Outdoor thermal comfort in a hot urban climate: Analysing the impact of creating wind passageways in Al-Moski, Egypt using ENVI-met



Ayyad, Y and Sharples, S ORCID: 0000-0002-6309-9672
(2017) Outdoor thermal comfort in a hot urban climate: Analysing the impact of creating wind passageways in Al-Moski, Egypt using ENVI-met. In: 33rd International Conference on Passive and Low Energy Architecture, 2017-7-3 - 2017-7-5, Edinburgh.

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Abstract

Outdoor thermal comfort for pedestrians is difficult to achieve in high density, high population cities in hot climates, such as Cairo in Egypt. This study focussed on the outdoor thermal comfort of urban spaces in the Al-Moski district of Cairo and tested the effectiveness of creating new wind passageways at pedestrian level by selectively removing some of the buildings that encompass the Al-Moski area. The computational fluid dynamics (CFD) modelling software ENVI-met was used to create part of the existing Al-Moski urban form. Then, by extracting data from the CFD modelling, such as air temperature, wind speed, relative humidity and mean radiant temperature, the study was able to calculate the human thermal comfort index physiological equivalent temperature (PET). The urban form of Al-Moski was then changed in a systematic way by removing specific buildings in the ENVI-met model. The choice of building to remove was based on prevailing wind directions to see if accelerated flows at ground level through the newly created passageways could improve PET values. In addition, the benefit of adding areas of trees was also examined. The outcome of the analysis showed how a change in conditions, whether in the geometrical formation of the urban space or the addition of vegetation, could significantly affect the resulting PET values.

Item Type: Conference or Workshop Item (Unspecified)
Depositing User: Symplectic Admin
Date Deposited: 26 Jul 2017 13:37
Last Modified: 19 Jan 2023 06:58
URI: https://livrepository.liverpool.ac.uk/id/eprint/3008642