Peng, Zhikai and Debnath, Ramit and Bardhan, Ronita and Steemers, Koen Machine learning-based evaluation of dynamic thermal-tempering performance and thermal diversity for 107 Cambridge courtyards. Sustainable Cities and Society Volume 88, January 2023, 104275, 88.

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Abstract

The dynamic thermal conditions profoundly impact on the quality of physical, cultural, and social experiences in courtyard spaces. This research aims to identify the microclimatic dissimilarities between courtyards in terms of tempering seasonal–diurnal thermal extremes and enriching ground-level thermal textures. The methodology included field measurements in summer-2021 and winter-2022 in Cambridge, UK; microclimatic simulations of 107 courtyards in ENVI-met and model validations; and machine learning-driven clustering using Super Organising Maps (SuperSOM). The results indicate that the diurnal thermal range of the spatial-UTCI mean in summer ( ) is double that in winter ( ); meanwhile the maximum spatial-UTCI deviation is three times as significant ( at 7:00 BST versus at 12:00 GMT). SuperSOM analysis was performed using K-means and hierarchical agglomerative clustering to partition all courtyards into seven subclusters on its graph-lattice structure. Clusters Km_I, Hac_I, and Hac_IV feature a positive synergy between the thermal-tempering and thermal-enriching potentials. In contrast, the other four clusters exhibit conflicting scenarios during the day and night across the two seasons analysed. These data-driven outcomes enabled us to optimise spatial and landscape strategies for designing and retrofitting courtyard microclimates, contributing to the current discussions on climate-responsive and sensation-inclusive design in historical urban contexts.

Item Type:	Article
Uncontrolled Keywords:	Courtyard; Microclimate; Thermal tempering; Thermal diversity; Machine learning; Historical urban contexts;
Subjects:	English > Climate Control
Depositing User:	Susanna Carlsten
Date Deposited:	04 May 2023 07:52
Last Modified:	04 May 2023 07:52
URI:	http://eprints.sparaochbevara.se/id/eprint/1319

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