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http://dx.doi.org/10.7316/KHNES.2012.23.6.588

A Numerical Analysis of Hydrogen Diffusion for Hydrogen Leakage from a Fuel Cell Vehicle in a Long Road Tunnel  

Choi, Jongrak (Dept. of Mechanical Engineering, Sogang Univ.)
Hur, Nahmkeon (Dept. of Mechanical Engineering, Sogang Univ.)
Lee, Moonkyu (Sogang Institute Advanced Technology, Sogang Univ.)
Chang, Hyungjin (KOTSA, Korea Automobile Testing & Research Institute)
Lee, Kwangbum (KOTSA, Korea Automobile Testing & Research Institute)
Yong, Geejoong (KOTSA, Korea Automobile Testing & Research Institute)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.23, no.6, 2012 , pp. 588-597 More about this Journal
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.
Keywords
Hydrogen leakage; Long road tunnel; Ventilation facility; Computational Fluid Dynamics;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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