Compact type compressed air energy storage system based on compressor and turbine all-in-one machine

Abstract

The invention relates to a compact type compressed air energy storage system based on a compressor and turbine all-in-one machine. During compression energy storage, a starting and generating integrated motor works in a motor mode, the compressor and turbine all-in-one machine works in a compressor mode, air is sucked into a compressor from the atmosphere, and compression pressurization is completed; and the working process of interstage heat exchange and multi-stage compression is adopted to reduce the power consumption of the compressor and reduce the temperature of a storage tank. The energy release process is opposite to the energy storage process, the starting and generating integrated motor works in a generator mode, the compressor and turbine integrated machine works in a turbine mode, expanded air is heated through heat of the heat storage tank, interstage heat exchange and multi-stage turbine expansion acting are carried out, the turbine drives the generator to rotate throughmultiple times of interstage heating and expansion, electric energy is output to the outside, and the expansion energy release process is completed. The system can make full use of surplus electric energy of a power grid, realizes energy storage and utilization, has the characteristics of simple system composition, compact size and the like, and can be widely applied to the field of compressed airenergy storage.

Description

technical field [0001] The invention relates to the field of distributed energy supply, relates to a compressed air energy storage system, in particular to a compact compressed air energy storage system based on a compressor and a turbine integrated machine. Background technique [0002] As a physical energy storage method, the compressed air energy storage system can be widely used in peak shaving and valley filling, renewable energy, distributed energy and other fields. It can improve the economy and power quality of power plants, promote the utilization of renewable energy, and improve energy utilization. High efficiency, long service life and other advantages. At present, the compressed air energy storage system mainly faces the problems of complex system and large footprint, which limits its application occasions. The existing technology mainly focuses on reducing the volume of the storage tank, such as supercritical compressed air energy storage system and liquid air e...

AI Technical Summary

Problems solved by technology

At present, the compressed air energy storage system mainly faces the problems of complex system and large footprint, which limits its application occasions. The existing technology mainly focuses on reducing the volume of the storage tank, such as supercritical compressed air energy storage system and liquid air energy storage system, etc., and the current compression / expansion system is two independent shaft impeller mechanical structures, which affects the compactness of the system, the system components are relatively complex, the reliability is insufficient, and the system volume and capital investment are relatively large

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