PREDICTION OF DAYLIGHTING AVAIBILITY USING SUBJECTIVE PERCEPTION AND COMPUTER SIMULATION

• Main Author: DIAN ASRI (NIM : 13311026) - MARDLIYAHTUR ROHMAH (NIM : 13311046); , ANINDYA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19892
• Institution: Institut Teknologi Bandung

Daylighting is an efficient strategy to reduce energy consumption in buildings. To indicate daylight availability in interior spaces, a number of metrics have been proposed and applied in practice. Most standards and codes recommend the use of daylight factor due to its simplicity; however, it is insensitive (static) with regard to façade orientations and local climates. As an alternative, the use of 'dynamic' <br /> <br /> <br /> or climate-based daylight metrics has been recently proposed. To validate the concept of dynamic daylight metrics with the occupants perception, Reinhart et al. <br /> <br /> <br /> has conducted a series of experiment to predict the daylight boundary lines and areas in interior spaces, based on a number of students assessments and computer <br /> <br /> <br /> simulations. However, almost the entire experiments were performed in high lattitude regions. In this research, the concept of predicting the daylight areas was tested in five lecture rooms in Bandung, Indonesia, which is located in the tropical region. On average, 30 engineering physics students were recruited to assess each room by drawing the daylight boundary lines. Modelling and simulations were conducted in Radiance and Daysim to predict the daylight factor, daylight autonomy, and useful daylight illuminance at each room. Comparisons were done to observe whether there were correlation between the students assessments and the <br /> <br /> <br /> simulation results. Results show that the mean daylight boundary lines drawn by the students are mostly in accordance with the line of 1/3 depth of the room, which is mentioned as reference line for daylight evaluation in Indonesian national standard. The daylight areas according to the students in most of the rooms have the nearest values to those calculated with daylight factor of 0.6-0.8%, daylight autonomy of 50% (150 lx), and useful daylight illuminace of 50% (100-2000 lx).