Comparison of Daylight Levels Using Simulation Calculation Tools

The focus of this article is the evaluation of light comfort in a specific attic space. Windows located in the perimeter wall as well as the roof contribute to ensuring this comfort. The objective of this study is to assess and compare the impact of various skylight configurations on the amount of daylight penetration in the designated area, with the aim of optimizing its utilization for human occupancy. Furthermore, indoor air temperature is influenced by the presence of daylight. During winter, thermal insulation properties adequately mitigate the situation as the packaging structures possess sufficient thermal resistance. However, in summer, inadequate heat storage capacity of these structures leads to overheating of the indoor air. This research investigates the relationship between the size of roof windows and the resulting microclimate within the attic space. Four different window size variants are analyzed and compared. The goal is to determine the optimal window size that effectively regulates the microclimate and ensures a comfortable environment in the attic area. The scenario without roof windows presents a viable option, particularly when lighting is solely provided through windows in the perimeter wall, as opposed to the roof. This configuration minimizes overheating but compromises daylight availability. To maximize daylight intake, the skylights should be positioned at the top of the roof. The study presents a graphical comparison of differences in daylight calculations obtained from different simulation tools. The analysis was conducted without considering window shading. The results highlight disparities between the outcomes produced by various simulation tools, accompanied by their justification.