2024 - Control Daylighting System, Light shelf with translucent ceiling and static louver 90 degree

Daylight control strategies were a challenge for a high-rise building in Bangkok, Thailand, in terms of saving energy consumption. A light shelf was one of the daylight control systems, which were usually horizontal or inclined surfaces placed on the inner and/or outer sides of windows to reflect sunlight to the ceiling and distribute the light deeper into the room. This case study aim to investigate light shelf with translucent ceiling and static louver in purpose to increase illuminance deep side of the room and uniformity. Five different daylight method was create and Dialux 4.13 program was chose to simulate the illuminance and uniformity compare to the standard office room. According to the CIBSE and IESNA standard, office room should have minimum illuminance average 500 lux and uniformity not less than 0.8. Four orientation, during working hours from 9:00 am to 5:00 pm under clear sky condition was simulate and make a comparative between fives option. After simulate, the result reveal that option which use light shelf with translucent and static louver 90 degree was the best option guides daylight deep into the room but with less uniformity.