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Old 06-06-2008, 03:05 AM   #5 (permalink)
 milohimself 
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Honda states that the capacity of the tank in their Civic GX is 8.03GGE, or gasoline gallon equivalent. I calculated that to be roughly 10.6 therms. Of course that's not an exact number, as volume of gas changes with pressure and temperature. You're also comparing BTU's to petroleum gas. But that's about as good a number as I could come up with. CNG in cars is measured in GGE's, and I found one GGE to be equivalent to about 1.32 therms. If anybody can do better math than that, feel free to post up.

IIRC, CNG vehicles store gas at 3600psi, or roughly 250 bar.

I don't expect everybody to switch to CNG. It's not viable as a mass option. But it's something I'd prefer to do to save money and do my part. All my money and hopes for alternative fuel in the future relies on switching all transportation fuel in the US to algae-produced oil.
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Last edited by milohimself; 06-06-2008 at 03:07 AM..
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