Air storage device for gravity compressed air energy storage and method thereof

Abstract

The invention relates to the field of compressed air energy storage power generation, in particular to an air storage device for gravity compressed air energy storage and a method thereof. The device comprises a vertical shaft, a gravity pressing block, an air storage bag, an air inlet sealing valve and an exhaust sealing valve, wherein the gravity pressing block and the air storage bag are sequentially arranged in the vertical shaft from top to bottom, and the air inlet sealing valve and the exhaust sealing valve are arranged in the bottom of the vertical shaft; the air storage bag wraps the exteriors of the air inlet sealing valve and the exhaust sealing valve, and the gravity pressing block is arranged outside the top of the air storage bag; the air inlet sealing valve is connected with an air inlet pipeline extending out of the vertical shaft; an input end, extending out of the vertical shaft, of the air inlet pipeline is sequentially provided with a motor, an air compressor and a first heat exchanger, and the exhaust sealing valve is connected with an exhaust pipeline extending out of the vertical shaft; the second heat exchanger, an air expander and a generator are sequentially arranged at an output end, extending out of the vertical shaft, of the exhaust pipeline; and heat release side of the first heat exchanger communicates with the heat absorption side of the second heat exchanger through a heat accumulator. The problems that compressed air depends on the geographic position, the energy storage density is low, and constant external work cannot be achieved can be effectively solved.

Description

technical field [0001] The invention relates to the field of compressed air energy storage power generation, in particular to a gas storage device and method for gravity compressed air energy storage. Background technique [0002] Renewable energy power generation technologies such as wind energy and solar energy have problems of intermittency and volatility. With the increase in the proportion of wind energy and solar energy installed capacity and the increase in the difference between peak and valley of traditional power, some areas have "abandoned wind" and "abandoned light" . An effective way to solve this problem is to use electric energy storage systems. There are many types of energy storage technologies, but so far, they have a high degree of matching with the power grid. The energy storage technologies that can achieve large-scale energy storage are mainly pumped storage power station technology and Compressed air energy storage power station. [0003] The pumped ...

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Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention provides a gas storage device and method for gravity compressed air energy storage, which effectively solves the problem that compressed air depends on geographic location, has low energy storage density, and cannot perform constant external work

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