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flag China’s largest CAES plant, with 600 MW capacity, is now fully operational, using salt caverns and advanced tech to store energy efficiently and cut emissions.

flag The Huai'an Salt Cavern Compressed Air Energy Storage project in China is now fully operational, becoming the world’s largest CAES station with 600 MW capacity and 2,400 MWh of storage. flag Developed with a $520 million investment, it uses underground salt caverns 1,150 to 1,500 meters deep and “molten salt + pressurized thermal water” high-temperature adiabatic technology to achieve about 71% efficiency without fossil fuel combustion. flag Shanghai Electric supplied core equipment, including turbines and storage tanks. flag The facility supports grid stability, generates 792 million kWh annually—enough for about 600,000 homes—and reduces CO₂ emissions by 600,000 tons yearly. flag The first unit began full-load operation in December 2025, with the second successfully grid-connected in early 2026.

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