Compressed air stored energy power generating system based on liquid pistons

Abstract

The invention discloses a compressed air stored energy power generating system based on liquid pistons. The system comprises the first liquid piston, the second liquid piston, a low-pressure gas pipeline, a high-pressure gas pipeline, a high-pressure gas storage tank, a power generator, a first water pump, a second water pump, a water source, a heating device, a cooling device and a control device. The two liquid piston devices, the low-pressure gas pipeline, the high-pressure gas pipeline and the power generator are arranged, air is compressed and expanded in the liquid pistons, potential energy of compressed air is fully utilized, the loss is lowered, and the stored energy utilization rate is high; temperature sensors and liquid storage plates are arranged in the liquid pistons, the cooling device is arranged outside the liquid pistons, the temperature in the liquid pistons can be adjusted in the air compression and expansion processes, equipment damage caused by dramatic temperature changes is prevented, and the safety is high; the heating device and the cooling device are arranged for controlling the temperature of the liquid, so that the temperature of gas is controlled, and the automation degree is high; and the temperature adjusting capacity is good, and the stored energy utilization rate is further increased.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of electric energy storage, and specifically relates to a compressed air energy storage power generation system based on a liquid piston. [0003] Background technique: [0004] In today's world, the imbalance of power load is becoming increasingly prominent, and the peak-to-valley difference of the power grid is gradually increasing. At the same time, people’s requirements for the quality of power supply of the power grid are getting higher and higher. Therefore, there is an urgent need for economical, stable, reliable and efficient power storage systems and It is matched to alleviate the excessive peak-valley difference of system load. Electric energy storage system is also a key technology to solve the problems of distributed energy systems such as small capacity and large load fluctuations. [0005] At present, there are many ways of power storage: compressed air energy storage, pumped water storage, ele...

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is that in the process of air compression and expansion of the compressed air energy storage device in the prior art, the temperature changes drastically, the potential energy of the compressed air is not fully utilized, and the energy storage utilization efficiency is low. Compressed air energy storage power generation system based on liquid piston

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