3 ms·
You can make a lot of that back with the difference in efficiency between an internal combustion engine (theoretical max of 50%, and only under ideal conditions
by NickNameNick 8y ago
You can make a lot of that back with the difference in efficiency between an internal combustion engine (theoretical max of 50%, and only under ideal conditions)
vs the efficiency of an electric motor (90% or better) and associated losses from the motor controller and the fuel cell.
- mikeash 8y agoThis fuel is 3% hydrogen and is claimed to achieve 200% the MPG of gasoline. Hydrogen has 3x the energy so that gets us to 9%. Let's say hydrogen has 4x the efficiency of turning energy into miles (which I think is a reasonable estimate), so that gets us to 36%. This stuff may be denser than gasoline. It's 60% water. Let's make the extremely generous assumption that the rest of the stuff occupies no space at all, giving a density of 1.7kg/L. Gasoline is 0.7kg/L, so that's an improvement of 2.4x which gets us to 86%. Still more than a factor of 2 short of the claim.