The influence of outdoor thermal environment on young Japanese females

Kurazumi, Yoshihito; Ishii, Jin; Kondo, Emi; Fukagawa, Kenta; Bolashikov, Zhecho Dimitrov; Sakoi, Tomonori; Tsuchikawa, Tadahiro; Matsubara, Naoki; Horikoshi, Tetsumi

doi:10.1007/s00484-013-0681-8

Cited by 16 publications

(43 citation statements)

References 33 publications

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“…In a range where the air temperature is about 31˚C or more, there is a tendency for mean skin temperature distribution to be low, unlike the tendency shown when the air temperature is in the range up to about 30˚C. It cannot be clarified when the air temperature is in the range of about 31˚C or more because there are few samples, but similar to the results shown in the outdoor experiment of Kurazumi et al [26], it seems there is a cooling effect due to the rapid increase of water evaporation calories due to perspiration, which suppresses the rise in temperature of the skin surface.…”

Section: Discussionsupporting

confidence: 46%

“…Although it is uncomfortable thermally, it could be that people tolerate a wider range of thermal environments in outdoor spaces where they can change the selection of place and viewpoint at their own will. In other words, it is thought that due to the degree of freedom of behavior in the experimental environment, large fluctuations in the psychological reactions of the human body occurred in the outdoor space [26]. The outdoor thermal environmental factors of short-wavelength solar radiation, long-wavelength radiation and air current are uneven and non-targeted evaluation factors.…”

Section: Relationship Between Etfe and Thermal Sensationmentioning

confidence: 99%

“…[25] [26]. The climate of Bangkok in Thailand is hottest in the dry season, so it can be regarded as summer.…”

Section: Relationship Between Etfe and Thermal Sensationmentioning

confidence: 99%

“…The sensational and physiological climatic environment index ETFe [25] [26] [27] [29] [30] converts the effects of the following parameters into a temperature-equivalent value: change in posture, air velocity, long-wave radiation in outdoor space, short-wave solar radiation, contact material surface temperature, and humidity.…”

Section: Etfementioning

confidence: 99%

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Seasonal Differences of Psychological and Physiological Responses in Tropical Urban Climate

Kurazumi¹,

Ishii²,

Fukagawa³

et al. 2017

Health

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This research aims to use the outdoor thermal environment evaluation index ETFe to quantify effects on the thermal sense of the human body of a tropical region climate with small annual temperature differences, and to examine seasonal differences in the thermal sense. Given that the average temperature of the earth is forecasted to rise, studying the effects on the human body from outdoor thermal environments in tropical regions is important for considering how to spend time outdoors in the future. This study clarifies seasonal differences in effects on the human body by comparing the effects on the thermal sensations of the human body from outdoor thermal environments in the winter and the dry season of Bangkok, Thailand in the tropics. The mobile measurements were carried out on the campus of Chulalongkorn University, Bangkok, Thailand. The subjects reported the thermal sensation and the thermal comfort that they experienced while exposed at the observation point. Air temperature, humidity, air velocity, short-wave solar radiation, long-wave thermal radiation, ground surface temperature, sky factor and the ratio of green and water surface solid angles were measured. We found no large seasonal difference between the winter and the dry season in skin temperature due to body temperature regulation. It is clear that in the winter season, people prefer a lower temperature than in the dry season, and in the dry season they tolerate higher temperatures than in winter. The effect of the seasonal difference appears in the amount of change to thermal sensation. We found that it is difficult for seasonal differences to greatly affect the amount of change to thermal comfort. We found that the effect of seasonal difference is that people show stronger responses to thermal comfort for thermal sensation 897in winter than in the dry season.

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Section: Discussionsupporting

confidence: 46%

Section: Relationship Between Etfe and Thermal Sensationmentioning

confidence: 99%

“…[25] [26]. The climate of Bangkok in Thailand is hottest in the dry season, so it can be regarded as summer.…”

Section: Relationship Between Etfe and Thermal Sensationmentioning

confidence: 99%

Section: Etfementioning

confidence: 99%

See 2 more Smart Citations

Seasonal Differences of Psychological and Physiological Responses in Tropical Urban Climate

Kurazumi¹,

Ishii²,

Fukagawa³

et al. 2017

Health

Self Cite

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“…For the emissivity on the human body, we used 0.98, derived from the degree of reflection on the skin of electromagnetic waves of 3 μm and above [18]. Because perspiration was difficult to ascertain, we used the thermoregulation model of Kurazumi et al [19] to arrive at these values. We then calculated ETF as theorized and validated by Kurazumi et al [20,21] based on thermal environment measures as well as skin temperature and amount of clothing.…”

Section: Observed Results On Thermal Environmentsmentioning

confidence: 99%

Effects of Visual Stimuli upon Thermal Sense under Air Conditioning in Summer

K¹

2014

J Ergonomics

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Human thermal sense is not expressed only by simple heat equilibrium. The influence of visual and auditory stimuli causes differences in overall thermal sense arrived at by sophisticated sensory processing by the cerebrum. If it can be clearly shown that a thermal environment considered slightly uncomfortable could be ameliorated using visual stimuli, the cost effectiveness of such an initiative would be highly significant, particularly in terms of air conditioning system running costs. Focusing on the visual stimuli provided by greenery, experiments were conducted in a thermal environment deemed slightly uncomfortable, where the temperature was set at a base point of 28ºC. Experiments were conducted in a temperature-controlled room. Thermal environmental conditions were set at three different temperatures: 25ºC, 28ºC and 31ºC. Wall surface temperatures were set to equal these temperatures. Air velocity (calm air currents of 0.2 m/s or less) and relative humidity (60% RH) were set the same throughout. Subjects were asked to sit quietly for the test. The visual stimuli consisted of ten different types of scenery, including that of leafy vegetation. The influence of overall stimuli of the cerebrum on the indoor thermal environmental index ETF was determined to prove the significance of actively placing visual stimuli in spaces. Thermal stimuli influence the human body on mean skin temperatures, while visual stimuli do not affect mean skin temperatures. In ETF deemed fairly uncomfortable, that is at a range of hotter than 28-29ºC, clear improvements were observed in thermal sense due to the influence of visual stimuli such as natural elements including vegetation like greenery. Visual stimuli were appropriate at a level of up to 69% greenery, where a dynamic effect on warmer environmental conditions can be felt and where the depth of fuller vegetation cover can be perceived.

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