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천장형 냉방기를 이용한 교실의 온열환경 개선에 관한 연구
황정하(Jung-ha Hwang),이용호(Yong-ho Lee),윤준진(Jun-Jin Yun) 한국생활환경학회 2006 한국생활환경학회지 Vol.13 No.1
The purpose of this study is to deduce the optimal operating plan for the classroom ceiling air conditioning system based on air supply variables at the time of cooling operation. To carry out this objective, measuring experiment and computational fluid dynamics (CFD) were performed with variables including supply air temperature, air supply volume and air supply angle of a ceiling air conditioning system. Based on a comparison of the results, classroom temperature and velocity distribution are analyzed, so the air volume distribution can be improved according to the heat generating load of the occupants. Ultimately, through the evaluation and analysis of the occupants' Predicted Mean Vote (PMV), an optimal operating plan for the summer is proposed. Room temperature and velocity distribution stayed in the most stable condition at the temperature setting of 26°C, air supply volume of 4320CMH, and air supply angle of 30°, With regard to the improvement plans based on the occupants' heat generating load, the air supply volume is reduced in the less populated front area, and raised in the more populated right and left sides of the room. Among the proposed improvement plans [ALT-3] in which the air supply volume is reduced by 40% in the front area and 20% at the south and north, exhibited the least difference in room temperature. The occupants' PMV stayed in the comfortable zone ± 1, and the occupants feel comfortable in the range of ±0.5 throughout the entire room.
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