Daylight and luminaire control in a perimeter zone using an automated Venetian blind

摘要

Commercial buildings with large exposed glazed facades require solar shading devices in order to protect occupants from uncomfortable direct glare. Automated window blinds can be used to reduce direct glare, while regulating the transmittance of daylight or solar gains. At the same time, they may be integrated with the building automation system to provide load management by limiting solar gains and by adjusting electric lighting levels based on the available daylight. The purpose of this study is to model the light transmittance of a win-dow-venetian blind system, and to simulate and measure the controlled system performance regarding day-lighting efficiency, maximization of outside view and the reduction in electric lighting power consumption. This paper presents the illuminance measurements with the controlled Venetian blind on a test facade, as well as the associated lighting energy savings.