A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort

The worsening urban heat island (UHI) effect poses a great challenge to the thermal comfort of people outdoors. However, there has not been a summary of the mechanisms by which UHI affects outdoor thermal comfort (OTC). This paper reviews the commonly used OTC evaluation indexes, data collection met...

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Main Authors: Jianlin Ren, Kaizhe Shi, Zhe Li, Xiangfei Kong, Haizhu Zhou
Format: Article
Language:English
Published: MDPI AG 2023-05-01
Series:Buildings
Subjects:
Online Access:https://www.mdpi.com/2075-5309/13/6/1368
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author Jianlin Ren
Kaizhe Shi
Zhe Li
Xiangfei Kong
Haizhu Zhou
author_facet Jianlin Ren
Kaizhe Shi
Zhe Li
Xiangfei Kong
Haizhu Zhou
author_sort Jianlin Ren
collection DOAJ
description The worsening urban heat island (UHI) effect poses a great challenge to the thermal comfort of people outdoors. However, there has not been a summary of the mechanisms by which UHI affects outdoor thermal comfort (OTC). This paper reviews the commonly used OTC evaluation indexes, data collection methods, and mitigation measures and discusses the relationship between UHI and OTC. The review is limited to peer-reviewed journal publications found in five databases: Science Direct, Scopus, Google Scholar, PubMed, and Web of Science. The review results indicate that physiological equivalent temperature (PET), universal thermal climate index (UTCI), and wet bulb globe temperature (WBGT) are the most widely used indexes in outdoor thermal comfort studies. The data collection methods mainly include questionnaire surveys, measurement, simulation, and formula calculation. There are four main approaches to mitigating the UHI effect in order to improve the comfort of people outdoors: vegetation strategies, water strategies, urban planning strategies, and material strategies. Future research can focus on developing OTC research methods and indexes and combine thermal comfort with visual comfort, auditory comfort, etc. to better evaluate the overall comfort.
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spelling doaj.art-9985e0ec9cbe48549321a6adfa7499172023-11-18T09:37:19ZengMDPI AGBuildings2075-53092023-05-01136136810.3390/buildings13061368A Review on the Impacts of Urban Heat Islands on Outdoor Thermal ComfortJianlin Ren0Kaizhe Shi1Zhe Li2Xiangfei Kong3Haizhu Zhou4School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, ChinaChina Academy of Building Research, Beijing 100010, ChinaThe worsening urban heat island (UHI) effect poses a great challenge to the thermal comfort of people outdoors. However, there has not been a summary of the mechanisms by which UHI affects outdoor thermal comfort (OTC). This paper reviews the commonly used OTC evaluation indexes, data collection methods, and mitigation measures and discusses the relationship between UHI and OTC. The review is limited to peer-reviewed journal publications found in five databases: Science Direct, Scopus, Google Scholar, PubMed, and Web of Science. The review results indicate that physiological equivalent temperature (PET), universal thermal climate index (UTCI), and wet bulb globe temperature (WBGT) are the most widely used indexes in outdoor thermal comfort studies. The data collection methods mainly include questionnaire surveys, measurement, simulation, and formula calculation. There are four main approaches to mitigating the UHI effect in order to improve the comfort of people outdoors: vegetation strategies, water strategies, urban planning strategies, and material strategies. Future research can focus on developing OTC research methods and indexes and combine thermal comfort with visual comfort, auditory comfort, etc. to better evaluate the overall comfort.https://www.mdpi.com/2075-5309/13/6/1368urbanizationevaluation indexmitigation approachoverall human comfortsustainable city
spellingShingle Jianlin Ren
Kaizhe Shi
Zhe Li
Xiangfei Kong
Haizhu Zhou
A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort
Buildings
urbanization
evaluation index
mitigation approach
overall human comfort
sustainable city
title A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort
title_full A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort
title_fullStr A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort
title_full_unstemmed A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort
title_short A Review on the Impacts of Urban Heat Islands on Outdoor Thermal Comfort
title_sort review on the impacts of urban heat islands on outdoor thermal comfort
topic urbanization
evaluation index
mitigation approach
overall human comfort
sustainable city
url https://www.mdpi.com/2075-5309/13/6/1368
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