• Title/Summary/Keyword: Smoke propagation

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Experimental Study on the Designed Ventilation System Performance at Rescue Station in Tunnel Fire (터널 내 화재발생시 구난역 내의 설계된 환기 시스템 성능에 대한 실험적 연구)

  • Kim, Dong-Woon;Lee, Seong-Hyeok;Ryou, Hong-Sun;Yoon, Sung-Wook
    • Journal of the Korean Society for Railway
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    • v.12 no.1
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    • pp.9-15
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    • 2009
  • In this study, the l/35 reduced-scale model experiment were conducted to investigate designed ventilation system performance at rescue station in tunnel fire. A model tunnel with 2 mm thick of steel, 10 m long, 0.19 m high and 0.26m was made by using Froude number scaling law. The cross-passages installing escape door at the center. were connected between accident tunnel and rescue tunnel. The n-heptane pool fire, $4cm\times4cm$, with heat release rate 698.97W were used as fire source. The fire source was located in the center and portal of accident tunnel as Worst case.. An operating ventilation system extracted smoke amount of 0.015 cms. The smoke temperature and carbon monoxide. concentration in cross-passage were measured to verify designed ventilation system. The results showed that, in center fire case without ventilation in accident tunnel, smoke did not propagated to rescue station. In portal tire case, smoke spreaded to rescue station without ventilation. But smoke did not propagated to rescue station with designed ventilation.

A Numerical Analysis Study on the Influence of the Fire Protection System on Evacuation Safety in Apartment Houses (공동주택 건축물 내 화재방호시스템이 피난안전성에 미치는 영향에 대한 수치해석적 연구)

  • Kim, Hak Kyung;Choi, Doo Chan;Lee, Doo Hee;Hwang, Hyun Soo;Kim, Hee Moon
    • Journal of the Society of Disaster Information
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    • v.18 no.1
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    • pp.38-50
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    • 2022
  • Purpose: The goal of this research is to create a numerical analytic database that may assist fire prevention managers and building officials in prioritizing items that need to be addressed in order to improve evacuation safety performance while working within a constrained budget and time frame. Method: It was carried out utilizing the CFD Tool, a quantitative evaluation approach, to assess evacuation safety. One direct staircase-type apartment houses and one corridor-type apartment were chosen to make it. Result: In the fire compartment category, Apartment A's evacuation time was around 130 percent longer than that of sprinkler facilities. Conclusion: Fire prevention managers and building officials feel that starting with a single level and implementing "dwelling unit separations" will increase evacuation safety, and that maintaining fire compartments and sprinkler systems at all times will be effective. Because of the limited characteristics of smoke propagation in corridor-type apartments compared to direct staircase-type flats, it is thought that fire extinguishing equipment should be addressed.