1134925
doi
10.5281/zenodo.1134925
oai:zenodo.org:1134925
user-eu
Vendra C. Madhav Rao
University of Warwick, Coventry, UK
Jennifer X. Wen
University of Warwick, Coventry, UK
Evaluation of Engineering Models for Vented Lean Hydrogen Deflagrations
Anubhav Sinha
University of Warwick, Coventry, UK
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Engineering Models, Vented deflagrations, Hydrogen, HySEA project
<p>Hydrogen gas produced from the renewable energy source can be the prefect future energy carrier. It will not only reduce the demands for depleting hydrocarbons fuels but will also help in reducing the greenhouse gas emissions. The 20-ft ISO standard containers are widely considered for building self-contained portable fuel cell based power generation units. Safety analysis of these installations is essential to prevent any future catastrophic accidents. The present paper evaluates existing engineering models to predict vented explosion peak overpressures in case of an accident release of hydrogen in these container. Such predictions are required in the design of venting panels, which are commonly used to prevent damage to enclosures by reducing overpressure of combusting gases.<br>
Although various engineering models and empirical correlations have been developed, a number of which have been included in engineering standards and guidelines [4-7]. These correlations, however, often have conflicting recommendations [3]. None of the engineering models in the public domain have been validated with vented hydrogen tests data in realistic configurations, such as ISO shipping containers, used in hydrogen energy applications. Evaluating/improving these engineering models with the aid of full scale experimental data and computational fluid dynamics (CFD) based numerical modelling is a main objective of the HySEA project supported by the Fuel Cells and Hydrogen 2 Joint Undertaking (FCH 2 JU) under the Horizon 2020 Framework Program for Research and Innovation.<br>
The present study aims to assess capabilities of existing engineering models for vented deflagrations of lean hydrogen-air mixtures. As hydrogen has much higher flame speeds than hydrocarbon fuels like methane and propane, it is not possible to use models derived for hydrocarbons directly with hydrogen flames. The leaner flames of hydrogen are also susceptible to instabilities like Darius-Landau instability, Rayleigh-Taylor instability, which are often overlooked in the derivation of engineering models.</p>
Zenodo
2017-08-04
info:eu-repo/semantics/conferencePaper
1134924
user-eu
award_title=Improving Hydrogen Safety for Energy Applications (HySEA) through pre-normative research on vented deflagrations; award_number=671461; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/671461; funder_id=00k4n6c32; funder_name=European Commission;
1579537499.677649
444323
md5:72fb8134cf71adf9b89b5d545bbbae69
https://zenodo.org/records/1134925/files/26th ICDERS_submission_1111.pdf
public
10.5281/zenodo.1134924
isVersionOf
doi