Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography

Within the European context, most of the current residential building stock does not fulfil minimum thermal requirements and needs to be refurbished urgently. Quantitative internal infrared thermography can provide valuable information about the in-situ thermal transmittance of existing buildings fo...

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Autores: Tejedor Herrán, Blanca|||0000-0002-2064-0617, Casals Casanova, Miquel|||0000-0001-5379-894X, Gangolells Solanellas, Marta|||0000-0001-7921-595X
Tipo de recurso: artículo
Fecha de publicación:2018
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:2117/116689
Acceso en línea:https://hdl.handle.net/2117/116689
https://dx.doi.org/10.1016/j.enbuild.2018.04.011
Access Level:acceso abierto
Palabra clave:Thermography
Facades--Insulation (Heat)
Buildings--Energy conservation
Quantitative internal infrared thermography (IRT)
Measured U-value
in-situ measurement
Building façade
Real built environment
Heavy single-leaf walls
Heavy multi-leaf walls
Operating conditions
Heat capacity per unit of area
Kappa value
Termografia
Façanes -- Aïllament tèrmic
Edificis -- Estalvi d'energia
Àrees temàtiques de la UPC::Edificació
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spelling Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermographyTejedor Herrán, Blanca|||0000-0002-2064-0617Casals Casanova, Miquel|||0000-0001-5379-894XGangolells Solanellas, Marta|||0000-0001-7921-595XThermographyFacades--Insulation (Heat)Buildings--Energy conservationQuantitative internal infrared thermography (IRT)Measured U-valuein-situ measurementBuilding façadeReal built environmentHeavy single-leaf wallsHeavy multi-leaf wallsOperating conditionsHeat capacity per unit of areaKappa valueTermografiaFaçanes -- Aïllament tèrmicEdificis -- Estalvi d'energiaÀrees temàtiques de la UPC::EdificacióWithin the European context, most of the current residential building stock does not fulfil minimum thermal requirements and needs to be refurbished urgently. Quantitative internal infrared thermography can provide valuable information about the in-situ thermal transmittance of existing buildings for their future refurbishment. This paper aims to establish how operating conditions and thermophysical properties might affect the accuracy of the measured U-value using this technique. To assess the most influential operating conditions, one experimental room with a heavy single leaf-wall was chosen to develop the research in quasi steady-state conditions, with a wide temperature difference range (3.8<¿T<21°C). A statistical analysis demonstrated that the variance in thermal transmittance could mainly be predicted by changes in the outer air temperature. To analyze the impact of the thermophysical properties, specifically the heat capacity per unit of area, four unoccupied residential buildings with heavy multi-leaf walls were tested (6<¿T<10°C). The results mainly showed that the quantitative internal infrared thermography method is more accurate in heavy multi-leaf walls with high kappa values, reaching maximum deviations of 0.20%.Peer Reviewed20182018-07-1520182018-04-25journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/116689https://dx.doi.org/10.1016/j.enbuild.2018.04.011reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1166892026-05-27T15:37:01Z
dc.title.none.fl_str_mv Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
title Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
spellingShingle Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
Tejedor Herrán, Blanca|||0000-0002-2064-0617
Thermography
Facades--Insulation (Heat)
Buildings--Energy conservation
Quantitative internal infrared thermography (IRT)
Measured U-value
in-situ measurement
Building façade
Real built environment
Heavy single-leaf walls
Heavy multi-leaf walls
Operating conditions
Heat capacity per unit of area
Kappa value
Termografia
Façanes -- Aïllament tèrmic
Edificis -- Estalvi d'energia
Àrees temàtiques de la UPC::Edificació
title_short Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
title_full Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
title_fullStr Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
title_full_unstemmed Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
title_sort Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
dc.creator.none.fl_str_mv Tejedor Herrán, Blanca|||0000-0002-2064-0617
Casals Casanova, Miquel|||0000-0001-5379-894X
Gangolells Solanellas, Marta|||0000-0001-7921-595X
author Tejedor Herrán, Blanca|||0000-0002-2064-0617
author_facet Tejedor Herrán, Blanca|||0000-0002-2064-0617
Casals Casanova, Miquel|||0000-0001-5379-894X
Gangolells Solanellas, Marta|||0000-0001-7921-595X
author_role author
author2 Casals Casanova, Miquel|||0000-0001-5379-894X
Gangolells Solanellas, Marta|||0000-0001-7921-595X
author2_role author
author
dc.subject.none.fl_str_mv Thermography
Facades--Insulation (Heat)
Buildings--Energy conservation
Quantitative internal infrared thermography (IRT)
Measured U-value
in-situ measurement
Building façade
Real built environment
Heavy single-leaf walls
Heavy multi-leaf walls
Operating conditions
Heat capacity per unit of area
Kappa value
Termografia
Façanes -- Aïllament tèrmic
Edificis -- Estalvi d'energia
Àrees temàtiques de la UPC::Edificació
topic Thermography
Facades--Insulation (Heat)
Buildings--Energy conservation
Quantitative internal infrared thermography (IRT)
Measured U-value
in-situ measurement
Building façade
Real built environment
Heavy single-leaf walls
Heavy multi-leaf walls
Operating conditions
Heat capacity per unit of area
Kappa value
Termografia
Façanes -- Aïllament tèrmic
Edificis -- Estalvi d'energia
Àrees temàtiques de la UPC::Edificació
description Within the European context, most of the current residential building stock does not fulfil minimum thermal requirements and needs to be refurbished urgently. Quantitative internal infrared thermography can provide valuable information about the in-situ thermal transmittance of existing buildings for their future refurbishment. This paper aims to establish how operating conditions and thermophysical properties might affect the accuracy of the measured U-value using this technique. To assess the most influential operating conditions, one experimental room with a heavy single leaf-wall was chosen to develop the research in quasi steady-state conditions, with a wide temperature difference range (3.8<¿T<21°C). A statistical analysis demonstrated that the variance in thermal transmittance could mainly be predicted by changes in the outer air temperature. To analyze the impact of the thermophysical properties, specifically the heat capacity per unit of area, four unoccupied residential buildings with heavy multi-leaf walls were tested (6<¿T<10°C). The results mainly showed that the quantitative internal infrared thermography method is more accurate in heavy multi-leaf walls with high kappa values, reaching maximum deviations of 0.20%.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-07-15
2018
2018-04-25
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/116689
https://dx.doi.org/10.1016/j.enbuild.2018.04.011
url https://hdl.handle.net/2117/116689
https://dx.doi.org/10.1016/j.enbuild.2018.04.011
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-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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