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dc.contributor.authorLolli, Nicola
dc.contributor.authorHaase, Matthias
dc.date.accessioned2017-11-28T06:48:21Z
dc.date.available2017-11-28T06:48:21Z
dc.date.created2017-11-27T09:11:56Z
dc.date.issued2017
dc.identifier.citationEnergy Procedia. 2017, 132 903-908.nb_NO
dc.identifier.issn1876-6102
dc.identifier.urihttp://hdl.handle.net/11250/2468185
dc.description.abstractEnergy retrofitting solutions applied in residential building envelopes often consist in adding an insulation layer on the building facade and substituting the old windows with better performing ones. Such measures increase the thermal insulation of the envelope and reduce the energy need for space heating, but also reduce the daylight availability, due to the lower visible transmittance of highly insulated windows. This drawback may have strong effect in Norway, where the daylight availability in the winter season is little. This paper investigates into the consequences on energy use for space heating and electricity use for lighting given by the substitution of existing windows with highly insulated windows in Norwegian residential buildings. Three apartment buildings with different construction systems of the external facades and located in Trondheim are investigated. The buildings were built before the 1900, in the first decade of the 1900, and in the 1960s, respectively. The U-value of the external facades varies from 0.96 W/m2K to 0.26 W/m2K, and the U-value of the existing windows varies from 1.6 W/m2K to 2.8 W/m2K. The new windows have a U-value of 0.5 W/m2K. Scenarios are modelled to simulate the use patterns of artificial lighting in the apartments. Use patterns are modelled by considering occupancy hours and type of activity to cover different scenarios. Results show that the substitution of the existing windows reduces the median value of the Daylight Autonomy by at least 50%, and the additional electricity use for lighting is calculated to be between 17% and 64% of the potential energy saving for space heating.nb_NO
dc.language.isoengnb_NO
dc.publisherElsevier Ltd.nb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectApartment buildingsnb_NO
dc.subjectArtificial lightingnb_NO
dc.subjectConstruction systemsnb_NO
dc.subjectDaylight autonomiesnb_NO
dc.subjectDaylight availabilitynb_NO
dc.subjectElectricity usenb_NO
dc.subjectResidential buildingnb_NO
dc.subjectVisible transmittancenb_NO
dc.subjectApartment housesnb_NO
dc.subjectEnergy conservationnb_NO
dc.subjectEnergy efficiencynb_NO
dc.subjectEnergy utilizationnb_NO
dc.subjectFacadesnb_NO
dc.subjectHousingnb_NO
dc.subjectSpace-heatingnb_NO
dc.subjectThermal insulationnb_NO
dc.subjectWindowsnb_NO
dc.titleConsequences of energy retrofitting on the daylight availability in Norwegian apartmentsnb_NO
dc.title.alternativeNordic Symposium on Building Physics, NSB 2017, June 11, 2017nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.rights.holder© The authorsnb_NO
dc.subject.nsiVDP::Technology: 500nb_NO
dc.source.pagenumber903-908nb_NO
dc.source.volume132nb_NO
dc.source.journalEnergy Procedianb_NO
dc.identifier.doi10.1016/j.egypro.2017.09.713
dc.identifier.cristin1518633
cristin.unitcode7401,30,40,0
cristin.unitnameArkitektur, byggematerialer og konstruksjoner
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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