Type of Publication
Year of Publication
2009
Authors
R. Schefer; G. Evans; Y. Zhang; A. Ruggles; R. Greif
Abstract

Flame Ignition Limits: Ignitable Gas Envelope Considerations

The ignitable gas envelope is importantto establishing separation distances forunintended releases of hydrogen.

  • The extent of the ignitable gas envelopecan be based on several criteria. Which is best for Codes & Standardsdevelopment?
  • For example:
    • Time-averaged H2concentrationfield  reveals extent of cloud withintraditional flammability limits (4% LFLto 75% RFL).
    • Do traditional (static) flammabilitylimits   provide a suitable measure ofignitability in turbulent flowingsystems?
Keywords