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Reports Summarize Hydrogen Energy Findings from University of Ulster (Numerical Validation of Pressure Peaking From an Ignited Hydrogen Release In a Laboratory-scale Enclosure and Application To a Garage Scenario)

Energy Daily News

2019 MAY 24 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- Data detailed on Energy - Hydrogen Energy have been presented. According to news reporting out of Newtownabbey, United Kingdom, by NewsRx editors, research stated, “This work focuses on the overpressures arising from the rapid ignited release of hydrogen in an enclosure, specifically the peak in overpressure that may result in the initial period of the release, dependent on the level of ventilation. Two volumes are considered: a 1 m(3) laboratory scale enclosure for which experimental data exists, and a real scale residential garage.”

Our news journalists obtained a quote from the research from the University of Ulster, “Various vent configurations are considered for each scenario for leak rates typical of those from a fuel cell (laboratory scale enclosure) and from onboard hydrogen storage tanks through a thermally activated pressure relief device (TPRD) in the garage-like enclosure. A validation study has been performed for the laboratory scale enclosure and the modelling approach which gives optimum results has been identified. The influence of heat transfer on the pressure peak has been highlighted, particularly, the importance of radiation in predicting the pressure peak. The validated modelling approach has been applied to a range of experiments and garage scenarios. Both the laboratory and real scale simulations demonstrate the complex relationship between vent size and release rate and indicate the significant overpressures that can result through pressure peaking following an ignited release in an enclosure. The magnitude of the pressure peak as a result of an ignited release has been found to be two orders of magnitude greater than that for the corresponding unignited release. The work indicates that TPRDs currently available for hydrogen-powered vehicles may result in a dangerous situation for the specific scenario considered which should be accounted for in regulations, codes and standards.”

According to the news editors, the research concluded: “The application of this work extends beyond TPRDs and is relevant where there is a rapid, ignited release of hydrogen in an enclosure with ventilation.”

For more information on this research see: Numerical Validation of Pressure Peaking From an Ignited Hydrogen Release In a Laboratory-scale Enclosure and Application To a Garage Scenario. International Journal of Hydrogen Energy, 2018;43(37):17954-17968. International Journal of Hydrogen Energy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier -; International Journal of Hydrogen Energy -

Our news journalists report that additional information may be obtained by contacting S. Brennan, University of Ulster, Belfast Sch Architecture & Built Environm, HySAFER, Newtownabbey BT37 0QB, United Kingdom. Additional authors for this research include H.G. Hussein, V. Shentsov, D. Makarov and V. Molkov.

The direct object identifier (DOI) for that additional information is: This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.


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