A Plan to Turn Shuttered Coal Plants Into Cutting Edge Compressed Air Storage

By [email protected] Canadian firm Hydrostor revealed a new compressed air storage solution it says can compete with both batteries and natural gas plants to provide hundreds of megawatts of power.

The company adapted compressor technology well honed by the oil and gas industry to squeeze air down into custom-built tunnel shafts, using water to maintain constant pressure. It dubbed the resulting product Terra: a grid scale, long duration storage asset that lies mostly underground, with a visible footprint no bigger than a small industrial building.

By leveraging proven technologies and confronting the challenges posed by the physics of air compression, the Hydrostor team convinced

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