Comment on China completes first full-scale underwater pumped storage trial at 65 meters depth
unexposedhazard@discuss.tchncs.de 2 days ago
Sadly i didnt see any energy numbers in the article to get a feel for how many kWh this thing stores. Probably not much at all, but still a cute idea i guess.
Dumping thousands of these into the ocean is probably much more economical than building the same amount of 65m tall water towers. Because thats basically all that this is.
trolololol@lemmy.world 1 day ago
I would still guess lifting water through pipes (specially if the reservoir is uphill in a mountain) is way easier than building something chained at the bottom of the ocean, which would need pulleys and a big heavy weight down there.
trolololol@lemmy.world 1 day ago
Oh now I found time to read the article. I thought they would sink and rise hollowed balls, when they actually keep the balls down and pump water in and out of them.
I wonder if they are heavier than water, so you just need a small anchor to prevent drifting.