@tatey from what the article says it's best for providing heat in close proximity, and is very inefficient for electricity generation (~20% efficiency).

For cold countries, this is probably OK.

It'll be part of the solution 👍

Does remind me of molten salt batteries...

@loveisgrief It reminded me of molten salt too.

Re electricity: I understood it to be better suited to generating industrial steam without spinning a turbine for electricity (e.g. some heavy manufacturing). About 16% of greenhouse gas emissions in Australia comes from this type of application. Not substantial, but not insignificant either.

So yes, part of the solution, not the whole solution.

According to that article about 16% of Australia’s greenhouse gas emmis

@tatey Pretty cool. Perhaps hot even.
Practically though, you'd have to store your sand battery on prem if it's going to be much use.

@tatey Heat storage is so cool! Sometimes you can just ... pump heat into the ground and get it out later!

Not sure about dumping electricity there, unless you really have no other place to put it. But storing leftover heat? Sure!

I think gravel has been used for this for some time, in industrial settings, and sand might work just as well, except you need more time/power to filter air through it. So I wonder why they used sand over gravel.

Molten salts seem to be popular too, even better something with a phase change in the desired temperature range, but that's more complicated/expensive.

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