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dc.contributor.authorGullbrekken, Lars
dc.contributor.authorUvsløkk, Sivert
dc.contributor.authorKvande, Tore
dc.contributor.authorTime, Berit
dc.date.accessioned2017-11-30T12:04:55Z
dc.date.available2017-11-30T12:04:55Z
dc.date.created2016-09-20T08:38:51Z
dc.date.issued2016
dc.identifier.citationJournal of Building Physics. 2016, 41 (1), 58-77.nb_NO
dc.identifier.issn1744-2591
dc.identifier.urihttp://hdl.handle.net/11250/2468641
dc.description.abstractThe purpose of this study was to investigate how natural convection in air permeable glass wool insulation affects the thermal transmittance in walls, roofs and floor structures. The results can be used to evaluate the need for a convection barrier in thick mineral wool layers. Natural convection is affected by several parameters. In this study, the angle of inclination, the heat flow direction and the temperature difference across the test section have been studied. Thermal transmittance and temperature distribution measured by use of thermocouples placed inside the insulation cavity clearly showed convection in the insulation when the test section was in pitched roof and wall positions. An efficient measure to reduce the natural convection is to divide the insulation layer into two thinner layers by using a diffusion open convection barrier. A convection barrier is recommended by the authors both in wall and pitched roof structures if the insulation thickness exceeds 200 mm.nb_NO
dc.language.isoengnb_NO
dc.publisherSAGE Publicationsnb_NO
dc.subjectlaboratory measurementsnb_NO
dc.subjectHot-Boxnb_NO
dc.subjectNatural convectionnb_NO
dc.subjectHeat transfernb_NO
dc.subjectInsulationnb_NO
dc.titleHot-Box measurements of highly insulated wall, roof and floor structuresnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holder© Preprint version the authors. This is the authors' accepted manuscript to the article. The final publication is available at https://doi.org/10.1177/1744259116669516nb_NO
dc.subject.nsiVDP::Technology: 500nb_NO
dc.source.pagenumber58-77nb_NO
dc.source.volume41nb_NO
dc.source.journalJournal of Building Physicsnb_NO
dc.source.issue1nb_NO
dc.identifier.doi10.1177/1744259116669516
dc.identifier.cristin1383033
dc.relation.projectNorges forskningsråd: 237859nb_NO
cristin.unitcode7401,30,40,0
cristin.unitnameArkitektur, byggematerialer og konstruksjoner
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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