Abstract
Lighting dimming systems are used for energy reduction and user convenience in various buildings. However, after installing the dimming system, it is difficult to satisfy the required illuminance of the indoor workplane due to the adjustment of the shading device, the inflow of surrounding lighting system, and daylight. Therefore, this study identified the variations of workplane illuminances by installing and monitoring photosensors in various locations to provide an appropriate luminous environment to users. This study analyzed the energy savings of lighting dimming control systems with the indoor reflective louver system and found that the average energy savings was 29.77%, when the sky condition was partly cloudy. Linear regression analysis was performed using an order least square to determine the relationship with the average illuminance of the working surface of each photosensor. As a result, it was confirmed that the R-squared value for indoor reflective louver system was 0.939 for lighting fixture photosensors, 0.908 for three way photosensors, 0.908 for two way photosensors and 0.779 for wall photosensors.
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