Temperature and human thermal comfort effects of street trees across three contrasting street canyon environments

2015 ◽  
Vol 124 (1-2) ◽  
pp. 55-68 ◽  
Author(s):  
Andrew M. Coutts ◽  
Emma C. White ◽  
Nigel J. Tapper ◽  
Jason Beringer ◽  
Stephen J. Livesley
Keyword(s):  
Thermal Comfort ◽  
Street Canyon ◽  
Street Trees ◽  
Human Thermal Comfort

scholarly journals Erratum to: Temperature and human thermal comfort effects of street trees across three contrasting street canyon environments

2016 ◽  
Vol 126 (3-4) ◽  
pp. 815-815 ◽  
Author(s):  
Andrew M. Coutts ◽  
Emma C. White ◽  
Nigel J. Tapper ◽  
Jason Beringer ◽  
Stephen J. Livesley
Keyword(s):  
Thermal Comfort ◽  
Street Canyon ◽  
Street Trees ◽  
Human Thermal Comfort

scholarly journals Effects of urban street trees on human thermal comfort and physiological indices: a case study in Changchun city, China

2021 ◽  
Author(s):  
Zhibin Ren ◽  
Hongbo Zhao ◽  
Yao Fu ◽  
Lu Xiao ◽  
Yulin Dong
Keyword(s):  
Blood Pressure ◽  
Thermal Comfort ◽  
Thermal Environment ◽  
Physiological Parameters ◽  
Tree Cover ◽  
Street Trees ◽  
Urban Street ◽  
Human Thermal Comfort ◽  
Physiological Indices ◽  
Urban Thermal Environment

AbstractPlanting trees along urban streets is one of the most important strategies to improve the urban thermal environment. However, the net impacts of urban street trees on human thermal comfort and physiological parameters are still less clear. On three similar east–west orientated streets with different degrees of tree cover—low (13%), medium (35%), and high (75%), urban microclimatic parameters and human physiological indices for six male students were simultaneously measured on three cloudless days in summer 2018. The results show that the differences in tree cover were predominant in influencing urban thermal environment and comfort. The street with the highest tree cover had significantly lower physiological equivalent temperature (PET) and more comfortable than the other two streets. The frequency of strong heat stress (PET > 35 °C) was 64%, 11%, and 0%, respectively, for streets with low, medium, and high tree cover. For the six male university students, human physiological indices varied greatly across the three streets with different tree cover. Systolic blood pressure, diastolic blood pressure, and pulse rate increased with decreasing tree cover. The results also suggest that urban thermal environment and comfort had considerable impact on human physiological parameters. Our study provides reasons for urban planners to plant trees along streets to improve the thermal environment and promote urban sustainability.

Human thermal comfort in summer within an urban street canyon in Central Europe

2008 ◽  
Vol 17 (3) ◽  
pp. 241-250 ◽  
Author(s):  
Helmut Mayer ◽  
Jutta Holst ◽  
Paul Dostal ◽  
Florian Imbery ◽  
Dirk Schindler
Keyword(s):  
Thermal Comfort ◽  
Central Europe ◽  
Street Canyon ◽  
Urban Street Canyon ◽  
Urban Street ◽  
Human Thermal Comfort

scholarly journals Development of a Distributed Modeling Framework to Estimate Thermal Comfort along 2020 Tokyo Olympic Marathon Course

Atmosphere ◽  
2018 ◽  
Vol 9 (6) ◽  
pp. 210 ◽  
Author(s):  
Satoshi Hirabayashi ◽  
Tsutomu Abe ◽  
Fumiko Imamura ◽  
Chie Morioka
Keyword(s):  
Solar Radiation ◽  
Thermal Comfort ◽  
Air Temperature ◽  
Energy Budget ◽  
View Factor ◽  
Street Trees ◽  
M Cell ◽  
Modeling Framework ◽  
Distributed Modeling ◽  
Human Thermal Comfort

Heat stress is an issue for marathon races in the summer, such as the one planned for the 2020 Tokyo Summer Olympic games. The Tokyo Metropolitan Government is planning to grow existing street trees’ canopies to enlarge their shade to reduce air temperature and solar radiation. To formulate a baseline to assess the effect of street trees and buildings on human thermal comfort, Distributed-COMfort FormulA (D-COMFA), a prototype of a distributed computer model using a geographic information system (GIS) was developed. D-COMFA calculates the energy budget of a human body on a 1 m cell basis, using readily available datasets such as weather measurements and polygon data for street structures. D-COMFA was applied to a street segment along the marathon course in Tokyo on an hourly-basis on 9 August 2016, the hottest day in Tokyo in 2016. Our case study showed that the energy budget was positively related to the sky view factor, air temperature, and solar radiation. The energy budget was reduced on average by 26–62% in the shade throughout the day.

scholarly journals Impacts of Tree Canopy Cover on Microclimate and Human Thermal Comfort in a Shallow Street Canyon in Wuhan, China

Atmosphere ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 588
Author(s):  
Zhuodi Huang ◽  
Changguang Wu ◽  
Mingjun Teng ◽  
Yaoyu Lin
Keyword(s):  
High Temperature ◽  
Thermal Comfort ◽  
Street Canyon ◽  
Thermal Sensation ◽  
Canopy Cover ◽  
Tree Canopy ◽  
High Humidity ◽  
Human Thermal Comfort ◽  
Air Temperatures ◽  
Tree Canopy Cover

Increasing the number of street trees can be a promising method to reduce impacts of climate change currently impacting urban public health. However, the quantitative relationships between tree canopy cover and thermal comfort remains unclear, particularly in areas with high temperature and high humidity. This study aims to provide a better understanding of the effects of different degrees of tree canopy cover on human thermal comfort in shallow street canyons in a high temperature, high humidity area of China. Microclimatic measurements and qualitative surveys were conducted on sunny summer days in a shallow street canyon in Wuhan. The results suggest that microclimate benefits are greater for areas with a high-percentage tree canopy cover compared to medium- and low-percentage tree canopy cover—especially at noon. In streets with a high-percentage tree canopy cover, afternoon air temperatures and mean radiant temperatures can be reduced by up to 3.3 °C and 13.9 °C, respectively, compared to a similar street with no tree shade. The thermal sensation prediction formula is proposed and the relationship between human thermal sensation and microclimate factors is established. Blocking solar radiation and increasing wind speed are more feasible than controlling air temperature and humidity as ways to improve human thermal comfort.

Analysis of the Influence of Age on Human Thermal Comfort

ICCREM 2020 ◽  
2020 ◽  
Author(s):  
Boshuai Dong ◽  
Chunjing Shang ◽  
Ming Tong ◽  
Jianhong Cai
Keyword(s):  
Thermal Comfort ◽  
Human Thermal Comfort

OVERVIEW OF URBAN HEAT ISLAND (UHI) PHENOMENON TOWARDS HUMAN THERMAL COMFORT

2017 ◽  
Vol 16 (9) ◽  
pp. 2097-2111 ◽  
Author(s):  
Mohanadoss Ponraj ◽  
Yee Yong Lee ◽  
Mohd Fadhil Md Din ◽  
Zainura Zainon Noor ◽  
Kenzo Iwao ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Urban Heat Island ◽  
Heat Island ◽  
Human Thermal Comfort ◽  
Urban Heat

scholarly journals Evaporative Cooling Options for Building Air-Conditioning: A Comprehensive Study for Climatic Conditions of Multan (Pakistan)

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3061 ◽  
Author(s):  
Shazia Noor ◽  
Hadeed Ashraf ◽  
Muhammad Sultan ◽  
Zahid Mahmood Khan
Keyword(s):  
Thermal Comfort ◽  
Co2 Emissions ◽  
Air Conditioning ◽  
Evaporative Cooling ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Maximum Temperature ◽  
Human Thermal Comfort ◽  
Work Input ◽  
System Configurations

This study provides comprehensive details of evaporative cooling options for building air-conditioning (AC) in Multan (Pakistan). Standalone evaporative cooling and standalone vapor compression AC (VCAC) systems are commonly used in Pakistan. Therefore, seven AC system configurations comprising of direct evaporative cooling (DEC), indirect evaporative cooling (IEC), VCAC, and their possible combinations, are explored for the climatic conditions of Multan. The study aims to explore the optimum AC system configuration for the building AC from the viewpoints of cooling capacity, system performance, energy consumption, and CO2 emissions. A simulation model was designed in DesignBuilder and simulated using EnergyPlus in order to optimize the applicability of the proposed systems. The standalone VCAC and hybrid IEC-VCAC & IEC-DEC-VCAC system configurations could achieve the desired human thermal comfort. The standalone DEC resulted in a maximum COP of 4.5, whereas, it was 2.1 in case of the hybrid IEC-DEC-VCAC system. The hybrid IEC-DEC-VCAC system achieved maximum temperature gradient (21 °C) and relatively less CO2 emissions as compared to standalone VCAC. In addition, it provided maximum cooling capacity (184 kW for work input of 100 kW), which is 85% higher than the standalone DEC system. Furthermore, it achieved neutral to slightly cool human thermal comfort i.e., 0 to −1 predicted mean vote and 30% of predicted percentage dissatisfied. Thus, the study concludes the hybrid IEC-DEC-VCAC as an optimum configuration for building AC in Multan.

Public Urban Open Space and Human Thermal Comfort: The Implications of Alternative Climate Change and Socio-economic Scenarios

2008 ◽  
Vol 10 (1) ◽  
pp. 31-45 ◽  
Author(s):  
Elizabeth Wilson ◽  
Fergus Nicol ◽  
Leyon Nanayakkara ◽  
Anja Ueberjahn-Tritta
Keyword(s):  
Climate Change ◽  
Thermal Comfort ◽  
Open Space ◽  
Urban Open Space ◽  
Human Thermal Comfort
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