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

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.solener.2003.12.007 Society, 76, 5, pp. 523-544, 2004-05-01 Impact of window blinds on daylight-linked dimming and automatic on/off lighting controls Galasiu, A. D.; Atif, M. R.; MacDonald, R. A. 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. Solar Energy -Journal of the International Solar Energy

Retrofitting the Electric Lighting and Daylighting Systems to Reduce Energy Use in Buildings: A Literature Review

“…In the Canadian climate, Galasiu et al (2004) tested different combinations of lighting and shading control systems. For the electric lighting, the authors used dimmable and on/off daylight systems, which were combined with photo controlled blinds as well as with different cases of static positions of the blinds.…”

Effect of internal woven roller shade and glazing on the energy and daylighting performances of an office building in the cold climate of Shillong

“…On/off and continuous dimming controls are two commonly used daylight linked control systems. Previous studies showed that both of the control systems can reduce electrical lighting energy consumption significantly in the buildings that have indoor daylight access [45][46][47][48][49][50][51]. However, the on/off control system requires extra attention to adequate zoning and its calibration (based on space daylight availability) [46].…”

Automated Vertical Blinds for Daylighting in Tropical Region

“…In a high latitude region, a study conducted experiments in real offices to measure the workplane daylight illuminance from double glazed windows with horizontal slats and the resultant power consumption from dimmable light lamps [2]. The results showed that the interior daylight is influenced largely by tilted angle of the slats, varying sky conditions, and sun position relating to window orientation.…”

“…Energy savings from lighting depended on types of controls by which the continuous dimming offered in most cases higher savings than the automatic on/off. Other studies conducted daylight simulations to achieve optimal configuration and tilted angle of the slats on window [2]. Studies of windows with slats have involved in modeling of the daylight transmission.…”