Emissivity and reflectivity measurements for passive radiative cooling technologies
Due to their optical properties, passive radiative cooling (PRC) materials can effectively reflect solar radiation while simultaneously dissipating heat through the infrared transparency windows using outer space as a cold and renewable heat sink. This makes it possible to achieve sub-ambient temper...
| Autores: | , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/430224 |
| Acceso en línea: | https://hdl.handle.net/2117/430224 https://dx.doi.org/10.1007/s10765-025-03532-6 |
| Access Level: | acceso abierto |
| Palabra clave: | Emissivity Reflectivity Passive radiative cooling Àrees temàtiques de la UPC::Enginyeria dels materials |
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Emissivity and reflectivity measurements for passive radiative cooling technologiesAdibekyan, A.Schumacher, J.Pattelli, LorenzoManara, JochenMeriç, S.Bazkir, Ö.Cucchi, CarloSprengard, C.Jaramillo Fernández, Juliana|||0000-0002-4787-3904EmissivityReflectivityPassive radiative coolingÀrees temàtiques de la UPC::Enginyeria dels materialsDue to their optical properties, passive radiative cooling (PRC) materials can effectively reflect solar radiation while simultaneously dissipating heat through the infrared transparency windows using outer space as a cold and renewable heat sink. This makes it possible to achieve sub-ambient temperatures even in direct sunlight without using any electricity for cooling or air-conditioning. However, the accurate determination of these peculiar optical properties is challenging and subject to high uncertainty levels when using commercial instruments available to industrial end users and research laboratories. Within the EU project PaRaMetriC, aiming at establishing a metrological framework for the comparable performance evaluation of PRC technologies, the Physikalisch-Technische Bundesanstalt is leading a work package dedicated to the development of accurate and traceable methods to determine the infrared optical and thermophysical properties of PRC materials. These include reflectivity and emissivity in the broad spectral range from 250 nm to 50 µm, encompassing both, the solar spectrum (250 nm–2500 nm) and the infrared transparency window of the atmosphere (7.1 µm–13 µm) with a target absolute uncertainty of less than 0.03. For this purpose, several candidate benchmark passive cooling materials have been characterized by PTB in the wavelength range between 1.4 µm and 50 µm. The range 250 nm to 1.4 µm will be covered in an upcoming paper. Characterizations of, and comparisons between, reference and end-user measurement techniques applied for the measurements of selected PRC materials will not only allow accurate determination of the thermophysical properties, but also identification of measurement problems and suitable approaches in this rapidly expanding field.Open Access funding enabled and organized by Projekt DEAL. The project 21GRD03 PaRaMetriC receives funding from the European Partnership on Metrology, co-financed by the European Union’s Horizon Europe Research and Innovation Programme and from the Participating States.Peer ReviewedSpringer20252025-05-0120252025-05-23journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/430224https://dx.doi.org/10.1007/s10765-025-03532-6reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4302242026-05-27T15:37:01Z |
| dc.title.none.fl_str_mv |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| title |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| spellingShingle |
Emissivity and reflectivity measurements for passive radiative cooling technologies Adibekyan, A. Emissivity Reflectivity Passive radiative cooling Àrees temàtiques de la UPC::Enginyeria dels materials |
| title_short |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| title_full |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| title_fullStr |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| title_full_unstemmed |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| title_sort |
Emissivity and reflectivity measurements for passive radiative cooling technologies |
| dc.creator.none.fl_str_mv |
Adibekyan, A. Schumacher, J. Pattelli, Lorenzo Manara, Jochen Meriç, S. Bazkir, Ö. Cucchi, Carlo Sprengard, C. Jaramillo Fernández, Juliana|||0000-0002-4787-3904 |
| author |
Adibekyan, A. |
| author_facet |
Adibekyan, A. Schumacher, J. Pattelli, Lorenzo Manara, Jochen Meriç, S. Bazkir, Ö. Cucchi, Carlo Sprengard, C. Jaramillo Fernández, Juliana|||0000-0002-4787-3904 |
| author_role |
author |
| author2 |
Schumacher, J. Pattelli, Lorenzo Manara, Jochen Meriç, S. Bazkir, Ö. Cucchi, Carlo Sprengard, C. Jaramillo Fernández, Juliana|||0000-0002-4787-3904 |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
Emissivity Reflectivity Passive radiative cooling Àrees temàtiques de la UPC::Enginyeria dels materials |
| topic |
Emissivity Reflectivity Passive radiative cooling Àrees temàtiques de la UPC::Enginyeria dels materials |
| description |
Due to their optical properties, passive radiative cooling (PRC) materials can effectively reflect solar radiation while simultaneously dissipating heat through the infrared transparency windows using outer space as a cold and renewable heat sink. This makes it possible to achieve sub-ambient temperatures even in direct sunlight without using any electricity for cooling or air-conditioning. However, the accurate determination of these peculiar optical properties is challenging and subject to high uncertainty levels when using commercial instruments available to industrial end users and research laboratories. Within the EU project PaRaMetriC, aiming at establishing a metrological framework for the comparable performance evaluation of PRC technologies, the Physikalisch-Technische Bundesanstalt is leading a work package dedicated to the development of accurate and traceable methods to determine the infrared optical and thermophysical properties of PRC materials. These include reflectivity and emissivity in the broad spectral range from 250 nm to 50 µm, encompassing both, the solar spectrum (250 nm–2500 nm) and the infrared transparency window of the atmosphere (7.1 µm–13 µm) with a target absolute uncertainty of less than 0.03. For this purpose, several candidate benchmark passive cooling materials have been characterized by PTB in the wavelength range between 1.4 µm and 50 µm. The range 250 nm to 1.4 µm will be covered in an upcoming paper. Characterizations of, and comparisons between, reference and end-user measurement techniques applied for the measurements of selected PRC materials will not only allow accurate determination of the thermophysical properties, but also identification of measurement problems and suitable approaches in this rapidly expanding field. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025-05-01 2025 2025-05-23 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/430224 https://dx.doi.org/10.1007/s10765-025-03532-6 |
| url |
https://hdl.handle.net/2117/430224 https://dx.doi.org/10.1007/s10765-025-03532-6 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
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openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Springer |
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Springer |
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reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
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Universitat Politècnica de Catalunya (UPC) |
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UPCommons. Portal del coneixement obert de la UPC |
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