A compressed air system waste heat cross-seasonal storage device and method based on solid-state compression card effect

Abstract

The application belongs to the technical field of compressed air energy storage, and particularly relates to a compressed air system waste heat cross-seasonal storage device and method based on solid-state compression card effect, comprising: an air compression loop, a compression heat storage loop and a compression heat release loop. The application recycles compression heat to heat compression card materials, changes the lattice structure of the materials, and stores the compression heat energy in the compression card materials; when heat supply is needed, a certain pressure is applied to the compression card materials, the lattice structure of the materials returns to the original state, and a large amount of heat energy is released. The application can realize cross-seasonal and long-time storage of heat, and can controllably release heat energy according to different heat supply requirements, realizes recycling and reuse of waste heat, and effectively improves energy utilization rate.

Description

Technical Field

[0001] This invention belongs to the field of compressed air energy storage technology, and particularly relates to a device and method for cross-seasonal storage of waste heat from compressed air systems based on the solid-state pressure effect. Background Technology

[0002] The air compression process generates a large amount of heat, which is typically recovered for heating. However, heating demand only occurs in winter, leading to a waste of heat generated during other seasons (spring, summer, and autumn), resulting in low efficiency in heat recovery and utilization. This phenomenon also occurs in areas such as industrial waste heat and solar energy utilization, highlighting the urgent need for cross-seasonal storage and utilization of thermal energy.

[0003] In recent years, researchers have discovered that the entropy change of some compression molding materials can reach ~100 J / (kg·K). In particular, plastic crystal compression molding materials with a glass phase have the characteristic of being able to actively control the release of heat driven by small pressures. This provides a new method for the recovery and storage of compression heat in the air compression process, which is conducive to better improving the utilization efficiency of waste heat and is expected to achieve efficient recovery, stable storage, long-distance transportation and controllable reuse of low-grade waste heat. Summary of the Invention

[0004] Based on the shortcomings of the existing technology, the purpose of this invention is to provide a device and method for cross-seasonal storage of waste heat from compressed air systems based on the solid-state compression effect, which solves the problem of low utilization rate of low-grade compressed heat and realizes cross-seasonal storage and utilization of thermal energy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A seasonal waste heat storage device for compressed air systems based on solid-state compression effect includes an air compression circuit, a compression heat storage circuit, and a compression heat release circuit.

[0007] The air compression circuit is used to compress ambient air in stages and store the compressed air in a compressed air storage tank for use by industrial users;

[0008] The compression heat storage circuit transports the compression heat generated by staged compression of air to the heat storage device for storage through the heat exchange fluid circulating therein.

[0009] The compression heat release circuit extracts the heat energy stored in the heat storage device and the compression heat energy generated by compressed air through the heat exchange fluid, and supplies it to the user.

[0010] Furthermore, the air compression circuit includes a first-stage compressor, a first cooler, a second-stage compressor, a second cooler, a compressed air storage tank, and an industrial user;

[0011] The inlet end of the first-stage compressor is used to receive ambient air. The outlet end of the first-stage compressor is connected to the first inlet end of the first cooler. The first outlet end of the first cooler is connected to the inlet end of the second-stage compressor. The outlet end of the second-stage compressor is connected to the first inlet end of the second cooler. The first outlet end of the second cooler is connected to the inlet end of the compressed air storage tank. The outlet end of the compressed air storage tank is connected to the industrial user.

[0012] Furthermore, the compression heat storage circuit includes a first cooler, a second cooler, a first circulating pump, a first three-way valve, a second three-way valve, a third butterfly valve, a heat storage device, and a fourth butterfly valve;

[0013] The inlet end of the first circulating pump is connected to the inlet end of the first three-way valve. The first outlet end of the first three-way valve is connected to the second inlet end of the second cooler. The second outlet end of the first three-way valve is connected to the second inlet end of the first cooler. The second outlet end of the first cooler is connected to the first inlet end of the second three-way valve. The second outlet end of the second cooler is connected to the second inlet end of the second three-way valve. The outlet end of the second three-way valve is connected to the inlet end of the third butterfly valve. The outlet end of the third butterfly valve is connected to the inlet end of the heat storage device. The outlet end of the heat storage device is connected to the inlet end of the fourth butterfly valve. The outlet end of the fourth butterfly valve is connected to the inlet end of the first circulating pump.

[0014] Furthermore, the compression heat release circuit includes a first cooler, a second cooler, a first circulating pump, a first three-way valve, a second three-way valve, a first butterfly valve, a user heating unit, a second butterfly valve, a heat storage device, a fifth butterfly valve, a second circulating pump, and a sixth butterfly valve;

[0015] The inlet end of the first circulating pump is connected to the inlet end of the first three-way valve. The first outlet end of the first three-way valve is connected to the second inlet end of the second cooler. The second outlet end of the first three-way valve is connected to the second inlet end of the first cooler. The second outlet end of the first cooler is connected to the first inlet end of the second three-way valve. The second outlet end of the second cooler is connected to the second inlet end of the second three-way valve. The outlet end of the second three-way valve is connected to the inlet end of the first butterfly valve. The outlet end of the first butterfly valve is connected to the first inlet end of the user heating unit. The first outlet end of the user heating unit is connected to the inlet end of the second butterfly valve. The outlet end of the second butterfly valve is connected to the inlet end of the first circulating pump.

[0016] The outlet end of the heat storage device is connected to the inlet end of the fifth butterfly valve, the outlet end of the fifth butterfly valve is connected to the second outlet end of the user heating unit, the second outlet end of the user heating unit is connected to the inlet end of the second circulating pump, the outlet end of the second circulating pump is connected to the inlet end of the sixth butterfly valve, and the outlet end of the sixth butterfly valve is connected to the inlet end of the heat storage device.

[0017] Furthermore, the heat storage device includes a front end cap, a pressure actuator, a front tube sheet, a cylinder (22), a baffle plate, a rear tube sheet, a rear end cap, heat exchange tubes, and a clamping material;

[0018] The cylinder body has an inlet and an outlet on one side, and baffles are evenly spaced on the cylinder body. The front end and rear end of the cylinder body are respectively provided with a front tube sheet and a rear tube sheet. Several heat exchange tubes are fixedly installed between the front tube sheet and the rear tube sheet, and each heat exchange tube is filled with pressure clamping material. The front end of the heat exchange tube is provided with a pressure actuator. The front side of the front tube sheet is provided with a front end cap, and the rear side of the rear tube sheet is provided with a rear end cap. The entire heat storage device is sealed by the front end cap and the rear end cap.

[0019] Furthermore, the pressing material includes, but is not limited to, pressing materials with a plastic crystal glass phase such as AMP and m-carborane.

[0020] This invention also provides a method for cross-seasonal storage of waste heat from a compressed air system based on the solid-state compression effect. This method employs the aforementioned device for cross-seasonal storage of waste heat from a compressed air system based on the solid-state compression effect. The storage method includes:

[0021] The air compression process and the heat storage process occur during the summer season.

[0022] Air compression process: Ambient air is compressed by the first-stage compressor and then enters the first cooler to release the heat of compression; the compressed air is further compressed by the second-stage compressor and then enters the second cooler to release the heat of compression; finally, the compressed air enters the compressed air storage tank for industrial users.

[0023] Compression heat storage process: The first butterfly valve, the second butterfly valve, the fifth butterfly valve, and the sixth butterfly valve are closed, while the third butterfly valve and the fourth butterfly valve are opened; the first circulation pump is started, and the heat exchange fluid flows through the first cooler and the second cooler to extract the heat energy, and then flows into the heat storage device through the second three-way valve and the third butterfly valve to store the compression heat energy in the compression material; then, the heat exchange fluid returns to the first circulation pump through the fourth butterfly valve.

[0024] Furthermore, as the heat exchange fluid flows through the energy storage device, the baffles cause the fluid to flow in a tortuous manner within the cylinder, fully releasing heat energy and facilitating better heat exchange with the pressure material. This raises the material's temperature, and under high-temperature conditions, the material's crystal system changes from an orthorhombic cubic system to a cubic system. After cooling to room temperature, it changes from a cubic system to a supercooled cubic system.

[0025] Furthermore, the air compression process and the heat release process occur during the winter season:

[0026] Air compression process: Ambient air is compressed by the first-stage compressor and then enters the first cooler to release the heat of compression; the compressed air is further compressed by the second-stage compressor and then enters the second cooler to release the heat of compression; finally, the compressed air enters the compressed air storage tank for industrial users.

[0027] Compression heat release process: The fifth and sixth butterfly valves open, and the third and fourth butterfly valves close; the pressure actuator starts, applying pressure to the compression material, and the material temperature rises; the second circulation pump starts, and the heat exchange fluid enters the heat storage device through the sixth butterfly valve, exchanges heat with the compression material, the temperature of the heat exchange fluid rises, and flows into the user's heating unit through the fifth butterfly valve, releasing heat to provide heating to the user; the temperature of the heat exchange fluid decreases, and returns to the heat storage device through the second circulation pump and the sixth butterfly valve.

[0028] At this time, the heat stored in the heat storage device is released, and the first butterfly valve and the second butterfly valve are opened; the first circulation pump starts, and the heat exchange fluid flows through the first cooler and the second cooler to extract the compressed heat energy, flows into the user's heating unit through the second three-way valve and the first butterfly valve, releases heat to the user, and then flows back to the first circulation pump through the second butterfly valve.

[0029] Furthermore, when the heat storage device needs to release the stored heat, the pressure actuator is activated to apply pressure to the compression material in the heat exchange tube. The material undergoes a solid-solid phase change, changing from a supercooled cubic crystal system to an orthorhombic cubic crystal system, while releasing heat. The material temperature rises, and the heat exchange fluid flows through the heat storage device to exchange heat with the material, extracting the stored compressed heat energy to provide heat to the user.

[0030] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. This invention recovers and stores the heat generated by compressed air through lattice changes in the pressure material for use in winter heating, realizing the cross-seasonal recovery and utilization of waste heat and effectively improving energy utilization efficiency.

[0032] 2. By using a plastic crystal pressing material with a glass phase, the present invention can achieve cross-seasonal, long-distance, and long-term heat storage without any insulation measures.

[0033] 3. The present invention uses a plastic crystal pressing material with a glass phase, which has high pressure sensitivity and can release heat with a low driving pressure; wherein, the heat storage device can controllably release heat energy according to different heat demand.

[0034] 4. This invention enables the storage of heat across seasons and for extended periods, and allows for the controlled release of heat energy according to different heat demand requirements, thereby realizing the recovery and reuse of waste heat and effectively improving energy utilization.

[0035] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, the following detailed description is provided in conjunction with preferred embodiments and accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0037] Figure 1 This is a schematic diagram of the structure of the present invention.

[0038] In the picture:

[0039] 1-First stage compressor, 2-First cooler, 3-Second stage compressor, 4-Second cooler, 5-Compressed air storage tank, 6-Industrial user, 7-First circulating pump, 8-First three-way valve, 9-Second three-way valve, 10-First butterfly valve, 11-User heating unit, 12-Second butterfly valve, 13-Third butterfly valve, 14-Heat storage device, 15-Fourth butterfly valve, 16-Fifth butterfly valve, 17-Second circulating pump, 18-Sixth butterfly valve, 19-Front end cap, 20-Pressure actuator, 21-Front tube sheet, 22-Cylinder body, 23-Baffle plate, 24-Rear tube sheet, 25-Rear end cap, 26-Heat exchange tube, 27-Pressure clamping material. Detailed Implementation

[0040] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this specification. These embodiments illustrate the principles of the invention, and other aspects, features, and advantages of the invention will become apparent from this detailed description. In the accompanying drawings, the same or similar parts in different figures are indicated by the same reference numerals.

[0041] To address the problem of wasted compressed heat energy and reduced thermal efficiency caused by the simple recovery and storage methods currently used in compressed air energy storage systems, this invention provides a device and method for cross-seasonal storage of waste heat from compressed air systems based on the solid-state compression effect. This method stores and reuses low-grade compressed heat energy, achieving efficient heat utilization.

[0042] This invention includes an air compression circuit, a compression heat storage circuit, and a compression heat release circuit. During summer, ambient air is compressed by a first-stage compressor 1 and then enters a first cooler 2 to release compression heat energy. The compressed air is further compressed by a second-stage compressor 3 and then enters a second cooler 4 to release compression heat energy. Finally, the compressed air enters a compressed air storage tank 5 and is supplied to industrial users 6. The first-stage and second-stage compression heat are stored in a heat storage device 14 via the compression heat storage circuit. During winter, when heating demand is high, the compression heat generated by the compressed air is directly used for heating through the compression heat release circuit, while the heat energy stored in the heat storage device 14 is released for user heating.

[0043] This invention effectively improves energy utilization by recovering and storing low-grade compressed heat energy for heating. In addition, the use of pressure material 27 in the heat storage device 14 allows heat to be stored across seasons and for extended periods, effectively resolving the energy supply and demand contradictions in different seasons.

[0044] In one embodiment of the present invention, a transseasonal waste heat storage device for compressed air systems based on the solid-state compression effect is provided. As shown in the figure, in this embodiment, the device includes: an air compression circuit, a compression heat storage circuit, and a compression heat release circuit.

[0045] An air compression circuit is used to compress ambient air in stages and store the compressed air in a compressed air storage tank 5 for use by industrial users 6.

[0046] The compression heat storage loop transports the compression heat generated by the staged compression of air to the heat storage device 14 for storage through the heat exchange fluid circulating in it;

[0047] The compression heat release circuit extracts the heat energy stored in the heat storage device 14 and the compression heat energy generated by compressed air through the heat exchange fluid and supplies it to the user.

[0048] In the above embodiments, the air compression circuit includes at least two stages of compression and cooling structures connected in series and a compressed air storage tank 5. Each stage of the compression and cooling structure includes a compressor and a cooler connected in series.

[0049] Ambient air is compressed and cooled by compressors and coolers in the various compression and cooling structures, and then stored in compressed air storage tank 5 for use by industrial users 6.

[0050] In this embodiment, optionally, such as Figure 1 As shown, a two-stage compression and cooling structure is adopted, including: a first-stage compressor 1, a first-stage cooler 2, a second-stage compressor 3, a second-stage cooler 4, a compressed air storage tank 5, and an industrial user 6.

[0051] Specifically, the inlet end of the first-stage compressor 1 is used to receive ambient air, the outlet end of the first-stage compressor 1 is connected to the first inlet end of the first cooler 2, the first outlet end of the first cooler 2 is connected to the inlet end of the second-stage compressor 3, the outlet end of the second-stage compressor 3 is connected to the first inlet end of the second cooler 4, the first outlet end of the second cooler 4 is connected to the inlet end of the compressed air storage tank 5, and the outlet end of the compressed air storage tank 5 is connected to the industrial user 6.

[0052] In the above embodiments, the air compression circuit is mainly used to compress the ambient air in stages and store the compressed air in the compressed air storage tank 5 for use by industrial users 6.

[0053] In this embodiment, optionally, such as Figure 1 As shown, the compression heat storage circuit transports the compression heat generated by staged air compression to the heat storage device 14 for storage, including: a first cooler 2, a second cooler 4, a first circulating pump 7, a first three-way valve 8, a second three-way valve 9, a third butterfly valve 13, the heat storage device 14, and a fourth butterfly valve 15.

[0054] Specifically, the inlet end of the first circulating pump 7 is connected to the inlet end of the first three-way valve 8, the first outlet end of the first three-way valve 8 is connected to the second inlet end of the second cooler 4, the second outlet end of the first three-way valve 8 is connected to the second inlet end of the first cooler 2, the second outlet end of the first cooler 2 is connected to the first inlet end of the second three-way valve 9, the second outlet end of the second cooler 4 is connected to the second inlet end of the second three-way valve 9, the outlet end of the second three-way valve 9 is connected to the inlet end of the third butterfly valve 13, the outlet end of the third butterfly valve 13 is connected to the inlet end of the heat storage device 14, the outlet end of the heat storage device 14 is connected to the inlet end of the fourth butterfly valve 15, and the outlet end of the fourth butterfly valve 15 is connected to the inlet end of the first circulating pump 7.

[0055] In the above embodiments, the compression heat storage circuit can store excess compression heat for a long time and release the heat to provide heating to users when needed.

[0056] In the above embodiments, the compression heat storage circuit and the air compression circuit share the first cooler 2 and the second cooler 4.

[0057] In this embodiment, optionally, such as Figure 1 As shown, the compression heat release circuit supplies the user with the heat energy stored in the heat storage device 14 and the compressed heat energy of compressed air, including: a first cooler 2, a second cooler 4, a first circulating pump 7, a first three-way valve 8, a second three-way valve 9, a first butterfly valve 10, a user heating unit 11, a second butterfly valve 12, a heat storage device 14, a fifth butterfly valve 16, a second circulating pump 17, and a sixth butterfly valve 18.

[0058] Specifically, the inlet end of the first circulating pump 7 is connected to the inlet end of the first three-way valve 8, the first outlet end of the first three-way valve 8 is connected to the second inlet end of the second cooler 4, the second outlet end of the first three-way valve 8 is connected to the second inlet end of the first cooler 2, the second outlet end of the first cooler 2 is connected to the first inlet end of the second three-way valve 9, the second outlet end of the second cooler 4 is connected to the second inlet end of the second three-way valve 9, the outlet end of the second three-way valve 9 is connected to the inlet end of the first butterfly valve 10, the outlet end of the first butterfly valve 10 is connected to the first inlet end of the user heating unit 11, the first outlet end of the user heating unit 11 is connected to the inlet end of the second butterfly valve 12, and the outlet end of the second butterfly valve 12 is connected to the inlet end of the first circulating pump 7.

[0059] The heat storage device 14 is connected to the inlet end of the fifth butterfly valve 16, the outlet end of the fifth butterfly valve 16 is connected to the second inlet end of the user heating unit 11, the second outlet end of the user heating unit 11 is connected to the inlet end of the second circulating pump 17, the outlet end of the second circulating pump 17 is connected to the inlet end of the sixth butterfly valve 18, and the outlet end of the sixth butterfly valve 18 is connected to the inlet end of the heat storage device 14.

[0060] In the above embodiments, the compression heat release circuit directly uses excess compression heat for heating, and the stored compression heat can be selectively released for heating.

[0061] In the above embodiments, the compression heat release circuit shares the first cooler 2 and the second cooler 4 with the air compression circuit; and shares the first cooler 2, the second cooler 4, the first circulating pump 7, the first three-way valve 8, the second three-way valve 9 and the heat storage device 14 with the compression heat storage circuit.

[0062] Specifically, the heat storage device 14 includes: a front end cap 19, a pressure actuator 20, a front tube sheet 21, a cylinder 22, a baffle plate 23, a rear tube sheet 24, a rear end cap 25, heat exchange tubes 26, and a clamping material 27.

[0063] The cylinder body 22 has an inlet and an outlet on one side, and baffles 23 are evenly spaced on the cylinder body 22. The front end and the rear end of the cylinder body 22 are respectively provided with a front tube sheet 21 and a rear tube sheet 24. Several heat exchange tubes 26 are fixedly installed between the front tube sheet 21 and the rear tube sheet 24. Each heat exchange tube 26 is filled with a pressure clamping material 27. The front end of the heat exchange tube 26 is provided with a pressure actuator 20. The front end of the front tube sheet 21 is provided with a front end cap 19, and the rear end cap 25 is provided with a rear end cap 25. The entire heat storage device 14 is sealed by the front end cap 19 and the rear end cap 25.

[0064] In one embodiment of the present invention, a method for cross-seasonal storage of waste heat from a compressed air system based on the solid-state compression effect is provided. This method is based on the system implementation described in the above embodiments. In this embodiment, the method includes an air compression process, a compression heat storage process, and a compression heat release process.

[0065] 1) The air compression process and the compression heat storage process occur during the summer months and include the following steps:

[0066] 11) Ambient air is compressed into compressed air after passing through a two-stage compression and cooling structure, releasing heat energy; the compressed air enters the compressed air storage tank 5 and is supplied to industrial users 6.

[0067] 12) The heat energy generated by the compressed air is extracted by the heat exchange fluid circulating in the compressed heat storage circuit through the coolers of each stage, and the heat energy is stored in the pressure material 27 in the heat exchange tube 26 when it flows through the heat storage device 14.

[0068] 2) The air compression process and the heat release process occur during the winter season and include the following steps:

[0069] 21) At this time, the heat energy generated during the air compression process will be directly supplied to the user for heating;

[0070] 22) The pressure actuator 20 in the heat storage device is started, and pressure is applied to the clamping material 27 in the heat exchange tube 26. The material releases heat and the temperature rises. The heat exchange fluid extracts the heat to provide heat to the user.

[0071] In this embodiment, a two-stage compression cooling structure and a heat storage device are used as examples for detailed explanation. Specifically, the method for cross-seasonal storage of waste heat from a compressed air system based on the solid-state compression effect is as follows:

[0072] 1) The air compression process and the compression heat storage process occur during the summer season:

[0073] Air compression process: Ambient air is compressed by the first stage compressor 1 and then enters the first cooler 2 to release the heat energy of compression; the compressed air is further compressed by the second stage compressor 3 and then enters the second cooler 4 to release the heat energy of compression; finally, the compressed air enters the compressed air storage tank 5 and is supplied to industrial users 6.

[0074] Compression heat storage process: First butterfly valve 10, second butterfly valve 12, fifth butterfly valve 16 and sixth butterfly valve 18 are closed, and third butterfly valve 13 and fourth butterfly valve 15 are opened; first circulation pump 7 is started, heat exchange fluid flows through first cooler 2 and second cooler 4 to extract heat energy, and flows into heat storage device 14 through second three-way valve 9 and third butterfly valve 13 to store compression heat energy in compression material 27; then, heat exchange fluid returns to first circulation pump 7 through fourth butterfly valve 15.

[0075] Specifically, the heat exchange fluid flows through the energy storage device 14, and the baffle plate 23 causes the heat exchange fluid to flow in a tortuous manner within the cylinder 22, fully releasing heat energy and better exchanging heat with the pressure material 27, causing the material temperature to rise. Under high temperature conditions, the material's crystal system changes from an orthorhombic cubic system to a cubic system. After cooling to room temperature, under normal temperature conditions, it changes from a cubic system to a supercooled cubic system.

[0076] 2) The air compression process and the heat release process occur during the winter period:

[0077] Air compression process: Ambient air is compressed by the first stage compressor 1 and then enters the first cooler 2 to release the heat energy of compression; the compressed air is further compressed by the second stage compressor 3 and then enters the second cooler 4 to release the heat energy of compression; finally, the compressed air enters the compressed air storage tank 5 and is supplied to industrial users 6.

[0078] Compression heat release process: The fifth butterfly valve 16 and the sixth butterfly valve 18 are opened, and the third butterfly valve 13 and the fourth butterfly valve 15 are closed; the pressure actuator 20 is started, applying pressure to the compression material 27, and the material temperature rises; the second circulation pump 17 is started, and the heat exchange fluid enters the heat storage device 14 through the sixth butterfly valve 18, exchanges heat with the compression material 27, the temperature of the heat exchange fluid rises, and flows into the user heating unit 11 through the fifth butterfly valve 16, releasing heat to provide heating to the user. The temperature of the heat exchange fluid decreases, and returns to the heat storage device 14 through the second circulation pump 17 and the sixth butterfly valve 18.

[0079] At this time, the heat stored in the heat storage device 14 is also released, the first butterfly valve 10 and the second butterfly valve 12 are opened; the first circulation pump 7 is started, the heat exchange fluid flows through the first cooler 2 and the second cooler 4 to extract the compressed heat energy, and flows into the user heating unit 11 through the second three-way valve 9 and the first butterfly valve 10 to release heat to the user, and then flows back to the first circulation pump 7 through the second butterfly valve 12.

[0080] When the heat storage device 14 needs to release the stored heat, the pressure actuator 20 is activated to apply pressure to the clamping material 27 in the heat exchange tube 26. The material undergoes a solid-solid phase change, changing from a supercooled cubic crystal system to an orthorhombic cubic crystal system, while releasing heat. The material temperature rises, and the heat exchange fluid flows through the heat storage device to exchange heat with the material, extracting the stored compressed heat energy to provide heat to the user.

[0081] In summary, this invention enables the storage of heat across seasons and for extended periods, and allows for the controlled release of heat energy according to different heat demands, thereby achieving the recovery and reuse of waste heat and effectively improving energy utilization.

[0082] The above description is merely a preferred embodiment of the present invention, and should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A device for storing waste heat from a compressed air system across seasons based on the solid-state compression effect, characterized in that, This includes an air compression circuit, a compression heat storage circuit, and a compression heat release circuit; An air compression circuit is used to compress ambient air in stages and store the compressed air in a compressed air tank for use by industrial users. The compression heat storage loop transports the heat generated by staged compression of air to the heat storage device for storage through the heat exchange fluid circulating within it; The compression heat release circuit extracts the heat energy stored in the heat storage device and the compression heat energy generated by compressed air through heat exchange fluid and supplies it to the user; The air compression circuit includes a first-stage compressor, a first cooler, a second-stage compressor, a second cooler, a compressed air storage tank, and an industrial user; The inlet of the first-stage compressor is used to receive ambient air. The outlet of the first-stage compressor is connected to the first inlet of the first cooler. The first outlet of the first cooler is connected to the inlet of the second-stage compressor. The outlet of the second-stage compressor is connected to the first inlet of the second cooler. The first outlet of the second cooler is connected to the inlet of the compressed air storage tank. The outlet of the compressed air storage tank is connected to the industrial user. The compression heat storage circuit includes a first cooler, a second cooler, a first circulating pump, a first three-way valve, a second three-way valve, a third butterfly valve, a heat storage device, and a fourth butterfly valve; The outlet end of the first circulating pump is connected to the inlet end of the first three-way valve. The first outlet end of the first three-way valve is connected to the second inlet end of the second cooler. The second outlet end of the first three-way valve is connected to the second inlet end of the first cooler. The second outlet end of the first cooler is connected to the first inlet end of the second three-way valve. The second outlet end of the second cooler is connected to the second inlet end of the second three-way valve. The outlet end of the second three-way valve is connected to the inlet end of the third butterfly valve. The outlet end of the third butterfly valve is connected to the inlet end of the heat storage device. The outlet end of the heat storage device is connected to the inlet end of the fourth butterfly valve. The outlet end of the fourth butterfly valve is connected to the inlet end of the first circulating pump. The compression heat release circuit includes a first cooler, a second cooler, a first circulating pump, a first three-way valve, a second three-way valve, a first butterfly valve, a user heating unit, a second butterfly valve, a heat storage device, a fifth butterfly valve, a second circulating pump, and a sixth butterfly valve; The outlet end of the second three-way valve is connected to the inlet end of the first butterfly valve, the outlet end of the first butterfly valve is connected to the first inlet end of the user's heating unit, the first outlet end of the user's heating unit is connected to the inlet end of the second butterfly valve, and the outlet end of the second butterfly valve is connected to the inlet end of the first circulating pump. The outlet end of the heat storage device is connected to the inlet end of the fifth butterfly valve, the outlet end of the fifth butterfly valve is connected to the second inlet end of the user's heating unit, the second outlet end of the user's heating unit is connected to the inlet end of the second circulating pump, the outlet end of the second circulating pump is connected to the inlet end of the sixth butterfly valve, and the outlet end of the sixth butterfly valve is connected to the inlet end of the heat storage device. The thermal storage device includes a front end cap, a pressure actuator, a front tube sheet, a cylinder, baffles, a rear tube sheet, a rear end cap, heat exchange tubes, and clamping material; An inlet and an outlet are respectively provided on one side of the cylinder. Baffles are evenly spaced on the cylinder. A front tube sheet and a rear tube sheet are respectively provided at the front and rear ends of the cylinder. Several heat exchange tubes are fixedly installed between the front tube sheet and the rear tube sheet. Each heat exchange tube is filled with pressure clamping material. A pressure actuator is provided at the front end of the heat exchange tube. A front end cap is provided on the front side of the front tube sheet and a rear end cap is provided on the rear side of the rear tube sheet. The entire heat storage device is sealed by the front end cap and the rear end cap. The pressing material is AMP or m-carborane.

2. The waste heat storage device for a compressed air system based on solid-state compression effect as described in claim 1, characterized in that, The heat exchange fluid flows through the energy storage device. The baffle plate makes the heat exchange fluid flow in a tortuous manner in the cylinder, fully releasing heat energy. It can exchange heat with the pressure material, causing the material temperature to rise. Under high temperature conditions, the material crystal system changes from a skew cubic crystal system to a cubic crystal system. After cooling down to room temperature, under room temperature conditions, it changes from a cubic crystal system to a supercooled cubic crystal system.

3. The waste heat storage device for a compressed air system based on solid-state compression effect as described in claim 1, characterized in that, When the heat storage device needs to release stored heat, the pressure actuator is activated, applying pressure to the compression material in the heat exchange tube. The material undergoes a solid-solid phase change, transforming from a supercooled cubic crystal system to an orthorhombic cubic crystal system, releasing heat at the same time. The material temperature rises, and the heat exchange fluid flows through the heat storage device to exchange heat with the material, extracting the stored compressed heat energy to provide heat to the user.

4. The waste heat storage device for a compressed air system based on solid-state compression effect as described in claim 1, characterized in that, The storage method of the storage device includes: The air compression process and the heat storage process occur during the summer season. Air compression process: Ambient air is compressed by the first-stage compressor and then enters the first cooler to release the heat of compression; the compressed air is further compressed by the second-stage compressor and then enters the second cooler to release the heat of compression; finally, the compressed air enters the compressed air storage tank for industrial users. Compression heat storage process: The first butterfly valve, the second butterfly valve, the fifth butterfly valve, and the sixth butterfly valve are closed, while the third butterfly valve and the fourth butterfly valve are opened; the first circulation pump is started, and the heat exchange fluid flows through the first cooler and the second cooler to extract the heat energy, and then flows into the heat storage device through the second three-way valve and the third butterfly valve to store the compression heat energy in the compression material; then, the heat exchange fluid returns to the first circulation pump through the fourth butterfly valve. Storage methods also include: The air compression process and the heat release process occur during the winter season: Air compression process: Ambient air is compressed by the first-stage compressor and then enters the first cooler to release the heat of compression; the compressed air is further compressed by the second-stage compressor and then enters the second cooler to release the heat of compression; finally, the compressed air enters the compressed air storage tank for industrial users. Compression heat release process: The fifth and sixth butterfly valves open, and the third and fourth butterfly valves close; the pressure actuator starts, applying pressure to the compression material, and the material temperature rises; the second circulation pump starts, and the heat exchange fluid enters the heat storage device through the sixth butterfly valve, exchanges heat with the compression material, the temperature of the heat exchange fluid rises, and flows into the user's heating unit through the fifth butterfly valve, releasing heat to provide heating to the user; the temperature of the heat exchange fluid decreases, and returns to the heat storage device through the second circulation pump and the sixth butterfly valve. At this time, the heat stored in the heat storage device is released, and the first butterfly valve and the second butterfly valve are opened; the first circulation pump starts, and the heat exchange fluid flows through the first cooler and the second cooler to extract the compressed heat energy, flows into the user's heating unit through the second three-way valve and the first butterfly valve, releases heat to the user, and then flows back to the first circulation pump through the second butterfly valve.

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