The Study on Indoor Thermal Environment during Convection Heating - Thermal Comfort Sensation for Vertical Temperature Differences -

대류 난방시 실내열환경에 관한 연구 -상하온도차에 대한 온열쾌적감-

Kim Dong-Gyu;Kum Jong-Soo

  • Published : 2005.02.01


Thermal neutrality is not enough to achieve thermal comfort. The temperature level can be the optimal, and still people may complain. This situation is often explained by the problem of local discomfort. Local discomfort can be caused by radiant asymmetry, local air velocities, too warm and too cold floor temperature and vertical temperature difference. This temperature difference may generate thermal discomfort due to different thermal sensation in different body parts. Therefore, thermal comfort can not be correctly evaluated without considering these differences. This study investigates thermal discomfort sensations of different body parts and its effect on overall thermal sensation and comfort in air-heating room. Experimental results of evaluating thermal discomfort at different body parts in an air-heating room showed that thermal sensation on the shoulder was significantly related to the overall thermal sensation and discomfort. Although it is known that cool-head, warm-foot condition is good for comfort living, cool temperature around the head generated discomfort.


TSV;CSV;HRV;LF;HF;ECG;Vertical temperature difference


  1. Kazuaki, B., 1990, The effects of vertical air temperature differences on thermal comfort and physiological responses, Journal of Archit. Plan. Engineering, AIJ, 417, 154-162
  2. Kim, D. G., 1998, Studies on thermal comfort evaluation and corrections of comfort indices for koreans, Ph.D. thesis, Pukyong National University, Pusan, Korea, 14-52pp
  3. Bootsman, M., C. A. Swenne and H. Van. Bruschke, 1994, Heart rate and Heart rate variability as indexes of sympathovagal balance, Am. J. Physiol., 226, 1565-1571
  4. Lee, K. H., J S. Kum, D. G. Kim, G. S. Lee, H. C. Kim and J. J. Lim, 2000, Comparisions of Thermal Comfort Sensation at Different Body Parts for Temperature Differences during AirHeating, 5th International Congress on Physiological Anthropology, 15-18pp
  5. Kim, D. G, D. S. Bae, J. S. Kum, K. W. Choi, S. I. Kim, K. S. Im and K H. Lee, 1998, Experimental study on thermal comfort sensation and physiological response of Koreans in various thermal conditions, Part 3: The effects of vertical air temperature difference in a room, Korean society for emotion and sensibility conference, 264-269pp
  6. 강두희, 1992, 생리학 개정 4판, 신광출판사, 12.1-12.12