New index indicating the universal and separate effects on human comfort under outdoor and non-uniform thermal conditions

Nagano, Kazuo; Horikoshi, Tetsumi

doi:10.1016/j.enbuild.2011.03.012

Cited by 41 publications

(18 citation statements)

References 14 publications

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“…More recently, a new outdoor thermal index indicating universal and separate effects on human thermal comfort for uniform conditions (ETVO) [427] and for non-uniform conditions (the universal effective temperature -ETU) [428] were proposed by Nagano and Horikoshi. Another proposed thermal index is the Universal Thermal Climate Index (UTCI) based on an advanced multi-node model of thermoregulation [429].…”

Section: Outdoor Thermal Comfort Modelsmentioning

confidence: 99%

A review of human thermal comfort in the built environment

Rupp

Vásquez

Lamberts

2015

Energy and Buildings

695

282

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Section: Outdoor Thermal Comfort Modelsmentioning

confidence: 99%

A review of human thermal comfort in the built environment

Rupp

Vásquez

Lamberts

2015

Energy and Buildings

695

282

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“…The indices were mainly divided into two types based on their assumptions, empirical studies and the heat budget model of human body. Nagano and Horikoshi [25] summarized these indices and presented their availabilities for different problems. The OUT_SET * [26,27] transferred from the standard effective temperature (SET * ) of indoor version [23] for the outdoor use by simplifying the complicated radiation environment into "standard" environment was an empirical index.…”

Section: Introductionmentioning

confidence: 99%

A new method to assess spatial variations of outdoor thermal comfort: Onsite monitoring results and implications for precinct planning

Niu

Liu

Lee

et al. 2015

Building and Environment

164

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a b s t r a c tResidents wish to have outdoor spaces to enjoy walking, cycling, and other recreational activities, which are often hindered by the unfavorable thermal comfort conditions, especially in the summer. High building densities lower the average wind speed and this intensifies the urban heat island effects at city scale. The conscientious use of building morphology to create local thermal comfort zone at selected spots in a large precinct is becoming a pressing issue for sustainable urbanization. This paper is a proof of concept study via continuous monitoring of the pedestrian level winds and thermal parameters at two sample days in summer, which include instantaneous air temperature, globe temperature, wind speed and humidity. Three outdoor locations at an university campus are chosen and daytime thermal perceptions at the three sites were evaluated using PET (Physiological equivalent temperature). A PET based new index was defined, which is called the thermally-perceivable environmental parameter difference. By analyzing the simultaneous differences of radiant temperature, wind speed and air temperature between the monitored spots, it is shown that it was the wind speed and radiant temperature differences that were making significant differences in thermal comfort. This pilot study clearly indicates that wind amplification combined with shading effects can generate thermally comfortable conditions in the open ground floor beneath an elevated building, even on a sunny, hot summer day in a subtropical city. This finding helps to alert city planners of additional options available in precinct planning to encourage outdoor activities.

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“…Table 4 illustrates the simulation conditions of this study. Many indices are being used to evaluate thermal comfort in outdoor environments, such as: the Physiological Equivalent Temperature (PET) (Höppe, 1999), the Actual Sensation Vote (ASV) (Nikolopoulou, 2004), the Effective Universal Temperature (ETU) (Nagano & Horikoshi, 2011), the Wet Bulb Globe Temperature (WBGT) (Yaglou & Minard, 1957), the Effective Temperature (ET) (Houghton & Yaglo, 1923) and the New Standard Effective Temperature (SET*) (Gagge, Stolwijk, & Hardy, 1967). (Jendritzky, de Dear, & Havenith, 2012).…”

Section: Simulation Procedurementioning

confidence: 99%

Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate

Nasrollahi

Hatami

Khastar

et al. 2017

Sustainable Cities and Society

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The growing interest in thermal comfort of outdoor environments yields in different analysis on courtyards as a common space between urban and architectural scales. However, there is a limited knowledge regarding the microclimatic behavior of such spaces. Using ENVI-met simulations, this paper aims to numerically discuss the thermal performance of different configurations of traditionally designed courtyards in Shiraz, Iran, which experiences hot summers and cold winters. The geometrical effects such as orientation and H/W (height to width ratio) of courtyards are considered as potential parameters to improve the microclimatic conditions. In this paper, PMV and UTCI are used as thermal comfort indices.The obtained results indicate mean radiant temperature and wind speed as the most effective parameters for thermal comfort of courtyards. In addition, the aforementioned geometrical parameters might not be able to solely create a desirable condition, but they could significantly improve the thermal comfort of courtyards during summer and winter. To achieve a desirable thermal comfort level, the results suggest using configurations of a high H/W rate and southward orientation in order to obtain better shading during summer as well as allowing the solar radiation in while regulating the wind speed in winter.

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New index indicating the universal and separate effects on human comfort under outdoor and non-uniform thermal conditions

Cited by 41 publications

References 14 publications

A review of human thermal comfort in the built environment

A review of human thermal comfort in the built environment

A new method to assess spatial variations of outdoor thermal comfort: Onsite monitoring results and implications for precinct planning

Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate

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