| Title |
Numerical Study on the Definition of the Exhaust Effectiveness of Smoke under Fire in a Large Space |
| Authors |
김정엽(Jung-Yup Kim) ; 장경진(Kyung Jin Jang) ; 한화택(Hwataik Han) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.11.535 |
| Keywords |
화재 ; 연기 ; 배연효율 ; 추적가스 ; 여명 ; 수치해석 Fire ; Smoke ; Exhaust effectiveness ; Tracer gas ; Residual life time ; Numerical analysis |
| Abstract |
This paper investigates the exhaust effectiveness of smoke, in the case of fire in a large atrium space. Numerical analysis was conducted to simulate transient fire growth in a test room, modeled by the Murcia atrium fire test. Various indices representing the exhaust performance of the exhaust system were obtained, such as the height of the smoke layer, and the instantaneous and accumulative capture efficiency of the smoke. The residual life time of smoke from the fire was also obtained, by injecting tracer gases at the fire location, depending on the airflow rate, and the location of the exhausts. The capture efficiency based on smoke concentration at the exhausts exhibits how much smoke can be removed by the exhaust system; whereas, the exhaust effectiveness based on residual life time indicates how rapidly the smoke can reach the exhaust locations, before being exhausted. The definitions and meanings of the indices to be used in representing the exhaust performance of a smoke exhaust system installed in a large space are discussed. |