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IA-HySafe Standard benchmark exercise SBEP-V21: Hydrogen release and accumulation within a non-ventilated ambient pressure garage at low release rates.

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CONTENTS

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  1. IA-HySafe Standard benchmark exercise SBEP-V21: Hydrogen release and accumulation within a non-ventilated ambient pressure garage at low release rates A.G.Venetsanos1, I. Tolias1, D. Baraldi7, S. Benz5, B. Cariteau2, J. Garcia3, O.R. Hansen4, C. Jäkel6, S. Ledin8, P. Middha4, E.A. Papanikolaou7 1 Environmental Research Laboratory, National Centre for Scientific Research Demokritos (NCSRD), 15310 Aghia Paraskevi, Attikis, Greece, venets@ipta.demokritos.gr 2 C.E.A. Saclay, D.E.N., D.M.2S., S.F.M.E., Laboratoire d’Etude Expérimentale des Fluides, 91191 Gif/Yvette cedex FRANCE 3 Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (UPM), José Gutiérrez Abascal, 2, E-28006 Madrid, Spain 4 GEXCON AS, Fantoftvegen 38 Box 6015 Postterminalen N-5892 BERGEN Norway 5IKET, KIT, Postfach 3640, 76021 Karlsruhe, Germany 6Forschungszentrum Juelich (FZJ), 52425 Juelich, Germany 7 Joint Research Centre of the European Commission (JRC), Institute for Energy, 1755 ZG Petten, The Netherlands 8 Health and Safety Laboratory (HSL), Harpur Hill, Buxton, Derbyshire, SK17 9JN, UK

  2. CONTENTS • Introduction & Scope • Description of CEA Garage Test 5 • Modelling strategy • Results & discussion • Conclusions

  3. Intro & Scope • The Research Committee activities of IA-HySafe include: • the continuation of SBEPs first introduced within HySafe EC-NoE • SBEPs to • validate, inter-compare and further develop existing Computational Fluid Dynamics (CFD) codes and models in predicting hydrogen related release, dispersion and combustion phenomena • Focus in the present work: • Understanding and prediction of the dispersion / accumulation of hydrogen releases in confined spaces under low release conditions

  4. CEA Garage Test-5 Re = 115

  5. Modelling strategy

  6. Results – Mass balance

  7. Results – CPU times

  8. Results - Concentrations

  9. Results - Concentrations P1N3, z = 2.37 m

  10. Results - Concentrations P1N2, z = 2.135 m

  11. Results - Concentrations P1N1, z = 1.9 m

  12. Results - Concentrations M1N5, z = 1.575 m

  13. Results - Concentrations M1N4, z = 1.26 m

  14. Results - Concentrations M1N3, z = 0.945 m

  15. Results - Concentrations M1N2, z = 0.63 m

  16. Results - Concentrations M1N1, z = 0.315 m

  17. CONCLUSIONS • Relatively good predictions of He concentrations • Significant reduction in CPU time with low Mach number solvers • Significant effect of extending the computational domain far enough beyond the confined space opening.

  18. THANK YOU FOR YOUR ATTENTION ANY QUESTIONS

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