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Building performance based on measured data [Elektronisk resurs]

Andersson, Staffan, 1952- (författare)
World Renewable Energy Congress, 8-13 May 2011, Linköping, Sweden 
Sjögren, Jan-Ulric, 1958- (författare)
Östin, Ronny, 1954- (författare)
Olofsson, Thomas, 1968- (författare)
Umeå universitet Teknisk-naturvetenskapliga fakulteten (utgivare)
Publicerad: Linköping : Linköping University Electronic Press, 2011
Engelska.
Serie: Linköping Electronic Conference Proceedings, 1650-3740
Ingår i: World Renewable Energy Congress – Sweden, 8–13 May, 2011, Linköping, Sweden. ; 899-906
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  • With increasing liability for builders, the need for evaluation methods that focuses on the building’s performance and thus excludes the impact from residents’ behavior increases. This is not only of interest for new buildings but also when retrofitting existing buildings in order to reduce energy end-use. The investigation in this paper is based on extensive measurements on two fairly representative type of buildings, a single family building in Ekerö, Stockholm built 2000 and two apartment buildings in Umeå (1964) in order to extract key energy performance parameters such as the building’s heat loss coefficient, heat transfer via the ground and heat gained from the sun and used electricity. With access to pre-processed daily data from a 2-month periods, located close to the winter solstice, a robust estimate of the heat loss coefficient was obtained based on a regression analysis. For the single family building the variation was within 1% and for the two heavier apartment buildings an average variation of 2%, with a maximum of 4%, between different analyzed periods close to the winter solstice. The gained heating from the used electricity in terms of a gain factor could not be unambiguously extracted and therefore could only a range for the heat transfer via ground be estimated. The estimated range for the transfer via ground for the two apartment buildings were in very good agreement with those calculated according to EN ISO 13 370 and corresponded to almost 10% of the heating demand at the design temperature. For the single family building with an insulated slab and parts of the walls below ground level, the calculations gave slightly higher transfer than what was obtained from the regression analysis. For the estimated gained solar radiation no comparison has been possible to make, but the estimated gain exhibited an expected correlation with the global solar radiation data that was available for the two apartment buildings. 

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Engineering and Technology  (hsv)
Teknik och teknologier  (hsv)

Indexterm och SAB-rubrik

Regression analysis
Heat loss coefficient
Heat transfer via ground
Gained heat
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