ENERGY EFFICIENT LIGHTING DESIGN - A CASE STUDY OF JIGME NAMGYEL ENGINEERING COLLEGE

This study focuses on efficient lighting design in Jigme Namgyel Engineering College (JNEC), under the Royal University of Bhutan (RUB). To carry out the detailed study and review of the existing lighting scheme, Relux simulation software was used and it is one of the high-performance software to simulate electric and daylight for illumination design and study. The study was based on the existing lighting scheme and a comparative study employing different luminaires (fluorescent lamp and LED) was performed succeeded by designing an efficient illumination lighting scheme. Further to increase energy saving during the daytime, daylight has been integrated with all the lighting schemes studied. The simulation result exhibits that the average illuminance for the existing lighting scheme is 161lx which does not meet the standard lx level for given infrastructures. Two new lighting schemes using fluorescent lamps and LED lamps were suggested following the standard lx level recommended at the workplace. The comparative life cycle cost analysis of the proposed lighting scheme resulted in 59.9% energy saving potential and accounted for a payback period of 2years when employing LED lamps instead of existing illumination fixtures.