Fashion & Textile Research Journal (한국의류산업학회지)

The Society of Fashion and Textile Industry (한국의류산업학회)
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Developing Liquid Cooling Garments to Alleviate Heat Strain of Workers in Summer and Exploring Effective Cooling Temperature and Body Regions

여름철 작업자들의 고체온증 예방을 위한 액체냉각복 개발 및 효과적인 냉각온도와 인체 냉각부위 탐색

  • Jung, Jae-Yeon (Dept. of Textiles, Merchandising, and Fashion Design, Seoul National University) ;
  • Kang, Juho (Dept. of Physical Education, Seoul National University) ;
  • Seol, Seonhong (Dept. of Textiles, Merchandising, and Fashion Design, Seoul National University) ;
  • Lee, Joo-Young (Dept. of Textiles, Merchandising, and Fashion Design, Seoul National University)
  • Received : 2020.03.09
  • Accepted : 2020.04.23
  • Published : 2020.04.30
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Abstract

The purpose of the present study was to explore the most effective body region and cooling temperature to alleviate heat strain of workers in hot environments. We developed liquid cooling hood, vest, sleeves and socks and applied the water temperatures of 10, 15, 20, and 25℃ through the liquid cooling garments in a hot and humid environment (33℃ air temperature and 70% RH air humidity). A healthy young male participated in a total of 16 experimental trials (four cooling garments × four cooling temperatures) with the following protocol: 10-min rest, 40-min exercise on a treadmill and 10-min recovery. The results showed that rectal temperature, mean skin temperature, and ratings of perceived exertion during exercise; heart rate and diastolic blood pressure during recovery; and total sweat rate were lower for the vest condition than other garment conditions(p < .05). However, there was no differences in mean skin temperature among the four cooling garments when we compared the values converted by covering area(%BSA). When we classified the results by cooling temperature, there were no consistent differences in thermoregulatory and cardiovascular responses among the four temperatures, but 25℃ water temperature was evaluated as being the most ineffective cooling temperature in terms of subjective responses. In conclusion, the results indicated that wearing cooling vest with < 20℃ cooling temperature can alleviate heat strain of workers in hot and humid environments. If the peripheral body regions are cooled with liquid cooling garments, larger cooling area with lower cooling temperature than 10℃ would be effective to reduce heat strain of workers. Further studies with a vaild number of subjects are required.

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References

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