Abstract
This research has investigated physical variables affecting indoor thermal comfort and subjective responses of thermal comfort of students in a university in Korea in which the weather is oceanic temperate climate, and has been performed to contribute to the research fields of Sustainable Thermal Standard and Adaptive Thermal Comfort (ATC). This research is based on the ISO 7730-2005 standard and the ATC theories and 4 main variables of PMV such as dry bulb temperature (Ta), relative humidity (RH), black bulb temperature (Tg), and air velocity (Va) are measured once a week during two regular semesters. A clothing insulation, a thermal sensation vote (TSV), an acceptability of thermal environment, and a preference for cooling and heating are investigated at the same time using a questionnaire. This study was carried out for 26 weeks during the spring season, from March to June 2009, and the autumn season, from September to December 2009. The main achievements of this study are as follows. Monthly Mean Outdoor Temperature (MMOT) and Operative Temperature (OT) in the classroom during research periods are 7.4∼23.3°C and 17.5∼29.0°C, respectively. The acceptability ratio of thermal environment shows over 80% when the range of OT in the classroom is 17∼25°C, and the range can be applicable to operative index of heating and cooling of classroom. The mean TSV of respondents is almost “neutral (0)” when the PMV in the classroom moves to “neutral (0)” and “slightly cool (−1)”, and the TSV is almost “+1.5” when the PMV moves to “slightly warm (+1)”. The acceptability ratio of thermal environment is slightly different from ASHRAE Standard 55-2004. So it is necessary to more investigate standard range of acceptability of thermal environment in oceanic temperate climate region using much more databases.
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This paper was recommended for publication in revised form by Associate Editor Ji Hwan Jeong
Gun Joo Jung received his B.S degree in Architectural Engineering from Pukyong National University, Busan, Korea, in 1997, and Ph.D. in 2005. Currently he is an assistant professor of Division of Architecture at the same university. His primary research interest is Building Environment and Energy.
Sung Ki Song received his B.Eng. degree in Department of Refrigeration Engineering from National Fisheries University of Pusan, Busan, Korea, in 1995, and received Ph.D. in Architecture and Civil Engineering from Waseda University, Tokyo, Japan, in 2003. Currently he is an associate professor of Department of Environmental Design, Hiroshima Institute of Technology. His primary research interest is Building Environment and Building Energy Service Facility.
Young Chull Ahn received his B.S degree in School of Mechanical Engineering from Pusan National University, Busan, Korea, in 1996, and Ph.D. in 2004. Currently he is an associate professor of Department of Architectural Engineering at the same university. His primary research interest is HVAC system and Renewable Energy.
Geun Sug Oh received her B.S. degree in Division of Architecture from Pukyong National University, Busan, Korea, in 2004. She is now studying in the doctoral program at the Architectural Engineering at the same institution. Her main research interest is Indoor Air Quality and Building Energy.
Young Bin Im received his B.S degree in Architectural Engineering from Dong-A University, Busan, Korea, in 1973, and Ph.D. in 1997. Currently he is a professor of Division of Architecture at the Pukyong National University, Busan, Korea. His primary research interest is Building Energy and Architectural Acoustic.
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Jung, G.J., Song, S.K., Ahn, Y.C. et al. Experimental research on thermal comfort in the university classroom of regular semesters in Korea. J Mech Sci Technol 25, 503–512 (2011). https://doi.org/10.1007/s12206-010-1219-1
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DOI: https://doi.org/10.1007/s12206-010-1219-1