Dagsljusbelysning i ett radhus

Sammanfattning: The purpose of this thesis was to lead daylight in to a hallway in a terraced house in Gunnesbo outside of Lund, and to find out which method will give the best lighting results. It is known that daylight have a positive effect on health and wellbeing; it controls the circadian rhythm, increase performance and reduce the risk of suffering of such as depression and type 2 diabetes. The light that comes directly from the outside contains light from all wavelengths and cannot be replaced with artificial light to achieve the same health effects. The methods that have been tested to lead daylight into the terraced house in Gunnesbo were to install a window in the front door, remove the wall between the kitchen and the hallway or installing a light shaft. Different locations of the possible light shaft have also been tested. A light shaft is a square tube with inner walls of high reflecting material which leads the light trough a diffuse separator which spreads the light into the room. The part of the shaft which is placed on the outside of the roof is an inverted cone with surfaces that reflect light at a 90 degree angle and is protected by a glass cupola. The various placements of the shafts; above the stairs in the upper hallway, next to the stairs and beneath the stairs, were compared to an installation of a window in the front door in an actual model built of foam board at a scale of 1:6. Removal of the wall to the kitchen was compared with a front door window by using simulations in Autodesk Ecotect Analysis with Radiance. After analyzing all the measurements of the luminance and lighting simulations, the conclusion is that the most optimal solution for the terraced house in Gunnesbo is a light shaft above the stairs in combination with a window in the front door.