IEEJ Transactions on Fundamentals and Materials
Online ISSN : 1347-5533
Print ISSN : 0385-4205
ISSN-L : 0385-4205
Paper
Simulation on Angle Adjustment of Blind Shaped Reflectors Installed in Windows for Daylight Utilization in Room Lighting System
Chenglin LiMahmudul KabirNoboru Yoshimura
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2018 Volume 138 Issue 8 Pages 416-421

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Abstract

Illumination covers almost 20%-30% of total electric consumption in office buildings. Using daylight may be a good choice to reduce lighting power consumption. However, the sunlight is dazzling when it enters the room directly and thus cannot be used as a direct light source. Therefore, it is necessary to develop a window system that combines seasonal strong light shielding and daylight utilization as well. In this paper the angle change type blind reflection plate is proposed where the entering sunlight will be reflected to the ceiling and act as a light source for the interior illumination. We have made a simulator for interior illumination system which can be used in any season in a year and it is also applicable in any size of the room. The simulator can use the daylight and has showed a very accurate illumination distribution results which supports the idea that using daylight in interior illumination is good for reducing the electricity consumption in offices.

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© 2018 by the Institute of Electrical Engineers of Japan
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