An experimental apparatus for simulating the spatiotemporal variation of thermodynamic parameters of high-pressure air in an artificial tunnel.

Abstract

This invention provides an experimental apparatus and method for simulating the spatiotemporal variation of thermodynamic parameters of high-pressure air in an artificial chamber. It can measure the spatiotemporal variation of fluid thermodynamic parameters during the injection, storage, and release of high-pressure air in an artificial chamber, revealing the influence of characteristics such as inflation / discharge rate, minimum operating pressure, and air inlet temperature on temperature and pressure changes in the artificial chamber. This invention fills a gap in the existing technology and is suitable for large-scale industrial use and promotion.

Description

Technical Field

[0001] This utility model belongs to the field of compressed air energy storage, and specifically relates to an experimental device for simulating the spatiotemporal changes of high-pressure air thermodynamic parameters in an artificial tunnel. Background Technology

[0002] Compressed air energy storage is a new type of physical energy storage technology. It refers to using electrical energy to compress air during periods of low grid load and sealing the high-pressure air in a gas storage facility (salt cavern, artificial chamber, or ground-based gas storage device). The compressed air is then released during periods of high grid load to drive a steam turbine to generate electricity.

[0003] The existing technology lacks experimental equipment for this technology. How to provide an experimental device to simulate the spatiotemporal changes of thermodynamic parameters during the injection, storage and release of high-pressure air in an artificial chamber, to explore the real situation of fluid in the chamber under three working conditions, and to improve the theoretical basis for the engineering design of compressed air energy storage in artificial chambers has become a rarely mentioned technical problem in this new energy storage technology. Utility Model Content

[0004] The purpose of this invention is to provide an experimental device for simulating the spatiotemporal changes of thermal parameters of high-pressure air in an artificial chamber, in order to solve the problem that there is no experimental device in the prior art for simulating the spatiotemporal changes of thermal parameters during the injection, storage and release of high-pressure air in an artificial chamber.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An experimental device for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial chamber includes an inflation assembly, a pressure relief assembly, an venting device, and an artificial chamber.

[0007] The inflation assembly includes a first air compressor, the first output end of which is connected to a venting device, and the second output end of which is connected to the first end of a first check valve.

[0008] The second end of the first check valve is connected to the input end of the first heat exchanger, and the output end of the first heat exchanger is connected to the input end of the second air compressor; the third end of the first check valve is connected to one end of the anti-surge valve; the other end of the anti-surge valve is connected to both the output end of the second air compressor and the input end of the second heat exchanger.

[0009] The first output end of the second heat exchanger is connected to the venting device, and the second output end of the second heat exchanger is connected to the input end of the artificial chamber.

[0010] The output end of the artificial chamber is connected to the venting device through a pressure relief assembly;

[0011] The artificial chamber is equipped with a drain valve.

[0012] This utility model also has the following features:

[0013] Furthermore, it also includes an air filter, which is connected to the input of the first air compressor.

[0014] Furthermore, the pressure relief assembly includes a quick-opening valve and a venting regulating valve sequentially disposed between the artificial chamber and the venting device.

[0015] Furthermore, the first output end of the first air compressor is connected to the venting device via a first venting valve;

[0016] The first output end of the second heat exchanger is connected to the venting device through the second venting valve.

[0017] Furthermore, it also includes data acquisition components;

[0018] The data acquisition component includes a first temperature measuring element, a first flow measuring element, a first pressure measuring element, a second temperature measuring element, a second pressure measuring element, a second flow measuring element, a liquid level measuring element, a third temperature measuring element, and a third pressure measuring element;

[0019] The first temperature measuring element, the first flow measuring element, and the first pressure measuring element are located at the input end of the artificial chamber;

[0020] The second temperature measuring element and the second pressure measuring element are installed on the artificial chamber, and the liquid level measuring element is installed inside the artificial chamber;

[0021] The second flow measurement element, the third temperature measurement element, and the third pressure measurement element are located between the artificial chamber and the venting device.

[0022] Furthermore, an air injection valve is installed at the input end of the artificial chamber.

[0023] Furthermore, the artificial chamber is provided with a heat insulation layer.

[0024] Furthermore, it also includes a controller;

[0025] The controller is connected to the first temperature measuring element, the first flow measuring element, the first pressure measuring element, the second temperature measuring element, the second pressure measuring element, the second flow measuring element, the liquid level measuring element, the third temperature measuring element, and the third pressure measuring element, respectively.

[0026] Furthermore, a second check valve is provided at the inlet end of the second heat exchanger.

[0027] Compared with the prior art, this utility model has the following technical effects:

[0028] This invention provides an experimental apparatus and method for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial chamber. It can measure the spatiotemporal variation of fluid thermodynamic parameters during the injection, storage, and release of high-pressure air in an artificial chamber, revealing the influence of characteristics such as inflation / discharge rate, minimum operating pressure, and air inlet temperature on temperature and pressure changes in the artificial chamber. This invention fills a gap in existing technology and is suitable for large-scale industrial use and promotion. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an experimental device that simulates the spatiotemporal changes of high-pressure air thermal parameters in an artificial tunnel.

[0030] The meanings of the labels in the diagram are as follows:

[0031] 1. Venting device; 2. Artificial chamber; 3. First air compressor; 4. First check valve; 5. First heat exchanger; 6. Second air compressor; 7. Anti-surge valve; 8. Second heat exchanger; 9. Drain valve; 10. Air filter; 11. Quick-opening vent valve; 12. Venting regulating valve; 13. First vent valve; 14. Second vent valve; 15. First flow measuring element; 16. First pressure measuring element; 17. Second temperature measuring element; 18. Second pressure measuring element; 19. Second flow measuring element; 20. Liquid level measuring element; 21. Third temperature measuring element; 22. Third pressure measuring element; 23. Injection valve; 24. Controller; 25. Second check valve; 26. First temperature measuring element. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the artificial chamber uses a commonly known artificial chamber.

[0033] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0034] like Figure 1 As shown, an experimental device for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial chamber includes an inflation assembly, a pressure relief assembly, an venting device 1, and an artificial chamber 2.

[0035] The inflation assembly includes a first air compressor 3, the first output end of the first air compressor 3 is connected to the venting device 1, and the second output end of the first air compressor 3 is connected to the first end of the first check valve 4.

[0036] The second end of the first check valve 4 is connected to the input end of the first heat exchanger 5, and the output end of the first heat exchanger 5 is connected to the input end of the second air compressor 6; the third end of the first check valve 4 is connected to one end of the anti-surge valve 7; the other end of the anti-surge valve 7 is connected to both the output end of the second air compressor 6 and the input end of the second heat exchanger 8.

[0037] The first output end of the second heat exchanger 8 is connected to the venting device 1, and the second output end of the second heat exchanger 8 is connected to the input end of the artificial chamber 2.

[0038] The output end of the artificial chamber 2 is connected to the venting device 1 through a pressure relief assembly;

[0039] The artificial chamber 2 is equipped with a drain valve 9.

[0040] As a preferred embodiment, it also includes an air filter 10, which is connected to the input of the first air compressor 3.

[0041] During the inflation process in the artificial chamber 2, air passes through the air filter 10 and enters the first air compressor 3. The high-temperature air from the outlet of the first air compressor 3 enters the first heat exchanger 5 for heat exchange and steam-water separation. The air fluid from the outlet of the first heat exchanger 5 enters the second air compressor 5. The compressed air from the outlet of the second air compressor 5 enters the second heat exchanger 8 for heat exchange and steam-water separation. After two stages of compression and two stages of cooling, the high-pressure room-temperature air is stored in the artificial chamber 2. As the compression process continues, the pressure in the air storage tank gradually increases, and the exhaust pressure at the end of the compressor also continuously increases. Therefore, the compressor adopts a variable operating condition mode.

[0042] The anti-surge branch at the outlet of the second air compressor 6 is connected to the inlet and outlet pipes of the second air compressor 6 via an anti-surge valve 7, and is located before the first heat exchanger 5. The inlet of the anti-surge valve 7 is connected to the outlet pipe of the second air compressor 6, and the outlet of the anti-surge valve 7 is connected to the inlet pipe of the second air compressor 6. Both the first air compressor 3 and the second air compressor 5 operate under the anti-surge curve to prevent the compressor unit from entering the surge condition. When the first air compressor 3 and the second air compressor 5 start, the anti-surge valve 7 is fully open (100%), and the first check valve 4 on the exhaust pipe must be closed (100%).

[0043] As a preferred embodiment, the venting and pressure-reducing assembly includes a venting quick-opening valve 11 and a venting regulating valve 12, which are sequentially disposed between the artificial chamber 2 and the venting device 1.

[0044] As a preferred embodiment, the first output end of the first air compressor 3 is connected to the venting device 1 via the first venting valve 13;

[0045] The first output end of the second heat exchanger 8 is connected to the venting device 1 through the second venting valve 14.

[0046] As a preferred option, it also includes a data acquisition component;

[0047] The data acquisition component includes a first temperature measuring element 26, a first flow measuring element 15, a first pressure measuring element 16, a second temperature measuring element 17, a second pressure measuring element 18, a second flow measuring element 19, a liquid level measuring element 20, a third temperature measuring element 21, and a third pressure measuring element 22;

[0048] The first temperature measuring element 26, the first flow measuring element 15, and the first pressure measuring element 16 are disposed at the input end of the artificial chamber 2;

[0049] The second temperature measuring element 17 and the second pressure measuring element 18 are disposed on the artificial chamber 2, and the liquid level measuring element 20 is disposed inside the artificial chamber 2;

[0050] The second flow measurement element 19, the third temperature measurement element 21, and the third pressure measurement element 22 are disposed between the artificial chamber 2 and the venting device 1.

[0051] It also includes controller 24;

[0052] The controller 24 is connected to the first temperature measuring element 26, the first flow measuring element 15, the first pressure measuring element 16, the second temperature measuring element 17, the second pressure measuring element 18, the second flow measuring element 19, the liquid level measuring element 20, the third temperature measuring element 21, and the third pressure measuring element 22, respectively.

[0053] The above components enable real-time recording of measurement data from various instruments and the generation of corresponding pressure curves, temperature curves, and flow curves. The controller 24 is also connected to the relief and pressure reduction system at the outlet of the artificial chamber 2 via a data cable, corresponding to the relief quick-opening valve 11 and the venting regulating valve 12. This allows for the full opening / closing of the relief quick-opening valve 11 and the regulation of the flow rate of the released high-pressure air.

[0054] It should be noted that the controller 24 uses a known and commonly used controller and controls or collects data from the above devices through existing algorithms. Those skilled in the art are capable of selecting the corresponding device according to actual needs, without including any improvements to the algorithm.

[0055] As a preferred option, an air injection valve 23 is provided at the input end of the artificial chamber 2.

[0056] The artificial chamber 2 is equipped with a heat insulation layer.

[0057] A second check valve 25 is installed at the inlet of the second heat exchanger 8.

[0058] The following is a specific implementation method. When using the experimental device of this invention to simulate the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel, the specific steps include:

[0059] Step 1: Start the first air compressor 3 and the second air compressor 6, open the anti-surge valve (vent valve) to 100%, and close the check valve on the exhaust pipe to 100%.

[0060] Step two: After confirming that the overall operation is normal, the operator gradually closes the anti-surge valve, the compressor inlet pressure gradually decreases, the outlet pressure increases, and the check valve is opened.

[0061] Step 3: When the outlet pipe pressure of the second air compressor 6 reaches the design pressure, open the air injection valve 23 and record the air flow rate at the start of inflation. When the pressure in the artificial chamber 2 reaches the design pressure, record the corresponding air flow rate at the end of the inflation process. Plot the response curve of the corresponding air flow rate as the pressure in the artificial chamber 2 gradually increases.

[0062] Step 4: Record the temperature and pressure changes inside the artificial chamber 2 in 1-hour increments, from 1 hour to 8 hours.

[0063] Step 5: Keep the outlet pressure of artificial chamber 2 constant, record and plot the data curves of temperature and pressure changes inside artificial chamber 2 from the start of depressurization to the end of depressurization.

[0064] Using the controlled variable method, while keeping other design parameters constant, by changing parameters such as the inflation / deflation rate, minimum operating pressure, and air inlet temperature, steps one to five above were repeated. The response curves of temperature and pressure in the artificial chamber 2 under the corresponding operating conditions as a function of parameters such as the inflation / deflation rate, minimum operating pressure, and air inlet temperature were measured, recorded, and plotted.

[0065] Finally, it should be noted that all components involved in the above embodiments, unless otherwise specified, are components that can be obtained by purchase or construction in the prior art. The above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; for example, the number of compressor stages can be multiple stages connected in series according to the design pressure of the artificial chamber. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An experimental apparatus for simulating the spatiotemporal variation of thermodynamic parameters of high-pressure air in an artificial tunnel, characterized in that, It includes an inflation assembly, a pressure relief assembly, a venting device (1), and an artificial chamber (2); The inflation assembly includes a first air compressor (3), the first output end of the first air compressor (3) is connected to the venting device (1), and the second output end of the first air compressor (3) is connected to the first end of the first check valve (4). The second end of the first check valve (4) is connected to the input end of the first heat exchanger (5), and the output end of the first heat exchanger (5) is connected to the input end of the second air compressor (6); the third end of the first check valve (4) is connected to one end of the anti-surge valve (7); the other end of the anti-surge valve (7) is connected to the output end of the second air compressor (6) and the input end of the second heat exchanger (8); The first output end of the second heat exchanger (8) is connected to the venting device (1), and the second output end of the second heat exchanger (8) is connected to the input end of the artificial chamber (2); The output end of the artificial chamber (2) is connected to the venting device (1) through a pressure relief assembly; The artificial chamber (2) is equipped with a drain valve (9).

2. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 1, characterized in that, It also includes an air filter (10) connected to the input of the first air compressor (3).

3. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 1, characterized in that, The pressure relief assembly includes a quick-opening valve (11) and a venting regulating valve (12) arranged sequentially between the artificial chamber (2) and the venting device (1).

4. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 1, characterized in that, The first output end of the first air compressor (3) is connected to the venting device (1) through the first venting valve (13); The first output end of the second heat exchanger (8) is connected to the venting device (1) through the second venting valve (14).

5. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 1, characterized in that, It also includes a data acquisition component; The data acquisition components include a first temperature measuring element (26), a first flow measuring element (15), a first pressure measuring element (16), a second temperature measuring element (17), a second pressure measuring element (18), a second flow measuring element (19), a liquid level measuring element (20), a third temperature measuring element (21), and a third pressure measuring element (22); The first temperature measuring element (26), the first flow measuring element (15), and the first pressure measuring element (16) are located at the input end of the artificial chamber (2); The second temperature measuring element (17) and the second pressure measuring element (18) are installed on the artificial chamber (2), and the liquid level measuring element (20) is installed inside the artificial chamber (2). The second flow measurement element (19), the third temperature measurement element (21) and the third pressure measurement element (22) are disposed between the artificial chamber (2) and the venting device (1).

6. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 5, characterized in that, An air injection valve (23) is provided at the input end of the artificial chamber (2).

7. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 1, characterized in that, The artificial chamber (2) is provided with a heat insulation layer.

8. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 5, characterized in that, It also includes the controller (24); The controller (24) is connected to the first temperature measuring element (26), the first flow measuring element (15), the first pressure measuring element (16), the second temperature measuring element (17), the second pressure measuring element (18), the second flow measuring element (19), the liquid level measuring element (20), the third temperature measuring element (21), and the third pressure measuring element (22), respectively.

9. The experimental apparatus for simulating the spatiotemporal variation of high-pressure air thermodynamic parameters in an artificial tunnel as described in claim 1, characterized in that, A second check valve (25) is provided at the inlet end of the second heat exchanger (8).

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