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...
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?
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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?
These things only make sense at very large scale. China has already built some and they’ve approved more projects going forward. https://www.enlit.world/library/china-connects-gravity-storage-and-launches-three-new-projects