A Study of Smoke Exhaust Rate for the Transverse Ventilation with Oversized Exhaust Ports in Road Tunnel

횡류식 대배기구 방식을 적용한 도로터널에서 화재시 최적배연풍량 선정에 관한 연구

  • Yoo, Ji-Oh (Department of Building Mechanical Engineering, Shinheung college) ;
  • Yoon, Sung-Wook (GS Engineering & Construction) ;
  • Rie, Dong-Ho (Department of Safety Engineering, University of Incheon)
  • Published : 2006.08.31

Abstract

Recently, the application of transverse ventilation system with oversized exhaust ports has been increased in bidirectional road tunnel in order to improve smoke exhaust ability. Therefore, in this study, for decision of the optimal smoke exhaust rates in the transverse ventilation system, several standards of nations are compared and numerical simulations with variations of exhaust flow rates are carried out in terms of smoke spread distance by FDS ver. 3.1. As results, in the case of no internal longitudinal air velocity in tunnel, the smoke exhaust rate of $80m^{3}/s$ (the smoke generation rate at HRR of 20MW) is sufficient enough to limit the smoke spread within 250m in 6 minutes after the fire. However, in the case of the internal longitudinal air velocity at 2.5m/s, the smoke exhaust rate should be increased $130m^{3}/s$.

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