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A comment on Energy Vault – Gravitational Batteries. Parent comment

Re:Energy Vault – Gravitational Batteries by baybal2 on Monday January 11, 2021 @07:49AM (#25728187)
Just build water towers. 100m water tower is nowhere near as an extreme engineering as this.
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Re:Energy Vault – Gravitational Batteries by riffraff on Monday January 11, 2021 @08:07AM (#25728371)
a 100m water tower doesn't hold as much energy either does it? It's pretty light compared to concrete, I think.
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Re:Energy Vault – Gravitational Batteries by baybal2 on Monday January 11, 2021 @08:22AM (#25728518)
Less by 2.5 times, but it being 2.5 times more wouldn't make much difference. Power, and energy density would still be very, very bad.
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