| Keywords |
Daylight ; Photoelectric dimming control ; Sensitivity ; Shielding ; Energy savings |
| Abstract |
This study investigate the control performance of a photoelectric dimming control system to recommend better photosensor sensitivity. Computer simulations were performed for an office space with a double skin envelope system. Various daylight conditions were applied to the space. Standard three sky conditions by CIE was used. A photosensor with a full shielding condition was assumed to be positioned at the center of the ceiling. Three sensitivity conditions were applied to the photosensor. Overall, desktop was overshot when the photosensor had the least sensitiveness level to daylight. In general, the dimming amount controlled by most sensitive level was too less to provide target illuminance. In some cases, the least sensitiveness level achieved the target illumiance with good energy savings. The coefficient of determination for the desktop illuminance due to daylight and photosensor illuminance due to daylight ranged from 0.74 to 0.93. |