Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Evaluation of Thermal Comfort during Sleeping in Summer - Part IV : Study on Indoor Temperature Conditions for Comfort Sleep -

여름철 수면시 온열쾌적감 평가 - 제4보 : 쾌적수면을 위한 실내온도 설정에 관한 연구 -

  • Kum, Jong-Soo (Department of Mechanical Engineering, Pukyung National University) ;
  • Kim, Dong-Gyu (Department of Mechanical Engineering, Pukyung National University) ;
  • Park, Jong-Il (Department of Building System Engineering, Dongeui University)
  • 금종수 (부경대학교 기계공학부) ;
  • 김동규 (부경대학교 기계공학부) ;
  • 박종일 (동의대학교 건축설비공학과)
  • Published : 2007.04.10
Download PDF
⟨ Previous Next ⟩

Abstract

This study was performed to evaluate sleep efficiencies and conditions for comfortable sleep based on the analysis of sleep efficiency and MST under four thermals conditions ($22^{\circ}C,\;24^{\circ}C,\;26^{\circ}C,\;30^{\circ}C$). Five female subjects who have similar life cycle and sleep patterns were participated for the sleep experiment. Their age was from 20 to 22 years old. They were healthy, and had regular sleep with consistent bed and wakeup time. It was checked whether they had a good sleep before the night of experiment. Experiments were performed in an environmental chamber using thermo-hygrostat. The physiological signal (EEG) for sleep stage were obtained from C3-A2 and C4-Al electrode sites. Sleep stages were classified, then SWS latency and SWS/TST were calculated for the evaluation for sleep efficiencies on thermal conditions. As results, mean skin temperature for comfort sleeping was $34.5{\sim}35.4^{\circ}C$. Considering sleep efficiency and mean skin temperature, indoor room temperature of upper limit was $28.1^{\circ}C$.

Keywords

References

  1. Lee, S. W. and Kwon, S. A., 1997, Thermal environment and bedclimate on Ondol during sleeping in each season, Journal of the Korean Socity of Clothing and Textiles, Vol. 21, No.7, pp, 1162-1172
  2. Kazue, O.-M., Kazuyo, T., Koh, M. and Tatsuya, I., 2005, Effects of partial humid heat exposure during different segments of sleep on human sleep stages and body temperature, Physiology & Behavior 83, pp.759-765 https://doi.org/10.1016/j.physbeh.2004.09.009
  3. Rechtschaffen, A. and Kales, A., 1968, A manual of standardized terminology techniques and scoring systems for sleep stages of human subjects, Los Angeles Brain Information Service/Brain Research Institute, UCLA
  4. Armitage, R., 1995, The distribution of EEG frequencies in REM and NREM sleep stages in healthy young adults, Sleep, Vol. 18(5), pp. 334-341 https://doi.org/10.1093/sleep/18.5.334
  5. Knab, D. and Engle-Sittenfeld, P., 1983, The many facets of poor sleep, Neuropsychobiology, 10, pp. 141-147 https://doi.org/10.1159/000118001
  6. Kim, D. G., Kum, J. S. and Park, J. I., 2006, Evaluation of thermal comfort during sleeping in summer, Korean Jounal of Air-Conditioning and Refrigeration Engineering, Vol. 18, No.1, pp. 1-6
  7. Haskell, E. H. and Palca, J. W., 1981, The effects of high and low ambient temperature on human sleep, Electroencephalography and Clinical Neurophysiology, pp.494-501
  8. Hiroyuki, O., Yayoi, N., Akio, T., Teruo, Y. and Katsumi, I., 1987, The effects of the temperature of the bed upon sleep (Part 2), The Eleventh Symposium on Man-Thermal Environment System, pp. 10-13
  9. Rohles, F. H., 1983, New directions in comfort research, ASHRAE Trans. DC-83-11, No.3, pp. 634-646
  10. McCullough, E. A., Jones, B. W. and Huck, J., 1985, A comprehensive data base for estmating cloth insulation, ASHRAE Transaction, Vol. 91, Part 1, pp. 29-47