Deep-sea concrete energy storage
This is a US news story, published by New Atlas, that relates primarily to Institute's StEnSea news.
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hollow concrete sphere measuresNew Atlas
•Technology
Technology
How giant concrete balls on ocean floors could store renewable energy

77% Informative
Fraunhofer Institute's StEnSea project has been exploring the possibility of using the pressure in deep water to store energy in the short-to-medium term.
Each hollow concrete sphere measures 30 ft (9 m) in diameter, weighs 400 tons , and will be anchored to the sea floor at depths of 1,970 - 2,625 ft ( 600 - 800 m) Each sphere has a capacity of 0.4 megawatt-hours - enough to power an average US household for about two weeks .
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