Experimental Study on Individual Variation of Preferred Air Temperature in Summer

Abstract

The purpose of this study is to investigate the difference of preferred air temperature in summer ． The experiments were combined in cHmate chamber where we cou 【 d regutate air temperature inside ． The subjects who were 29 hea且 thy women regulated air tempe τatu 爬 for 120 minutes ． The results were as f6110ws ； Preferred air temperatures were 丘om 23． 6°C to 30 ． 8℃ ． The average of the preferred air temperature was 27 ， 0℃ ， alld stanClard cleviation of that was 2 ． 0℃ ． At the preferred air temperature ， the mean skin temperature ranged from 31 ． 8℃ to 35 ． 0℃ ， There we 【e differences f「 om persQn to person in skin temperature and the heat loss． Key ｝ ツ0 厂 ds ： 14d ' レ' dual va 吻 "0 π 5LP 厂eferred air tempera ' μ 厂θ， Therma 'comfor ち

A study on the thermal comfort and clothing insulation characteristics of preschool children in Korea

“…It is characterized by the presentation of subjective evaluations, which are affected not only by personal factors but also by psychological factors, the time of day, or by physical conditions [8]. In a study conducted by Sassa et al, when individuals were allowed to adjust indoor temperatures to the temperatures felt comfortable by them in an artificial climate room where temperatures were not indicated, a large temperature difference of 7.2 C was seen among 29 test subjects [9,10]. Thus, the definition of "thermal comfort" differs depending on behavior patterns, psychological conditions, climate, race, age, gender, and the degree of fatigue that subjects experience [8,11].…”

Interindividual differences in thermal comfort and the responses to skin cooling in young women

“…The average (SD) preferred T a of all the subjects was 28.9(0.7) 1C, which is higher than what has been previously reported in studies that adopted the same method of operating a switch to change T a in a climate chamber according to personal preference. The previously reported averages (SD) of preferred T a are 25.2 (1.2) 1C, 26.6(2.3) 1C, and 27.0(2.0) 1C in studies by Fanger et al (1974), Grivel and Candas (1991), and Sassa et al (2000), respectively. The clo value in Fanger's study (0.6 clo) is higher than that in the present study.…”

“…Fanger et al (1974) defined the state of neutrality for the subjects as the state in which they prefer neither warm nor cool environment. However, in the present study and those by Grivel and Candas (1991) and Sassa et al (2000), the preferred T a was defined for the subjects as the state in which they feel comfortable in a thermal environment. The subjects in Grivel's study rated TS from '' À 1: slightly cold'' to ''1: slightly warm'' (average ¼ À0.1), and those in the study by Sassa et al rated it from '' À 1: slightly cool'' to ''0: neutral'' (average¼ À0.55).…”

“…The subjects were initially grouped into 2 groups on the basis of their preferred T a as described by Sassa et al (2000). Subjects preferring Z29 1C as the T a were preferred high ambient temperature, were categorized into the H group, those preferring o29 1C as T a were preferred medium ambient temperature, were categorized into the M group.…”