Water pumping and air compressing integrated energy storage system utilizing abandoned mine underground roadway

An energy storage system and underground roadway technology, which is applied in the fields of pumped water storage, compressed air energy storage, and reuse of abandoned mines, can solve problems such as low energy storage efficiency, and achieve the effect of increasing operating profits and improving operating efficiency

Inactive Publication Date: 2021-10-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an integrated energy storage system for pumping, compressing and gas using underground tunnels of abandoned mines to solve the problem of low energy storage efficiency

Method used

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  • Water pumping and air compressing integrated energy storage system utilizing abandoned mine underground roadway

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 A pumped, compressed, and gas-integrated energy storage system using the underground tunnel of an abandoned mine is shown, including a surface central power supply unit, a compressed air energy storage unit, a pumped energy storage unit, and a first turbine generator 12 and a second turbine generator 13 ;in,

[0038]The compressed air energy storage unit includes an air compressor 6, an underground water-air mixing chamber 2, a high-pressure air pump 7, an underground high-pressure air storage chamber 1, a tee joint, a first valve 8, a second valve 9 and a third valve 10; the air compressor The outlet end of 6 communicates with the inlet end of the high-pressure air pump 7 and the top of the underground water-gas mixing chamber 2 respectively through a three-way joint, and a third valve 10 is arranged between the three-way joint and the outlet end of the air compressor 6. A second valve 9 is provided between the inlets of the high-pressure air pump 7, ...

Embodiment 2

[0051] In this embodiment, the integrated energy storage system for pumping, pressing and gas in Embodiment 1 is used to perform day and night cycle work, and the working process is as follows:

[0052] 1. When the electricity price is high during the day, open the sixth valve 16 to make the water in the surface reservoir 4 (reservoir) drive the second turbine generator 13 to generate electricity through the kinetic energy generated by its own gravity, and the water flowing through the second turbine generator 13 Slowly flow into the underground water-gas mixing chamber 2, and start to pressurize the existing gas in the chamber;

[0053] 2. When the electricity price is low at night, the integrated power station 5 drives the air compressor 6 to do work on the air by absorbing the valley electric energy, and the generated high-pressure gas enters the high-pressure air pump 7 through the third valve 10 and the existing high-pressure gas in the underground water-air mixing chamber...

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Abstract

The invention relates to a water pumping and air compressing integrated energy storage system utilizing an abandoned mine underground roadway. The water pumping and air compressing integrated energy storage system comprises an earth surface center power supply unit, a compressed air energy storage unit, a water pumping energy storage unit, a first turbine generator and a second turbine generator, wherein an air compressor and a high-pressure air pump in the compressed air energy storage unit are driven by the earth surface center power supply unit to store high-pressure air in a high-pressure air storage roadway, so that renewable energy absorbed by the earth surface center power supply unit is converted into compressed air stored energy; a water pumping electric motor in the water pumping energy storage unit is driven by the earth surface center power supply unit to extract water in an underground water storage reservoir to an earth surface reservoir, so that the renewable energy absorbed by the earth surface center power supply unit is converted into gravitational potential energy; and finally, the compressed air stored energy and the gravitational potential energy are converted into electric energy so as to be output through the turbine generators. Compared with the prior art, the water pumping and air compressing integrated energy storage system utilizing the abandoned mine underground roadway provided by the invention has high economical efficiency and energy storage efficiency, and a new way is provided for recycling of an abandoned mine.

Description

technical field [0001] The invention belongs to the technical fields of reuse of abandoned mines, compressed air energy storage, and pumped water storage, and relates to an integrated energy storage system for pumping, compressing and air-pumping using underground tunnels of abandoned mines. Background technique [0002] The rapid development of intermittent renewable energy represented by wind energy and solar energy also brings certain hidden dangers to the safe operation of the power grid. The development of energy storage technology is an effective way to improve the efficiency of renewable energy generation. At present, only pumped hydro storage and compressed air energy storage can realize large-scale energy storage and power generation. Both pumped water storage and compressed air energy storage require large-scale water storage or gas storage space, and the existing underground tunnels of abandoned mines can be rebuilt to meet this requirement, so that energy storage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B13/00F03B13/06F04B41/02F04B35/04F04F1/00
CPCF03B13/00F03B13/06F04B41/02F04B35/04F04F1/00F05B2220/706Y02E60/16Y02E10/20
Inventor 徐英俊夏才初王辰霖
Owner TONGJI UNIV
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