Abstract This study examines the system performances of daylight dimming controls under various photosensor conditions in an office space with three lightshelf configurations to propose operation guidelines for the control systems. Using Lightscape, computer simulations were conducted for photosensors positioned at three points with three shielding configurations, and a series of computations procedures were employed. The results indicated that a photosensor should be at least shielded partially and positioned at the center of the ceiling or any point beyond the center to the back wall to ensure optimum system performance of the dimming controls under clear and partly cloudy skies. The dimming control system affected by the photosensor positioned 2 m from the window failed to provide the target illuminance under all the photosensor shielding and sky conditions. No-shielding conditions were inappropriate for most of the cases, because over dimming occurred owing to the excessive light detection at the photosensors. The coefficient of determination between the desktop and the photosensor illuminance due to the daylight varied from 0.8568 to 0.9965 for all cases. The maximum lighting energy saving were 77.5% under a partial shielding condition for a clear sky. The lighting energy savings were not significantly different for the photosensor positions at 5 m and 8 m under clear and partly cloudy skies. Under overcast sky conditions, the dimming control systems operating with partial and full shielding provided the target illuminance but achieved less than 25% energy saving.

中文翻译：

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具有灯架配置的办公室日光调光控制系统的操作指南

摘要 本研究在具有三种灯架配置的办公空间中检查各种光电传感器条件下日光调光控制的系统性能，以提出控制系统的操作指南。使用 Lightscape，对位于三个点的具有三种屏蔽配置的光电传感器进行计算机模拟，并采用了一系列计算程序。结果表明，光电传感器应至少部分屏蔽并放置在天花板的中心或中心以外到后墙的任何点，以确保在晴朗和部分多云的天空下调光控制的最佳系统性能。受距离窗口 2 m 的光电传感器影响的调光控制系统无法在所有光电传感器屏蔽和天空条件下提供目标照度。在大多数情况下，无屏蔽条件是不合适的，因为由于光电传感器处的过度光检测而导致过度调光。在所有情况下，由于日光导致的桌面和光电传感器照度之间的确定系数从 0.8568 到 0.9965 不等。晴天部分遮蔽条件下，最大照明节能77.5%。在晴朗和部分多云的天空下，5 m 和 8 m 处的光电传感器位置的照明节能没有显着差异。在阴天条件下，