Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Numerical Analysis of Hydrogen Diffusion for Hydrogen Leakage from a Fuel Cell Vehicle in a Long Road Tunnel

장대터널에서 수소연료전지 차량의 수소 누출에 대한 수소 거동의 수치해석 연구

  • 최종락 (서강대학교 기계공학과) ;
  • 허남건 (서강대학교 기계공학과) ;
  • 이문규 (서강대학교 서강미래기술연구원) ;
  • 장형진 (교통안전공단 자동차안전연구원) ;
  • 이광범 (교통안전공단 자동차안전연구원) ;
  • 용기중 (교통안전공단 자동차안전연구원)
  • Received : 2012.12.05
  • Accepted : 2012.12.31
  • Published : 2012.12.31
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Abstract

In the present study, the dispersion characteristics of hydrogen leakage from a Fuel Cell Vehicle (FCV) were analyzed by numerical simulation in order to assess the risk of a hydrogen leakage incident in a long road tunnel. In order to implement the worst case of hydrogen leakage, the FCV was located at the center of a tunnel, and hydrogen was completely discharged within 63 seconds. The Leakage velocity of hydrogen was adopted sub-sonic speed because that the assumption of the blockage effect of secondary device inside a vehicle. The temporal and spatial evaluation of the hydrogen concentration as well as the flammable region in a road tunnel was reported according to change of ventilation operating conditions. The hydrogen was blended by supply air form a ventilation fan, however, the hydrogen was discharged to outside in the exhaust air. It is observed that the efficiency way to eliminate of hydrogen is supply air operating condition under the hazardous hydrogen leaking incident. The present numerical analysis can be provided useful information of ventilation under the hydrogen leaking situation.

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References

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