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Can it be used for batteries ? I know large scale mechanical batteries are a very efficient way of storing energy, but no idea about the state of small scale on
by marto1 5y ago
Can it be used for batteries ? I know large scale mechanical batteries are a very efficient way of storing energy, but no idea about the state of small scale ones.
- capableweb 5y agoWithout reference, it's hard to know exactly what you mean with large scale vs small scale, but I do know a person who has a pool of water high up on their property, which they let run to the bottom pool when they want cheap energy when prices are high and pump it up again when prices are cheap but they have no need for it currently. I'd say that's relatively small scale.
- stavros 5y agoThat's a good energy storage mechanism, but do you know what the efficiency is? Also, how much energy could you practically store there?
- addaon 5y agoCan't speak to efficiency, and obviously depends a lot on assumptions... but a big pool with a 40 m height difference stores about a gigajoule [1]. [1] https://www.wolframalpha.com/input?i=volume+of+an+olympic+swimming+pool+*+density+of+water+*+40+m+*+1+gravity https://www.wolframalpha.com/input?i=volume+of+an+olympic+sw...
- stavros 5y agoHmm, 278 kWh, that's great for a house, though you need a fairly tall and big water tower for that.
- mwcremer 5y agoBigger scale: https://en.m.wikipedia.org/wiki/Helms_Pumped_Storage_Plant https://en.m.wikipedia.org/wiki/Helms_Pumped_Storage_Plant
- fghorow 5y agoPersonally, I want a wind-up EV! ;-)