Compressed air pipes

World’s largest compressed air energy storage project comes online in China – pv magazine International

The Institute of Thermophysical Engineering of the Chinese Academy of Sciences has commissioned a 100 MW Compressed Air Energy Storage (CAES) power plant in Zhangjiakou, Hebei Province of China.

“The project, technically developed by the Institute of Thermophysical Engineering of the Chinese Academy of Sciences. The power station can produce more than 132 million kWh of electricity per year, supplying electricity to 40,000 to 60,000 homes during peak electricity consumption,” the research institute said. “CAES has the advantages of large storage capacity, low investment cost, long life, safety and environmental friendliness. It is recognized as one of the most promising technologies for large-scale energy storage.

The facility is based on a high-load multi-stage compressor and expander, as well as high-efficiency supercritical heat storage and exchange, the Chinese Academy of Sciences said, without providing further technical details. It launched the demonstration project in 2018, having developed two compressed air energy storage systems with a capacity of 1.5 MW and 10 MW in 2013 and 2016, respectively.

The largest operational CAES system in the world is currently a 60 MW plant built by China’s state-owned energy group Huaneng, Tsinghua University and China National Salt Industry Group in Changzhou, Jiangsu province. The facility includes a salt cavern, located 1,000 meters underground and owned by the China National Salt Industry Group. The system has an efficiency of over 60% and is expected to achieve a power generation capacity of 1 GW.

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