Impact of the Adoption of Efficient Electrical Products and Control Technologies on Office Building Energy Use

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TypeTechnical Report
Series titleInternal Report, Institute for Research in Construction, National Research Council Canada; Volume 747
Physical description34 p.
AbstractThe energy savings attributable to efficient lighting and office equipment technologies are often quoted for the technology in isolation. However, the reduced heat generated by energy-efficient lighting and office equipment will also have an impact on the cooling and heating requirements of a building. Thus, the actual energy savings could be higher or lower than the direct electrical savings of the energy-efficient technology in isolation. This study predicts overall energy savings using DOE-2.1E simulations of a typical officebuilding in six North American climates. We performed a variety of parametric simulations, and the cooling and heating energy impacts were expressed as a fraction of the direct electrical energy impact (ACIAL and MAL, respectively). For each city, ACIAL varied little with the source of the direct savings (lighting or office equipment), building envelope variations (U-value and solar aperture), or the magnitude of the directsavings (up to 54.1 k w ) . Whether the source of the direct savings came from power density reductions or zoning/control strategies also had only a small effect However, cooling system type (economizer or futed outdoor air) had a large effect. H A L varied substantially with envelope U-value, solar aperture, and the magnitude of the direct savings. In the case of cooling, our results agree well with a previously publishedsimplified method for calculating the overall impact of lighting power density reductions, and offer the potential to expand the scope of the method. However, our results suggest that in the case of heating this simplified method may not be generally valid. Note, though, that our conclusions are based on the assumption of a VAV system with economizer, and that a strong dependence on system type is expected. Our work also led directly to a new method of generating lighting power demand profiles for office buildings,and this new method is referenced.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number7741
NPARC number20338065
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Record identifier39888364-9a46-440c-bb2c-5449eb0bd475
Record created2012-07-19
Record modified2016-10-03
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