« on: May 14, 2007, 10:22:18 AM »
Karlos wrote:
Compressed air isn't that lightweight, especially when you are talking about 300 bar. That's 300x denser than usual (roughly 315 kg/m^3 at 20 Celcius), even before you get to the weight of the material needed to contian it. However, it said they used a form of carbon fibre for that.
-edit-
It says on the site (under the FAQ) that the car holds 90 m^3 (at 300bar), so that's ~92kg just for the compressed air itself. I think standard batteries are a good bit lighter.
On the plus side, it get's lighter as you expend it :-D
absolutely, mate.
the big question is not how much energy, but the energy per kilogram or energy per litre. in terms of the fuel only, and not the storage, hydrogen gas is something like 135MJ/kg with the petrochemical fuels are around 45-50 MJ/kg. however, Hydrogen suffers horribly from lack of volumetric density - even when compressed. it also suffers from leakage due to the tiny molecule (smallest one possible!)
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