Compressed air constant pressure energy storage power generation system using working medium phase change

Abstract

The invention belongs to the field of new energy utilization, and relates to a compressed air constant pressure energy storage power generation system using working medium phase change. The system generates high-pressure compressed air through the multistage compression of an air compressor. The high-pressure compressed air generates power through a multistage turbo expander. With the help of a special compressed air storage tank, the compressed air can be released at a constant pressure. The specific implementation mode of the system is as follows: the system utilizes the physical characteristic of the enormous volume change of the vapor-liquid phase change of a working medium (carbon dioxide or other) and the special high-pressure air storage tank with an isolation airbag or a piston inside, when the pressure in the high-pressure air storage tank is reduced to a specific design pressure, the compressed air can be continuously discharged at a constant pressure under the pressure generated by the working medium gas (carbon dioxide or other) until the stored compressed air is exhausted.

Description

technical field [0001] The invention belongs to the field of new energy utilization, and relates to a compressed air constant-pressure energy storage power generation system using working medium in disguise. The system can greatly improve the efficiency of compressed air energy storage power generation by using a new energy storage method. Background technique [0002] As human beings are concerned about global warming and the scarcity of fossil fuels, the development and utilization of renewable energy is developing rapidly around the world. The large-scale development and utilization of renewable energy (wind energy, solar energy, ocean energy, etc.) is becoming more and more popular, but renewable energy has defects such as intermittency and uncertainty. The volatility of renewable energy will have a greater impact on the power grid and affect the security of the power grid. Therefore, the utilization rate of renewable energy is very low, and there is a large amount of ab...

AI Technical Summary

Problems solved by technology

However, there are many difficult technical problems in establishing a compressed air energy storage system in deep water at present, and there are also problems of high cost and limitation of geographical environment

The conversion efficiency of the existing multi-stage regenerative compressed air energy storage system without supplementary combustion is still low due to the heat loss in the regenerative process

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