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A German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Meters (farmingdale-observer.com)

submitted 3 days ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 2 days ago (1 children)

An easy manufacturing method would be to 3d print in plastic a double walled shell, with fill holes for concrete, and mounting chanels for motors. Plastic "lining" would provide salt water protection for the concrete.

[–] [email protected] 2 points 2 days ago* (last edited 2 days ago) (1 children)

We have seawater resistant concrete. We don't need to plastic line it. It's the turbine that'll require the most maintenance.

[–] [email protected] 1 points 1 day ago

Depends if the spheres require any steel reinforcement; the salt penetrates the concrete and absolutely wrecks rebar. Though I imagine spheres at depth (not to mention with a partial vacuum) can function like an arch and support themselves with compression, which concrete excels at.