Manual control of window blinds and electric lighting : Implications for comfort and energy consumption

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AuthorSearch for:
TypeArticle
Journal titleIndoor Environment : The Journal of Indoor Air International
ISSN1016-4901
Volume3
Issue3
Pages135144; # of pages: 10
Subjectlighting; Energy efficiency; Windows; eclairage
AbstractAlgorithms to describe the manual control of window blinds and electric lighting, in response to comfort stimuli, were incorporated into a building thermal model. By comparison with fixed control schedules, this paper examines the impact of manual control on model predictions of thermal comfort and building energy consumption. For a typical, south-facing office in Toronto, the thermal comfort of an occupant close to the window was substantially improved by the provision of window blinds. Compared to an office with no blinds, mean PPD (predicted percentage of occupants dissatisfied with the thermal environment) was lowered from 22 to 13%, and overheated hours were reduced by over 200 per year. However, when the lighting was also manually controlled, the blinds imposed an energy penalty. Though reduced solar gain lowered cooling energy by 7%, heating energy increased by 17%, and reduced daylight increased lighting energy by 66%. The implications of these results on the modelling of occupied buildings are discussed.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-3567
NRC number37021
5063
NPARC number20375438
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Record identifier3c515d4e-1a0a-45a1-a076-04ca8acdd4ad
Record created2012-07-23
Record modified2016-05-09
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