What is it about?
This paper highlights the problems that are associated with daylight use in industrial facilities. In a case study of a multi-story textile factory, we report how to evaluate daylight (as part of integral light) in the production halls marked F and G. This study follows the article in the Buildings journal, where Hall E was evaluated (unilateral daylight). These two additional halls have large areas that are 54 × 54 m and are more than five meters high. The daylight is only on the side through the attached windows in envelope structures in the vertical position on the hall. In this paper, we want to present two case studies of these two production halls in a textile factory in the eastern part of Slovakia. These are halls that are illuminated by daylight from two sides through exterior peripheral walls that are against or next to each other. The results of the case studies can be applied in similar production halls illuminated by a “double-sided” (bilateral) daylight system. This means that they are illuminated by natural illumination through windows on two sides in a vertical position. Such a situation is typical for multi-storied industrial buildings. The proposed approximate calculation method for the daylight factor can be used to predict the daylight in similar spaces in other similar buildings.
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Why is it important?
When assessing building sustainability based on computational programs, the daylight element becomes just one of the sustainability assessment indicators. At the same time, the need for daylight is essential for sustainability and its emphasis should be highlighted in evaluation programs. Of course, it is not a simple matter to find a compromise between ecology, environment, economics, and energy requirements. However, this is the role for all of us in the future, because getting closer to sustainable development is our goal.
Perspectives
A common parameter for daylight saving is the DF factor (daylight factor) in many countries. The daylight level measurement is relatively complicated because the level of outdoor lighting may change during the day. Finding a suitable day when acceptable conditions are met is difficult. Although the criteria are met and the outdoor lighting is within the allowed range, it may change during the measurement, especially when there are a lot of control points. In our case study, we wanted to show how this task can be done. In the ordinary interior of the residential buildings, it is easier because the space is relatively small. In industrial buildings, the interiors are large in size. Sometimes the production halls are above and the upper daylight (skylights) can only be applied in the floor under the roof. On the lower floors, it is possible to modify the structures or use the light pipe. When using windows only (as is this case), there is a significant drop in the DF.
prof. Dušan Katunský
Technical University of Kosice
Read the Original
This page is a summary of: Daytime Lighting Assessment in Textile Factories Using Connected Windows in Slovakia: A Case Study, Sustainability, February 2018, MDPI AG,
DOI: 10.3390/su10030655.
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