Skip to main content

Buoyancy-driven ventilation of hydrogen from buildings: Laboratory test and model validation

Type of Publication
Year of Publication
2009
Authors

C.D. Barley; K. Gawlik

Abstract

Hydrogen gas leaking from a hydrogen-powered vehicle in a residential garage may form a flammable mixture with air. Passive, buoyancy-driven ventilation is one approach to limiting the concentration to a safe level. We explored the relationship between leak rate, ventilation design, and hydrogen concentration through laboratory testing, an algebraic analysis, and CFD modeling. We used helium to test slow, steady, low-velocity leaks in a full-scale test room under nearly isothermal, steady conditions, and we report the results in sufficient detail that other modelers can use them. The results show the importance and variability of stratification. Our algebraic and CFD models agree very well with the experimental results. We describe our CFD approach in sufficient detail for use by others. We tested under nearly isothermal conditions, but also discuss indoor-outdoor temperature difference as an important risk factor. Information about realistic leakage scenarios is needed to apply these results as safety recommendations. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

DOI

10.1016/j.ijhydene.2009.04.078

Volume

34

Notes

Times Cited: 18 Post, Matthew/J-7528-2013 Post, Matthew/0000-0002-2855-8394 18

Pagination

5592-5603

Number
13
ISSN Number

0360-3199

We are professional and reliable provider since we offer customers the most powerful and beautiful themes. Besides, we always catch the latest technology and adapt to follow world’s new trends to deliver the best themes to the market.

Contact info

We are the leaders in the building industries and factories. We're word wide. We never give up on the challenges.

Recent Posts