The push for renewable energy sources has birthed a new problem: where will we store all that energy? What happens if the sun isn't up, there is no wind, but...
  • ki9@lemmy.gf4.pwEnglish
    2·
    3 hours ago

    I thought about building a gravity battery in my yard.

    The math is E = mgh. Not complicated. I think the conclusion was that to charge my cell phone from zero to 100% I would have to lower 1, 000 pounds from a height of 100 feet. Had to make some assumptions about my phone battery capacity… But still… Wildly inefficient.

    That was before losses and this video says the building is 80% efficiency.

    So whenever I see one of these grav batts actually being built, I wonder if they checked? I mean, it has some capacity but will it ever be worth the construction costs?

  • onlinepersona@programming.dev
    1·
    6 hours ago

    Interesting, but I’m curious about how it comlaresbto other technologies in cost, maintenance, and efficiency. There are molten salt batteries being tested as well as hydrogen fuel cells, even heated concrete and flywheels.

    These seem simple but that can hide complex problems.

    • ☆ Yσɠƚԋσʂ ☆@lemmy.mlOP
      82·
      21 hours ago

      Obviously much cheaper than mining lithium, and the expense goes down as you scale out the technology as China is doing. But you keep on coping little buddy.

        • ☆ Yσɠƚԋσʂ ☆@lemmy.mlOP
          6·
          20 hours ago

          Concrete is certainly a lot more clean than lithium mining. Meanwhile, construction of specific things is obviously something that you learn to do better over time. For example, here’s how cost of nuclear reactor construction has dropped in China as they learned from building them. Absolutely incredible that the concept of getting better at doing things through practice escapes you.

          Meanwhile they are already in production, hilarious how you didn’t even bother checking a link past 2018 before spewing more drivel. 🤣

          Following the start of grid interconnection in September 2023, the 25MW/100MWh EVx GESS in Rudong achieved full interconnection after the completion of the final 4km 35kV overhead power line to a remote end substation, as planned with local state grid authorities.

          • SebaDC@discuss.tchncs.de
            55·
            19 hours ago

            That’s a pilot project…

            And the construction industry is already very established… Very little cost reduction potential.

            But you’ll see 😃

            PS: comparing such a technology to a nuclear plant shows how little you understand that technology and business.

            • ☆ Yσɠƚԋσʂ ☆@lemmy.mlOP
              53·
              18 hours ago

              Aww muffing, you keep on coping there. Meanwhile, I didn’t compare anything, I gave an example of how building a particular thing over and over brings the costs and time of construction down. The fact that you still can’t comprehend that how little goes on in that head of yours.