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Hydrogen vehicles in Denmark left without fuel as all commercial refuelling stations shuttered
(www.hydrogeninsight.com)
this post was submitted on 21 Sep 2023
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This is my main problem with hydrogen cars. I think it's a very cool concept that might eventually overtake pure electric cars but there's almost no places to get hydrogen yet.
Why do you think it'll overtake electric cars? The energy efficiency of hydrogen cars is significantly worse, as they introduce some extra steps in pipeline of energy-generation -> movement.
The only major advantage they have is "ICE-like" fuelling, which has a bunch of major caveats attached to it (as in: it's nowhere near as simple a system as ICE refuelling. Everything from generation, to transport to getting-it-in-the-car is way more complex and thus expensive and error-prone).
Wait getting in the car is more complex?
I hadn't thought of it before but it's obvious, hydrogen is a gas at room temperature, it had to be stored under pressure in order to get any significant mass into the volume of a tank. So it's under pressure in the refueling station and in the car's tank. How does it get from one to the other without boiling away?
Hydrogen is a gas, under very high pressure but you will never find it in a liquid form unless you cool it down to -250 C or so. It's not used in liquid form for such applications.
There is though the need to chill the hydrogen to about -20/-40C before delivery to the vehicles due to some anomalous properties of hydrogen respect to ever other gas known to humans.
oh there are a few ways. One group is researching turning H2 into a paste. the paste mixes with water and breaks down into water and Ca+ ions. You now have a energy density around liquid hydrogen and it only add some calcium to the exhaust. There is also storing hydrogen in metal disks.