A Survey Study of Occupants' Visual Satisfaction on an Automated Venetian Blind based on Sky Luminance Monitoring and Lighting Simulation

摘要

Smart daylighting control can contribute to energy savings in artificial lighting, space cooling and heating loads in buildings. Although various shading automation systems have been proposed to foster the utilization of daylight in buildings, the performance of which is limited by a number of factors, including insufficient glare protection, disturbing movement of slats, privacy issues, and difficulty in installation and commissioning. This paper investigates the performance of a novel decentralized shading system based on real-time sky luminance monitoring and on-board lighting simulation, in the perspective of occupants' visual satisfaction. A subjective study was conducted with 34 young subjects in a daylighting testbed during the winter when the solar elevation angle was low and occupants were subject to discomfort glare from the sun during the period. According to the survey results, the automated shading system was able to reach 89% satisfaction from the occupants regarding daylight provision, 87% satisfaction on the discomfort glare protection, and 86% satisfaction of the occupants on the quietness of shading movements.