Identification of Parameters Affecting the Variability of Energy Use in Residential Buildings

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2016

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Energy use of buildings varies significantly. When aggregating the demand profiles of a group of buildings, the variations of energy demand are critical to determine the aggregated load profile. Especially when dimensioning district energy systems, it is important to know the variability of energy demand that can guarantee the efficient operation of the system. For this reason, it is useful to distinguish the parameters that affect building energy performance the most and to estimate the magnitude of these variations on each parameter. The aim of the present study is to identify the parameters that lead to the largest
variations in energy performance of residential buildings in Denmark. A set of sensitivity analysis has been carried out using an extensive search algorithm. These sensitivity analyses were then applied for modelling a reference building representing Danish single-family houses of the 1940’s. The study was able to
determine the key variables that affect energy use in old Danish single-family houses using sensitivity analysis and proposes a methodology for parameter optimization. This analysis pointed out that the insulation in external walls and roof lead to the largest variations in space heating demand. Also, the infiltration rate and occupancy behavior play important role on space heating consumption. It was
concluded that these findings highly depend on the specific case study and the characteristics of the buildings that are examined. If outdoor climate and location differ from the current case, a different set of parameters should be investigated upon its effect on building energy use.
Original languageEnglish
Title of host publicationProceedings of 12th REHVA World Congress:
Number of pages9
Publication date2016
StatePublished - 2016
Event12th REHVA World Congress - Aalborg, Denmark

Conference

Conference12th REHVA World Congress
CountryDenmark
CityAalborg
Period22/05/201625/05/2016
Internet address

    Keywords

  • Heat demand, Variability, Sensitivity analysis, Building parameters
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