Underwater isobaric compressed air hybrid energy storage system and method

A hybrid energy storage system and compressed air technology, applied in the field of underwater energy storage, can solve problems such as the complex structure of underwater energy storage systems, and achieve the effects of developing offshore energy, reducing environmental pollution, and improving system reliability and stability

Pending Publication Date: 2021-10-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the complex structure problem of the underwater energy storage system capable of stabilizing power supply in the prior art. The present invention provides an underwater isobaric compressed air hybrid energy storage system and method

Method used

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  • Underwater isobaric compressed air hybrid energy storage system and method

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specific Embodiment approach 1

[0041] Specific implementation mode one: the following combination figure 1 Describe this embodiment. The underwater isobaric compressed air hybrid energy storage system described in this embodiment includes a motor / generator 1, a compressor 2, an expander 3, an air storage tank group 4, No. 1 clutch 5 and No. 2 Clutch 6;

[0042] The power supply of the motor / generator 1 is marine renewable energy;

[0043] The gas storage tank group 4 includes N gas storage tanks 4-1, and the N gas storage tanks 4-1 are sequentially connected from left to right; N is an integer greater than or equal to 2;

[0044]The gas storage tank group 4 is placed in the sea, and the rightmost gas storage tank 4-1 in the gas storage tank group 4 is connected to the sea water, and the leftmost gas storage tank 4-1 in the gas storage tank group 4 is connected to the compressor 2 Connected with expander 3;

[0045] One end of the main shaft of the motor / generator 1 is connected to the input shaft of the ...

specific Embodiment approach 2

[0051] Specific implementation mode two: the following combination figure 1 Describe this embodiment. This embodiment is a further description of the underwater isobaric compressed air hybrid energy storage system described in the first specific embodiment. The underwater isobaric compressed air hybrid energy storage system also includes a heat accumulator 7;

[0052] The first gas input port of the heat accumulator 7 communicates with the gas output port of the compressor 2, and the first gas output port of the heat accumulator 7 communicates with the gas input port of the expander 3,

[0053] The first gas input / output port of the heat accumulator 7 communicates with the leftmost gas storage tank 4-1 in the gas storage tank group 4;

[0054] A valve 8 is provided on the pipeline between the heat accumulator 7 and the leftmost gas storage tank 4-1 in the gas storage tank group 4;

[0055] The heat accumulator 7 is used to heat the gas.

[0056] In this embodiment, the comp...

specific Embodiment approach 3

[0057] Specific implementation mode three: the following combination figure 1 Describe this embodiment. This embodiment is to further explain the underwater isobaric compressed air hybrid energy storage system described in the second specific embodiment. The underwater isobaric compressed air hybrid energy storage system also includes water turbine power generation Machine 9;

[0058] The water turbine generator 9 is arranged at the bottom of the rightmost gas storage tank 4-1 in the gas storage tank group 4,

[0059] By entering / exiting the seawater in the rightmost gas storage tank 4-1 of the gas storage tank group 4, the water turbine generator 9 does work, so that the water turbine generator 9 generates electricity, and the electric energy is used to supply power to the heat accumulator 7.

[0060] In this embodiment, the change of gas in the gas storage tank group 4 will bring about the rapid flow of seawater in the gas storage tank group 4, where a hydroelectric generat...

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Abstract

The invention discloses an underwater isobaric compressed air hybrid energy storage system and method, and belongs to the technical field of underwater energy storage. The problem that in the prior art, an underwater energy storage system capable of conducting voltage-stabilized power supply is complex in structure is solved. A gas storage tank set comprises N gas storage tanks, and the N gas storage tanks are sequentially communicated end to end from left to right; the gas storage tank set is arranged in the sea, the gas storage tank on the rightmost side of the gas storage tank set communicates with seawater, and the gas storage tank on the leftmost side of the gas storage tank set communicates with a compressor and an expansion machine; when a motor/generator serves as an electric motor, the motor/generator drives an input shaft of the compressor to rotate, so that the compressor compresses air into the gas storage tank set, and the air is stored through the gas storage tank set; and when the motor/generator serves as a generator, gas output by the gas storage tank set acts on the expansion machine, so that an output shaft of the expansion machine drives a main shaft of the motor/generator to rotate, and electric energy output by the motor/generator is transmitted to a power grid. The underwater isobaric compressed air hybrid energy storage system is mainly used for storing offshore energy.

Description

technical field [0001] The invention belongs to the technical field of underwater energy storage. Background technique [0002] Energy storage technology can store and release energy, make up for the shortcoming of the instantaneous energy of the power generation system, and can also greatly improve the volatility of renewable energy. It has become a key component of smart grids, renewable energy systems, and energy Internet. One of the major supporting technologies. Currently applied energy storage technologies mainly include pumped storage power stations, compressed air energy storage, flow batteries, storage batteries, superconducting magnetic energy, flywheels, and capacitors / supercapacitors. Due to the limitations of energy density, capacity, efficiency, energy storage period, operating cost, and lifespan, only two systems, pumped hydro storage and compressed air energy storage, operate in large-scale commercial systems. [0003] At present, the development of marine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B41/02F01D15/10F03B13/00
CPCF04B41/02F01D15/10F03B13/00Y02E60/16Y02E70/30
Inventor 张鲁寇宝泉黄昌闯葛庆稳韦坚
Owner HARBIN INST OF TECH
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