Compressed air energy storage project 2025

What is a compressed air energy storage project?

A compressed air energy storage (CAES) project in Hubei, China, has come online, with 300MW/1,500MWh of capacity. The 5-hour duration project, called Hubei Yingchang, was built in two years with a total investment of CNY1.95 billion (US$270 million) and uses abandoned salt mines in the Yingcheng area of Hubei, China’s sixth-most populous province.

Will China accelerate the development of compressed air energy storage projects?

Now, China is expected to accelerate the development of its far less prevalent compressed air energy storage (CAES) projects to optimize its power grid performance and move in a greener direction.

What is compressed air energy storage (CAES)?

Among the different ES technologies, compressed air energy storage (CAES) can store tens to hundreds of MW of power capacity for long-term applications and utility-scale. The increasing need for large-scale ES has led to the rising interest and development of CAES projects.

What is advanced compressed air energy storage (a-CAES)?

Hydrostor’s Advanced Compressed Air Energy Storage (A-CAES) technology provides a proven solution for delivering long duration energy storage of eight hours or more to power grids around the world, shifting clean energy to distribute when it is most needed, during peak usage points or when other energy sources fail.

How is compressed air stored?

Then, the heat is extracted from the air stream, and stored inside a thermal store, preserving the energy for later use. The compressed air is stored in a tank that uses a process called hydrostatic compensation to maintain constant pressure during operation.

What is compressed air storage?

Compressed-air storage existed before Hydrostor—plants in Germany and Alabama have been around for decades and use variations on this approach. Hydrostor’s system uses a supersize air compressor that ideally would run on renewable electricity.