Uncertainty of Energy Consumption Assessment of Domestic Buildings

Henrik Brohus, Per Heiselberg, A. Simonsen, K.C. Sørensen

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Abstract

In order to assess the influence of energy reduction initiatives, to determine the expected annual cost, to calculate life cycle cost, emission impact, etc. it is crucial to be able to assess the energy consumption reasonably accurate.

The present work undertakes a theoretical and empirical study of the uncertainty of energy consumption assessment of domestic buildings. The calculated energy consumption of a number of almost identical domestic buildings in Denmark is compared with the measured energy consumption. Furthermore, the uncertainty is determined by means of stochastic modelling based on input distributions found by literature study, industry guidelines, measurements and - when necessary - simple assumptions.

A number of parameters are investigated and ranked in terms of importance to determine which ones contribute the most to the overall level of uncertainty. Measurements and simulations are found to correspond reasonably well; however, it is also found that significant differences may occur between calculated and measured energy consumption due to the spread and due to the fact that the result can only be determined with a certain probability. It is found that occupants' behaviour is the major contributor to the variance of the energy consumption.
Original languageEnglish
Title of host publicatione-nova Internationaler Kongress 2009 : Null Emissions Gebäude : Gebäude, Gebäudeteile, Anlagen, Anlagenkomponenten, Energie- und Gebäudekonzepte
EditorsHildegard Gremmel-Simon
PublisherFachhochschulstudiengänge Burgenland
Publication date2009
Pages31-38
ISBN (Print)9783950091991
Publication statusPublished - 2009
Evente-nova Internationaler Kongress - Pinkafeld, Austria
Duration: 19 Nov 200920 Nov 2009

Conference

Conferencee-nova Internationaler Kongress
CountryAustria
CityPinkafeld
Period19/11/200920/11/2009

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