Correlation between Standard New Effective Temperature (SET^*) and Thermal Sensation in Case of Different Activities : Comparisons of Correlation between SET^* and Thermal Sensation at Walking and at Sitting

DOI Web Site 4 Citations
  • FUKAI Kazuo
    Department of Architecture and Building Sciences, Yokohama National University
  • ITO Hiromu
    Technology Research Center, Taisei Corporation
  • SAITO Junji
    Housing Division, Taisei Corporation
  • GOTOH Shigeru
    Department of Architecture and Building Sciences, Ashikaga Institute of Technology

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Other Title
  • 代謝量の異なる場合の標準新有効温度(SET^*)と温熱感覚の関係 : 歩行時と椅座安静時の比較
  • 代謝量の異なる場合の標準新有効温度(SET※)と温熱感覚の関係--歩行時と椅座安静時の比較
  • タイシャリョウ ノ コトナル バアイ ノ ヒョウジュン シン ユウコウ オンド

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In order to use SET^* as a thermal index to the prediction of thermal sensation and the evaluation of thermal environment, it is necessary to clarify the correlation between SET^* and thermal sensation. In our previous papers, the regression line between SET^* and the whole body thermal sensation was shown as a result of the winter and summer subjective experiments, and the zone of thermal neutrality with thermal sensation votes ranging from 4: slightly cool to 6: slightly warm was concluded around 22〜26℃ SET^*. However, it has not been experimentally confirmed that the correlation between SET^* and thermal sensation is the same regardless of activity levels. This paper reports the results of a series of walking experiments and compares them with the results of sedentary experiments. In the walking experiments, 4 male and 4 female subjects were exposed to 10 different conditions ranging from about 18 to 31℃ SET^* for about 1hour, and they were made to keep on walking at the same place for 1hour. Metabolic rate of walking subjects was judged at 1.5met. The main results are shown as follows. 1) The significant correlations (R≧0.88) were found between SET^* and whole body thermal sensation votes for any male and female subjects other than one male who voted nearly neutral sensation in the range of 18〜31℃ SET^*. 2) Individual regression lines tended to converge at higher temperature side than neutrality. 3) The regression lines for each individual were very similar in both walking and sedentary experiments. 4) No sexual difference was observed in those regression lines as well as in the sedentary experiments. 5) The regression line resulting from the walking experiments was almost equal to the one from the sedentary experiments. 6) SET^* at thermal neutrality (TSV=5) calculated from the regression line was 24.2℃ at walking and 23.3℃ in a sedentary posture, so that the difference between two was within 1℃. As a result of this study, it has been experimentally proved that the value of SET^* at people feel comfortable is always the same under the condition of various metabolic rates.

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