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View Diary: Recent DOE Break-Through with Hydrogen Fuel Cells, should make them Affordable (275 comments)

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  •  Thermal Energy Per Pound (0+ / 0-)

    Gasoline is about 18,500 BTU/lb vs. hydrogen at 51,500 BTU/lb

    (Damn, it's been a long time since I've been in engineering)  The problem is that if a gallon of gas provides 114,000 BTU and 1 cubic foot of hydrogen at atmospheric pressure (14.7psi) produces 319 BTU then 8 gallons of hydrogen at 5,000 psi would be equivalent to a gallon of gas.  I don't know how willing I am to drive around with 8 gallons of hydrogen at 5,000 psi.

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