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dc.contributor.authorGustavsen, Arild
dc.contributor.authorGrynning, Steinar
dc.contributor.authorArasteh, Dariush
dc.contributor.authorJelle, Bjørn Petter
dc.contributor.authorGoudey, Howdy
dc.date.accessioned2018-01-05T12:11:09Z
dc.date.available2018-01-05T12:11:09Z
dc.date.created2011-09-06T15:10:02Z
dc.date.issued2011
dc.identifier.citationEnergy and Buildings. 2011, 43 (10), 2583-2594.nb_NO
dc.identifier.issn0378-7788
dc.identifier.urihttp://hdl.handle.net/11250/2476021
dc.description.abstractThe thermal performance of windows is important for energy efficient buildings. Windows typically account for about 30–50 percent of the transmission losses though the building envelope, even if their area fraction of the envelope is far less. The reason for this can be found by comparing the thermal transmittance (U-factor) of windows to the U-factor of their opaque counterparts (wall, roof and floor constructions). In well insulated buildings the U-factor of walls, roofs and floors can be between 0.1 and 0.2 W/(m2 K). The best windows have U-factors of about 0.7–1.0. It is therefore obvious that the U-factor of windows needs to be reduced, even though looking at the whole energy balance for windows (i.e., solar gains minus transmission losses) makes the picture more complex. In high performance windows the frame design and material use are of utmost importance, as the frame performance is usually the limiting factor for reducing the total window U-factor further. This paper describes simulation studies analyzing the effects on frame and edge-of-glass U-factors of different surface emissivities as well as frame material and spacer conductivities. The goal of this work is to define material research targets for window frame components that will result in better frame thermal performance than is exhibited by the best products available on the market today.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.titleKey Elements of and Materials Performance Targets for Highly Insulating Window Framesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber2583-2594nb_NO
dc.source.volume43nb_NO
dc.source.journalEnergy and Buildingsnb_NO
dc.source.issue10nb_NO
dc.identifier.doi10.1016/j.enbuild.2011.05.010
dc.identifier.cristin837321
dc.relation.projectNorges forskningsråd: 207551nb_NO
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2011 by Elseviernb_NO
cristin.unitcode194,61,25,0
cristin.unitcode194,64,35,0
cristin.unitnameInstitutt for byggekunst, historie og teknologi
cristin.unitnameInstitutt for bygg, anlegg og transport
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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