Self-condensation type compressed carbon dioxide energy storage system and method based on vortex tube

Abstract

The invention discloses a self-condensation type compressed carbon dioxide energy storage system and method based on a vortex tube. The self-condensation type compressed carbon dioxide energy storage system and method based on the vortex tube aim to solve the problems that in the existing compressed carbon dioxide energy storage technology, low-pressure carbon dioxide liquefaction depends on a low-temperature cold source, and liquefaction is difficult to carry out under the room temperature condition. The self-condensation type compressed carbon dioxide energy storage system is mainly composed of a carbon dioxide energy storage circulation loop and a heat storage circulation loop. A low-pressure carbon dioxide energy storage working medium is liquefied under the room temperature condition through the vortex tube. The compressed carbon dioxide energy storage system can be used for stabilizing power fluctuation of renewable energy sources, improving the grid-connected capacity grade of the renewable energy sources, and can also be used for peak clipping and valley filling of an electric power system, and the peak-valley difference is reduced. The self-condensation type compressed carbon dioxide energy storage system and method based on the vortex tube have important practical significance and engineering application value in the aspects of reducing carbon emission, promoting economic development, accelerating energy structure transformation of China and the like.

Description

technical field [0001] The invention belongs to the technical field of physical energy storage, and in particular relates to a self-condensing compressed carbon dioxide energy storage system and method based on a vortex tube. Background technique [0002] Energy is the material basis of social development, but also a key factor restricting economic development. With the continuous development of economy and society, energy consumption continues to increase, and continuing to increase traditional power production capacity will bring severe environmental pollution problems. The development and utilization of renewable energy such as solar energy and wind energy provide a way to solve the current energy and environmental problems in our country. However, wind energy and solar energy have the characteristics of volatility and intermittency. The power fluctuation brought about by large-scale grid connection is the main difficulty for their large-scale and effective utilization, ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a self-condensing compressed carbon dioxide energy storage system and method based on vortex tubes to solve the problem that the liquefaction of expanded carbon dioxide in the current compressed carbon dioxide energy storage technology requires an additional cold source, and it is difficult to liquefy at room temperature Vortex tubes are generally used in refrigeration systems. Gas under pressure expands and accelerates through the vortex tubes, forms a free vortex, and then separates to obtain the cold air flow required for refrigeration.

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