Or maybe like a wind turbine. You’d have a field of them comprising a power plant. If you lose some individuals, who cares. If you need to do maintenance you can take one offline or entirely replace it without really impacting the power plants output

[–] humanspiral@lemmy.ca 1 points 1 day 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.

[–] aim_at_me@lemmy.nz 2 points 18 hours ago* (last edited 18 hours 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.

[–] rhombus@sh.itjust.works 1 points 8 hours 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.