Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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Numerical Study on Air Egress Velocity in Vestibule Pressurization System : Damper Locationfor Uniform Air Egress Velocity in the case of Two Fire Doors

부속실 가압 시스템의 방연풍속에 관한 수치해석적 연구: 2개 출입문이 존재할 경우 균일한 방연풍속을 얻기 위한 댐퍼 위치 선정방법

  • Seo, Chanwon (Department of Mechanical Engineering, Chungnam National University) ;
  • Shin, Weon Gyu (Department of Mechanical Engineering, Chungnam National University)
  • Received : 2014.08.06
  • Accepted : 2014.09.12
  • Published : 2014.12.31
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Abstract

Vestibule pressurization system should produce uniform air egress velocity to prevent the intrusion of smoke into escape route when fire accidents occur inside a building and fire doors are open for evacuation of people. Air supplying units in the vestibule need to be arranged by taking account of the location of doors and the volume of the vestibule. In this study, computational fluid dynamics (CFD) simulations were conducted for the vestibule where two doors are installed varying the location of a damper and louver angle. From simulations, we found that when the damper in the vestibule is located at the center of the wall opposite to two fire doors, the uniform air egress velocity can be obtained.

부속실 가압시스템의 가장 중요한 역할은 건축물 내부에 화재가 발생 시 피난을 위하여 방화문이 개방 될 경우 균일한 방연풍속을 형성하여 연기의 침입을 방지하는 것이다. 이러한 설비의 성능확보를 위하여 균일한 방연풍속이 형성될 수 있도록 공기 공급 유니트를 배치하는 것이 중요하다. 본 연구에서는 대형건물에 설치되는 2개의 출입문을 갖는 부속실의 경우, 방연풍속이 균일하게 형성될 수 있는지 수치해석을 수행하였고, 나타난 문제점을 해결하기 위한 주요변수로 댐퍼의 위치 및 루버의 각도를 선정하고, 두 변수를 조정하여 균일한 방연풍속을 얻을 수 있는 해결책을 찾아보았다. 그 결과, 부속실의 댐퍼 위치의 중요성을 확인하였으며, 2개의 방화문이 존재할 경우 출입문 맞은편 중간 벽에 배치할 경우 성능에 있어서 좋은 결과를 얻을 수 있었다.

Keywords

References

  1. National Fire Safety Code 501A, National Emergency Management Agency (2013).
  2. S. H. Ryu, S. K. Lee, D. H. Hong and K. R. Choi, "Characteristics of Air Egress Velocity in Vestibule Pressurization System Using the Fire Dynamics Simulator", Fire Science and Engineering, Vol. 24, No. 6, pp. 153-159 (2010).
  3. J. Y. Kim, D. H. Lee and H. Y. Kim, "Numerical Analysis on Features of Airflow through Open Door in Pressure Differential System", Proceedings of 2008 Winter Annual Conference, The Society of Air-conditioning and Refrigerating Engineers of Korea, pp. 463-468 (2008).
  4. C. W. Lee, H. J. Kim, Y. K. Choi, M. C. Youm and H. S. Ryou, "A Study on the Conditions of Injection Pressurization in the Smoke-Control Zone II. Analysis of the Conditions for Closing Force of Fire Door with Variation of Angular Velocity", Fire Science and Engineering, Vol. 27, No. 2, pp. 6-10 (2013). https://doi.org/10.7731/KIFSE.2013.27.2.006
  5. H. Huang, R. Ooka, H. Chen and S. Kato, "Optimum Design for Smoke-Control System in Buildings Considering Robustness Using CFD and Genetic Algorithms", Building and Environment, Vol. 44, No. 11, pp. 2218-2227 (2009). https://doi.org/10.1016/j.buildenv.2009.02.002
  6. C. Seo and W. G. Shin, "Numerical Study on Air Egress Velocity in Vestibule Pressurization System : Characteristics of Air Flow in the Vestibule with Multiple Fire Doors in an Apartment Building", Fire Science and Engineering, Vol. 28, No. 5, pp. 30-36 (2014). https://doi.org/10.7731/KIFSE.2014.28.5.030
  7. M. Son, H. Park, M. Park, J. Wang and W. G. Shin, "Silver Nanowire Penetration through Screen Filter", Aerosol Science and Technology, Vol. 48, No. 5, pp. 480-488 (2014). https://doi.org/10.1080/02786826.2014.890280
  8. ANSYS Co., "ANSYS Ver.15.0" (2013).
  9. J. Y. Kim and H. J. Shin, "Numerical Analysis on Pressurization System of Smoke Control in Consideration of Flow Rate of Supply and Leakage", Fire Science and Engineering, Vol. 24, No. 5, pp. 87-93 (2010).