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

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  •  I don't know if hydrogen is "so" dense. (0+ / 0-)

    Seeing that there is more hydrogen in a gallon of oil than there is in a gallon of hydrogen, go figure. It's all in the way hydrogen clings to carbon molecules- more compact... maybe by weight, but not by volume.

    "WAR IS PEACE FREEDOM IS SLAVERY FOX NEWS IS JOURNALISM"

    by FakeNews on Sun Apr 24, 2011 at 03:48:59 PM PDT

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    •  More BTUs per pound (0+ / 0-)

      Diesel 18,111 BTU/lb
      Liquid hydrogen 51,500 BTU/lb

      "Drop the name-calling." Meteor Blades 2/4/11

      by indycam on Sun Apr 24, 2011 at 06:24:22 PM PDT

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      •  Thanks. 3:1 ration for weight (1+ / 0-)
        Recommended by:
        Sneelock

        Volume-wise though - how much larger would a jet's tanks have to be to hold the same amount of BTU's? I think I had heard the same ratio 3:1 for hydrogen vs. diesel. Too bad there are not naturally occurring deposits of hydrogen - it all has to be manufactured. The other bad news is that hydrogen atom is so small that even the best holding tanks would loose 1 - 2 % per day through any material surrounding it.

        OK, later. FN

        "WAR IS PEACE FREEDOM IS SLAVERY FOX NEWS IS JOURNALISM"

        by FakeNews on Mon Apr 25, 2011 at 04:33:40 AM PDT

        [ Parent ]

        •  The airplane above is not a jet . (1+ / 0-)
          Recommended by:
          Sneelock
          The other bad news is that hydrogen atom is so small that even the best holding tanks would loose 1 - 2 % per day through any material surrounding it.
          The bad news is that its hard to keep it from boiling off .

          "Drop the name-calling." Meteor Blades 2/4/11

          by indycam on Mon Apr 25, 2011 at 03:52:12 PM PDT

          [ Parent ]

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