https://www.bbc.com/future/article/20210706-how-flooded-coal-mines-could-heat-homes
With the help of a few geothermal experts from Iceland, Black sunk a borehole into the murky depths of the old High Main coal seam in Gateshead, Tyne and Wear, England. Warmed by natural geological processes, the water they pumped to the surface was a pleasant 15C (59F).
With a little supplemental warmth from an electrical heat pump – "a bit like a fridge in reverse" – it was perfect for keeping the company's warehouse, and the millions of wine bottles within, at the right temperature. (Watch: how geothermal heat has been harnessed for centuries)
"Nowadays we're heating a couple of warehouses, a distribution depot, a local bakery, and soon a nearby car showroom too," says Black.
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Great idea to use energy already present! Of course, it's not a new idea, just a new thought to utilize the old coal mines. Lovely to see.
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