A mine tunnel based wind energy storage power generation device and method

Abstract

The application belongs to the technical field of wind power generation, and proposes a wind energy storage power generation device and method based on a mine tunnel, which comprises a fan, a compressor connected with the fan, an elastic gas storage bag connected with the compressor, and a power generation mechanism connected with the elastic gas storage bag; the elastic gas storage bag is arranged in the mine tunnel; in the low valley stage of electricity consumption, the compressor compresses air into the elastic gas storage bag by means of the wind energy of the fan; in the peak stage of electricity consumption, the air in the elastic gas storage bag is released to provide power for the power generation mechanism to generate electricity; in the air release process, the water in the elastic gas storage bag is released by means of the pressure of the deep underground water in the mine tunnel; the elastic gas storage bag is arranged in the mine tunnel, and the stored air can be completely released by means of the pressure of the deep underground water in the mine tunnel, thereby improving the utilization rate of energy storage and reducing the power supply pressure of the power grid in the peak stage of electricity consumption.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, and particularly relates to a wind power energy storage and generation device and method based on a mine tunnel. Background Technology

[0002] Wind power is a type of green energy, but grid electricity demand has its off-peak and peak periods. During off-peak periods, the electricity generated by wind power cannot be fed into the grid, resulting in energy waste. Currently, wind power energy storage involves converting wind energy into electrical energy, which then drives a compressor to compress air for energy storage.

[0003] The inventors discovered that when electricity consumption is low, the method of storing energy by using an electric compressor to compress air has a problem: during the power generation process after energy storage, when the pressure of the stored air drops, the output pressure also drops, and the stored air cannot be completely released, affecting the utilization rate of energy storage and thus increasing the power supply pressure on the grid during peak electricity consumption. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a wind power storage and generation device and method based on a mine tunnel. An elastic air storage tank is placed inside the mine tunnel, and by utilizing the pressure of the groundwater at similar depths within the tunnel, all stored air can be released, improving the utilization rate of energy storage and reducing the power grid's supply pressure during peak electricity demand.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a wind power storage and generation device based on a mine tunnel, employing the following technical solution:

[0006] A wind power storage and power generation device based on a mine tunnel includes a wind turbine, a compressor connected to the wind turbine, a flexible gas storage tank connected to the compressor, and a power generation mechanism connected to the flexible gas storage tank.

[0007] The elastic air storage tank is installed inside the mine tunnel; during periods of low electricity demand, the compressor uses the wind power of the fan to compress and store air into the elastic air storage tank; during periods of peak electricity demand, the air in the elastic air storage tank is released to provide power for the power generation mechanism to generate electricity; during the air release process, the water in the elastic air storage tank is released using the pressure of the deep groundwater in the mine tunnel.

[0008] Furthermore, the elastic gas storage bag is a cylindrical rubber gas storage bag.

[0009] Furthermore, one end of the mine tunnel is connected to a water source.

[0010] Furthermore, the elastic gas storage bag is placed horizontally inside the mine tunnel.

[0011] Furthermore, a control valve is provided between the compressor and the elastic gas storage tank.

[0012] Furthermore, the fan includes an impeller, a main gear connected to the impeller, a first driven gear meshing with the main gear, and a fan generator connected to the first driven gear; the compressor is connected to a second driven gear 201, which meshes with the main gear.

[0013] Furthermore, a first clutch is provided between the first driven gear and the wind turbine generator; the compressor is connected to the second driven gear through a second clutch.

[0014] Furthermore, the power generation mechanism includes a heat collection device, an expander, a steam turbine, and a generator connected in sequence.

[0015] Furthermore, the expander is connected to the elastic gas storage tank via a pipeline.

[0016] To achieve the above objectives, in a second aspect, the present invention also provides a wind power storage and generation method based on a mine tunnel, employing the following technical solution:

[0017] A wind power storage and power generation method based on a mine tunnel employs a wind power storage and power generation device based on a mine tunnel as described in the first aspect, comprising: during periods of low electricity demand, the compressor compresses and stores air in the elastic air storage tank using the wind power of the wind turbine; during periods of peak electricity demand, the air in the elastic air storage tank is released to provide power to the power generation mechanism for power generation.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention includes a fan, a compressor connected to the fan, a flexible air storage tank connected to the compressor, and a power generation mechanism connected to the flexible air storage tank. The flexible air storage tank is installed inside a mine tunnel. During periods of low electricity demand, the compressor uses the wind power from the fan to compress and store air in the flexible air storage tank. During periods of peak electricity demand, the air in the flexible air storage tank is released to power the power generation mechanism for electricity generation. During the air release process, the water in the flexible air storage tank is released using the pressure of the groundwater at a similar depth within the mine tunnel. By arranging the flexible air storage tank inside the mine tunnel and utilizing the pressure of the groundwater at a similar depth within the mine tunnel, all the stored air can be released, improving the utilization rate of energy storage and reducing the power supply pressure on the grid during peak electricity demand. Attached Figure Description

[0020] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the fan in Embodiment 1 of the present invention;

[0023] Among them, 1. Fan; 101. Impeller; 102. Main gear; 103. First driven gear; 104. First clutch; 105. Fan generator; 2. Compressor; 201. Second driven gear; 202. Second clutch; 3. Refrigeration unit; 4. Control valve; 5. Flexible air storage tank; 6. Mine tunnel; 7. Soil layer; 8. Water source; 9. Heat collection device; 10. Expander; 11. Steam turbine; 12. Generator. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] Example 1:

[0027] Energy storage is achieved by using an electric compressor to compress air. However, during the power generation process after energy storage, the output pressure drops when the pressure of the stored air decreases, preventing the complete release of the stored air and affecting the utilization rate of energy storage. This, in turn, increases the power supply pressure on the grid during peak electricity demand.

[0028] In response to the above problems, such as Figure 1 As shown, this embodiment provides a wind power storage and power generation device based on a mine tunnel, including a wind turbine 1, a compressor 2 connected to the wind turbine 1, an elastic gas storage tank 5 connected to the compressor 2, and a power generation mechanism connected to the elastic gas storage tank 5.

[0029] The elastic air storage tank 5 is installed inside the mine tunnel 6. During periods of low electricity demand, the compressor 2 uses the wind power of the fan 1 to compress and store air in the elastic air storage tank 5. During periods of peak electricity demand, the air in the elastic air storage tank 5 is released to provide power for the power generation mechanism to generate electricity. During the air release process, the water in the elastic air storage tank 5 is released using the pressure of the deep groundwater in the mine tunnel 6.

[0030] Specifically, the elastic air storage bag 5 is arranged inside the mine tunnel 6. With the help of the pressure of the groundwater at the same depth inside the mine tunnel 6, the stored air can be completely released, which improves the utilization rate of energy storage and reduces the power supply pressure on the power grid during peak electricity demand.

[0031] Optionally, the power generation mechanism includes interconnected heat collection devices 9, expanders 10, steam turbines 11, and generators 12; a control valve is provided between the compressor and the elastic gas storage tank.

[0032] It should be noted that the connection in this invention is not only understood as a mechanical fixed connection, but also as a transmission connection realized through mechanical parts, a pipeline connection for transporting materials, and an electrical connection, etc. The specific connection method depends on the specific situation and will not be described in detail here.

[0033] Understandably, multiple fans 1 and compressors 2, refrigeration units 3, heat collection devices 9, expanders 10, steam turbines 11, and generators 12 are provided, and multiple compressors 2 and multiple expanders 10 can be connected to the same flexible gas storage tank through pipelines.

[0034] like Figure 2 As shown, optionally, the fan includes at least an impeller 101, a main gear 102 connected to the impeller 101, a first driven gear 103 meshing with the main gear 102, and a fan generator 105 connected to the first driven gear 103. A first clutch 104 is provided between the first driven gear 103 and the fan generator 105. The compressor 2 is connected to a second driven gear 201 via a second clutch 202, and the second driven gear 201 meshes with the main gear 102.

[0035] Specifically, during off-peak electricity demand, the first clutch 104 disengages the first driven gear 103 from the wind turbine generator 105, while the second clutch 202 connects the compressor 2 to the second driven gear 201. The impeller 101 drives the main gear 102 to rotate, which in turn drives the second driven gear 201, thereby powering the compressor 2. The compressor 2 compresses and stores air into the elastic air storage tank 5. During peak electricity demand, the first clutch 104 connects the first driven gear 103 to the wind turbine generator 105, while the second clutch 202 disengages the compressor 2 from the second driven gear 201. The impeller 101 drives the first driven gear 103 to rotate, thereby powering the wind turbine generator 105 to generate electricity.

[0036] It should be noted that, in addition to the first clutch 104, the second clutch 202, and the wind turbine generator 105, the wind turbine 1 and the compressor 2 also include other equipment and components; the selection and setting of other equipment and components, as well as all equipment, can be achieved through conventional technology, and will not be described in detail here.

[0037] Optionally, the mine tunnel 6 is an abandoned mine shaft located in the soil layer 7, and the mine tunnel 6 is connected to a water source 8, which can be understood as an existing water source such as a river or lake. The elastic air storage bag 5 can be set as a cylindrical rubber air storage bag, and the elastic air storage bag 5 is placed horizontally inside the mine tunnel 6; by using the cylindrical rubber air storage bag inside the mine tunnel 6, the capacity of multiple wind turbines 1 can be stored in one area at the same time, and when the compressed air is released, it drives multiple steam turbines 11 to generate electricity.

[0038] The expander 10 is connected to the elastic gas storage tank through a pipeline. During periods of low electricity demand, the expanded gas provided by the elastic gas storage tank 5 expands and depressurizes to provide mechanical work to the steam turbine 11, which in turn drives the generator 12 to generate electricity.

[0039] A refrigeration unit 3 is provided between the compressor 2 and the elastic gas storage tank 5. The gas compressed by the compressor 2 enters the elastic gas storage tank 5 after passing through the refrigeration unit 3. At the same time, a heat collection device 9 is provided between the expander 10 and the compressor 2 to realize the recycling of cold and heat energy and ensure efficiency.

[0040] Example 2:

[0041] This embodiment provides a wind power storage and power generation method based on a mine tunnel, which adopts the wind power storage and power generation device based on a mine tunnel as described in Embodiment 1, including: during the off-peak electricity demand period, the compressor uses the wind power of the wind turbine to compress and store air in the elastic air storage tank; during the peak electricity demand period, the air in the elastic air storage tank is released to provide power to the power generation mechanism for power generation.

[0042] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A wind power storage and power generation device based on a mine tunnel, characterized in that, It includes a fan, a compressor connected to the fan, a flexible gas storage tank connected to the compressor, and a power generation mechanism connected to the flexible gas storage tank; The elastic gas storage bag is installed inside the mine tunnel; During periods of low electricity demand, the compressor uses the wind power of the fan to compress and store air in the elastic air storage tank; during periods of peak electricity demand, the air in the elastic air storage tank is released to provide power for the power generation mechanism to generate electricity. During the air release process, the air inside the elastic air storage bag is released by utilizing the pressure of the deep groundwater inside the mine tunnel; the elastic air storage bag is a cylindrical rubber air storage bag; The mine tunnel is an abandoned mine tunnel set in the soil layer; one end of the mine tunnel is connected to a water source; the elastic air storage bag is placed horizontally inside the mine tunnel. The fan includes an impeller, a main gear connected to the impeller, a first driven gear meshing with the main gear, and a fan generator connected to the first driven gear; the compressor is connected to a second driven gear, which meshes with the main gear. A first clutch is provided between the first driven gear and the wind turbine generator; the compressor is connected to the second driven gear through a second clutch.

2. The wind power storage and power generation device based on a mine tunnel as described in claim 1, characterized in that, A control valve is provided between the compressor and the elastic gas storage tank.

3. The wind power storage and power generation device based on a mine tunnel as described in claim 1, characterized in that, The power generation mechanism includes a heat collection device, an expander, a steam turbine, and a generator connected in sequence.

4. A wind power storage and generation device based on a mine tunnel as described in claim 3, characterized in that, The expander and the elastic gas storage tank are connected by a pipeline.

5. A wind power storage and generation method based on mine tunnels, characterized in that, The wind power storage and power generation device based on a mine tunnel as described in any one of claims 1-4 includes: during the off-peak electricity consumption period, the compressor compresses and stores air in the elastic air storage tank using the wind power of the fan; during the peak electricity consumption period, the air in the elastic air storage tank is released to provide power to the power generation mechanism for power generation.

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