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dc.contributor.authorSuárez García, Andrés 
dc.contributor.authorGranados López, Diego 
dc.contributor.authorGonzález Peña, David 
dc.contributor.authorDiez Mediavilla, Montserrat 
dc.contributor.authorAlonso Tristán, Cristina 
dc.date.accessioned2018-05-16T11:15:48Z
dc.date.issued2018-07
dc.identifier.issn0038-092X
dc.identifier.urihttp://hdl.handle.net/10259/4792
dc.description.abstractOutdoor daylight conditions in Burgos, Spain, are studied throughout a full year. The CIE standard sky type is selected in accordance with the lowest RMSD (Root Mean Square Deviation) following the comparison of both the theoretical and the experimental luminance distributions in the sky hemisphere. The original criterion to determine the type of sky, the SSLD (the Standard Sky Luminance Distribution), is difficult to apply in certain places and at times when the solar elevation is higher than 35°. In consequence, two alternative procedures are used and compared in this study: the Tregenza method and the Normalization Rate (NR) introduced by Littlefair. The selection was taken from luminance distribution data of 145 patches of the sky hemisphere recorded between June 2016 and May 2017. The most frequent sky type observed in Burgos was V.5. (cloudless polluted with a broad solar corona), with a frequency of occurrence close to 20%. Notwithstanding that observation, the group of clear skies exhibited a higher frequency (in almost 50% of the cases under study, using both methods). The skies above Burgos were of an overcast sky type in less than 25% of cases, a situation with a higher likelihood in winter and in autumn, while in spring and summer the skies tended to be clear and cloud free. Both of the methodologies showed similar results in percentage terms and in confusion matrixes with almost insignificant differences when compared on a monthly, a seasonal, and an annual basis. Nevertheless, some mismatches were located in the highest solar elevation values.en
dc.description.sponsorshipRegional Government of Castilla y León (Ref. BU034U16), under European Regional Development Fund, and the Spanish Ministry of Economy, Industry and Competitiveness, under the I+D+i State Programme Challenges for the Society (Ref. ENE-2014-54601-R)en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieren
dc.relation.ispartofSolar Energy. 2018, V. 169, p 24-33en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCIE standard skiesen
dc.subjectLuminanceen
dc.subjectDaylighten
dc.subjectSky luminance distributionen
dc.subject.otherElectric engineeringen
dc.subject.otherIngeniería eléctricaes
dc.titleSeasonal caracterization of CIE standard sky types above Burgos, northwestern Spainen
dc.typeinfo:eu-repo/semantics/article
dc.date.embargo2020-07
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherversionhttps://doi.org/10.1016/j.solener.2018.04.028
dc.identifier.doi10.1016/j.solener.2018.04.028
dc.relation.projectIDinfo:eu-repo/grantAgreement/JCyL/BU034U16
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersionen


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