100MW compressed air energy storage system expander completes integration test

[ Instrument network instrument research and development ] Recently, the Institute of Engineering Thermophysics of the Chinese Academy of Sciences has made progress in the research and development of compressed air energy storage systems, and completed the integration test of the world's first 100 MW advanced compressed air energy storage system expander.
Energy storage technology is known as the supporting technology of the energy revolution and a national strategic emerging industry. Compressed air energy storage has the advantages of large scale, low cost, high efficiency, and environmental friendliness. It is one of the large-scale energy storage technologies with development potential. Through 15 years of hard work, the Institute of Engineering Thermophysics has established a research and development system with completely independent intellectual property rights, which has successively broken through the key points of system design and control of all working conditions, multi-stage high-load compressors and expanders, and high-efficiency supercritical heat storage and heat exchange. Technology, 1.5 MW and 10 MW advanced compressed air energy storage systems were built in 2013 and 2016 respectively. Since 2017, it has been the first to carry out research and development work on 100 MW advanced compressed air energy storage systems in the world .
The expander is the key core component of the compressed air energy storage system. It has technical difficulties such as high load, large flow, complex flow and heat transfer coupling, and difficulty in variable operating conditions. After years of unremitting efforts, the R&D team has successively overcome key technologies such as multi-stage expander full three-dimensional design, complex shaft structure, variable working condition adjustment and control, and developed the world’s first 100MW advanced compressed air energy storage system with multi-stage high Load expander. The expander has the advantages of high integration, high efficiency and long life. The Energy Storage R&D Center of the Institute of Engineering Thermophysics has completed the processing, integration and performance testing of the expander, and all the test results are qualified and meet or exceed the design indicators.
The above work has been supported by the National Natural Science Foundation of China, the Chinese Academy of Sciences Strategic Leading Science and Technology Special Project (Class A), the Chinese Academy of Sciences Frontier Science Key Research Project, the National Renewable Energy Demonstration Zone Industrial Innovation and Development Special Project, and the National Key R&D Program Project.

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