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Monitoring of energy use, thermal comfort and indoor air quality in 69 existing office buildings in Belgium

Panel: Panel 4: Sustainable Energy Use in Buildings

Authors:
Wim De Groote, University of Ghent
Alain Bossaer, Centrum voor Energie-Efficientie
Erwin Mlecnik, Energie Duurzaam vzw
Bart Cobbaert, St. Lucas Hogeschool voor Architectuur

Abstract

During 2 years, energy use, thermal comfort and indoor air quality have been monitored in 69 existing office buildings in Belgium. The main goals were:

  1. Benchmarking the energy use for all monitored buildings

  2. Mapping relevant building and installation characteristics, such as installed lighting power density (Watt/m^2)

  3. Disaggregating measured energy use into end-uses (i.e., obtaining accurate energy balances)

  4. Finding correlations between the recorded energy use and building characteristics or measured comfort.

In all office buildings, the power and fuel consumption was recorded on a monthly basis during at least one year, while the floor area was calculated in an accurate way according to different definitions. In 48 office buildings, the characteristics of the building shell and of the installations (HVAC, lighting, and office equipment) were mapped room by room, and temperature measurements were done during at least 4 weeks in summer and 4 weeks in winter. In 10 buildings, CO_2-measurements were done in order to assess the indoor air quality.

In this poster, some results will be presented. More specifically, indicators on energy use, building geometry, equipment density, comfort parameters and energy balances will be presented.