Show simple item record

dc.contributor.authorTejedor Herrán, Blanca
dc.contributor.authorCasals Casanova, Miquel
dc.contributor.authorGangolells Solanellas, Marta
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció
dc.identifier.citationTejedor, B., Casals, M., Gangolells, M. Assessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography. "Energy and buildings",15 Juliol 2018, vol. 171, p. 64-75.
dc.description.abstractWithin 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%.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Edificació
dc.subject.lcshFacades--Insulation (Heat)
dc.subject.lcshBuildings--Energy conservation
dc.subject.otherQuantitative internal infrared thermography (IRT)
dc.subject.otherMeasured U-value
dc.subject.otherin-situ measurement
dc.subject.otherBuilding façade
dc.subject.otherReal built environment
dc.subject.otherHeavy single-leaf walls
dc.subject.otherHeavy multi-leaf walls
dc.subject.otherOperating conditions
dc.subject.otherHeat capacity per unit of area
dc.subject.otherKappa value
dc.titleAssessing the influence of operating conditions and thermophysical properties on the accuracy of in-situ measured U-values using quantitative internal infrared thermography
dc.subject.lemacFaçanes -- Aïllament tèrmic
dc.subject.lemacEdificis -- Estalvi d'energia
dc.contributor.groupUniversitat Politècnica de Catalunya. GRIC - Grup de Recerca i Innovació de la Construcció
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorTejedor, B.; Casals, M.; Gangolells, M.
local.citation.publicationNameEnergy and buildings

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain