A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Application of Universal Thermal Climate Index (UTCI) for microclimatic analysis in urban thermal environments
https://orcid.org/0000-0002-5455-8371
https://orcid.org/0000-0003-4913-9145
Highlights Universal Thermal Climate Index (UTCI) works well for outdoor thermal environments. Human bioclimatic maps are useful representations of outdoor thermal conditions. ENVI-met for wind speeds and HURES model for radiation simulation can be used. Direct beam solar radiation was the dominant summertime UTCI control.
Abstract Microclimatic effects were investigated for human thermal sensation on human bioclimatic maps in summer, 2009 using the Universal Thermal Climate Index (UTCI). Study locations were downtown Nanaimo, BC, Canada and Changwon, Republic of Korea. Air temperatures and humidities of several sites were collected at the two locations. Mean radiant temperatures of outdoor study areas in high resolution were simulated with the HURES human-urban radiation exchange simulation model. Wind speeds estimated using the ENVI-met model were corrected using collected wind speed data and adjusted from one to ten meters above the surface via UTCI's wind speed converting formula. Greatest heat stress was around mid-afternoon. Sunny areas had moderate to strong heat stress, 28–38°C UTCI. Shady areas had no thermal stress to moderate heat stress, 20–27°C UTCI. Narrow streets had lower UTCI's than open spaces in both areas. A 1ms−1 reduction in 10m height wind speed (u) increased UTCI by 1°C. In this study, u varied by up to 3.3ms−1. Observed direct beam solar radiation variations changed UTCI by three heat stress levels, diffuse and reflected solar radiation and longwave radiation changed it by 1.5 levels and u altered UTCI by half a level. UTCI is an accepted, easy to determine human thermal index whose results can be mapped as human bioclimatic maps and should be a useful tool for analyzing possible outdoor human thermal effects of urban and landscape planning and design.
Application of Universal Thermal Climate Index (UTCI) for microclimatic analysis in urban thermal environments
https://orcid.org/0000-0002-5455-8371
https://orcid.org/0000-0003-4913-9145
Highlights Universal Thermal Climate Index (UTCI) works well for outdoor thermal environments. Human bioclimatic maps are useful representations of outdoor thermal conditions. ENVI-met for wind speeds and HURES model for radiation simulation can be used. Direct beam solar radiation was the dominant summertime UTCI control.
Abstract Microclimatic effects were investigated for human thermal sensation on human bioclimatic maps in summer, 2009 using the Universal Thermal Climate Index (UTCI). Study locations were downtown Nanaimo, BC, Canada and Changwon, Republic of Korea. Air temperatures and humidities of several sites were collected at the two locations. Mean radiant temperatures of outdoor study areas in high resolution were simulated with the HURES human-urban radiation exchange simulation model. Wind speeds estimated using the ENVI-met model were corrected using collected wind speed data and adjusted from one to ten meters above the surface via UTCI's wind speed converting formula. Greatest heat stress was around mid-afternoon. Sunny areas had moderate to strong heat stress, 28–38°C UTCI. Shady areas had no thermal stress to moderate heat stress, 20–27°C UTCI. Narrow streets had lower UTCI's than open spaces in both areas. A 1ms−1 reduction in 10m height wind speed (u) increased UTCI by 1°C. In this study, u varied by up to 3.3ms−1. Observed direct beam solar radiation variations changed UTCI by three heat stress levels, diffuse and reflected solar radiation and longwave radiation changed it by 1.5 levels and u altered UTCI by half a level. UTCI is an accepted, easy to determine human thermal index whose results can be mapped as human bioclimatic maps and should be a useful tool for analyzing possible outdoor human thermal effects of urban and landscape planning and design.
Application of Universal Thermal Climate Index (UTCI) for microclimatic analysis in urban thermal environments
https://orcid.org/0000-0002-5455-8371
https://orcid.org/0000-0003-4913-9145
Highlights Universal Thermal Climate Index (UTCI) works well for outdoor thermal environments. Human bioclimatic maps are useful representations of outdoor thermal conditions. ENVI-met for wind speeds and HURES model for radiation simulation can be used. Direct beam solar radiation was the dominant summertime UTCI control.
Abstract Microclimatic effects were investigated for human thermal sensation on human bioclimatic maps in summer, 2009 using the Universal Thermal Climate Index (UTCI). Study locations were downtown Nanaimo, BC, Canada and Changwon, Republic of Korea. Air temperatures and humidities of several sites were collected at the two locations. Mean radiant temperatures of outdoor study areas in high resolution were simulated with the HURES human-urban radiation exchange simulation model. Wind speeds estimated using the ENVI-met model were corrected using collected wind speed data and adjusted from one to ten meters above the surface via UTCI's wind speed converting formula. Greatest heat stress was around mid-afternoon. Sunny areas had moderate to strong heat stress, 28–38°C UTCI. Shady areas had no thermal stress to moderate heat stress, 20–27°C UTCI. Narrow streets had lower UTCI's than open spaces in both areas. A 1ms−1 reduction in 10m height wind speed (u) increased UTCI by 1°C. In this study, u varied by up to 3.3ms−1. Observed direct beam solar radiation variations changed UTCI by three heat stress levels, diffuse and reflected solar radiation and longwave radiation changed it by 1.5 levels and u altered UTCI by half a level. UTCI is an accepted, easy to determine human thermal index whose results can be mapped as human bioclimatic maps and should be a useful tool for analyzing possible outdoor human thermal effects of urban and landscape planning and design.
Application of Universal Thermal Climate Index (UTCI) for microclimatic analysis in urban thermal environments
Park, Sookuk (author) / Tuller, Stanton E. (author) / Jo, Myunghee (author)
Landscape and Urban Planning ; 125 ; 146-155
2014-02-08
10 pages
Article (Journal)
Electronic Resource
English