1 JRC – IE Pisa on 8.9.2004 CFD modelling of accidental hydrogen release from pipelines. H. Wilkening - D. Baraldi Int. Conf. on Hydrogen Safety Pisa Sept.

Slides:



Advertisements
Similar presentations
Phoenics User Conference on CFD May 2004 Vipac Engineers & Scientists Ltd COMPUTATIONAL FLUID DYNAMICS Simulation of Turbulent Flows and Pollutant Dispersion.
Advertisements

Hongjie Zhang Purge gas flow impact on tritium permeation Integrated simulation on tritium permeation in the solid breeder unit FNST, August 18-20, 2009.
ES 202 Fluid and Thermal Systems Lecture 28: Drag Analysis on Flat Plates and Cross-Flow Cylinders (2/17/2003)
FEMLAB Conference Stockholm 2005 UNIVERSITY OF CATANIA Department of Industrial and Mechanical Engineering Authors : M. ALECCI, G. CAMMARATA, G. PETRONE.
Carbon Deposition in Heterogeneous Catalysis
MINISTERO DELL’INTERNO DIPARTIMENTO DEI VIGILI DEL FUOCO, DEL SOCCORSO PUBBLICO E DELLA DIFESA CIVILE DIREZIONE CENTRALE PER LA FORMAZIONE An Application.
PROPERTIES OF FLAMMABLE MATERIALS. Flammability Flammable Flammable –Capable of being ignited and of burning –Synonymous with combustible.
Modeling Wing Tank Flammability Dhaval D. Dadia Dr. Tobias Rossmann Rutgers, The State University of New Jersey Piscataway, New Jersey Steven Summer Federal.
OpenFOAM for Air Quality Ernst Meijer and Ivo Kalkman First Dutch OpenFOAM Seminar Delft, 4 november 2010.
Flammable extent of hydrogen jets close to surfaces Benjamin Angers*, Ahmed Hourri*, Luis Fernando Gomez, Pierre Bénard and Andrei Tchouvelev** * Hydrogen.
1 Validation of CFD Calculations Against Impinging Jet Experiments Prankul Middha and Olav R. Hansen, GexCon, Norway Joachim Grune, ProScience, Karlsruhe,
DISPERSION TESTS ON CONCENTRATION AND ITS FLUCTUATIONS FOR 40MPa PRESSURIZED HYDROGEN A. Kouchi, K. Okabayashi, K. Takeno, K. Chitose Mitsubishi Heavy.
ICHS 2007, San Sebastian, Spain 1 SAFETY OF LABORATORIES FOR NEW HYDROGEN TECHNIQUES Heitsch, M., Baraldi, D., Moretto, P., Wilkening, H. Institute for.
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,
The Ocean. Ocean Water (ch. 17.1) We depend on ocean for: –Food & resources –Acts as barrier between continents.
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.
Enclosure Fire Dynamics
Evaluation of Safety Distances Related to Unconfined Hydrogen Explosions Sergey Dorofeev FM Global 1 st ICHS, Pisa, Italy, September 8-10, 2005.
Eurocode 1: Actions on structures – Part 1–2: General actions – Actions on structures exposed to fire Part of the One Stop Shop program Annex D (informative)
EXPLOITATION OF GAS HYDRATES AS AN ENERGY RESOURCE K. Muralidhar Department of Mechanical Engineering Indian Institute of Technology Kanpur Kanpur
Atmospheric Flow over Terrain using Hybrid RANS/LES European Wind Energy Conference & Exhibition 2007 A. Bechmann, N.N. Sørensen and J. Johansen Wind Energy.
Fluids Fluids in Motion. In steady flow the velocity of the fluid particles at any point is constant as time passes. Unsteady flow exists whenever the.
THE STAR OF OUR SOLAR SYSTEM Solar radiation travels from the sun to the earth at the speed of light. The speed of light is km/s.
22nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference June 24th-26th, 2002 Adams Mark Hotel - St. Louis, MS Modeling Inert Gas Distribution.
Chapter 12 Liquids and Solids.
1 U N C L A S S I F I E D Modeling of Buoyant Plumes of Flammable Natural Gas John Hargreaves Analyst Safety Basis Technical Services Group LA-UR
© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.
Pro-Science 4 th International Conference of Hydrogen Safety, September 12-14, 2011, SAN FRANCISCO, USA EXPERIMENTAL STUDY OF IGNITED UNSTEADY HYDROGEN.
ICHS4, San Francisco, September E. Papanikolaou, D. Baraldi Joint Research Centre - Institute for Energy and Transport
A Numerical / Analytical Model of Hydrogen Release and Mixing in Partially Confined Spaces Kuldeep Prasad, William Pitts and Jiann Yang Fire Research Division.
Large-Scale Hydrogen Release In An Isothermal Confined Area J.M. LACOME – Y. DAGBA – D. JAMOIS – L. PERRETTE- C. PROUST ICHS- San Sebastian, sept 2007.
The Sun 24.3 A typical star powered by nuclear reactions Mostly the (fusion of hydrogen to form helium) Which releases energy.
Page 1 SIMULATIONS OF HYDROGEN RELEASES FROM STORAGE TANKS: DISPERSION AND CONSEQUENCES OF IGNITION By Benjamin Angers 1, Ahmed Hourri 1 and Pierre Bénard.
Mitglied der Helmholtz-Gemeinschaft Simulation of the efficiency of hydrogen recombiners as safety devices Ernst-Arndt Reinecke, Stephan Kelm, Wilfried.
Explosion An explosion is a rapid expansion of gases resulting in a rapid moving pressure or shock wave. The expansion can be mechanical or it can be.
ICHS, September 2007 On The Use Of Spray Systems: An Example Of R&D Work In Hydrogen Safety For Nuclear Applications C. Joseph-Auguste 1, H. Cheikhravat.
© NTScience.co.uk 2005KS3 Unit 8i – Heating and Cooling1 Heating and Cooling.
Objective of the investigation: Determine the number and arrangement of jet fans to be installed in the Acapulco Tunnel that will ensure an air quality.
Numerical Investigation of Hydrogen Release from Varying Diameter Exit
Preparing for the Hydrogen Economy by Using the Existing Natural Gas System as a Catalyst // Project Contract No.: SES6/CT/2004/ NATURALHY is an.
IESVic 1 QUANTITATIVE IMAGING OF MULTI-COMPONENT TURBULENT JETS Arash Ash Supervisors: Dr. Djilali Dr. Oshkai Institute for Integrated Energy Systems University.
HIGH PRESSURE HYDROGEN JETS IN THE PRESENCE OF A SURFACE P. Bénard, A. Tchouvelev, A. Hourri, Z. Chen and B. Angers.
Governing Equations Conservation of Mass Conservation of Momentum Velocity Stress tensor Force Pressure Surface normal Computation Flowsheet Grid values.
Preparing for the Hydrogen Economy by Using the Existing Natural Gas System as a Catalyst // Project Contract No.: SES6/CT/2004/ NATURALHY is an.
Modeling of hydrogen explosion on a pressure swing adsorption facility *B. Angers 1, A. Hourri 1, P. Benard 1 E. Demaël 2, S. Ruban 2, S. Jallais 2 1 Institut.
171 PC-HYSPLIT WORKSHOP Workshop Agenda Model Overview Model history and features Computational method Trajectories versus concentration Code installation.
Mr. Nektarios Koutsourakis1,2 Dr. Alexander Venetsanos2
© GexCon AS JIP Meeting, May 2011, Bergen, Norway 1 Ichard M. 1, Hansen O.R. 1, Middha P. 1 and Willoughby D. 2 1 GexCon AS 2 HSL.
Fluids. Units of Chapter 10 Phases of Matter Density and Specific Gravity Pressure in Fluids Atmospheric Pressure and Gauge Pressure Pascal’s Principle.
Date of download: 5/30/2016 Copyright © ASME. All rights reserved. From: In Situ PLIF and Particle Image Velocimetry Measurements of the Primary Entrainment.
Mixing Length of Hydrogen in an Air Intake Greg Lilik EGEE 520.
University of Wisconsin -- Engine Research Center slide 1 Counter-flow diffusion flame ME Project Chi-wei Tsang Longxiang Liu Krishna P.
Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Grid-Convergent Spray Models for Internal Combustion Engine Computational Fluid.
S.G. Giannissi1,2, I.C.Tolias1,2, A.G. Venetsanos1
ICHS 2015 – Yokohama, Japan | ID195
Tsinghua University, Beijing, China
Audrey DUCLOS1, C. Proust2,3, J. Daubech2, and F. Verbecke1
International Conference on Hydrogen Safety
Date of download: 12/19/2017 Copyright © ASME. All rights reserved.
Numerical Simulation of Premix Combustion with Recirculation
DEVELOPMENT OF AN ITALIAN FIRE PREVENTION
Global Warming Problem
COMPUTATIONAL MODELING OF PARTICLE TRANSPORT IN TURBULENT AIRFLOW
Telemark University College,
E. Papanikolaou, D. Baraldi
Flammability profiles associated with high pressure hydrogen jets released in close proximity to surfaces ICHS 6 Yokohama Hall, J., Hooker,
Natural and Forced Ventilation of Buoyant Gas Released in a Full-Scale Garage : Comparison of Model Predictions and Experimental Data Kuldeep Prasad, William.
ICHS5 – 2013 September, Brussels, Belgium | ID161
CFD computations of liquid hydrogen releases
Presentation transcript:

1 JRC – IE Pisa on CFD modelling of accidental hydrogen release from pipelines. H. Wilkening - D. Baraldi Int. Conf. on Hydrogen Safety Pisa Sept. 8-10, Motivation 2.2-D Simulations for methane and hydrogen 3.3-D Simulation for methane and hydrogen 4.Conclusion

2 JRC – IE Pisa on Pipeline disaster in Belgium in 2004 Left picture is a view of the industrial area destroyed by the explosion and the subsequent fire. The right picture shows the fire caused by the natural gas released from the pipeline after being ignited by the explosion.

3 JRC – IE Pisa on Modelling of light methane dispersion (1/2) Streamlines of high- pressure release from the pipeline and wind at 10 m/s from left to right. Molar methane concentrations the same case

4 JRC – IE Pisa on Modelling of methane gas dispersion (2/2) Molar methane concentrations, no wind. Molar methane concentrations, 10 m/s wind from left to right.

5 JRC – IE Pisa on Comparison to hydrogen Molar hydrogen concentrations, 10 m/s wind from left to right. Molar hydrogen concentrations, no wind.

6 JRC – IE Pisa on Comparison of thermal energy released between methane and hydrogen The thermal energy released is very similar for methane and hydrogen until the first gas is leaving the computational domain, the wind keeps the gas within the computational domain longer.

7 JRC – IE Pisa on Methane molar concentrations for wind (top) and no-wind (bottom) case both 7.5 s after the high-pressure release starts. Shown are only those concentrations within the flammability limit. These are the values between 5.3 % and 15 % all other concentrations are set to 0 %. Flammability limits in methane gas dispersion

8 JRC – IE Pisa on Flammability limits in hydrogen gas dispersion Hydrogen molar concentrations for wind (top) and no-wind (bottom) case. Shown are only those concentrations within the flammability limit. These are the values between 4 % and 74 % all other concentrations are set to 0 %.

9 JRC – IE Pisa on Comparison of thermal energy released within the flammability limits The thermal energy of the released flammable gases is very different for methane and hydrogen due to the wider flammability limits of hydrogen (4 – 74% vol. conc.) compare to methane (5.3 – 15%).

10 JRC – IE Pisa on Numerical Setup 3-D Simulation Grid discritisation and domain decomposition for parallel computing Total grid with 3.5 mio. cells run on 16 CPU’s or 8 CPU’s

11 JRC – IE Pisa on D methane release and dispersion simulation 121 kg/s methane release rate corresponds to 6 GW thermal power 4 % molar conc. Isosurface 10 m/s wind

12 JRC – IE Pisa on Flammability limits of methane within the release About 10% to 30% of the released methane within the flammability limits

13 JRC – IE Pisa on D hydrogen release and dispersion simulation 4 % molar conc. Isosurface 10 m/s wind 42.2 kg/s hydrogen release rate corresponds to 5 GW thermal power

14 JRC – IE Pisa on Flammability limits of hydrogen within the release About 70% of the released hydrogen within the flammability limits

15 JRC – IE Pisa on Comparison of thermal energy released between methane and hydrogen for 3-D The thermal energy of the released gases is similar for methane and hydrogen also in 3-D but again differs quite a lot for the gases within the flammability limits.

16 JRC – IE Pisa on Conclusions 1.Accidental releases from a methane and hydrogen pipeline have been modelled and compared for a scenario with and without wind. 2.Although the amount of total released energy is similar for methane and hydrogen, the amount of flammable hydrogen is larger than methane in all cases due to the wider flammability limits of hydrogen. 3.Due to the larger density of methane, methane might be more easily accumulated close to the ground under certain conditions (wind and geometric configuration) than hydrogen.

17 JRC – IE Pisa on

18 JRC – IE Pisa on Governing Equations for Fluid Flow Mass Momentum Species Energy

19 JRC – IE Pisa on Gas Dispersion in HyJet Jx7 Iso surface of 15% Vol. He colored with turbulent intensity at 200 s The HyJet experiments will be used to validate a CFD-Code for dispersion modelling. The experiments were performed in the Battelle-Model-Containment. Within the experiments Helium is release through a nozzle in one of the lower so called banana rooms. After the release a Helium stratified atmosphere is developed in the upper part of the containment. In HyJet Jx7 Helium is released through a 9.5 cm nozzle at a speed of 42 m/s for 200 s.

20 JRC – IE Pisa on HyJet Jx7 comparison with experiment Axial profile through jet axis 190 s after the beginning of injection

21 JRC – IE Pisa on New High Performance Computing Hardware The CURIE High Performance Computing Cluster is installed with a total of 50 CPU’s. The System has a performance of 128 GFLOPS (billion floating point operations per second) being by fare the most powerful computing system in the JRC. The system is used for hydrogen safety studies, for safety studies of new innovative nuclear reactors and for modelling of material failure on very small scale (crystal modelling) and other applications demanding high performance computing power.

22 JRC – IE Pisa on HPC load on CURIE last month (2/2) Performance of the cluster via web interface (individual compute nodes)

23 JRC – IE Pisa on HPC load on CURIE last month (1/2) Performance of the cluster via web interface