Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Numerical Study on the Definition of the Exhaust Effectiveness of Smoke under Fire in a Large Space

대공간 화재시 배연효율 정의에 관한 수치해석적 연구

  • Kim, Jung-Yup (Korea Institute of Civil Engineering and Building Technology) ;
  • Jang, Kyung Jin (Energy Technology Education Center, Kookmin University) ;
  • Han, Hwataik (Department of Mechanical Engineering, Kookmin University)
  • 김정엽 (한국건설기술연구원) ;
  • 장경진 (국민대학교 에너지인력양성센터) ;
  • 한화택 (국민대학교 기계시스템공학부)
  • Received : 2014.08.19
  • Accepted : 2014.10.10
  • Published : 2014.11.10
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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.

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References

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