Application of an Anidolic System to Improve Daylighting in Educational Buildings

The suitable interaction of daylight is an essential issue to reduce the energy consumption in buildings and to improve luminous comfort conditions of occupants. The aim of this work focused on investigating the potential of anidolic systems to enhance the daylighting conditions in an educational building whilst providing comfort for the students. Previous research has demonstrated the effectiveness of these systems [1, 2, 3, 4, and 5]. The case study building is a computer classroom of an
more » ... lassroom of an elementary school located in the Mexico City Metropolitan Area (MCMA). During the first stage of this work, evaluation of the lighting conditions of the investigated space was carried out. Results indicated that natural light in the space was low and inadequate in most working stations. The physical and optical properties of the envelope components of the space were replicated in a 1:15 scaled physical model. The calibration process of the lighting conditions in the model showed similar conditions as in the actual building and then validated the procedure. Five different anidolic alternatives were implemented, investigated and evaluated in a scale physical model, located on the north facade of the case study space. These alternatives, assessed experimentally, showed a significant improvement of working plane illuminances and daylight factors, monitored under clear and overcast sky conditions relative to the reference model with a conventional facade. As a result, a significant improvement of the daylight autonomy can be expected and was confirmed with the implementation of computer simulation models. The most promising results were shown by an innovative system consisted of an anidolic arrangement integrated with a refractive panel system, that increased the lighting conditions in the space whilst improving visual comfort and overall performance. It is expected that the results of this work can be applied in other similar buildings aimed at providing suitable lighting conditions whilst reducing the energy consumption and the emission of greenhouse gases to the atmosphere, and to eventually promote sustainability in buildings.
doi:10.5075/epfl-cisbat2015-265-270 fatcat:jmc6tny5b5crbnjdsgjj5q33xa