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Achieving Effective Thermal Performance of Street Canyons in Various Climatic Zones

Author

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  • Mohamed Hssan Hassan Abdelhafez

    (Department of Architectural Engineering, College of Engineering, University of Hail, Hail 2240, Saudi Arabia
    Department of Architectural Engineering, Faculty of Engineering, Aswan University, Aswan 81542, Egypt)

  • Fatmaelzhraa Altaf

    (Department of Architectural Engineering, Faculty of Engineering, Aswan University, Aswan 81542, Egypt)

  • Mohammad Alshenaifi

    (Department of Architectural Engineering, College of Engineering, University of Hail, Hail 2240, Saudi Arabia)

  • Omar Hamdy

    (Department of Architectural Engineering, Faculty of Engineering, Aswan University, Aswan 81542, Egypt)

  • Ayman Ragab

    (Department of Architectural Engineering, Faculty of Engineering, Aswan University, Aswan 81542, Egypt)

Abstract

Outdoor thermal comfort is one of the essential characteristics of effective urban planning. The aspect ratio and orientation of the street canyon influence the thermal performance. Regulations standardize construction rules without accounting for regional climatic variations or the effect of these limits on pedestrian thermal comfort. The purpose of this paper is to provide an understanding of the effects of aspect ratios and street canyon orientations on thermal comfort in Alexandria, representing the North Coast Region of Egypt, and Aswan, representing the Southern Egypt Region, using ENVI-met and RayMan software for various aspect ratios and street canyon orientations scenarios. As a result, the aspect ratio (AR = 2.5) gives the best thermal conditions in all the scenarios evaluated in both cities, whereas the aspect ratio (AR = 1) provides the worst. Despite having the highest PET value among the investigated scenarios, the Northeast-Southwest street canyon in Aswan City has the least uncomfortable thermal hours. The North-South street canyon in Alexandria City has the best thermal performance, followed by the Northwest-Southeast street canyon. Finally, it was shown that the aspect ratio and the orientation of the street canyons in the North Coast and Southern Egypt regions can support pedestrian thermal comfort.

Suggested Citation

  • Mohamed Hssan Hassan Abdelhafez & Fatmaelzhraa Altaf & Mohammad Alshenaifi & Omar Hamdy & Ayman Ragab, 2022. "Achieving Effective Thermal Performance of Street Canyons in Various Climatic Zones," Sustainability, MDPI, vol. 14(17), pages 1-21, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:17:p:10780-:d:901260
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    References listed on IDEAS

    as
    1. Ayman Ragab & Ahmed Abdelrady, 2020. "Impact of Green Roofs on Energy Demand for Cooling in Egyptian Buildings," Sustainability, MDPI, vol. 12(14), pages 1-13, July.
    2. Yasser Ibrahim & Tristan Kershaw & Paul Shepherd & David Coley, 2021. "On the Optimisation of Urban form Design, Energy Consumption and Outdoor Thermal Comfort Using a Parametric Workflow in a Hot Arid Zone," Energies, MDPI, vol. 14(13), pages 1-22, July.
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    Cited by:

    1. Komi Bernard Bedra & Bohong Zheng & Jiayu Li & Xi Luo, 2023. "A Parametric-Simulation Method to Study the Interconnections between Urban-Street-Morphology Indicators and Their Effects on Pedestrian Thermal Comfort in Tropical Summer," Sustainability, MDPI, vol. 15(11), pages 1-23, May.

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