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dc.contributor.authorO’Grady, Małgorzata
dc.contributor.authorLechowska, Agnieszka A.
dc.contributor.authorHarte, Annette M.
dc.date.accessioned2019-01-11T15:02:26Z
dc.date.available2019-01-11T15:02:26Z
dc.date.issued2016-11-17
dc.identifier.citationO’Grady, Małgorzata, Lechowska, Agnieszka A., & Harte, Annette M. (2017). Infrared thermography technique as an in-situ method of assessing heat loss through thermal bridging. Energy and Buildings, 135, 20-32. doi: https://doi.org/10.1016/j.enbuild.2016.11.039en_IE
dc.identifier.issn1872-6178
dc.identifier.urihttp://hdl.handle.net/10379/14799
dc.description.abstractA key aspect in assessing the thermal standard of building envelopes is the quantification of the heat loss though thermal bridging, which can be expressed in terms of the linear thermal transmittance Psi. Values of W may be obtained from tabulated values for standard building details, from numerical modelling or from measurement. Where the internal structure of the building envelope is unknown, which is very often the case, measurement is the only option. This study shows how the infrared thermography technique (ITT) can be used as a non-invasive and easy-to-use method to provide quantitative measures of the actual thermal bridging performance. The novelty of this approach includes evaluation of the actual heat flow rate caused by thermal bridge q(TB) and Psi-value by means of the ITT solely, without any supporting methods. Another important aspect of the methodology is that it accounts for the correlation between the surface temperature and the convective and radiative heat transfer coefficients. Values for these coefficients are assessed for the whole range of the surface temperatures recorded on the thermogram resulting in improve accuracy. The q(TB) and Psi-value calculated using the presented methodology fully mirrors the real thermal performance of the thermal bridge. The methodology has been tested under laboratory conditions in a steady state in a hot box with excellent agreement. (C) 2016 Elsevier B.V. All rights reserved.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofEnergy And Buildingsen
dc.subjectBuilding envelopeen_IE
dc.subjectHeat lossesen_IE
dc.subjectThermal bridgingen_IE
dc.subjectInfrared thermography techniqueen_IE
dc.subjectQuantitative thermographyen_IE
dc.subjectHot boxen_IE
dc.subjectEXPERIMENTAL VALIDATIONen_IE
dc.subjectTRANSMITTANCE MEASUREMENTSen_IE
dc.subjectBUILDING ENVELOPEen_IE
dc.subjectCAVITY WALLen_IE
dc.subjectHOT BOXen_IE
dc.subjectPERFORMANCEen_IE
dc.subjectINSULATIONen_IE
dc.titleInfrared thermography technique as an in-situ method of assessing heat loss through thermal bridgingen_IE
dc.typeArticleen_IE
dc.date.updated2019-01-08T16:36:38Z
dc.identifier.doi10.1016/j.enbuild.2016.11.039
dc.local.publishedsourcehttps://doi.org/10.1016/j.enbuild.2016.11.039en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderEnterprise Irelanden_IE
dc.internal.rssid12104738
dc.local.contactAnnette M. Harte, Dept. Of Civil Engineering, Civil Engineering Building, Nui Galway. 2732 Email: annette.harte@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionACCEPTED
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