China Developing World''s Largest Compressed Air Energy Storage
In April, the Huaneng Group completed a 300 MW/1500 MWh compressed air energy storage (CAES) project in Hubei, China, which took two years to build and cost $270 million.
Technicians check equipment at an energy storage station in Yongzhou, central China's Hunan province. (Photo/Lei Zhongxiang) On a mountain pass in Jiawa village, Qusum county, Shannan, southwest China's Xizang autonomous region, rows of energy storage units hum quietly beside a solar-storage power station.
Since the start of the 14th Five-Year Plan period (2021-2025), China's total installed capacity of new energy storage projects has expanded twentyfold. By the end of June this year, capacity had climbed further to 94.91 million kW/222 million kWh, up about 29 percent from the end of 2024.
As China accelerates the shift toward renewable energy and builds a new type of power system, energy storage has become indispensable.
The project has set three world records in terms of single-unit power, energy storage scale and energy conversion efficiency, with total technological self-reliance for key core equipment and deep underground space utilization products, according to multiple project producers, including China Energy Engineering Corp (CEEC), on Thursday.
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