PREDICTION OF DAYLIGHT AVAILABILITY IN LARGE HALLS WITH COMPLEX FACADES USING SUBJECTIVE PERCEPTION AND COMPUTER SIMULATION

• Main Author: Mukarromah, Nurul
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/44969
• Institution: Institut Teknologi Bandung

The use of daylighting can minimize energy consumption in a building. However, people’s perception to daylight can be varied for a space that has multiple facades from several directions. Therefore, a method should be conducted to predict the correlation between standard and subjective perception of building occupants. Forty engineering physics bachelor students were asked to assess two daylit spaces in Bandung Institute of Technology, Indonesia, that has side-lighting on four different sides of the wall. Each student drew boundary lines between daylit and non-daylit area in the given spaces. The area where 75% boundary lines overlap is categorized as fully daylit while only 25% lines overlap is called partially daylit. The results were compared to contour lines obtained from daylight autonomy (DA), daylight factor (DF), and useful daylight illuminance (UDI) simulation in DAYSIM. It was found that DA in East Hall with target illuminance of 150 lux and West Hall with target illuminance of 300 lux are located between the percentage area of 1st quartile and 3rd quartile. Therefore, DA is more suitable metrics for predicting the availability of natural light in the large hall. However, DF can still be used since its percentage is close to daylit area in West Hall. From the different target illuminance in both halls, it can be seen that human can adapt to the illuminance level in a room.