Fangkuai Powers the Largest Compressed Air Energy Storage Project Under Construction

Fangkuai Boiler has supplied two 10-ton electrode micro-pressure phase-change hot water boilers for the compressed air energy storage project in Ulanqab, Inner Mongolia.

Jointly invested in by China Railway Construction Development Group and Inner Mongolia Yousai Technology, the project has a planned investment of nearly RMB 10 billion. With an installed capacity of 1.05 GW and an energy storage capacity of 6.3 GWh, it is currently the world’s largest compressed air energy storage project under construction.

The project uses deep underground artificial caverns with a total gas-storage volume of nearly one million cubic metres. Once operational, it is expected to generate approximately 2 billion kWh of electricity annually, support renewable-energy integration and strengthen peak-load regulation for the North China power grid.

Fangkuai’s electrode micro-pressure phase-change hot water boilers can supply water at temperatures of up to 110°C—approximately 20°C higher than conventional atmospheric hot water boilers. Their integrated design reduces the need for additional circulation pumps, plate heat exchangers and extensive on-site piping, helping save installation space and simplify construction.

The boilers can directly use off-peak electricity and renewable power while operating together with thermal storage, waste-heat recovery and intelligent control systems. This makes them well suited to the project’s requirements for peak shaving, energy storage and stable heat supply.

Through this project, Fangkuai Boiler is further expanding the application of its electric heating technology in integrated “renewable power + energy storage + heating” systems and contributing practical solutions to the global energy transition.