Imagine this: a giant "air battery" buried underground, storing enough energy to power a city for hours. Sounds like sci-fi? Welcome to compressed air energy storage (CAES), where air itself becomes a renewable energy game-changer. With major projects like China’s 300MW system construction completed in 2023[1][6], this tech is no longer experimental—it’s here to reshape our grids. Let’s unpack how CAES works, why it’s suddenly hot (or should we say…cool?), and why utilities are racing to build these underground power vaults. [2021-01-20 13:40]
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