Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

The indoor louver type concentrating daylighting system, which is one of the renewable energy systems, can reduce the consumption of lighting energy. But it has few research cases evaluating the lighting energy saving performance. In this study, the LED dimming control system was applied to analyze the indoor environment and lighting energy saving effect for 3 days during the fall. The visual environment performance was compared with KS average indoor illumination range of office and uniformity of BREEAM. The lighting energy saving rate was calculated to be 67% to 87% per hour and 52% to 61% per day, and it varies depending on the external illuminance and time. Afterwards, it will be possible to quantify changes due to changes in outdoor illuminance when increasing statistical data, as well as research on lighting energy saving performance according to the angle of slat and whether automatic control is applied.