Journal of Renewable and New Energy

Optimization of openings in residential buildings for using daylight and ventilation (Case Study: Omid Residential Complex, Tehran)

Articles in Press

Document Type : Original Article

Authors

Nima Takhti 1
Seyed-Abbas Yazdanfar 1
Saeid Norouzian-Maleki 2

1 Department of Architecture, School of Architecture and Environmental Design, Iran University of Science & Technology, Tehran, Iran

2 Department of Landscape Architecture, Faculty of Architecture and Urban Planning, Shahid Beheshti University, Tehran, Iran

Abstract
According to the official statistics of the International Energy Agency, about forty percent of the world’s energy is consumed by buildings. Considering the energy crisis and the destructive effects on the environment and humans, finding new solutions and ideas in energy consumption is the duty of today’s architects. To save energy for the proper use of useful daylight and ventilation, the implementation of passive solutions to regulate the indoor environment and on the other hand daylight plays a significant role in ensuring the health of residents. Therefore, by examining the available resources in the field of energy consumption reduction and extracting the indicators and systems used in them, the simulation method with the Ladybug tools v1.6 plugin on the Grasshopper software platform was selected. By optimizing the ratio of window to wall area (WWR), the results of two factors of useful day lighting and building ventilation were improved. 100 generations were produced in the optimization process. The optimal solution has been produced among the generations that the optimal ratio of WWR for useful daylight is set at 40% on the north face and 20% on the south face, and 15% on the north face and 40% on the south face for the ventilation and energy sector of the building.

Keywords

Daylight؛ Optimization of openings؛ Useful lighting؛ Residential buildings&rsquo
ventilation systems

Subjects

Journal of Renewable and New Energy

Articles in Press, Accepted Manuscript
Available Online from 06 February 2026

  • Receive Date 19 April 2025
  • Revise Date 14 November 2025
  • Accept Date 10 December 2025

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