Influence of measurement uncertainty on classification of thermal environment in buildings according to European Standard EN 15251

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Abstract

European Standard EN 15 251 in its current version does not provide any guidance on how to handle uncertainty of long term measurements of indoor environmental parameters used for classification of buildings. The objective of the study was to analyse the uncertainty for field measurements of operative temperature and evaluate its effect on categorization of thermal environment according to EN 15251. A data-set of field measurements of operative temperature four office buildings situated in Denmark, Italy and Spain was used. Data for each building included approx. one year of continuous measurements of operative temperature at two measuring points (south/south-west and north/northeast orientation). Results of the present study suggest that measurement uncertainty needs to be considered during assessment of thermal environment in existing buildings. When expanded standard uncertainty was taken into account in categorization of thermal environment according to EN 15251, the difference in prevalence of exceeded category limits were up to 17.3%, 8.3% and 2% of occupied hours for category I, II and III respectively.
Original languageEnglish
Title of host publicationProceedings of 7PHN Sustainable Cities and Buildings
Number of pages10
Publication date2015
Publication statusPublished - 2015
Event7PHN Sustainable Cities and Buildings - Bella Center, Copenhagen, Denmark
Duration: 20 Aug 201521 Aug 2015

Conference

Conference7PHN Sustainable Cities and Buildings
LocationBella Center
CountryDenmark
CityCopenhagen
Period20/08/201521/08/2015

Keywords

  • Measurement uncertainty
  • Thermal environment
  • EN 15251
  • Operative temperature

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