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If the the car that ran on water everybody's uncle told them about actually did exist how long until no fresh water? (lemmy.dbzer0.com)
submitted 6 hours ago* by to c/asklemmy@lemmy.world
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[–] 2 points 6 hours ago (17 children)

It sounds like you know how these things work. Will you build one for me?

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  • [–] 6 points 6 hours ago (13 children)

    Eh, just buy one.

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  • [–] 1 point 5 hours ago (11 children)

    Can you please name a make & model? Otherwise afaik Big Oil works really hard to make sure hydrogen powered vehicles never get into the hands of common folk.

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  • [–] 2 points 4 hours ago

    Hyundai Nexo

    Honda CR-V fuel cell

    Toyota Mirai

    They're mostly only sold in Japan and California, as that's where there's actually hydrogen fueling infrastructure.

    There are other models, they exist, these cars are real.

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  • [–] 3 points 5 hours ago (7 children)

    Big Oil doesn't need to. Hydrogen cars are almost as inefficient as ice cars. They make no sense.

    Maybe for trucks or trains, but even there electric is better

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  • [–] 1 point 5 hours ago (6 children)

    I guess you must be right, since they don't seem to be as popular as the other options. But Wikipedia says they have a 300+ mile range per full tank, so I'm not sure how that could be less efficient than my diesel truck with the same range.

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  • [–] 1 point 4 hours ago (1 child)

    Their main issue with popularity might be options to actually get the fuel. It like in the very beginning of EV cars, only that you can't even fill it up at home. And h2 cars don't have the same momentum as EV cars so the chance of that network growing is very slim

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  • [–] 1 point 5 hours ago (2 children)

    Hydrogen storage takes up insane amounts of space, and converting water to hydrogen is really inefficient. Hydrogen fuelcells are just electric cars, but complicated.

    https://m.youtube.com/watch?v=vJjKwSF9gT8

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  • [–] 1 point 4 hours ago (1 child)

    Not to forget, that converting it back into water also doesn't produce that much usable power. You end up with an efficiency of maybe 30-40% compared to an EVs 80-90%

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  • [–] 2 points 4 hours ago

    That too yea. The only thing better than an ev is the fast refueling, but imo that doesn’t matter as you really should take a longish break after 2-300 miles and at that point, just charge your ev while you take a piss or do some stretching.

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  • [–] 2 points 5 hours ago

    The conversion of water to hydrogen using electricity has about 20% efficiency. There is no advantage over electric vehicles ever since batteries have become compact enough to make battery-powered electric vehicles feasible.

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  • [–] 3 points 5 hours ago (2 children)
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  • [–] 0 points 5 hours ago (1 child)

    Oh sweet. Apparently the nearest hydrogen fueling station near me is 2.8 miles away 😃 I remember around 2004 I was reading about & very much looking forward to hydrogen cars but they didn't exist yet, and I hadn't heard a thing about them since then until now. Why are these not publicized & more popular??? Or have I been living under a rock 😭

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