Rumsutformningens inverkan på dagsljuset i kontorslokaler

Sammanfattning: Public buildings are considered to be the most power consuming buildings in the world. To reduce power consumption earlier studies propose greater use of natural daylight to illuminate surroundings, hallways and areas where to preform common work tasks and where artificial lighting is only used for the actual work space and places where higher light levels are required. In office buildings with available daylight, it has been shown that people have a greater general well-being, improved health, reduced absenteeism and increased productivity. The purpose of this study is to investigate how different room configurations can increase the amount of daylight in offices. The essay is based on an experimental study in the form of a questionnaire in which participants have evaluated and documented their perceptions of the visual properties regarding daylight. The evaluation has been carried out with scale models of different room configurations, but with the same window size and window positions. The results show that a room configuration with embrasures provides the most effective daylight harvesting. Embrasures contribute with maximum visibility, brightness and provide maximum light scattering. Room configurations with rounded corners have proven to give the most even light ratio between the light and dark areas of a room where the light is also spread most evenly along the walls. According to an evaluation of the visual properties of daylight, a room with rounded corners is perceived to be the most comfortable room and provide the softest and gentlest light impression. The study is limited to evaluate the amount of daylight and the visual properties of daylight in large office spaces designed based on energy-efficient passive houses with thick facade walls.