Urban cooling : which façade orientation has the most impact on a microclimate?

Taleghani, M, Swan, W ORCID: https://orcid.org/0000-0001-8780-6557, Johansson, E and Ji, Y ORCID: https://orcid.org/0000-0003-3003-5071 2021, 'Urban cooling : which façade orientation has the most impact on a microclimate?' , Sustainable Cities and Society, 64 , p. 102547.

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Abstract

Deploying solar reflective materials on urban surfaces is known as an effective heat mitigation strategy. Several studies have shown their cooling impacts; however, most of them have focused on rooftops rather than facades. The novelty of this paper is related to exploring the impact of each façade orientation on the corresponding microclimate and energy balance. High albedo materials were implemented on facades with different orientations to explore the potential of each façade. Computer simulations were employed to calculate the insolation of different façades, ground surface temperature, and surface energy balances. The simulations are done for the longest day of the year (21st of June) to have the maximum solar radiation on all facades. The results showed that east-west canyons receive 6 h more direct sun than north-south canyons. This proved that eastern and western facades have the most impact on the microclimate. Cooling east and west facades led to the maximum net radiation reductions for the ground surface. Furthermore, north and south facades had negligible contributions to pedestrian thermal comfort. By understanding the role of each façade, designers and policy makers could deploy cooling materials more effectively on building surfaces.

Item Type: Article
Schools: Schools > School of the Built Environment > Centre for Urban Processes, Resilient Infrastructures & Sustainable Environments
Journal or Publication Title: Sustainable Cities and Society
Publisher: Elsevier
ISSN: 2210-6707
Related URLs:
Depositing User: Dr Yingchun Ji
Date Deposited: 02 Nov 2020 14:47
Last Modified: 02 Nov 2020 14:47
URI: http://usir.salford.ac.uk/id/eprint/58656

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