fundamentals of hydrogen safety engineering_PPT_Training.pdf

1 Introduction
1.1. Why hydrogen?
1.2. Public perception of hydrogen technologies
1.3. The importance of hydrogen safety
1.4. Hazards, risk, safety
1.5. Hydrogen safety communication
1.6. The subject and scope of hydrogen safety engineering
1.7. The emerging profession of hydrogen safety engineering
1.8. Knowledge gaps and future progress
2 Hydrogen properties and hazards
2.1. Physical and chemical properties
2.2. Combustion properties
2.3. Comparison with other fuels
2.4. Health hazards
2.5. Concluding remark
3 Regulations, codes and standards and hydrogen safety engineering
4 Hydrogen safety engineering: framework and technical subsystems
4.1. Framework
4.2. Technical sub-systems
5 Unignited releases
5.1. Expanded and under-expanded jets
5.2. Under-expanded jet theories
5.3. The similarity law for concentration decay in momentum-dominated jets
5.4. Concentration decay in transitional and buoyancy-controlled jets
6 Dispersion of hydrogen in confined space
6.1. Dispersion of permeated hydrogen in a garage
6.2. The pressure peaking phenomenon
7 Ignition of hydrogen mixtures
7.1. Overview of hydrogen ignition mechanisms
7.2. Spontaneous ignition of sudden releases
8 Microflames
8.1. Quenching and blow-off limits
9 Jet fires
9.1. Introduction to hydrogen jet fires and safety issues
9.2. Chronological overview of hydrogen jet flame studies
9.3. The drawback of Froude-based correlations
9.4. The similitude analysis and a dimensional correlation
9.5. The jet flame blow-off phenomenon
9.6. The novel dimensionless flame length correlation
9.7. Flame tip location and equivalent unignited jet concentration
9.8. Separation distances from a hydrogen leak
9.9. Effect of nozzle shape on flame length
9.10. Effect of jet attachment of flame length
9.11. Pressure effects of hydrogen jet fires
9.12. Summary