| Keywords |
Intelligent Automated Roller Shade ; Profile Angle ; Daylight control ; Clearness Index ; Daylight Responsive Dimming System ; Energy Savings |
| Abstract |
This study aims to analyze a illuminance level and lighting energy savings by intelligent automatic roller shade with daylight responsive dimming systems. It is important to precise control for automated roller shade height that prevents the inflow of direct sunlight from exceeding the preset control depth, depending on the time and sky conditions, independent of an occupant's operation. Shade height will be automatically controlled depending on the height calculated, using a profile angle for clear skies and partly cloudy skies, and having the shades fully up for overcast skies. The result of field test using the half-scale test-bed, in terms of the work-plane illuminance distribution, illuminance increased by up to 42-83% when intelligent roller shade was installed, compared to manual roller shade. When intelligent automated roller shade was installed, lighting energy was reduced by 53% in average, compared to manually operated roller shade. In office buildings with the curtain wall, therefore, the automated roller shade is absolutely essential to save energy. |