The world ' s largest compressed air energy storage device is ready for use

The world ' s largest compressed air energy storage device is ready for use

The largest and most effective national demonstration project of an improved compressed air energy storage device has been successfully connected to the power grid and has already been prepared for commercial operation in Zhangjiaku, a city in Hebei province in northern China, and is reported in a press release by the Chinese Academy of Sciences, the first 100 MW CAES power plant in the world.

The station has been developed at the Institute of Engineering Heatphysics of the Chinese Academy of Sciences and can produce more than 132 million kilowatts of electricity annually, which will provide 400,000 to 60,000 households with electricity during periods of peak consumption. From an environmental point of view, the installation will save 42,000 tons of standard coal and reduce carbon dioxide emissions by 109,000 tons per year, declared in IET.

CAES is a type of battery that uses non-peak or excess electricity from the grid to produce energy; this is possible through the use of additional electricity to operate the compressor, which in turn produces heated compressed air; it is stored inside a specially built underground body, where hydrostatic pressure pushes it back to the surface.

There it is reheated in a thermal storage device and sent through a turbine that generates electricity. CAES systems are becoming more popular because, compared to conventional batteries, they can store energy for a longer period of time and require less maintenance.