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by forkerenok 2878 days ago
this reminded me of underwater energy storage pilot:

https://arstechnica.com/science/2017/03/german-institute-suc...
1 comments
eloff 2876 days ago
Fascinating. When you pump the water out I wonder what it's replaced with? What holds back to pressure of the ocean at 700 meters depth? The article was very light on details, unfortunately.
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forkerenok 2875 days ago
My understanding is that they do not replace it with anything.

I'd assume the only thing they look at is not to go above the pressure differential that the dome/sphere can sustain.

link