An Economic analysis of the Luminaire-Level control of LED lighting in small office

Abstract

The objective of this study is to perform an economic analysis of the luminaire-level control of LED lighting in a small office. For this, energy consumption and illuminance were measured for one year in a space where the luminaire-level controller of LED lighting was installed, and the evaluation of the integrated energy performance of dimming control LED was performed through energy analysis simulation. The annual energy saving cost was calculated based on the annual energy consumption, and the economic analysis was performed through the payback period method by comparing the energy consumption with the initial cost. As a result of the simulation to which the measured data was applied, the annual energy cost was reduced by 26.8-34.2% according to the Window-to-Wall Ratio (WWR) of dimming control LED compared to fluorescent lamps. In the case of 100% WWR and south-facing orientation, the payback period of dimming control LED was 2.41 years compared to the fluorescent lamp, which was the smallest, while in the case of 40% WWR and east-facing orientation, the payback period was 3.89 years, which was the largest. In addition, when occupancy sensor control is considered, it was found that the payback period can be further reduced.