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
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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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