Daylight Performance-Based Design Model for Bio-adaptive Building Skin for Office Space of Administrative Buildings in Egypt
Wael, N., Zakria, W., Elkhatieb, M., Mahdy, M. (2025). Daylight Performance-Based Design Model for Bio-adaptive Building Skin for Office Space of Administrative Buildings in Egypt. EKB Journal Management System, 16(16), 1-1. doi: 10.1088/1755-1315/1530/1/012009
Nadeen Wael; Waleed Zakria; Mahmoud A. Elkhatieb; Mohamed Mahdy. "Daylight Performance-Based Design Model for Bio-adaptive Building Skin for Office Space of Administrative Buildings in Egypt". EKB Journal Management System, 16, 16, 2025, 1-1. doi: 10.1088/1755-1315/1530/1/012009
Wael, N., Zakria, W., Elkhatieb, M., Mahdy, M. (2025). 'Daylight Performance-Based Design Model for Bio-adaptive Building Skin for Office Space of Administrative Buildings in Egypt', EKB Journal Management System, 16(16), pp. 1-1. doi: 10.1088/1755-1315/1530/1/012009
Wael, N., Zakria, W., Elkhatieb, M., Mahdy, M. Daylight Performance-Based Design Model for Bio-adaptive Building Skin for Office Space of Administrative Buildings in Egypt. EKB Journal Management System, 2025; 16(16): 1-1. doi: 10.1088/1755-1315/1530/1/012009

Daylight Performance-Based Design Model for Bio-adaptive Building Skin for Office Space of Administrative Buildings in Egypt

The International Conference on Civil and Architecture Engineering
Volume 16, Issue 16, May 2025, Pages 1-1    PDF (360.49 K)
DOI: 10.1088/1755-1315/1530/1/012009
Authors
Nadeen Wael1; Waleed Zakria1; Mahmoud A. Elkhatieb2; Mohamed Mahdy2
1Researcher at the department of architectural engineering
2Lecturer at the department of architectural engineering - Military Technical College
Abstract
Daylight Discomfort Glare (DDG) limits the effectiveness of natural light in office spaces,
particularly in Cairo’s hot climate, where varying sun angles throughout the day impact
visual comfort. The research provides a parametric design tool that integrate building skin
designs based on user specified parameters, a daylighting simulation engine that assesses
daylighting performance using a single point-in-time method for each design variant, and
an optimization tool that helps identify the most optimal design solution based on
maximizing daylighting performance while reducing (DDG) for southern orientation in
Egyptian office buildings. Through seasonally adaptive design, this study demonstrates how
effectively biomimetic building skin can enhance indoor visual comfort. Across four specific
test points, the proposed system reduced glare by up to 31% while maintaining indoor
illuminance levels within the recommended range of 500–2000 lux compared to an
unshaded base case. For June, a 90% perforation ratio with a 20 cm shading extrusion
proved most effective, offering a balanced approach to daylight access and glare mitigation,
especially in the morning and afternoon, while medium ratios performed better at noon. In
December, perforation ratios of 50–60% combined with a 30 cm extrusion effectively
blocked low-angle sunlight and reduced glare.
Keywords
Bio-adaptive skin; daylighting performance; parametric design; building envelope design
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