Accurate and reliable U-value assessment of argon-filled double glazed windows: A numerical and experimental investigation

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dc.authoridCuce, Erdem/0000-0003-0150-4705
dc.contributor.authorCuce, Erdem
dc.date.accessioned2024-10-04T18:48:10Z
dc.date.available2024-10-04T18:48:10Z
dc.date.issued2018
dc.departmentBayburt Üniversitesien_US
dc.description.abstractU-value assessment is a significant process to be able to evaluate the thermal insulation performance of building materials notably windows. About 60% of energy losses from building envelope is attributed to windows, hence accurate and reliable thermal resistance evaluation of glazed areas is of vital importance for a sensitive energy demand analysis of buildings. U-value assessment of windows is usually conducted through theoretical and numerical methods in literature. However, dwellers frequently complain about the insufficient thermal insulation performance of commercial glazing products when compared to the reported U-values in datasheets. This inconvenience arises from the lack of comprehensive experimental tests which simulate the actual operating conditions. Therefore, in this research, argon filled double glazed windows, which is one the most common fenestration products in market, is numerically and experimentally analysed in terms of U-value performance. Although computational fluid dynamics (CFD) analyses reveal that the U-value of the reference sample (4 mm pane + 20 mm argon + 4 mm pane) is 0.89 W/m(2)K, which is in good accordance with the theoretical data (0.80 W/m(2)K), it is observed from the environmental chamber tests that the U-value in simulated operating conditions is 1.25, 1.18 and 1.32 W/m(2)K for top, centre and lower positions of the window sample. The tests are repeated for accuracy verification, and the U-value is found to be 1.23, 1.18 and 1.31 W/m(2)K for the said points. In this respect, it is concluded that thermal bridges and edge effects play a key role in actual U-value performance of glazing products. Therefore, experimental performance figures are recommended to be utilised in energy demand analyses of buildings. (C) 2018 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipTUBITAK (The Scientific and Technological Research Council of Turkey) [216M531]en_US
dc.description.sponsorshipThe author gratefully acknowledges the financial support of TUBITAK (The Scientific and Technological Research Council of Turkey) through the Project grant of 216M531.en_US
dc.identifier.doi10.1016/j.enbuild.2018.04.036
dc.identifier.endpage106en_US
dc.identifier.issn0378-7788
dc.identifier.issn1872-6178
dc.identifier.startpage100en_US
dc.identifier.urihttps://doi.org/10.1016/j.enbuild.2018.04.036
dc.identifier.urihttp://hdl.handle.net/20.500.12403/2946
dc.identifier.volume171en_US
dc.identifier.wosWOS:000435625800009en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofEnergy and Buildingsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectU-value assessmenten_US
dc.subjectDouble glazed windowsen_US
dc.subjectThermal resistanceen_US
dc.subjectEnergy losses in buildingsen_US
dc.titleAccurate and reliable U-value assessment of argon-filled double glazed windows: A numerical and experimental investigationen_US
dc.typeArticleen_US

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