Hydrogen: Exceptional Properties and Hazard Assessment & Mitigation

July 23-25, 2024

BlazeTech Corporation
29B Montvale Ave.
Woburn, MA 01801 USA

Register by June 20, 2024

3-day course in-person. All participants must show proof of compliance with US federal and Massachusetts COVID-19 travel requirements at the time of the course; and those who do not will be denied entrance to the course.

By N. Albert Moussa, PhD, PE

View Brochure/Register

Course Outline

• Introduction
  • H2 production: Green, Blue, Grey, Black
  • Hydrogen as a Fuel v. Energy Carrier
  • Fuel Cells v. Combustion Systems
  • Hydrogen v. lithium-ion batteries
• Exceptional Properties that Differentiate Hydrogen from Other Gases
  • Negative Joule-Thomson coefficient
  • Thermal diffusion, thermophoresis
  • Hydrogen embrittlement of metals, polymers
  • Formation of peroxides and hydrides
  • Flammability properties of hydrogen
• Accidental Release of Hydrogen
  • Discharge flow rates at temperature and pressure: gas v. liquid, leak v. large dump
  • Compressed gas heats up upon expansion!
  • Jet formation and mixing with surrounding air
  • Air condensation around a liquid H2 leak
  • Spreading and boiling of a liquid H2 pool
  • Spreading of initially-dense H2 vapors
  • Formation and rise of buoyant puffs/plumes
  • Dilution and dispersion prior to ignition?
• Hydrogen Fires in the Open Air
  • Pool and jet fires (turbulent diffusion flames)
  • Wind effect on heating adjacent structures
  • Reactive dispersion and fire plumes
  • Delayed ignition and vapor cloud fires
  • Thermal radiation, Domino events, fireballs
  • Test results of liquid spills at various scales
  • Mitigation strategies: disperse or ignite?
• Hydrogen Fires Inside Structures
  • Ignition and burning of hydrogen
  • H2 enhancement of materials already burning: FAA test results
  • Pressure rise and thermal damage
  • Fire plume emanating from openings
  • Mitigation strategies: ventilate to preempt ignition; once ignited let burn or extinguish?
• Hydrogen Explosions
  • H2 gas accumulation in structures
  • Deflagration, detonation, DDT and their dependence on local conditions
  • Requirements for H2/open air detonation
  • Quasi-static v. dynamic pressure rise
  • Incident/reflected pressures and impulse
  • Blast analysis and structural failure
  • Survey of TNT equivalent yields of hydrogen
  • Mitigation strategies
• H2 Safety Assessment in Transportation
  • Storage as compressed gas v. liquid
  • Hazard of high-pressure hydrogen tanks
  • Lessons learned from hydrogen car fleet
  • Tube Trailer fire in Diamond Bar, CA
  • Applications to long haul transport
  • Liquid tank configurations in aircraft
  • Comparative crash fire for H2 v. fossil fuels
  • Pros and cons for H2 transport as ammonia
  • Adaptation of lessons learned from shipping liquified gases and mitigation strategies
• Hydrogen Safety Assessment in Facilities
  • Data centers, backup power, and airports
  • Lessons learned from chemical plants
  • Protection of liquid hydrogen storage tanks
  • Fire suppression considerations
  • Explosion in Gangneung, South Korea
  • Adaptation of lessons learned from storage of liquified gases and mitigation strategies
  • Hazard/Risk Assessment
• Blended H2/Natural Gas in Pipelines
  • Flammability properties of H2/NG ratios
  • Fire/radiation as function of H2/NG ratios
  • Challenges in residential and commercial use
• Closure
  • Review of Mitigation strategies

Discussions are encouraged throughout the course.

Faculty:

Dr. N. Albert Moussa PhD, PE