Shouty Kilmer says hydrogen cars are the future.

[cRiPpLe_rOoStEr]

Originally Posted by Xist

He just said how difficult it is to transport electricity. We have been doing it for over a century!

Sure it's no rocket-science, but it's still quite dangerous. You know, all those high-voltage lines, plus there is always some loss due to induction and resistivity of the cables.

He said that it takes fifty-eight minutes to fully charge a Tesla using a supercharger, so that is a problem, but I do not see how anything that he mentioned was a fatal flaw.

That may not seem to be a fatal flaw, but it may become annoying. Plus there aren't many superchargers all around...

[ProDigit]

Even if you do have a supercharger, 120kWh isn't guaranteed.
And if it is, it's definitely not doing any good to the battery's lifetime.

[Xist]

Which is safer, electricity or hydrogen?

[cRiPpLe_rOoStEr]

Originally Posted by Xist

Which is safer, electricity or hydrogen?

That's a good question, since both can be dangerous. But anyway, I'm sure more people are familiarized with safety procedures regarding electricity than hydrogen.

[ProDigit]

Hydrogen is like LPG.
It's pretty safe, as long as the trucks don't have an accident, and the cars get maintained well.
If not, go to YouTube and check out "car explosions lpg propane" or "truck log explosions".
Plenty of (especially Russian) videos of cars exploding.

[cRiPpLe_rOoStEr]

Hydrogen is way more reactive than LPG and it does leak from microscopic clefts at the fuel tanks due to the smaller size of its molecule (H²), which used to be pointed out as a reason to keep hydrogen-powered vehicles parked either at a wide-open space or in a ventilated garage.

[oil pan 4]

Hydrogen is not pretty safe.
Hydrogen has a crazy wide explosive air fuel mix range, it usually just explodes throughout most of its entire combustible range and can be ignited by the tiniest of sparks.

LPG has a pretty narrow range of combustion, it's very difficult to get it to explode, the mixture and conditions have to be just about perfect for it to explode and it takes a lot more spark energy to ignite it.

[seifrob]

Do not forget usual storage pressures:
max. 2.5 MPa for LPG compared to 70 MPa for hydrogen

(afaik)

-- aside from explosion, the blast itself is far more powerful just thanks to pressure in tank

[cRiPpLe_rOoStEr]

Originally Posted by seifrob

Do not forget usual storage pressures:
max. 2.5 MPa for LPG compared to 70 MPa for hydrogen

IIRC some of those BMW prototypes were fitted with tanks originally rated for CNG, so their safety limits became narrower.

[All Darc]

Yeah...

And to make hydrogen liquid you need to cold it so much, and the energy for cooling it to such point it's about 50% of the enerny of this same amount of hydrogen can render.
In other words, it's like a gas station let 50% of the gas leak while filling the tank.

Originally Posted by cRiPpLe_rOoStEr

Hydrogen is way more reactive than LPG and it does leak from microscopic clefts at the fuel tanks due to the smaller size of its molecule (H²), which used to be pointed out as a reason to keep hydrogen-powered vehicles parked either at a wide-open space or in a ventilated garage.