ELUCIDATING THE AUTONOMY OF DAYLIGHT THROUGH LIGHT-GUIDE FILMS FOR AMBIENT LIGHTING IN THE OPEN-PLAN OFFICE THROUGH IN-SITU MONITORING

摘要

Daylight in buildings significantly affects environmental quality and energy efficiency, especially energy savings, owing to the ability of daylight to replace artificial lighting. Based on in-situ monitoring, this study evaluates the autonomy of daylight through light-guide films for ambient lighting in the open-plan office at the Industrial Technology Research Institute, Taiwan. Analysis results indicate that daylight availability in peripheral area reveals a higher probability to achieve autonomy of daylight for ambient lighting levels defined 150 lx - 250 lx in the open-plan office of round to 22,4 % in sun hours during the spring season, and of up to 60,1 % during the summer season. Both second and third row offices receive insufficient daylight for ambient lighting, suggesting that the supplement of daylight combined with autodimming lighting system is an effective design strategy for reducing energy consumption.