Building daylight control on work-Plane illuminance and discomfort glare
Abstract
This study evaluated the effectiveness of an automated external Venetian blind (EVB) shading system in optimizing daylight conditions and enhancing visual comfort. The system utilizes external real-time High Dynamic Range (HDR) imaging and computational simulations to dynamically control slat angles based on monitored outdoor luminance. This approach avoids the privacy concerns associated with interior-facing cameras. Experiments conducted in autumn under clear and partly cloudy skies demonstrated the system's robustness. The system effectively maintained work-plane illuminance (WPI) within the optimal range of 5002000 lux for 88% of working time under clear conditions and 83% under partly cloudy conditions. Concurrently, discomfort glare was consistently mitigated, keeping the Daylight Glare Probability (DGP) below the 0.35 threshold in all scenarios. The findings highlight the potential of advanced automated shading to effectively manage daylight, ensure visual comfort, and reduce energy consumption by preventing excessive solar heat gain.
Keywords
Daylight, Discomfort Glare, Automatic Control, Visual Comfort