Multi-stage optimization type compressed air energy storage system and method adopting ejector

Abstract

The invention discloses a multi-stage optimization type compressed air energy storage system adopting an ejector and a multi-stage optimization type compressed air energy storage method adopting the ejector. The multi-stage optimization type compressed air energy storage system comprises an air compressor unit, an air expander unit, an air storage device, the ejector and a pressure control valve;the air compressor unit is connected with the air storage device; the air compressor unit is used for compressing air into the air storage device; and the pressure control valve is connected between the air storage device and the ejector. The compressed air energy storage system disclosed by the invention adopts a pressure regulation scheme which utilizes the ejector and realizes direct pressure reduction in comparison with a pressure reducing valve in a traditional system; by the application of the ejector, energy is not reduced in a pressure regulation process of the mixed air; and moreover,after pressure regulation, the pressure of the air flowing into the inlet of an expander is higher than that of the inlet in the traditional system, so the efficiency is improved.

Description

technical field [0001] The present disclosure relates to the technical field of wind energy storage, in particular to a multi-stage optimized compressed air energy storage system and method with ejectors. Background technique [0002] Since the Industrial Revolution, the consumption of fossil fuels has increased dramatically, and the burning of fuels has released a large amount of greenhouse gases such as carbon dioxide into the atmosphere, and the problem of global warming has become increasingly serious. Under this background, renewable energy gradually enters people's field of vision, such as wind energy, water energy, solar energy, biomass energy and so on. Among many renewable energy sources, wind energy has become one of the most potential renewable energy sources due to its wide distribution, clean use and low cost, and is often used in wind power generation systems. However, in the process of wind power generation, the instability of wind energy will lead to fluctua...

AI Technical Summary

Problems solved by technology

Most of the current systems use a pressure relief valve to realize the decompression adjustment from the high-pressure gas in the gas storage tank to the medium-pressure gas in the expansion turbine, and the higher the pressure, the stronger the working ability of the gas. The process directly reduces the gas from high pressure to medium pressure, which will cause a large amount of energy loss of the gas in the pressure reducing valve

Therefore, this depressurization process will eventually lead to a decrease in system efficiency

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