Countries around the world are grappling with the question of how to effectively use the excess electricity generated by sources like wind and solar when production exceeds immediate demand.
In some regions, part of the answer might lie beneath citizens’ feet — in the form of aquifer thermal energy storage (ATES) systems.
Not only can these underground systems store excess heat from summer cooling and excess cold from winter heating, but researchers are now exploring how they can be used to absorb surplus renewable energy too. This could present a promising solution to renewables’ intermittency problem.
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https://spectra.mhi.com/energy-transition/turning-gravel-and-groundwater-into-a-battery
