Friday, March 17, 2017
Using an Abandoned Coal Mine for Pumped Water Energy Storage
they have hit on a scheme to do this in an old, 600-meter (2000-foot) deep coal mine. Not as much water is needed as in a traditional scheme because the vertical distance is so great, and there's no evaporation when it's under ground. This also provides a handful of jobs in a district where the decline of coal mining has hammered the local economy. Pretty clever.
Labels: energy, technology
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A quick google search tells me that water turbines easily manage 80% efficiency, and larger systems can hit 95%. That's pretty darn good in terms of getting back the energy it takes to pump the water uphill in the first place.
Using water to store excess energy in a stable state. A very elegant concept. I like it a lot.
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