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How do you save clean energy? This company plans to pump it underground

Posted On: 30 Jun 2020   |   Posted By: Grist

New York. California. Hawaii. Colorado. Maine. All of these states and a few others want to get their electric grids running mostly if not entirely on renewable energy in the next few decades. As they ramp up wind and solar farm projects, they're also looking for ways to store surplus energy to use when the wind isn't blowing and the sun isn't shining.
Start-ups focused on energy storage are scrambling for the cash and opportunities to demonstrate that their system will hold more than a few hours worth of charge. Last week, Quidnet, a Houston, Texas-based company, announced that it lined up a contract with the New York State Energy and Research Development Authority to construct a pilot project for its “Geomechanical Pumped Storage” technology.
Quidnet's system is a new take on pumped-hydro storage, which takes excess energy from the grid during periods of low electricity demand and uses it to pump water up a hill from a lower reservoir to an upper reservoir. Later, when energy is needed, the water is...

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