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Article: Investigating the impact of urban microclimate on building thermal performance: A case study of dense urban areas in Hong Kong

TitleInvestigating the impact of urban microclimate on building thermal performance: A case study of dense urban areas in Hong Kong
Authors
KeywordsClimate change
Extreme heat events
Indoor thermal comfort
Urban building energy modeling
Urban microclimate
Issue Date1-Jul-2023
PublisherElsevier
Citation
Sustainable Cities and Society, 2023, v. 94 How to Cite?
Abstract

Urban microclimate conditions could be an important factor influencing building thermal performance. However, most studies on urban building energy modeling (UBEM) use the typical meteorological year (TMY), often developed from observations of exposed/ rural sites, as input weather data. This study aims to assess the impacts of urban heat on building thermal performance by coupling a high-resolution urban climate simulation with UBEM. The simulated building thermal performance was compared with and without urban microclimate considerations, using weather data from the TMY, weather observations from an urban oasis, and outputs from the urban climate model. The physical parameters of typical building archetypes used in the UBEM were calibrated against indoor-measured data during summer days. Without considering urban microclimate, there was an underestimation of up to 140% of the average overheating risks of urban buildings. Furthermore, neighboring urban contexts and building ventilation rates considerably affected the thermal performance of individual buildings within high-density urban areas. The study reveals that neglecting the influence of the urban microclimate can result in a notable error in the building thermal performance assessment even at the urban level.


Persistent Identifierhttp://hdl.handle.net/10722/331845
ISSN
2023 Impact Factor: 10.5
2023 SCImago Journal Rankings: 2.545
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, Sheng-
dc.contributor.authorKwok, Yu Ting-
dc.contributor.authorRen, Chao-
dc.date.accessioned2023-09-21T06:59:25Z-
dc.date.available2023-09-21T06:59:25Z-
dc.date.issued2023-07-01-
dc.identifier.citationSustainable Cities and Society, 2023, v. 94-
dc.identifier.issn2210-6707-
dc.identifier.urihttp://hdl.handle.net/10722/331845-
dc.description.abstract<p>Urban microclimate conditions could be an important factor influencing building thermal performance. However, most studies on urban building energy modeling (UBEM) use the typical meteorological year (TMY), often developed from observations of exposed/ rural sites, as input weather data. This study aims to assess the impacts of urban heat on building thermal performance by coupling a high-resolution urban climate simulation with UBEM. The simulated building thermal performance was compared with and without urban microclimate considerations, using weather data from the TMY, weather observations from an urban oasis, and outputs from the urban climate model. The physical parameters of typical building archetypes used in the UBEM were calibrated against indoor-measured data during summer days. Without considering urban microclimate, there was an underestimation of up to 140% of the average overheating risks of urban buildings. Furthermore, neighboring urban contexts and building ventilation rates considerably affected the thermal performance of individual buildings within high-density urban areas. The study reveals that neglecting the influence of the urban microclimate can result in a notable error in the building thermal performance assessment even at the urban level.<br></p>-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofSustainable Cities and Society-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectClimate change-
dc.subjectExtreme heat events-
dc.subjectIndoor thermal comfort-
dc.subjectUrban building energy modeling-
dc.subjectUrban microclimate-
dc.titleInvestigating the impact of urban microclimate on building thermal performance: A case study of dense urban areas in Hong Kong-
dc.typeArticle-
dc.identifier.doi10.1016/j.scs.2023.104509-
dc.identifier.scopuseid_2-s2.0-85151045404-
dc.identifier.volume94-
dc.identifier.eissn2210-6715-
dc.identifier.isiWOS:000969184500001-
dc.identifier.issnl2210-6707-

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