지하 다중이용업소의 배연 효과에 관한 수치적 연구

Abstract

In order to figure out the effect of smoke extraction of underground multiple use facilities, fire simulation was performed by FDS targeting underground bar. Here are some conclusions that variations of temperature, carbon monoxide, visibility, smoke distribution were compared according to the change of the size of fires. 1) When smoke was not extracted on Case 1 and Case 2, it was spreaded quickly to main stairs and emergency stairs. After 60 seconds, the view was obscured by smoke in the whole basements. Smoke was delayed when the extraction happened, the view was secured in main stairs. 2) In case of Case 1 and Case 2, temperature and concentrations of carbon monoxide were very little change when extraction. Visibility was only 5.3 meters and 1.5 meters depending on the size of fire in emergency stairs. It was not affected in main stairs because smoke was emitted. The reason is walking distances from the fire room to main stairs and emergency stairs were 2.0m, 1.0m, respectively. Therefore, each room would be required to have each evacuation according to the change of fire location. 3) In the research of existence of smoke Reservoir Screen on case 3, the changes of temperature, carbon monoxide, visibility, smoke distribution were less effective. In this study, smoke reservoir screen couldn't work its function. 4) The effect of smoke extraction on basements, it could help occupants to have evacuation time. As a result, it is considered to install smoke extraction system and plan to evacuate for multi-purposed facility fire