Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity

Radiative cooling is a natural process to cool down surfaces through the rejection of thermal radiation using the outer space as a cold sink, taking advantage of the transparency of the atmospheric windows (8–14 µm), which partially matches the infrared radiation band. With the development of new ma...

ver descrição completa

Detalhes bibliográficos
Autores: Vilà Miró, Roger, Medrano Martorell, Marc, Castell, Albert
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2021
País:España
Recursos:Universitat de Lleida (UdL)
Repositório:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/72010
Acesso em linha:https://doi.org/10.3390/atmos12091119
http://hdl.handle.net/10459.1/72010
Access Level:Acceso aberto
Palavra-chave:Radiative cooling
Nighttime radiative cooling
Daytime radiative cooling
All-day radiative cooling
id ES_15f0cf92a2a0d746b672368d189eeed1
oai_identifier_str oai:repositori.udl.cat:10459.1/72010
network_acronym_str ES
network_name_str España
repository_id_str
spelling Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar ReflectivityVilà Miró, RogerMedrano Martorell, MarcCastell, AlbertRadiative coolingNighttime radiative coolingDaytime radiative coolingAll-day radiative coolingRadiative cooling is a natural process to cool down surfaces through the rejection of thermal radiation using the outer space as a cold sink, taking advantage of the transparency of the atmospheric windows (8–14 µm), which partially matches the infrared radiation band. With the development of new materials that have a high reflectivity of solar radiation, daytime radiative cooling can be achieved. This phenomenon depends on the optical properties of the surface and the local weather conditions. In this research, climatological data from 1791 weather stations were used to present detailed nighttime and all-day radiative cooling maps for the potential implementation of radiative cooling-based technologies. The paper offers a parametric study of the variation of the potential as a result of decreasing the solar reflectivity. The results show that southern Europe is the region with the highest potential while northern Europe holds more hours of available radiative cooling. After varying the solar reflectivity from 1 to 0.5 the average power reduces from 60.18 to 45.32 W/m2 , and energy from 527.10 to 264.87 kWh/m2 ·year. For solar reflectivity lower than 0.5, all-day radiative coolers behave as nighttime radiative coolers, but power and energy values improve significantly for high values of solar reflectivity. Small variations of solar reflectivity have greater impacts on the potential at higher reflectivity values than at lower ones.This research was funded by the Catalan Government, grant number 2017 SGR 659, and by the Spanish government (Ministerio de Ciencia, Innovación y Universidades), grant number RTI2018-097669-A-I00MDPI2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.3390/atmos12091119http://hdl.handle.net/10459.1/72010reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097669-A-I00Reproducció del document publicat a https://doi.org/10.3390/atmos12091119Atmosphere, 2021, vol. 12, núm. 9, 1119cc-by (c) Roger Vilà, Marc Medrano, Albert Castell, 2021info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/720102026-06-24T12:42:17Z
dc.title.none.fl_str_mv Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
title Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
spellingShingle Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
Vilà Miró, Roger
Radiative cooling
Nighttime radiative cooling
Daytime radiative cooling
All-day radiative cooling
title_short Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
title_full Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
title_fullStr Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
title_full_unstemmed Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
title_sort Mapping Nighttime and All-Day Radiative Cooling Potential in Europe and the Influence of Solar Reflectivity
dc.creator.none.fl_str_mv Vilà Miró, Roger
Medrano Martorell, Marc
Castell, Albert
author Vilà Miró, Roger
author_facet Vilà Miró, Roger
Medrano Martorell, Marc
Castell, Albert
author_role author
author2 Medrano Martorell, Marc
Castell, Albert
author2_role author
author
dc.subject.none.fl_str_mv Radiative cooling
Nighttime radiative cooling
Daytime radiative cooling
All-day radiative cooling
topic Radiative cooling
Nighttime radiative cooling
Daytime radiative cooling
All-day radiative cooling
description Radiative cooling is a natural process to cool down surfaces through the rejection of thermal radiation using the outer space as a cold sink, taking advantage of the transparency of the atmospheric windows (8–14 µm), which partially matches the infrared radiation band. With the development of new materials that have a high reflectivity of solar radiation, daytime radiative cooling can be achieved. This phenomenon depends on the optical properties of the surface and the local weather conditions. In this research, climatological data from 1791 weather stations were used to present detailed nighttime and all-day radiative cooling maps for the potential implementation of radiative cooling-based technologies. The paper offers a parametric study of the variation of the potential as a result of decreasing the solar reflectivity. The results show that southern Europe is the region with the highest potential while northern Europe holds more hours of available radiative cooling. After varying the solar reflectivity from 1 to 0.5 the average power reduces from 60.18 to 45.32 W/m2 , and energy from 527.10 to 264.87 kWh/m2 ·year. For solar reflectivity lower than 0.5, all-day radiative coolers behave as nighttime radiative coolers, but power and energy values improve significantly for high values of solar reflectivity. Small variations of solar reflectivity have greater impacts on the potential at higher reflectivity values than at lower ones.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.3390/atmos12091119
http://hdl.handle.net/10459.1/72010
url https://doi.org/10.3390/atmos12091119
http://hdl.handle.net/10459.1/72010
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097669-A-I00
Reproducció del document publicat a https://doi.org/10.3390/atmos12091119
Atmosphere, 2021, vol. 12, núm. 9, 1119
dc.rights.none.fl_str_mv cc-by (c) Roger Vilà, Marc Medrano, Albert Castell, 2021
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Roger Vilà, Marc Medrano, Albert Castell, 2021
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403827027836928
score 15,198674

Registros relacionados