Seasonal Variations of Air Temperature for the Thermal Comfort

KUBO Hiroko, ISODA Norio, YANASE Takuko

doi:10.24538/jhesj.1.1_51

We investigated seasonal variations of clothing, thermal sensation and thermal comfort by conducting experiments on females during all the seasons. The experiments were conducted in climate chambers. Air temperatures were 16℃, 20℃, 24℃, 28℃, 32℃ and relative humidity was 50%. Air velocity was still air (<0.15m/s), and mean radiant temperature was equal to air temperature. Subjects were 71 healthy college aged females. They did some sedentary works in casual wear which they were dressed in, and after the experiment do value was calculated. The subjects were exposed to different conditions for 60 minutes. The subjects were asked to report thermal sensation on the 9 category scale and thermal comfort on the 7 category scale. The experiments were conducted seven times from October 1986 to August 1987. The results were as follows: 1) The mean do values of the subjects were about 0.84 clo in winter and 0.4 clo in summer. 2) The air temperatures that the subjects reported to be under thermal neutral conditions were 22℃ in winter and 28℃ in summer. 3) The range of air temperatures that they reported to be comfortable conditions were from 20℃ to 28℃ in winter and from 22℃ to 30℃ in summer. Thus they felt warm (atatakai) in winter and cool (suzushii) in summer.

Seasonal Variations of Air Temperature for the Thermal Comfort

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