Quote:
Originally Posted by samwichse
This is incorrect. Look at your source again. That's 1 liter of liquid hydrogen. Good luck carrying that around. 1kg of hydrogen gas at 1 atmosphere is 11.126m^3, or 11,126 literally.
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Aaah, there was the mistake I was looking for, and the reason why this part of my calculation above didn't measure out:
0,208 kg of H2 would be 2,9 liter of hydrogen (according to uigi.com/h2_conv.html )
So 2,9 liter, whereas in my other calculation I had 11,25 liter.
In this other calculation I calculated it using a pressure of 206 bar; so in this calculation I would have a pressure of 799 bar
--> 11,25 x 206 = 2317,5
--> 2317/ 2,9 = 799 bar
Thanks for finding it.
Then much does 1 kg of H2 equal in terms of liter of hydrogen (at 1 bar of pressure) ? I calculated this yet another way:
energy in 1 gallon of gasoline (33,41 kWh) = 1 kg H2
33,41 kWh = 1 bar x 0,003 kWh/l x 11136 l
or 33,41 kWh = 250 bar x 0,003 kWh/l x 44,54 l
So you need about 12 x 4 gallon CNG tanks (with H2 compressed @250 bar) for the energy in 1 kg H2