Corresponding Author

Amr Sayed Hassan Abdallah (Ph.D)

Subject Area

Architectural Engineering

Article Type

Original Study


This paper aims to propose a new planning approach that achieves residents' thermal comfort inside the courtyards of residential complexes based on the improvement of the urban canyon ratio in the current residential complex in New Assiut city as a base case, including their role in boosting social interaction and improving residents’ Outdoor thermal comfort (OTC) and courtyard air quality. This new planning proposal is based on the planning of old Arab cities that encourages liveability, walkability, social interaction, and sustainability. Then, improvement of urban canyon ratios for the new planning proposal was simulated and optimized using ENVI-met 5. Eight cases for courtyards urban canyons with different aspect ratios, (H/W) =0.8,1,1.2, 1.25, 1.5 &1.825, were simulated to determine the optimal case for each building height (15 m, 12 m), followed by the integration of different scenarios (trees, shading, water elements) for the optimization model. Values of Physiological Equivalent Temperature (PET), Mean Radiant Temperature (Tmrt), and CO2 concentration were compared. The results concluded that buildings with deep canyons (W=8) and building heights equal to 12 and 15, with aspect ratios 1.825 and 1.5, achieved the optimal reduction of air temperature and PET. The results of this study help planners and architects integrate the optimum canyon ratios in planning Egyptian cities in the early design stage, as a new planning approach for activating the neighborhood feature of planning residential areas and its direct impact on the social/administrative aspects.


New planning; Outdoor Thermal Comfort; Deep canyon; Residential complex

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.