Co-generation compressed air energy storage method and energy storage system

Abstract

The invention discloses a co-generation compressed air energy storage method and an energy storage system. The energy storage method comprises the following steps that: exhausted gas of a turbo expander and high-pressure gas subjected to pressure adjustment enter an afterheat exchanger, then are heated through a heat accumulator and a combustion chamber in sequence, and return to the turbo expander; the high-pressure gas of a gas storage device and the exhausted gas of the turbo expander enter a sprayer through different gas suction ports, wherein the gas pressure of the high-pressure gas subjected to acceleration and pressure reduction of the gas storage device is lower than that of the exhausted gas; heat produced by the working of a gas compressor passes through a cooling heat exchanger, and water is heated by the heat of the cooling heat exchanger to produce hot water. According to the co-generation compressed air energy storage method and the energy storage system, regenerative energy can be fully used, and the consumption of non-regenerative energy is reduced; by pressure adjustment of the sprayer, the energy loss in a process of adjusting the pressure of the compressed gas is reduced; the afterheat can be effectively used, and co-generation is realized.

Description

technical field [0001] The invention relates to the technical field of electric energy storage, in particular to a compressed air energy storage method and an energy storage system for cogeneration of heat and power. Background technique [0002] my country has abundant reserves of wind energy and solar energy resources. By the end of 2011, the total installed capacity of wind power generation had reached 62.93GW, ranking first in the world. Wind energy and solar energy are renewable energy resources. There are obvious fluctuations in the magnitude of the wind and the intensity of sunlight during the day and night during the day, so the corresponding wind power and solar power generation is intermittent and unstable. Combined with the country's overall strategy of vigorously developing wind power and solar power generation, and considering the intermittency and instability of wind power and solar power, research and develop energy storage technologies with large-scale storag...

AI Technical Summary

Problems solved by technology

Although the current compressed air energy storage technology has obtained reliable commercial operation experience, it needs to consume too much natural gas in the energy release stage, and the electricity from renewable power resources has not been fully utilized.

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