Improving the outdoor thermal sensation helps improving the quality of outdoor spaces for pedestrians and users, consequently contributes to making cities more sustainable. Space geometry and space greenery are acknowledged for their impact on outdoor thermal comfort. However, limited experimental studies examine both strategies simultaneously. Two spaces at university campus at El-Giza, Egypt were selected as a case study. Space 1 had a favorable geometric configuration as it had 75% of its perimeter enclosed by 6 floors building and oriented towards the prevailing wind, however, it was completely paved. Space 2 had more than 60% of its surface covered by greenery with 50% of its perimeter enclosed by the same building and its western and southern sides were opened. The relevant climatic parameters were measured and surveys were distributed among 290 students over six days in spring and four days in fall during typical educational day hours in the two spaces. Throughout all measurements taken, Space 1 enjoyed cooler air temperature, Mean Radiant Temperature (MRT) and Physiological Equivalent Temperature (PET). Students with “Neutral” thermal conditions in Space 1 were twice the number of their peers in Space 2. For all the responses of the students, Thermal Sensation Vote (TSV) was found to have strong relation with PET, MRT and surface temperature. The results objectively (PET) and subjectively (self-reported survey) imply that variations in space geometry manipulation and space greenery can be associated with significant climatic and sensational variations for the students and how they use the outdoors.

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The Influence of Outdoor Space Geometry and Greenery Configuration on Students’ Thermal Perception During Moderate Seasons in an Arid Climate

  • Hadeer Emad Sobhy,
  • Hatem Mahmoud,
  • Omar Mohamed Galal

摘要

Improving the outdoor thermal sensation helps improving the quality of outdoor spaces for pedestrians and users, consequently contributes to making cities more sustainable. Space geometry and space greenery are acknowledged for their impact on outdoor thermal comfort. However, limited experimental studies examine both strategies simultaneously. Two spaces at university campus at El-Giza, Egypt were selected as a case study. Space 1 had a favorable geometric configuration as it had 75% of its perimeter enclosed by 6 floors building and oriented towards the prevailing wind, however, it was completely paved. Space 2 had more than 60% of its surface covered by greenery with 50% of its perimeter enclosed by the same building and its western and southern sides were opened. The relevant climatic parameters were measured and surveys were distributed among 290 students over six days in spring and four days in fall during typical educational day hours in the two spaces. Throughout all measurements taken, Space 1 enjoyed cooler air temperature, Mean Radiant Temperature (MRT) and Physiological Equivalent Temperature (PET). Students with “Neutral” thermal conditions in Space 1 were twice the number of their peers in Space 2. For all the responses of the students, Thermal Sensation Vote (TSV) was found to have strong relation with PET, MRT and surface temperature. The results objectively (PET) and subjectively (self-reported survey) imply that variations in space geometry manipulation and space greenery can be associated with significant climatic and sensational variations for the students and how they use the outdoors.