Thermal Comfort in High-rise Urban Environments in Singapore

This study assesses the impact of a heat wave on the thermal comfort of an unconstructed area: the North Zone of the Island of Zorrotzaurre (Bilbao, Spain). In this study, the impact of urban planning as proposed in the master plan on thermal comfort is modeled using the ENVI-met program. Likewise, the question of whether the urbanistic proposals are designed to create more resilient urban environments is analyzed in the face of increasingly frequent extreme weather events, especially heat waves. The study is centered on the analysis of temperature variables (air temperature and average radiant temperature) as well as wind speed and relative humidity. This was completed with the parameters of thermal comfort, the physiological equivalent temperature (PET) and the Universal Temperature Climate Index (UTCI) for the hours of the maximum and minimum daily temperatures. The results demonstrated the viability of analyzing thermal comfort through simulations with the ENVI-met program in order to analyze the behavior of urban spaces in various climate scenarios.

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Spatially organized «vertical city» as a synthesis of tall buildings and airships

E3S Web of Conferences ◽

10.1051/e3sconf/20183301002 ◽

2018 ◽

Vol 33 ◽

pp. 01002 ◽

Cited By ~ 1

Author(s):

Olga Gagulina ◽

Sergei Matovnikov

Keyword(s):

Urban Space ◽

Tall Buildings ◽

Urban Environments ◽

Internal Space ◽

Urban Structure ◽

Environmental Aspects ◽

Compact City ◽

Functional Changes ◽

High Rise ◽

City Space

The paper explores the compact city concept based on the «spatial» urban development principles and describes the prerequisites and possible methods to move from «horizontal» planning to «vertical» urban environments. It highlights the close connection between urban space, high-rise city landscape and conveyance options and sets out the ideas for upgrading the existing architectural and urban planning principles. It also conceptualizes the use of airships to create additional spatial connections between urban structure elements and high-rise buildings. Functional changes are considered in creating both urban environment and internal space of tall buildings, and the environmental aspects of the new spatial model are brought to light. The paper delineates the prospects for making a truly «spatial» multidimensional city space.

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Human Thermal Comfort in Sub-tropical Urban Environments

10.1007/978-981-16-5245-5_2 ◽

2021 ◽

pp. 13-33

Author(s):

Kevin Ka-Lun Lau ◽

Zheng Tan ◽

Tobi Eniolu Morakinyo ◽

Chao Ren

Keyword(s):

Thermal Comfort ◽

Urban Environments ◽

Human Thermal Comfort

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Influence of Weather Factors on Thermal Comfort in Subtropical Urban Environments

Sustainability ◽

10.3390/su12052001 ◽

2020 ◽

Vol 12 (5) ◽

pp. 2001 ◽

Cited By ~ 1

Author(s):

Chih-Hong Huang ◽

Hsin-Hua Tsai ◽

Hung-chen Chen

Keyword(s):

Thermal Comfort ◽

Urban Heat Island ◽

Thermal Environment ◽

Urban Environments ◽

Heat Island ◽

Weather Factors ◽

Urban Forms ◽

Thermal Environments ◽

Island Effect ◽

Urban Heat

Urbanization has influenced the distribution of heat in urban environments. The mutual influence between weather factors and urban forms created by dense buildings intensify human perception of the deteriorating thermal environment in subtropics. Past studies have used real-world measurements and theoretical simulations to understand the relationship between climate factors and the urban heat island effect. However, few studies have examined how weather factors and urban forms are connected to the thermal environment. To understand the influence of various weather factors on urban thermal environments in various urban forms, this study applied structural equation modeling to assumptions of linear relationships and used quantitative statistical analysis of weather data as well as structural conversion of this data to establish the structural relationships between variables. Our objective was to examine the relationships among urban forms, weather factors, and thermal comfort. Our results indicate that weather factors do indeed exert influence on thermal comfort in urban environments. In addition, the thermal comfort of urban thermal environments varies with location and building density. In hot and humid environments in the subtropics, humidity and wind speed have an even more profound impact on the thermal environment. Apparent temperature can be used to examine differences in thermal comfort and urban forms. This study also proved that an urban wind field can effectively mitigate the urban heat island effect. Ventilation driven by wind and thermal buoyancy can dissipate heat islands and take the heat away from urban areas.

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Field Measurement and Subjects' Votes Assessment on Thermal Comfort in High-rise Hostels in Malaysia

Indoor and Built Environment ◽

10.1177/1420326x08094585 ◽

2008 ◽

Vol 17 (4) ◽

pp. 334-345 ◽

Cited By ~ 21

Author(s):

N.D. Dahlan ◽

P.J. Jones ◽

D.K. Alexander ◽

E. Salleh ◽

D. Dixon

Keyword(s):

Thermal Comfort ◽

Field Measurement ◽

High Rise

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The most problematic variable in the course of human-biometeorological comfort assessment — the mean radiant temperature

Open Geosciences ◽

10.2478/s13533-011-0010-x ◽

2011 ◽

Vol 3 (1) ◽

Cited By ~ 40

Author(s):

Noémi Kántor ◽

János Unger

Keyword(s):

Thermal Comfort ◽

Short Wave ◽

Urban Environments ◽

Outdoor Thermal Comfort ◽

Radiation Environment ◽

Wave Radiation ◽

Mean Radiant Temperature ◽

Radiation Fluxes ◽

The Mean ◽

Radiant Temperature

AbstractThis paper gives a review on the topic of the mean radiant temperature Tmrt, the most important parameter influencing outdoor thermal comfort during sunny conditions. Tmrt summarizes all short wave and long wave radiation fluxes reaching the human body, which can be very complex (variable in spatial and also in temporal manner) in urban settings. Thermal comfort researchers and urban planners need easy and sound methodological approaches to assess Tmrt. After the basics of the Tmrt calculation some of the methods suitable for obtaining Tmrt also in urban environments will be presented.. Two of the discussed methods are based on instruments which measure the radiation fluxes integral (globe thermometer, pyranometer-pyrgeometer combination), and three of the methods are based on modelling the radiation environment with PC software (RayMan, ENVI-met and SOLWEIG).

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Analyzing Atrium Volume Designs for Hot and Humid Climates

Sustainability ◽

10.3390/su11226213 ◽

2019 ◽

Vol 11 (22) ◽

pp. 6213

Author(s):

Aram ◽

Alibaba

Keyword(s):

Thermal Comfort ◽

User Satisfaction ◽

Simulation Models ◽

Thermal Simulation ◽

Simulation Software ◽

Humid Climate ◽

High Rise ◽

North East ◽

Software Models ◽

Hot And Humid Climates

The objective of this research was to determine the proper thermal comfort in an atrium design for single-floor, medium-rise, and high-rise buildings based on different proportions, placements, window opening ratios, and internal condition systems. EDSL Tas software was used for the dynamic thermal simulation software models, and all were analyzed based on ASHRAE 55, ISO 7730, and EN 15251 standards to determine which dynamic thermal simulation models had thermal comfort in a hot and humid climate throughout the year. This research found that for naturally conditioned single-floor and medium-rise buildings, when the atrium proportion was 1/2 of the office proportion at the southeast and center atrium location, respectively, had maximum user satisfaction. When the building’s internal spaces were mechanically conditioned with a 1/3 and 1/4 atrium proportion of the office proportion in single-floor and medium-rise buildings, respectively, thermal comfort was acceptable, especially when the atrium was located in the center for single-floor and in the northeast for medium-rise buildings. However, the naturally conditioned high-rise building with a north-east atrium that was 1/4 of the office proportion and a mechanically conditioned high-rise with a center atrium 1/3 of the office proportion had the minimum dissatisfaction throughout the year.

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