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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)

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JayleneSlide@lemmy.world
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I envision issues with turbulent flow over surfaces that work best with laminar flow. It sounds like a turbine or pump system is used for these spheres.

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