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dc.contributor.authorTejedor Herrán, Blanca
dc.contributor.authorBarreira, Eva
dc.contributor.authorAlmeida, Ricardo M. S. F.
dc.contributor.authorCasals Casanova, Miquel
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Enginyeria Ambiental
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció
dc.identifier.citationTejedor, B. [et al.]. Thermographic 2D U-value map for quantifying thermal bridges in building façades. "Energy and buildings", 1 Octubre 2020, vol. 224, p. 110176:1-110176:13.
dc.description.abstractThermal bridges accounted for 30% of the impact on the energy performance of European residential building stock. Nevertheless, European countries and their standards do not take into account the influences of this type of anomaly. Furthermore, current methods for quantifying thermal bridges have three main drawbacks. Firstly, most of approaches consist of complex models based on fluid dynamics or finite elements as calculation procedure. Secondly, the disturbances of a thermal bridge can’t be assessed along the vertical and horizontal axis of a wall surface area, since the current methods only allow to perform local measurements. Thirdly, the stratigraphy and morphology of wall is unknown in most cases. Hence, this research proposes the implementation of a 2D U-value map to quantify the influence of thermal bridges in three heavy walls by internal quantitative infrared thermography (QIRT). The measurement campaigns were conducted on a walk-in climatic chamber to monitor and evaluate full-scale building elements. The results demonstrated that the use of 2D U-value maps could help to delimit the geometry of a thermal bridge as well as its area of greater influence, to quantify the U-value in any point of an entire wall with acceptable reliability and, to provide real information about the thermal behaviour of air voids inside opaque façades. Indeed, the U-value results measured by HFM and QIRT were similar in the inhomogeneous wall areas (from 0.08 to 8.55% of difference in most cases). In this way, the operational life of a building could be enhanced with specific refurbishment procedures.
dc.description.sponsorshipThis work was financially supported by: Base Funding UID/ECI/04708/2019 of the CONSTRUCT - Instituto de I&D em Estruturas e Construções- funded by national funds through the FCT/MCTES (PIDDAC)
dc.subjectÀrees temàtiques de la UPC::Edificació
dc.subject.lcshBuildings -- Energy conservation
dc.subject.otherQuantitative infrared thermography (IRT)
dc.subject.otherThermal bridges
dc.subject.other2D map
dc.titleThermographic 2D U-value map for quantifying thermal bridges in building façades
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.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
local.citation.authorTejedor, B.; Barreira, E.; Almeida, R.; Casals, M.
local.citation.publicationNameEnergy and buildings

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