Re: Low cost hydrogen today

http://hypertextbook.com/facts/2003/ArthurGolnik.shtml

Gasoline contains 12.7 kWh/kg and 8.76 kWh/L (not including the tank)

http://en.wikipedia.org/wiki/Energy_density

Liquid hydrogen 143 MJ/kg (41.1 kWh/kg and 10.1 MJ/L (2.80 kWh/L)
(not including the tank)

http://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/iiia1_sirosh.pdf

Gaseous hydrogen in a tank 1.9 kWh/kg and 1.3 kWh/L (including the
tank)

All these fellows are saying is that hydrogen fueled vehicles will
have their fuel storage systems weigh more than gasoline fueled
systems. In this they are true.

Where we differ is their mis-guided conclusion that these minor
differences in fuel system fractions are show stoppers. They are
not!

http://avt.inel.gov/pdf/hydrogen/roush_hev_fact.pdf

This stems from the fact that fuel systems in ground vehicles,
regardless of the large energy density differences, are only a very
small fraction of total weight

http://www.chevrolet.com/m/06/quickfacts/09_Silverado_combined.pdf

With 26 gallons on board the Silverado, and 2.84 kg per gallon -
that's a total weight of 73.86 pounds. This is 1.2% of the total
vehicle weight. Now, replacing this with even gaseous hydrogen,
increases the weight of the fuel system to 6.7x the weight raising it
to 8% of total vehicle weight.

Can we build a vehicle - obviously we can. Is such a vehicle
practical? Obviously it is. Is hydrogen in even its least
'contained' form impossible to use? Obviously not - hydrogen is
easily usable.

DO THE MAJOR OIL COMPANIES BENEFIT FROM DISINFORMATION RE HYDROGEN
BEING ACCEPTED UNCRITICALLY? *OBVIOUSLY THEY DO!!*
.

Relevant Pages

  • Re: Low cost hydrogen today
    ... Gasoline contains 12.7 kWh/kg and 8.76 kWh/L (not including the tank) ... differences in fuel system fractions are show stoppers. ... that's a total weight of 73.86 pounds. ... to 8% of total vehicle weight. ...
    (sci.energy.hydrogen)
  • Re: "No-one is opening their wallet"
    ... terrestral CONTAINED hydrogen for personal vehicle apps has ... > only the tiniest fraction of the energy density of gasoline by weight. ... they put the tank outside the ...
    (sci.energy.hydrogen)
  • Re: MOT parking brake performance
    ... > ...of the vehicle's weight. ... > (weight used is unladen weight plus weight of driver, vehicle toolkit & ... > half a tank of fuel) ...
    (uk.rec.cars.maintenance)
  • Re: Hydrogen fueled Helicopter - more Mook idiocy
    ...   Who knows? ... weight system for aerospace applications. ... a tank holding 10 metric tons of hydrogen has a voume of 142.86 cubic ... that is whenever the whole truth and nothing but the truth ...
    (sci.energy.hydrogen)
  • Re: Hydrogen Cars, Trucks, and Buses Are the Answer Indeed
    ... weight, not energy per unit volume that is the issue. ... Here are the energy densities and tank fractions for jet fuel and ... Take off Weight 298 tonnes ...
    (sci.energy.hydrogen)