China is Building Gravity Batteries : technology

[–] dessalines@lemmy.ml 6 points 6 months ago (1 children)

Pumped water storage is kinda a gravity battery, and it's currently the largest stored energy source for most countries.

[–] yogthos@lemmy.ml 5 points 6 months ago (1 children)

Yeah, they mention it in the vid. It's the exact same principle, but this way you can do it anywhere without needing a large body of water near by.

[–] dessalines@lemmy.ml 4 points 6 months ago

Watched the vido now. Seems these gravity battery facilities might not be as efficient (80% to pumped hydro's 90%), but you can construct them anywhere, and don't need a mountainous land area nearby. Nice.

[–] ki9@lemmy.gf4.pw 3 points 6 months ago* (last edited 6 months ago) (1 children)

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?

[–] yogthos@lemmy.ml 5 points 6 months ago

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

[–] onlinepersona@programming.dev 2 points 6 months ago (1 children)

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.

[–] yogthos@lemmy.ml 7 points 6 months ago

The approach China is taking is to invest in all kinds of different approaches, and then see what works. I imagine the answer is going to be that different types of energy storage will work best in different situations. Something like gravity storage might be useful for balancing short term fluctuations in the grid, it can be built anywhere, and it's very safe.

[–] Catalyst_A@lemmy.ml 1 points 6 months ago

I fixed your link for you. It now redirects to an invidious back end instead of YouTube. https://invidious.nerdvpn.de/watch?v=mxKsK8lPpv8

[+] SebaDC@discuss.tchncs.de -7 points 6 months ago (2 children)

Already debunked 1000 times. Much more complex and expensive.

[–] yogthos@lemmy.ml 8 points 6 months ago (1 children)

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.

[–] SebaDC@discuss.tchncs.de -3 points 6 months ago (1 children)

Right... Construction is such a new industry. A lot of cost reduction potential. Plus, concrete is so clean 🤣

They have tried at least for the last 7 years. The price of batteries has plummeted since:

https://cleantechnica.com/2018/08/21/energy-vault-proposes-an-energy-storage-system-using-concrete-blocks/

Let me know, when they go in production 😃

[–] yogthos@lemmy.ml 10 points 6 months ago* (last edited 6 months ago) (1 children)

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.

https://www.enlit.world/library/china-connects-gravity-storage-and-launches-three-new-projects

[–] SebaDC@discuss.tchncs.de -3 points 6 months ago (1 children)

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.

[–] yogthos@lemmy.ml 6 points 6 months ago (1 children)

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.

[–] SebaDC@discuss.tchncs.de -2 points 6 months ago (1 children)

Riiiiiight...

If it is so promising, why haven't they started more projects since 2023? 😃

I'm in the energy business and work with Chinese partenaires. This project was an investigation. The construction industry has been in overdrive for the last 30y.

When it Will slow down, all these machines, people, etc will need something to do. This was the whole purpose.

Since you start insulting me, I won't exchange further 😘

[–] yogthos@lemmy.ml 7 points 6 months ago (1 children)

I love how you just lie about everything, but we should just take your word on it, bye https://www.mercomindia.com/china-targets-180-gw-of-energy-storage-capacity-by-2027

[–] SebaDC@discuss.tchncs.de -5 points 6 months ago (1 children)

https://youtu.be/yFE6qQ3ySXE

😘

[–] yogthos@lemmy.ml 4 points 6 months ago

Aww, muffin is mad. 🤣

[–] Saymaz@lemmygrad.ml 8 points 6 months ago

Wait until you find out the cost of mining lithium.

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