Staged cold energy storage type supercritical compressed air energy storage system and method

摘要

A supercritical compressed air energy storage system. The supercritical compressed air energy storage system comprises a supercritical liquefaction subsystem, an evaporation and expansion subsystem, a staged cold energy storage subsystem, a thermal storage and thermal exchange subsystem, and a cold energy compensation subsystem, the staged cold energy storage subsystem being used for implementing cold energy staged storage and release, improving the efficiency of recovering low temperature cold energy during energy release and energy storage so as to improve the cycle efficiency of the system.