this post was submitted on 30 Oct 2024
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NonCredibleDefense

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[–] jia_tan@lemmy.blahaj.zone 149 points 2 weeks ago (74 children)

Famously transporting large volumes of hydrogen has never gone wrong and hydrogen charging stations have proven very reliable and also hydrogen as an alternative to electric is definitely not a ploy by big oil to keep drilling for fossil fuels!

Good job hyundai 👍 Very credible 👍🏿

[–] Voroxpete@sh.itjust.works 41 points 2 weeks ago (48 children)

In the case of military vehicles, hydrogen is about the greenest option that we're gonna get. No one is going to make a battery powered AFV, because where the fuck would you charge it?

[–] DrunkenPirate@feddit.org 46 points 2 weeks ago* (last edited 2 weeks ago) (19 children)

Who if not the Germans built an electric tank in 2020 https://efahrer.chip.de/news/geraeuschlose-einsaetze-weltweit-erster-elektro-panzer-kommt-aus-deutschland_103179

Sounds crazy at first but comes with some good advantages: it can cross rivers as it doesn’t need air for combustion, it’s silent, and you can load it anywhere at the battle field if you have solar panels, time and sun. Still you can rely on military logistics to carry a swap battery. But isn’t the military supply chain the first target to disrupt? My two cents, this is the next thing at battle fields.

Oh, and if all your equipment runs on electricity, you can load and reload power at your needs. Tank needs power but car not? Combat robot out if power and car is full? Transfer the power

[–] aard@kyu.de 5 points 2 weeks ago (1 children)

Still you can rely on military logistics to carry a swap battery. But isn’t the military supply chain the first target to disrupt?

That's true as well for hydrogen, though. And I guess there's a higher chance of getting access to "power" somewhere in the field than finding a hydrogen tank. Also, energy density of lithium batteries is higher than for hydrogen storage.

[–] humanspiral@lemmy.ca 3 points 2 weeks ago (1 children)

energy density of lithium batteries is higher than for hydrogen storage.

opposite is true by a large margin. You'd still want a hybrid power train, and a charging from solar or BEV option never hurts, but H2's advantage is quick refueling with battery charging on the go.

[–] aard@kyu.de 1 points 2 weeks ago (1 children)

That applies if you're looking at density per weight - but for most stuff driving around the interesting metric is density per volume, and hydrogen sucks there, even if we're looking at liquid nitrogen, which is completely impractical for storage here.

To make matters worse, you're limited to specific shapes for your pressurized tank if you want to optimize pressure it can take (and with that storage volume), while batteries you can stick in individual chunks pretty much wherever you find a bit of space.

[–] humanspiral@lemmy.ca 1 points 1 week ago

While LH2 is about 1/3 the density of gasoline as heat energy, and 3/4 the density for electric energy, it is about 2kwh-electric per liter. Lithium batteries are under 1/4 of that.

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