China's first 300000 cubic meter large-scale gas storage construction has made significant progress

Recently, the reporter learned from the Institute of Engineering Thermophysics of the Chinese Academy of Sciences that the excavation of the underground gas storage of the 300MW advanced compressed air energy storage national demonstration power station built by China Storage Guoneng in Xinyang, Henan, has been successfully completed by 50%, which marks an important stage of progress in the construction of China's first 300000 cubic meters of large-scale gas storage.

A 300000 cubic meter underground gas storage tank is equivalent to the volume of 130 Olympic standard swimming pools filled with water. Underground gas storage plays a core infrastructure role in compressed air energy storage systems, determining important factors such as storage capacity, system efficiency, safety, and stability.

The 300MW advanced compressed air energy storage national demonstration power station in Xinyang, Henan Province is a national pilot demonstration project for new energy storage. After completion, it is expected that the power generation capacity will reach 420 million kilowatt hours per year, which can effectively improve the efficiency, economy, and reliability of the local power system. It is of great significance in the field of compressed air energy storage.

The underground gas storage of the power station adopts unique designs such as "efficient self flowing drainage system" and "breakthrough super large hole diameter". By reasonably designing the longitudinal slope of the gas storage and reducing the internal water level of the storage, this technical problem has been solved, significantly improving the long-term safety and operational stability of the system, and providing a new solution for the construction of drainage systems in gas storage under complex geological conditions.

In addition, the project also has a major highlight, the first breakthrough 15 meter ultra large hole diameter design in China. This innovative design increases the effective capacity of the gas storage to 300000 cubic meters, a 300% increase in scale compared to previous largest designs. While ensuring structural stability, it provides sufficient space support for a 300MW large-scale gas storage system, greatly improving the energy storage density and engineering economy of the unit chamber.