Physiological and Subjective Responses in the Elderly When Using Floor Heating and Air Conditioning Systems

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概要

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• The purpose of this study was to investigate the effects of a floor heating and air conditioning system on thermal responses of the elderly. Eight elderly men and eight university students sat for 90 minutes in a chair under the following 3 conditions: air conditioning system (A), floor heating system (F) and no heating system (C). The air temperature of sitting head height for condition A was 25℃, and the maximum difference in vertical air temperature was 4℃. The air and floor temperature for condition F were 21 and 29℃, respectively. The air temperature for condition C was 15℃. There were no significant differences in rectal temperature and mean skin temperature between condition A and F. Systolic blood pressure of the elderly men in condition C significantly increased compared to those in condition A and F. No significant differences in systolic blood pressure between condition A and F were found. The percentage of subjects who felt comfortable under condition F was higher than that of those under condition A in both age groups, though the differences between condition F and A was not significant. Relationships between thermal comfort and peripheral (e.g., instep, calf, hand) skin temperature, and the relationship between thermal comfort and leg thermal sensation were significant for both age groups. However, the back and chest skin temperature and back thermal sensation for the elderly, in contrast to that for the young, was not significantly related to thermal comfort. These findings suggested that thermal responses and physiological strain using the floor heating system did not significantly differ from that using the air conditioning system, regardless of the subject age and despite the fact that the air temperature with the floor heating system was lower. An increase in BP for elderly was observed under the condition in which the air temperature was 15℃, and it was suggested that it was necessary for the elderly people to heat the room somehow in winter. Moreover, it is particularly important for elderly people to avoid a decrease in peripheral skin temperature, and maintain awareness of the warmth of peripheral areas, such as the leg, in order to ensure thermal comfort.

• 日本生理人類学会の論文

著者

• TOCHIHARA Yutaka

  Kyushu University

• OHNAKA Tadakatsu

  Fukuoka Women's University

• Tochihara Yutaka

  Faculty Of Design Kyushu University

• Tochihara Yutaka

  Department Of Physiological Hygiene National Institute Of Public Health

• Tochihara Yutaka

  Dep. Of Ergonomics Fac. Of Design Kyushu Univ.

• HASHIGUCHI Nobuko

  Kyushu University

• Tsuchida Chiaki

  Kajima Corporation

• Otsuki Tamio

  Association of New Urban Housing Technology

• Ohnaka T

  Department Of Living Environment Fukuoka Women's University

• Hashiguchi Nobuko

  九州大学 芸術工学部人間工学

• Tochihara Yutaka

  Kyushu Institute Of Design

• Ohnaka Tadakatsu

  Fukuoka Women's University

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