Comment on Toyota trials hydrogen-powered vehicle on public roads in Australia

18107@aussie.zone ⁨11⁩ ⁨months⁩ ago

A hydrogen engine is so much worse for efficiency than a hydrogen fuel cell, and even that is not good compared to batteries. I’d estimate the round trip efficiency of a hydrogen engine to be about 10-15%. So for the same energy that could be used to drive a battery EV 100km, this car from Toyota could drive 12km.

Additionally, hydrogen is not very energy dense per volume. A compressed hydrogen tank that replaces the boot/trunk of the car would have enough hydrogen for about 100km of range.

Please let me know if I’m wrong about any of these numbers. For Toyota’s sake, I really hope I’m wrong.

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