SET Proceedings 2978-4387 Caravel Press 10.65582/set.2010.139 2010.139 Daylight Utilization and Lighting Saving Analysis of Office Buildings ChenHongbing WeiPing LiDeying School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China Department of Civil Engineering, Beijing Polytechnic College, Beijing, China 24082010 9 978-1-995850-04-7 1 6 24 August 2010 © 2010 Copyright WSSET 2010

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.

 daylight illuninance distribution lighting saving 24 to 27 August 2010 9th International Conference on Sustainable Energy Technologies SET2010 9 Shanghai, China