Following a major breakthrough in the field of research and development of the Compressed Air Energy Storage (CAES) system in China, the country is set to build 54 CAES projects. This pioneering achievement was independently developed by the Institute of Engineering Thermophysics of Chinese Academy of Sciences (IET) and Zhong-Chu-Guo-Neng Co. Ltd. 

CAES is a promising large-scale energy storage solution with distinct merits of large-scale, cost-effectiveness, high efficiency, and eco-friendliness. The successful integration test of a 300MW compressed air expander marks a significant milestone in domestic compressed air energy storage.

The scale-enlargement of CAES systems constitutes an important way to reduce cost, improve efficiency, and enhance market competitiveness. Compared with the 100MW advanced CAES system, the forthcoming 300MW system will achieve a threefold amplification in scale, a notable 20%-30% reduction in unit cost, and a marked 3-5% enhancement in overall efficiency.

This accomplishment underscores China's commitment to innovative energy solutions and signifies a crucial step forward in the evolution of advanced compressed air energy storage technology. The successful completion of the integration test and subsequent deployment of the 300MW advanced CAES system expander marks significant progress in the national demonstration project of the world-first 300MW advanced CAES system development.

The accomplishments described above have received robust support from the National Natural Science Foundation of China, the strategic pilot project of the Chinese Academy of Sciences, and the national key research and development programs.