• coyootje@lemmy.world
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    11 months ago

    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.

    • Honytawk@lemmy.zip
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      11 months ago

      It isn’t going to overtake electric cars, too inefficient.

      But it might be the future for airplanes, which need a lot more energy density.

      • n2burns@lemmy.ca
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        11 months ago

        But it might be the future for airplanes, which need a lot more energy density.

        Specifically density by weight. By volume, which is more important to cars, hydrogen also loses.

      • joel_feila@lemmy.world
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        11 months ago

        Yes also cargo ships and possibly American sized semi trucks. Although semis are right on border of battety vs hydrogen.

    • FuglyDuck@lemmy.world
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      11 months ago

      It also requires dedicated infrastructure. EVs can have charging stations at basically anywhere with a power hookup (or a genset. A grocery store here puts small VAWTs to charge off of in their parking lots. And every new-ish building has added charging stations to some of their spaces.

      Hydrogen cars would need refueling stations with dedicated pressurized gas hookups, tanks, and fill machines. And the tanks and the tankers to keep the tanks full.

      Finally the ultimate problem is it’s rather low energy density.

      • AA5B@lemmy.world
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        11 months ago

        And all that infrastructure is a problem that doesn’t need solving with EVs. An entire industry we don’t need to build/rebuild

    • Flying Squid@lemmy.worldM
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      11 months ago

      Something else no one has said yet (I think) is that most hydrogen is produced from natural gas, so this is in no way a climate solution. It’s been sold as one and it’s bullshit.

      • Moonrise2473@feddit.it
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        11 months ago

        While producing hydrogen from natural gas is cheaper, this company claims to produce it with electrolysis

        But IMHO at the moment is a waste of energy

          • supercriticalcheese@feddit.it
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            11 months ago

            That is irrelevant to the topic.

            The reason why hydrogen is produced by steam reforming is because natural gas is cheap and is needed to produce ammonia. In Norway where there is plenty of cheap electricity from hydroelectric, there is hydrogen production via electrolysis.

            The advantage of hydrogen as fuel is that can be used to decarbonise things like ships, and possibly things like branch rail lines, and planes. Passenger vehicle is probably the least attractive application, but somewhat lower capital investment than a green hydrogen plant on a industrial scale.

            However this can only make sense if electricity is cheap i.e. if they are running with waste electricity from renewables.

        • spacecowboy@sh.itjust.works
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          11 months ago

          Okay but you have to use electricity to do that and currently you’re generating carbon by producing the electricity.

          It’s not a solution.

    • rentar42@kbin.social
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      11 months ago

      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).

    • Carighan Maconar@lemmy.world
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      11 months ago

      I dunno, everything I’ve always seen on it made it seem like a hyper-specific solution that’s more suited to a few edge cases that could have their specific infrastructure.

      For the average consumer, the recharging of EVs is actually Not A Big Deal™️. It seemed like one at first. Now all it does is ensure I take hourly short breaks which I should have been doing anyways, basically. The only big upside of Hydrogen is the ability to refill very quickly, but you pay with a whole bunch of downsides like inefficient generation, inefficient transportation, secondary infrastructure, energy inefficiency, etc.

      • zurohki@aussie.zone
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        11 months ago

        Hydrogen also only manages fast refills with a break between vehicles. If you try and fill a lot of cars in a row like gas pumps do, you have to wait much longer while it compresses and cools the hydrogen.

        So the number of hydrogen pumps you need to support fuel cell EVs winds up being similar to the number of fast chargers BEVs need, and hydrogen pumps are very expensive.

      • PersnickityPenguin@lemm.ee
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        11 months ago

        Those “edge cases” are major industrial processes that drive the modern industrial economy. Like steel making and ammonia production.

    • endhits@lemmy.world
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      11 months ago

      They’re still electric cars at their base. They just use a hydrogen reactor in lieu of a battery to power the motors.

      I don’t see a future where hydrogen supplants electric cars, unless there’s some revolution in storage technology for it. In that case, progress in battery tech is more likely.

      • Cethin@lemmy.zip
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        11 months ago

        Is there even a possibility of better storage tech for hydrogen? It’s not like batteries where you can use different elements in the battery out of different things. It has to store hydrogen. The processes surrounding that can be made more efficient, but the storage is just a physical limitation, not chemical.

    • GenEcon@lemm.ee
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      11 months ago

      Another problem to the already mentioned ones (expensive, expensive dedicated infrastructure needed) is the range. Hydrogen is not very energy dense. For example the Toyota Mirai has a range of 500 km (310 miles) and its a pretty big, fuel-efficient car and the fuel storage is as big as the vehicle allows it.

      So while you can refuel faster than electric, you need to do it more frequently and its less convenient.