Wind-driven compressed air energy storage system

Abstract

The invention provides a wind-driven compressed air energy storage system which can reduce wind energy collection lower limit and enlarge wind energy collection range. The wind-driven compressed air energy storage system comprises a fan, a stepless transmission, a flywheel, a clutch, a reciprocating type air compressor as well as a pressure gas storage device, wherein the fan drives the flywheel through the stepless transmission; the flywheel realizes the on-off with the air compressor through the clutch, and the fan transmits the collected wind energy to the flywheel to be stored through the stepless transmission; the combination and separation between the flywheel and the air compressor drive the air compressor and the flywheel to realize energy storage again; and at the initial energy storage stage, the stepless transmission is used for realizing speed reduction and pitch increment, then the stepless transmission realizes speed increment. According to the system provided by the invention, the fan is used for collecting wind energy, then the stepless transmission is used for transmitting kinetic energy to the flywheel to be stored, the rotating speed of the flywheel is increased to reach a set value, the flywheel drives the air compressor, the air compressor compresses air, and then the compressed air is stored in a pressure air storage device; along with the consumption of the mechanical energy, the flywheel and the air compressor are separated from each other, and the system enters the next energy storage circulation.

Description

technical field [0001] The invention relates to a compressed air energy storage system, in particular to a compressed air energy storage system using wind energy as a driving force. Background technique [0002] At present, a wind energy collection and storage system composed of a horizontal axis fan, a reciprocating air compressor and a gas storage cylinder has been proposed. The horizontal axis fan directly drives the air compressor, converting the wind energy into rotation energy to drive the air compressor to compress the air and store it in the gas cylinder. However, the working condition of the above system is that the pressure at the air outlet of the air compressor is greater than the air pressure in the gas storage cylinder. In order to ensure the operation of the air compressor, the ambient wind speed is required to be greater than the minimum working wind speed, which limits the use of low wind speed. Contents of the invention [0003] The technical problem...

AI Technical Summary

Problems solved by technology

However, the working condition of the above-mentioned system is that the pressure at the air outlet of the air compressor is greater than the air pressure in the gas storage cylinder. In order to ensure the operation of the air compressor, the ambient wind speed is required to be greater than the minimum working wind speed, which limits the use of low wind speed.

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