Offshore non-adiabatic isobaric double-container compressed air energy storage system and method

Abstract

The invention provides an offshore non-adiabatic isobaric double-container compressed air energy storage system and method. A motor for driving a compressor unit to do work is connected to a power input end of the compressor unit. A generator is connected to a power output end of an expander unit. A valve of a gas inlet of a low-pressure gas bag is connected with a gas outlet of the expander unit,and a valve of a gas outlet of the low-pressure gas bag is connected with a gas inlet of the compressor unit. A valve of a gas inlet of a high-pressure gas bag is connected with a gas outlet of the compressor unit, and a valve of a gas outlet of the high-pressure gas bag is connected with a gas inlet of the expander unit. The low-pressure gas bag and the high-pressure gas bag are both arranged below the sea surface with the depths unchanged. When energy is stored, the motor drives the compressor unit to do work, and gases in the low-pressure gas bag enter the high-pressure gas bag; and when the energy is released, the high-pressure gases in the high-pressure gas bag do work on the expander unit and drive the generator to generate electricity, and the gases that complete the work enter thelow-pressure gas bag. The compression process is significantly shortened and the energy utilization efficiency of the energy storage system is improved.

Description

Technical field [0001] The invention relates to the technical field of physical energy storage, in particular to an offshore non-adiabatic isostatic double-container compressed air energy storage system and method. Background technique [0002] With the improvement of the country's environmental standards and the people's demand for quality of life, the high pollution and high emissions caused by the long-term consumption of fossil fuels have received more and more attention, and the adjustment and optimization of energy structure has risen to the national strategic level. Therefore, the development of renewable energy continues to increase, and the proportion of clean energy such as wind power and solar energy in the primary energy continues to increase. Due to the volatility of the natural temporal and spatial distribution of renewable energy such as wind and solar energy, the increase in the proportion of renewable energy in the energy structure puts forward higher requirement...

AI Technical Summary

Problems solved by technology

With the development of wind energy resources gradually shifting to offshore, traditional compressed air energy storage technology is difficult to continue to apply to offshore conditions

At the same time, the compressors of the existing compressed air energy storage system all take in air from the air, and the air intake pressure is the ambient pressure

The compression process requires multi-stage compression and multi-stage cooling to meet energy storage requirements, and this process will cause a large amount of irreversible loss of electrical energy

Both the energy storage process and the energy release process of the traditional compressed air energy storage system operate under variable working conditions, which leads to a significant reduction in the energy storage and energy release conversion efficiency of the system

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