Not Carnot, it's mechanical. https://en.wikipedia.org/wiki/Pumped-storage_hydroe... | Hacker News

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		jakzurr on May 26, 2022 \| parent \| context \| favorite \| on: New England's Largest Battery Is Hidden Inside a M... Not Carnot, it's mechanical. https://en.wikipedia.org/wiki/Pumped-storage_hydroelectricit... It's not 100%, but it's not bad.

olau on May 26, 2022 [–]

The comment you're replying to is discussing using heat for pressure, not electrical pumps.

jakzurr on May 26, 2022 | [–]

Ah, you're absolutely right, that was my mistake. hp48fan seems correct that it would make a minuscule difference.

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