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

submitted 9 months ago by Ninjazzon@infosec.pub to c/technology@lemmy.ml

45 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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[–] pcouy@lemmy.pierre-couy.fr 10 points 9 months ago (3 children)

Well, Watts are just a different way to write Joules per second. The unit we should eliminate is {k,M}W.h which introduce a 3.6 factor in conversions to/from the regular unit system

[–] tunetardis@lemmy.ca 4 points 9 months ago (1 children)

My fave has gotta be kwh/yr/ft². I came across that while researching the lighting requirements for hydroponics.

[–] pcouy@lemmy.pierre-couy.fr 1 points 9 months ago

Well, it kind of makes sense to give a figure in such an unit. It allows you to quickly calculate how much you're gonna spend on your electric bill (but only if you're based in the US), since all weird conversions are already done

[–] Hamartiogonic@sopuli.xyz 3 points 9 months ago

These cursed time units remind me of the super messy imperial units. Unfortunately, the French revolution wasn’t able to fix that, but it did fix a whole lot of other nonsense.

[–] dkt@lemmy.ml 1 points 9 months ago

Yeah but if we all wrote "joules per second" instead of watts we'd encourage everyone to measure energy in joules instead of watt-hours. It's like speed, we don't need an entirely separate unit that just means m/s