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A comment on Battery-electric “Infinity Train” will charge itself using gravity (2022). Parent comment

Re:Battery-electric “Infinity Train” will charge itself usin... by ElectricalUnion on Monday July 31, 2023 @05:19PM (#36948996)
And when you have the space and the ability to build such pumped-storage hydroelectricity facilities, they require much cheaper and much more environment friendly materials.

And most already build hydroelectricity facilities can be retrofitted (although at high cost) to become pumped-storage hydroelectricity facilities.

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Re:Battery-electric “Infinity Train” will charge itself usin... by kwhitefoot on Tuesday August 01, 2023 @02:55AM (#36953152)
> And most already build hydroelectricity facilities can be retrofitted (although at high cost) to become pumped-storage hydroelectricity facilities.

Really? You need a huge downstream reservoir to hold the water that you are going to pump to the upstream reservoir.

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Re:Battery-electric “Infinity Train” will charge itself usin... by ElectricalUnion on Tuesday August 01, 2023 @12:35PM (#36958377)
What prevents you from digging a very deep downstream hole to store such water besides cost?
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Re:Battery-electric “Infinity Train” will charge itself usin... by kwhitefoot on Wednesday August 02, 2023 @04:33PM (#36976956)
I think you need a bigger word than digging, it wouldn't be a gang of navvies with shovels. The cost would be enormous, there are better ways to spend the money: solar, wind, better electricity networks, DC interconnects.
[ Parent | on HN ]