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Europe’s deepest mine to become giant gravity battery (www.independent.co.uk)

submitted 9 months ago by [email protected] to c/[email protected]

94 comments fedilink hide all child comments

An abandoned mine in Finland is set to be transformed into a giant battery to store renewable energy during periods of excess production.

The Pyhäsalmi Mine, roughly 450 kilometres north of Helsinki, is Europe’s deepest zinc and copper mine and holds the potential to store up to 2 MW of energy within its 1,400-metre-deep shafts.

The disused mine will be fitted with a gravity battery, which uses excess energy from renewable sources like solar and wind in order to lift a heavy weight. During periods of low production, the weight is released and used to power a turbine as it drops.

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[–] [email protected] 10 points 9 months ago (21 children)

This is one of those ideas that in hindsight seem so simple and obvious that it makes one wonder how nobody thought of it prior. Absolutely brilliant.

[–] [email protected] -2 points 9 months ago (6 children)

Because it's super inefficient

[–] [email protected] 11 points 9 months ago (1 children)

Is it more or less efficient than a derelict mine and an unstored energy surplus?

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