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this post was submitted on 01 Mar 2024
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Hydrogen cannot be greener than an EV, because it's just an EV with more steps. It's energy intensive to turn electricity + water to hydrogen, transport it, pump it, then convert it back to electricity.
The losses from simply running electrons through a wire are very small.
It is physically impossible for hydrogen cars to ever be as green as EVs. In order to do so you'd have to break laws of physics.
E: ok people. You live in your little fantasy world where thermodynamics aren't a thing.
In a pure fuel comparison sure, does that still hold true when you also factor in manufacturing?
You conveniently forgot about battery charging and discharging losses.
Yes.
I didn't. Those are very small. Compared to the losses of a HFCEV or even worse, a combustion hydrogen car.
There are laws of thermodynamics and there are laws of kinetics.
Fuels have much more power density than batteries. You can't deliver power as fast with a battery compared to a fuel. It doesn't matter if thermodynamically one is more efficient or greener than the other. You would be crazy to suggest moving an airbus with a battery, that's physically impossible.
I'm a researcher in both fields (batteries and hydrogen)
Sure, but I'm not talking about jets, which yeah, do need a far greater energy density than batteries can currently provide.