Impact of window blinds on daylight-linked dimming and automatic on/off lighting controls

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DOIResolve DOI: http://doi.org/10.1016/j.solener.2003.12.007
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TypeArticle
Journal titleSolar Energy - Journal of the International Solar Energy Society
Volume76
Issue5
Pages523544; # of pages: 22
Subjectdaylighting, photocontrolled lighting, photocontrolled blinds, window blinds, lighting consumption, lighting systems in office buildings; Daylighting; Windows
AbstractThis paper presents the field-measured performance of two commercial photocontrolled lighting systems, continuous dimming and automatic on/off, as a function of various configurations of manual and photocontrolled automatic venetian blinds. The performance indicators considered were the space illumination and the electric lighting consumption as a function of blind slat angle and retraction area. The results showed that under clear sky and without blinds both lighting control systems reduced the lighting energy consumption on average by 50 to 60% when compared to lights fully on from 6 AM to 6 PM. These savings, however, dropped by 5 to 45% for the dimming system, and by 5 to 80% for the automatic on/off system with the introduction of various static window blind configurations. The savings in lighting energy were more significant when the lighting control systems were used with photocontrolled blinds. This was due to the capability of the blinds to adjust their position automatically in direct response to the variable daylight levels.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46780
15981
NPARC number20386292
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Record identifier32b8a46d-21b5-4ba4-bbc5-6f21086d11f3
Record created2012-07-25
Record modified2016-05-09
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