Engineering Question #1936

Doug Tare, a 42 year old male from Freehold asks on February 25, 2004,

Since hydrogen is being considered for fuel purposes it's minimum ignition energy (m.i.e.) of .02 mJ maybe of concern. Gasoline fumes have a higher m.i.e. but they can be ignited with static electricity sparks and cell phone signals. If we convert to hydrogen energy would we need to be concerned about any weaker ignition sources? In other words, what (if any) are the commonly occuring, non-controlled, sources of ignition that are weaker than cell phone signals and static electricity?

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