Current Status

Daylight utilization
Ensuring an adequate amount of daylight and visual comfort in buildings, is strongly associated with the proper design of windows size, shape, type and location (above the level of the floor), as well as the appropriate design of rooms depth and proportions. To determine the solution of the most efficient use of daylight various sizes and geometries of windows have been analysed. The lighting condition has an impact on the activity of people occupying the room - speed, accuracy and effort are mainly influenced by the lighting condition in a room. In a wider range it has also a great influence on the health, well-being and life quality of the people who are working in the room. Therefore, it is important to create a visual comfort inside the room by providing suitable qualitative and quantitative characteristic of lighting. It should be emphasized that comfort depends on many parameters, but it is also very subjective. In work package 3 “Double criterion optimization of integrated Renewable Energy Systems (RES) and daylight utilization” visual comfort for combination of different sizes and geometry of windows, are analyzed based on indexes.

For the preliminary analysis three solutions were taken into account, for which the concept of the entire façade is presented in the following figure:

Different types of evaluated window geometriesDifferent types of evaluated window geometries

The numerical calculation has been done using “Daysim” software. Results have been received for the behaviour of shadow movement inside the room depended on the geometry of the window and for the light intensity distribution in the room. Evaluating the impact for visual comfort the calculations were executed for east and west orientation of the windows.

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