks from reaching the sensor. Several authors have advanced different expressions for this correction factor, most of which only apply to horizontal and equator-oriented tilting pyranometers. In this work, we present a general approach to calculate the geometrical correction factor for a tilted sensor, oriented towards all possible azimuth and zenith angles, which permits the measurement of solar diffuse irradiance on any tilted and oriented surfaces. Furthermore, five total correction models are adapted for measurement in any given direction and evaluated on vertical walls pointing the four cardinal directions. Our results show that geometrical correction improves the Mean Bias Difference (MBD), the Root Mean Squared Difference (RMSD) and the l0:99 statistics by 60%, 62% and 56%, respectively, in contrast with the raw data. The LeBaron et al. model gives the most accurate figure for total correction according to MBD, RMSD and l0:99 statistics, with promising average performances of 97%, 91%, and 96%, respectivelySpanish Government (grant ENE2011-27511).Elsevier201820182016info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10259/4756reponame:Repositorio Institucional de la Universidad de Burgos (RIUBU)instname:Universidad de Burgos (UBU)InglésSolar Energy. 2016, V. 139, p. 85-99https://doi.org/10.1016/j.solener.2016.09.026Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riubu.ubu.es:10259/47562026-05-28T07:56:11Z
dc.title.none.fl_str_mv Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
title Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
spellingShingle Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
Simón Martín, Miguel de
Solar diffuse irradiance
Shadow-band
Instrumentation
Correction factor
Electrotecnia
Electrical engineering
title_short Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
title_full Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
title_fullStr Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
title_full_unstemmed Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
title_sort Shadow-band radiometer measurement of diffuse solar irradiance: Calculation of geometrical and total correction factors
dc.creator.none.fl_str_mv Simón Martín, Miguel de
Diez Mediavilla, Montserrat
Alonso Tristán, Cristina
author Simón Martín, Miguel de
author_facet Simón Martín, Miguel de
Diez Mediavilla, Montserrat
Alonso Tristán, Cristina
author_role author
author2 Diez Mediavilla, Montserrat
Alonso Tristán, Cristina
author2_role author
author
dc.subject.none.fl_str_mv Solar diffuse irradiance
Shadow-band
Instrumentation
Correction factor
Electrotecnia
Electrical engineering
topic Solar diffuse irradiance
Shadow-band
Instrumentation
Correction factor
Electrotecnia
Electrical engineering
description Among the various methods of measuring diffuse solar irradiance, shadowing devices are ones of the most commonly used in solar research all over the world. These instruments work with a basic pyranometer, properly calibrated for the measurement of solar irradiance, with a shadowing element, which can be a disk or a band (Drummond’s shadow-band), that prevents the direct incidence of solar beam irradiance on the sensor. This method is capable of precise measurements, but sensor outputs have to be corrected, so as to quantify the amount of diffuse irradiance that the band blocks from reaching the sensor. Several authors have advanced different expressions for this correction factor, most of which only apply to horizontal and equator-oriented tilting pyranometers. In this work, we present a general approach to calculate the geometrical correction factor for a tilted sensor, oriented towards all possible azimuth and zenith angles, which permits the measurement of solar diffuse irradiance on any tilted and oriented surfaces. Furthermore, five total correction models are adapted for measurement in any given direction and evaluated on vertical walls pointing the four cardinal directions. Our results show that geometrical correction improves the Mean Bias Difference (MBD), the Root Mean Squared Difference (RMSD) and the l0:99 statistics by 60%, 62% and 56%, respectively, in contrast with the raw data. The LeBaron et al. model gives the most accurate figure for total correction according to MBD, RMSD and l0:99 statistics, with promising average performances of 97%, 91%, and 96%, respectively
publishDate 2016
dc.date.none.fl_str_mv 2016
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10259/4756
url http://hdl.handle.net/10259/4756
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Solar Energy. 2016, V. 139, p. 85-99
https://doi.org/10.1016/j.solener.2016.09.026
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositorio Institucional de la Universidad de Burgos (RIUBU)
instname:Universidad de Burgos (UBU)
instname_str Universidad de Burgos (UBU)
reponame_str Repositorio Institucional de la Universidad de Burgos (RIUBU)
collection Repositorio Institucional de la Universidad de Burgos (RIUBU)
repository.name.fl_str_mv
repository.mail.fl_str_mv
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