고층건축물의 높이에 따른 대류열전달률이 실내표면결로에 미치는 영향에 관한 이론적 연구

Abstract

Although the temperature coefficient between outdoor air temperature and indoor air temperature is used to determine whether condensation occurs, it is reasonable to predict surface condensation using the surface temperature difference between outdoor and indoor. This study is conducted to determine whether condensation occurs by not using the air temperature difference between indoor and outdoor (the existing methods) but by applying the surface temperature difference between indoor and outdoor surfaces. The outdoor surface temperature is affected by air velocity on the building height, thus the convection heat transfer coefficient is different depending on the building height. The indoor surface temperature distribution is 21.4℃～21.5℃ when the existing equation is applied. But by applying the proposed equation, the indoor surface temperature distribution for the lower floor is 13.0～17.8℃, for the middle floor is 12.3℃～ 17.1℃, and for the top floor is 12.0℃～16.8℃. As the indoor surface temperature can be lower than indoor air dew point temperature, surface condensation is possible.