Utilization of Natural Daylight in Office Buildings

Author(s): Hongbing Chena*, Ping Weib
a Beijing University of Civil Engineering and Architecture, 1 Zhanlanguan Road, Beijing 100044, China
b Beijing Polytechnic College, 106 Shimen Road, Beijing 100048, China
International Journal of Smart Grid and Clean Energy, vol. 2, no. 2, May 2013: pp. 301–306
ISSN: 2315-4462
Digital Object Identifier: 10.12720/sgce.2.2.301-306


Abstract: Daylight utilization in office buildings for creating natural indoor working condition and saving lighting consumption was reported in this paper. An office model was developed for the simulation on the influence of glazing transmittance, sill height and Window-to-wall Area Ratio (WAR) on indoor illuminance distribution and lighting saving. The equations expressing the relationship between the illuminance and the affecting factors were presented. The simulation results indicated that the lighting saving was a quadratic function of glazing transmittance. The increase of sill height by 0.1m produced an increased lighting saving of 0.219 W/m2 in sunny day as well as 0.225 W/m2 in cloudy day. The increase of WAR by 0.1 produced an increased lighting saving of 2.719 W/m2 in sunny day as well as 1.687 W/m2 in cloudy day.

Keywords: Daylight, illuninance distribution, lighting saving

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