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High-pressure liquid air energy storage/release system

A technology of liquid air and high-pressure air, applied in the direction of machines/engines, mechanical equipment, mechanisms that generate mechanical power, etc., can solve problems such as high energy, consumption, and reduced operating efficiency of energy storage systems, and achieve high energy density and high efficiency Effect

Active Publication Date: 2012-10-31
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is necessary to consume relatively high energy in the depressurization and throttling link of the energy storage process and the boosting link of the cryopump in the energy release process, thereby reducing the operating efficiency of the energy storage system.

Method used

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  • High-pressure liquid air energy storage/release system
  • High-pressure liquid air energy storage/release system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 Shown is Embodiment 1 of the high-pressure liquid air energy storage / energy release system of the present invention. Among them, compressor unit 1, cold accumulator 2, low-temperature heat exchanger 3, high-pressure liquid air storage tank 4, self-supercharger 5, low-temperature expander 6, heat storage / heat exchanger 7, main expansion unit 8, generator 24 , drive motor 9, valves 14, 19, 21, pipelines 10, 11, 12, 13, 15, 16, 17, 18, 20, 22, 23, 25, 26, inlet air A.

[0042] The drive motor 9 is fixedly connected to the common transmission shaft of the compressor unit 1 , and the generator 24 is fixedly connected to the common transmission shaft of the expander 8 . The inlet of the compressor unit 1 is connected to the air A, and communicates with the regenerator 2 through the pipeline 10 . The cold accumulator 2, the low-temperature heat exchanger 3, and the high-pressure low-temperature liquid storage tank 4 are sequentially connected through pipelin...

Embodiment 2

[0047] figure 2 It is Embodiment 2 of the high-pressure liquid air energy storage / energy release system that stores and releases compression heat of the present invention. Its main structure is the same as that of Embodiment 1. The high-pressure air generated by compressor unit 1 is cooled by heat storage / heat exchanger 7' After entering the cold accumulator 2, the heat accumulator / heat exchanger 7' mainly stores and releases the compression heat of the compressed air.

[0048] When storing energy, the high-pressure air at the outlet of the compressor unit 1 first enters the heat storage / heat exchanger 7', and the heat generated by the compressed air is absorbed by the heat storage material, while the temperature of the high-pressure air drops to normal temperature. The normal-temperature high-pressure air exiting the heat storage / heat exchanger 7 ′ enters the cold storage 2 sequentially, and the low-temperature heat exchanger 3 is liquefied and stored in the high-pressure li...

Embodiment 3

[0050] image 3 It is the embodiment 3 of the combination of the high-pressure liquid air energy storage system of the present invention and solar thermal power generation or industrial waste heat utilization. Its main structure is the same as that of embodiment 2, and the connection with solar collectors or industrial waste heat / waste heat pipelines is added. part. The high-temperature fluid from the solar collector or industrial waste heat / waste heat enters the high-temperature heat storage / heat exchanger 7" through the pipeline 26, and the high-temperature fluid releases heat and cools down in the high-temperature heat storage / heat exchanger 7". The main high-pressure air coming out of the heat storage / heat exchanger 7' is heated to a high temperature in the high-temperature heat storage / heat exchanger 7", and then enters the main expansion unit 8 through the pipeline 23 to expand and perform work.

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Abstract

The invention discloses a high-pressure liquid air energy storage / release system, which comprises an energy storage subsystem and an energy release subsystem; in the energy storage subsystem, a compressor set (1), a cold accumulator (2), a low-temperature heat exchanger (3), a high-pressure low-temperature storage tank (4), a low-temperature expansion machine set (6) and a low-temperature heat exchanger (3) are communicated in sequence; the energy release subsystem comprises a self-pressurization unit (5) and an acting unit; and the high-pressure and low-temperature storage tank (4), the cold accumulator (2), a heat accumulator / heat exchanger (7) and a main expansion machine set (8) are connected in sequence, and the main expansion machine set (8) drives a power generator (24). The high-pressure liquid air energy storage system disclosed by the invention has the advantages of high energy density, high efficiency, no power consumption in the power generation stage, suitability for various power stations, no greenhouse gas generation, capability of recovering intermediate-temperature and low-temperature waste heat and the like.

Description

technical field [0001] The invention relates to the technical field of energy storage, and is an energy storage / release system based on high-pressure liquid air to store energy and utilize the stored energy to generate electric energy. Background technique [0002] With the increasing popularity of renewable energy (wind energy, solar energy, etc.), and the urgent need for grid peak regulation, improving grid reliability, and improving power quality, the importance of power energy storage systems has become increasingly prominent. Large-scale power energy storage technology can effectively solve the contradiction between peak and valley differences in power production and use; it can provide the reliability of power system power supply; it can solve the key technology of intermittent energy generation instability such as wind power, solar energy, and tidal energy. [0003] At the same time, the electric energy storage system is also a key technology of the distributed energy...

Claims

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Application Information

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IPC IPC(8): F03G7/00
Inventor 王亮陈海生刘金超盛勇张新敬谭春青
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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