1
Assistant Professor of Architecture; Faculty of Arts and Architecture
2
Graduated with a master’s degree in Architecture and Energy, Rassam Institute of Higher Education, Karaj, Iran
10.61186/jgeri.2025.2063402.1058
Abstract
This study explores the optimization of light shelf systems to enhance daylight performance and reduce energy consumption in office buildings located in hot and dry climates, with a focus on Isfahan. Given the region’s high solar radiation and the critical role of buildings in energy usage, the research employs a hybrid methodology that integrates parametric simulation with multi-objective optimization. The modeling was performed using Rhinoceros and Grasshopper, while daylight analysis utilized the Honeybee plugin with Radiance, and energy simulation relied on EnergyPlus. Findings indicate that the optimal light shelf configuration—an 85 cm external depth, a 28° tilt angle, and a 0.9 reflectance—can reduce annual Energy Use Intensity (EUI) by up to 5.8% and improve Spatial Useful Daylight Illuminance (sUDI) by 53%. Additionally, glare was reduced by 70% during midday hours. These results highlight the effectiveness of integrating passive daylighting strategies in sustainable architectural design for hot and arid climates.
Keshtkar-Ghalati,A. and Keyvanpanahi,K. (2025). Multi-Objective Optimization of Light Shelf Systems for Office Buildings in Hot and Dry Climates: A Case Study of Isfahan. (e728570). Journal of Green Energy Research and Innovation, (), e728570 doi: 10.61186/jgeri.2025.2063402.1058
MLA
Keshtkar-Ghalati,A. , and Keyvanpanahi,K. . "Multi-Objective Optimization of Light Shelf Systems for Office Buildings in Hot and Dry Climates: A Case Study of Isfahan" .e728570 , Journal of Green Energy Research and Innovation, , , 2025, e728570. doi: 10.61186/jgeri.2025.2063402.1058
HARVARD
Keshtkar-Ghalati A., Keyvanpanahi K. (2025). 'Multi-Objective Optimization of Light Shelf Systems for Office Buildings in Hot and Dry Climates: A Case Study of Isfahan', Journal of Green Energy Research and Innovation, (), e728570. doi: 10.61186/jgeri.2025.2063402.1058
CHICAGO
A. Keshtkar-Ghalati and K. Keyvanpanahi, "Multi-Objective Optimization of Light Shelf Systems for Office Buildings in Hot and Dry Climates: A Case Study of Isfahan," Journal of Green Energy Research and Innovation, (2025): e728570, doi: 10.61186/jgeri.2025.2063402.1058
VANCOUVER
Keshtkar-Ghalati A., Keyvanpanahi K. Multi-Objective Optimization of Light Shelf Systems for Office Buildings in Hot and Dry Climates: A Case Study of Isfahan. JGERI, 2025; (): e728570. doi: 10.61186/jgeri.2025.2063402.1058
