| Keywords |
Dimming control ; Dimming level ; Controller sensitivity ; Lighting energy |
| Abstract |
This study investigates the influence of various algorithm on system performance of a daylight dimming control. Computer simulations were performed for a small office space under various daylight conditions. A combination of shading device was applied to the space under three CIE sky conditions to examine the impact of daylight and dimmed electric light on a fully-shielded photosensor installed on the ceiling. When the sensitivity, which was a ratio of variation in dimmed level to variation of signal at a photosensor, was 0.25 the most effective control performance occurred to the system. Less or more sensitivity than 0.25 led to a failure providing excessive or insufficient desktop illuminance. Providing good target illuminance and energy savings the dimming control was effective under clear sky conditions. Reasonable lighting energy saving was achieved when the sensitivity was set up. |