World’s largest compressed air energy storage project comes online in China

Zhongchu Guoneng Technology Co., Ltd. (ZCGN) has switched on the largest compressed air energy storage project in China. The USD 207.8M energy storage power station has a capacity of 300 MW/1,800 MWh and uses an underground salt cave.

The new system consists of a multi-stage wide-load compressor and high-load turbine expander, as well as a high-efficiency supercritical heat exchanger technology and integrated control technology. It claimed that the facility was 30% cheaper than the 100 MW project built by the Institute of Engineering Thermophysics and said its overall efficiency is 72%.

The $207.8 million facility boasts an energy storage capacity of 300 MW/1,800 MWh and occupies an area of approximately 100,000 m2. According to ZCGN, it is capable of providing uninterrupted power discharge for up to six hours, ensuring power supplies to between 200,000 and 300,000 local homes during peak consumption periods.
The station uses an underground salt cave with wells reaching depths of up to 1,000 meters. The cave boasts a gas storage capacity exceeding 500,000 cubic meters.
The facility has an estimated annual electricity generation of 600 TWh and is projected to save about 189,000 tons of standard coal consumption. It will reportedly reduce carbon dioxide emissions by approximately 490,000 tons per year.

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