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Determination of reflectance of interest from limited state-of-the-art solar reflector field soiling measurements

2025-10Journal article Open access
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datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg07:Energias Renováveis e Acessíveis
dc.contributor.authorWette, Johannes
dc.contributor.authorSutter, Florian
dc.contributor.authorCunha Diamantino, Teresa
dc.contributor.authorMontecchi, Marco
dc.contributor.authorBern, Gregor
dc.contributor.authorFernández-García, Aránzazu
dc.date.accessioned2025-11-14T11:23:11Z
dc.date.available2025-11-14T11:23:11Z
dc.date.issued2025-10
dc.description.abstractABSTRACT: In concentrated solar thermal technologies, plant operators usually monitor the soiling of their solar field with handheld reflectometers. These measurements can be used for yield calculations and to adapt cleaning strategies: if the reflectometer reading falls below an empirically established threshold, the solar field should be cleaned. There are several commercial reflectometers available for this purpose, but all of them measure at different combinations of wavelength, acceptance angle or incidence angle. It is the purpose of this study to bring the readings from all main commercial reflectometers to the same representative value, enabling their comparison with one another and the translation of these readings into a meaningful reflectance parameter. Thus, different handheld reflectometers are correlated with a laboratory reflectometer, capable of measuring in the whole solar spectral region, covering a wide range of incidence and acceptance angles. The most significant parameter is the near-specular solar-weighted reflectance, measured at the typical incidence and acceptance angles for a given plant, as it is the most precise parameter to describe the reflected energy from the solar field. The correlations for all included reflectometers, show highly linear correlations over a wide range of soiling levels with low deviations. Consequently, the correlations presented herein enable the plant operators at the studied site to compute the near-specular solar-weighted reflectance from their reflectometer readings. and, with that, increase the significance of the measurements without collecting any additional data. The work also establishes a detailed procedure to derive this type of correlations at any site of interest.eng
dc.description.sponsorshipSolarPACES, a Technology Collaboration Programme (TCP) of the International Energy Agency (IEA).
dc.identifier.citationWette, J., Sutter, F., Diamantino, T., Montecchi, M., Bern, G. & Fernandez-Garcia, A. (2025). Determination of reflectance of interest from limited state-of-the-art solar reflector field soiling measurements. In: Solar Energy, 2025, vol. 302, article 114057. https://doi.org/10.1016/j.solener.2025.114057
dc.identifier.doi10.1016/j.solener.2025.114057
dc.identifier.issn0038-092X
dc.identifier.urihttp://hdl.handle.net/10400.9/6144
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S0038092X25008205?pes=vor&utm_source=clarivate&getft_integrator=clarivate
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectConcentrated solar thermal
dc.subjectSolar thermal systems
dc.subjectSolar reflectors
dc.subjectReflectometers
dc.subjectSoiling measurements
dc.titleDetermination of reflectance of interest from limited state-of-the-art solar reflector field soiling measurementseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleSolar Energy
oaire.citation.volume302
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameWette
person.familyNameSutter
person.familyNameCunha Diamantino
person.familyNameMontecchi
person.familyNameFernández-García
person.givenNameJohannes
person.givenNameFlorian
person.givenNameTeresa
person.givenNameMarco
person.givenNameAránzazu
person.identifier.ciencia-idA81C-1FE7-1D42
person.identifier.orcid0000-0003-1389-5176
person.identifier.orcid0000-0002-2981-5807
person.identifier.orcid0000-0002-0481-0460
person.identifier.orcid0000-0002-6942-8078
person.identifier.orcid0000-0001-6044-4306
person.identifier.ridG-5063-2017
person.identifier.scopus-author-id56202276800
person.identifier.scopus-author-id35781507600
relation.isAuthorOfPublication75b52013-29b5-454c-98f3-1f2a73811b44
relation.isAuthorOfPublication3334dcfa-8d20-47c9-9ca1-17fb2fd7efdf
relation.isAuthorOfPublication706d0686-58f1-440b-a903-6f57130b962c
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relation.isAuthorOfPublicationbfc9d7d3-07cc-4f8e-9f19-d55e8498e54c
relation.isAuthorOfPublication.latestForDiscovery75b52013-29b5-454c-98f3-1f2a73811b44

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