Explaining the Optimization of Light Shelf Specifications in Semi-arid Climate Schools with Visual Comfort Approach and Energy Efficiency
Romina Khalilzadeh aghdami
1
(
Department of Art and Architecture, West Tehran Branch, Islamic Azad University, Tehran, Iran
)
Seyed Majid Mofidi Shemirani
2
(
Assistant Professor, Department of Architecture, Faculty of Architecture and urban, Iran University of Science and Technology, Tehran, Iran
)
Mansoureh Tahbaz
3
(
Associate Professor, Department of Architecture, Shahid Beheshti University, Tehran, Iran
)
Keywords: Daylight, Educational Space, Energy Efficiency, Visual Comfort, Glare Disturbing Comfort,
Abstract :
The present study investigates the effect of optimizing light shelf specifications on improving light performance and reducing energy consumption in classrooms. In order to achieve the goal, Shahid Mahdavi Preschool in Tehran was selected as a research sample due to its features such as a light shelf, Trombe wall with light vents, ornamental design on the ceiling and diagonal atrium. Light measurement was done with Light meter in two classes as a reference and simulation scenario and the results analyzed with Climate Studio. The analysis process includes19 different configurations for internal and external optical rack structures, which were evaluated in four stages. The independent variables were changed in each step and the results were compared with the basic model without light shelf. But in the final stage, the optimal model evaluated with the reference scenario and the base model. The LSPV4 model was selected as the optimal model. The results of the annual glare analysis show a decrease in this index with a growth rate of-62.58 % in the reference scenario and-60.49 % in the base model. Daylight uniformity values in the optimal model in the southeast and southwest classes have increased by 47.06 and60.98% respectively, and compared to the base model by59.57 and 17.86%, respectively.Therefore, based on simulation results, optimizing light shelf specifications in Tehran classroom in line with achieving visual comfort by providing optimal daylight and reducing glare, as well as energy efficiency by reducing energy consumption and electricity production required for lighting when necessary has been realized
