Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 38, Issue 19, Pages 8084-8091Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.02.018
Keywords
Hydrogen leakage; Hydrogen dispersion; FCV (fuel cell vehicle); Flammable region; Forced ventilation; CFD (computational fluid dynamics)
Categories
Funding
- Transportation System Innovation Program [07-Transport System-Furture-02]
- Ministry of Land, Transport and Maritime Affairs, Republic of Korea
- National Research Foundation of Korea (NRF) grant [20090083510]
- Korean government (MEST) through Multi-phenomena CFD Engineering Research Center
- Korea Agency for Infrastructure Technology Advancement (KAIA) [44969] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0083510] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In the present study, the dispersion process of hydrogen leaking from an FCV (Fuel Cell Vehicle) in an underground parking garage is analyzed with numerical simulations in order to assess hazards and associated risks of a leakage accident. The temporal and spatial evolution of the hydrogen concentration as well as the flammable region in the parking garage was predicted numerically. The volume of the flammable region shows a non-linear growth in time with a latency period. The effects of the leakage flow rate and an additional ventilation fan were investigated to evaluate the ventilation performance to relieve accumulation of the hydrogen gas. It is found that expansion of the flammable region is delayed by the fan via enhanced mixing near the boundary of the flammable region. The present numerical results can be useful to analyze safety issues in automotive applications of hydrogen. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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