Presentation is loading. Please wait.

Presentation is loading. Please wait.

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

Published byClyde Harvey Horn Modified over 6 years ago

Similar presentations

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

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), Aghia Paraskevi, Attikis, Greece, 2 C.E.A. Saclay, D.E.N., D.M.2S., S.F.M.E., Laboratoire d’Etude Expérimentale des Fluides, Gif/Yvette cedex FRANCE 3 Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (UPM), José Gutiérrez Abascal, 2, E Madrid, Spain 4 GEXCON AS, Fantoftvegen 38 Box 6015 Postterminalen N-5892 BERGEN Norway 5 IKET, KIT, Postfach 3640, Karlsruhe, Germany 6 Forschungszentrum Juelich (FZJ), 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 Garage x-dimension (mm) 5760
Garage y-dimension (mm) 2960 Garage z-dimension (mm) 2420 x release (mm) -2880 y release (mm) 1480 z release (mm) 220 Exit diameter (mm) 29,7 Volumetric flow rate - STP (NL/min) 18 He mass flow rate (g/s) 0,054 Garage Temperature T (°C) 24,1 Exit velocity (m/s) 0,47 Release Direction Upwards Release Type Continuous Release duration (s) 3740 Released volume - STP (NL) 1122 He released mass (gr) 200,28 Target concentration (%) 2,94% Total measurement time (s) 90440 Re = 115

5 Number of computational cells Molecular diffusivity (m2/s×10-5)
Modelling strategy Participant/ Code Turbulence model Number of computational cells Convective terms Transient terms Vent model Molecular diffusivity (m2/s×10-5) FZJ/CFX SAS-SST (half garage) 2nd order 2nd order backwards Euler Opening 8.0 GEXCON/ FLACS k-ε Release: 30888 Diffusion: 4560 2.0 GEXCON_revised/ Release: 44352 Diffusion: 7200 Extension HSL/CFX SST 88840 High resolution scheme (2nd order) 1.86 JRC/CFX Laminar Release: Diffusion: 70429 Outside: 5173 2 m × 3 m × 3 m extension 11.7 KIT/ GASFLOW 58905 Upwind 1rst order ALE scheme 7.5 NCSRD/ ADREA-HF 53760 Outside: 3360 SMART 3rd order 1rst order fully implicit 1 m × 2.96 m × 2.42 m extension 5.65 UPM/ FLUENT 125516 UPM_revised/ -

6 Results – Mass balance

7 Results – CPU times Compressibility Simulated period (s) Threads
Participant/ Code Compressibility Simulated period (s) CPU time Threads Computer type FZJ/CFX Fully compressible 20000 s 15d, 21h 3 Intel i7 860 CPU GEXCON/ FLACS Low Mach s 1d 1 Linux-PC, Intel Xeon W3550, 3.07 GHz GEXCON_revised/ 5.5h 4 Quad core HSL/CFX 15000 s (coarse mesh) s (fine) 18d, 5h (coarse) 19d, 15h (fine) 2 Windows XP SP3 64-bit, 2 Intel Xeon JRC/CFX 15000 s 9d, 20h 8 3.25 GHz KIT/ GASFLOW 20000 2d, 15h Suse Linux 11.2, i7-950, 3.06GHz NCSRD/ ADREA-HF 7080 10d Windows 7, i7 M620 CPU at 2.67 GHz UPM/ FLUENT 13d Windows 7, 2 Intel Xeon Quad Core CPUs at 2.4 GHz

8 Results - Concentrations
Sensor name z (mm) P1N3 2370 P1N2 2135 P1N1 1900 M1N5 1575 M1N4 1260 M1N3 945 M1N2 630 M1N1 315

9 Results - Concentrations
P1N3, z = 2.37 m

10 Results - Concentrations
P1N2, z = m

11 Results - Concentrations
P1N1, z = 1.9 m

12 Results - Concentrations
M1N5, z = m

13 Results - Concentrations
M1N4, z = 1.26 m

14 Results - Concentrations
M1N3, z = m

15 Results - Concentrations
M1N2, z = 0.63 m

16 Results - Concentrations
M1N1, z = 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

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

Similar presentations

ICHS-4, 12-15 Sept. 2011, San Francisco, USA A.G.Venetsanos 1, I. Tolias 1, D. Baraldi 7, S. Benz 5, B. Cariteau 2, J. Garcia 3, O.R. Hansen 4, C. Jäkel.

ICHS-4, Sept. 2011, San Francisco, USA A.G.Venetsanos 1, I. Tolias 1, D. Baraldi 7, S. Benz 5, B. Cariteau 2, J. Garcia 3, O.R. Hansen 4, C. Jäkel.
Phoenics User Conference on CFD May 2004 Vipac Engineers & Scientists Ltd COMPUTATIONAL FLUID DYNAMICS Simulation of Turbulent Flows and Pollutant Dispersion.

Phoenics User Conference on CFD May 2004 Vipac Engineers & Scientists Ltd COMPUTATIONAL FLUID DYNAMICS Simulation of Turbulent Flows and Pollutant Dispersion.
1 Application of for Predicting Indoor Airflow and Thermal Comfort.

1 Application of for Predicting Indoor Airflow and Thermal Comfort.
MODELLING OF HYDROGEN JET FIRES USING CFD

MODELLING OF HYDROGEN JET FIRES USING CFD
OpenFOAM for Air Quality Ernst Meijer and Ivo Kalkman First Dutch OpenFOAM Seminar Delft, 4 november 2010.

OpenFOAM for Air Quality Ernst Meijer and Ivo Kalkman First Dutch OpenFOAM Seminar Delft, 4 november 2010.
1 Validation of CFD Calculations Against Impinging Jet Experiments Prankul Middha and Olav R. Hansen, GexCon, Norway Joachim Grune, ProScience, Karlsruhe,

1 Validation of CFD Calculations Against Impinging Jet Experiments Prankul Middha and Olav R. Hansen, GexCon, Norway Joachim Grune, ProScience, Karlsruhe,
ICHS 2007, San Sebastian, Spain 1 SAFETY OF LABORATORIES FOR NEW HYDROGEN TECHNIQUES Heitsch, M., Baraldi, D., Moretto, P., Wilkening, H. Institute for.

ICHS 2007, San Sebastian, Spain 1 SAFETY OF LABORATORIES FOR NEW HYDROGEN TECHNIQUES Heitsch, M., Baraldi, D., Moretto, P., Wilkening, H. Institute for.
Forschungszentrum Jülich in der Helmholtz-Gemeinschaft E.-A. Reinecke, S. Kelm, S. Struth, Ch. Granzow, U. Schwarz* Catalytic recombiners Design studies.

Forschungszentrum Jülich in der Helmholtz-Gemeinschaft E.-A. Reinecke, S. Kelm, S. Struth, Ch. Granzow, U. Schwarz* Catalytic recombiners Design studies.
1 Dept. of Energy Technology, Div. of Applied Thermodynamics and Refrigeration Tube diameter influence on heat exchanger performance and design. Single.

1 Dept. of Energy Technology, Div. of Applied Thermodynamics and Refrigeration Tube diameter influence on heat exchanger performance and design. Single.
International Conference on Hydrogen Safety, Pisa, 8-10 September 2005 1 CFD modeling of large scale LH2 spills in open environment Dr. A.G Venetsanos.

International Conference on Hydrogen Safety, Pisa, 8-10 September CFD modeling of large scale LH2 spills in open environment Dr. A.G Venetsanos.
HySafe network & HyTunnel project Dr.-Ing. Thomas JORDAN, Prof. Dr. Suresh KUMAR New Energy Carriers in tunnels and underground.

HySafe network & HyTunnel project Dr.-Ing. Thomas JORDAN, Prof. Dr. Suresh KUMAR New Energy Carriers in tunnels and underground.
CFD Modeling for Helium Releases in a Private Garage without Forced Ventilation Papanikolaou E. A. Venetsanos A. G. NCSR DEMOKRITOS Institute of Nuclear.

CFD Modeling for Helium Releases in a Private Garage without Forced Ventilation Papanikolaou E. A. Venetsanos A. G. NCSR "DEMOKRITOS" Institute of Nuclear.
International Conference on Hydrogen Safety, Sep. 8-10, Pisa, Italy NUMERICAL STUDY OF A HIGHLY UNDER-EXPANDED HYDROGEN JET B P Xu, J P Zhang, J X WEN,

International Conference on Hydrogen Safety, Sep. 8-10, Pisa, Italy NUMERICAL STUDY OF A HIGHLY UNDER-EXPANDED HYDROGEN JET B P Xu, J P Zhang, J X WEN,
On numerical simulation of liquefied and gaseous hydrogen releases at large scales V. Molkov, D. Makarov, E. Prost 8-10 September 2005, Pisa, Italy First.

On numerical simulation of liquefied and gaseous hydrogen releases at large scales V. Molkov, D. Makarov, E. Prost 8-10 September 2005, Pisa, Italy First.
1 Simulation of Compressible CavaSim Simulation of Cavitating Flows Using a Novel Stochastic Field Formulation, FSM Franco Magagnato Andreas G. Claas KIT,

1 Simulation of Compressible CavaSim Simulation of Cavitating Flows Using a Novel Stochastic Field Formulation, FSM Franco Magagnato Andreas G. Claas KIT,
Centre for Fire and Explosion Studies Numerical Study of Spontaneous Ignition of Pressurized Hydrogen Release through a length of tube with local contraction.

Centre for Fire and Explosion Studies Numerical Study of Spontaneous Ignition of Pressurized Hydrogen Release through a length of tube with local contraction.
© British Crown Copyright 2007/MOD Numerical Simulation Using High-Resolution Methods A. D. Weatherhead, AWE D. Drikakis, Cranfield University.

© British Crown Copyright 2007/MOD Numerical Simulation Using High-Resolution Methods A. D. Weatherhead, AWE D. Drikakis, Cranfield University.
Analysis of Buoyancy-Driven Ventilation of Hydrogen from Buildings C. Dennis Barley, Keith Gawlik, Jim Ohi, Russell Hewett National Renewable Laboratory.

Analysis of Buoyancy-Driven Ventilation of Hydrogen from Buildings C. Dennis Barley, Keith Gawlik, Jim Ohi, Russell Hewett National Renewable Laboratory.
A. Spentzos 1, G. Barakos 1, K. Badcock 1 P. Wernert 2, S. Schreck 3 & M. Raffel 4 1 CFD Laboratory, University of Glasgow, UK 2 Institute de Recherche.

A. Spentzos 1, G. Barakos 1, K. Badcock 1 P. Wernert 2, S. Schreck 3 & M. Raffel 4 1 CFD Laboratory, University of Glasgow, UK 2 Institute de Recherche.
An Intercomparison Exercise on the Capabilities of CFD Models to Predict Deflagration of a Large-Scale H 2 -Air Mixture in Open Atmosphere J. García, E.

An Intercomparison Exercise on the Capabilities of CFD Models to Predict Deflagration of a Large-Scale H 2 -Air Mixture in Open Atmosphere J. García, E.

Similar presentations

Ads by Google