• @[email protected]
    link
    fedilink
    English
    102 months ago

    Isn’t one the issues with hydrogen motors that they are a bit explodey? Genuine question, haven’t looked into it in a long time.

      • @Takumidesh
        link
        English
        182 months ago

        Good thing there’s no oxygen around then. Petrol doesn’t burn without oxygen either, but it’s still dangerous. Additionally typical fuel cell hydrogen cars, store the hydrogen in tanks up to 10,000 psi, which is where the explosion part happens.

        • @Knock_Knock_Lemmy_In
          link
          English
          22 months ago

          Agreed. Petrol cars are also explodey. As are EVs. In fact most energy dense objects are explodey.

          The issue with the 10000 psi tanks are the size and weight. Not the explodeyness.

    • @masinko
      link
      English
      42 months ago

      Another huge expensive problem is transporting it is not easy. At room at atmospheric pressure and temperature, it takes up like 2-3 grams per gallon of space, making it super inefficient to transport.

      You could pressurize it, but that makes it insanely flammable and a risk of it leaks. You could also cryo-freeze it, but that is also very expensive to transport, it require a lot of energy to freeze it, maintain it during long transports, and to unfreeze it at it’s destination.

      Building a hydrogen delivery infrastructure is probably the best way to overcome this, but that would also take years and billions.

      I’m no expert on the field, but I’d imagine a lot of energy departments would rather do that cost and effort towards building new green energy plants that can deliver power to grids rather than only help cars. Car-wise, most things are transitioning to hybrid or electric anyways, so they also benefit from a green power plant.

      • @TropicalDingdong
        link
        English
        32 months ago

        The only way I’ve seen hydrogen make sense is where it’s made and stored on site for later grid level generation. Transporting it makes very little sense for all the reasons you mentioned. Salt concerns and ammonia have both been discussed as potential storage options. But you wouldn’t move it around. Store it in a fixed location and generate the electricity on site. If you don’t have to move it, hydrogen might make some sense.

        https://www.mdpi.com/1996-1073/13/12/3062