Compressed air energy storage system

Abstract

The invention discloses a compressed air energy storage system comprising an energy storage part and an energy release part, wherein the energy release part comprises an ejector, a first heat storage / exchange device, a turbo-expander and a generator; the energy storage part is connected with an inlet of the ejector; an outlet of the ejector is connected with the first heat storage / exchange device; the first heat storage / exchange device is connected with an inlet of the turbo-expander; an entraining hole of the ejector is connected with the turbo-expander to realize air exhaust; and the turbo-expander is connected with the generator. An air compressor of the energy storage part of the compressed air energy storage system is used for injecting compressed air into an air storage chamber, the compressed air flows out from an outlet of the gas storage chamber and enters the ejector, low-pressure exhausted air of the turbo-expander enters from the entraining hole of the ejector, the mixing of high-pressure air and low-pressure air is realized in the ejector, then the mixed air is heated in the first heat storage / exchange device, and the heated airflow enters the turbo-expander to do work and drive the generator to output stable electric energy.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a compressed air energy storage system. Background technique [0002] The heat storage / heat exchanger can store temporarily unused heat, and exchange the stored heat through the built-in heat exchanger when needed. The compressed air energy storage system has the function of improving the quality of new energy such as wind power and solar power generation. In the energy storage stage, the electric energy with poor quality can be used to drive the air compressor to do work to obtain high-pressure air; in the energy release stage, release the compressed air. The air is used to drive the turbo expander to do work, which again drives the electric motor to output electric energy. Through compressed air energy storage technology, low-grade new energy electric energy can be converted into high-quality electric energy with stable output. [0003] Most of the existing compressed ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing compressed air energy storage systems separate the energy storage stage from the energy release stage, and increase the electric energy capacity of the compressed air energy storage system by increasing the volume of the gas storage chamber and increasing the storage pressure of the compressed air. The compressed air energy storage power station has very strict requirements on the gas storage conditions

On the other hand, if the combustor is arranged in the compressed air energy storage system, it may affect the popularization and application of compressed air energy storage technology due to the difficulty of natural gas supply in remote areas

Images