Multi-runner thermal chemical reaction device based on shape memory structure

Abstract

The invention provides a multi-flow-channel thermal chemical reaction device based on a shape memory structure. The multi-flow-channel thermal chemical reaction device comprises a main body, an inner pipe and porous fins, and a cavity is formed in the main body; the inner pipe is arranged in the cavity, a flowing channel is formed in the inner pipe, and a shape memory structure is arranged in the flowing channel; a plurality of reaction chambers are formed among the inner wall of the cavity, the inner pipe and the porous fins; when the shape memory structure is at a first preset temperature, the shape memory structure extends in the radial direction of the flow channel, and when the shape memory structure is at a second preset temperature, part of the shape memory structure is bent and extends in the axial direction of the flow channel. Compared with the prior art, in the multi-flow-channel thermal chemical reaction device based on the shape memory structure, the shape of the shape memory structure can be adjusted according to different stages of a heat storage process / a heat release process, so that the flow resistance of a heat transfer medium is effectively adjusted, the heat transfer effect is improved, and the heat transfer area is increased.

Description

Technical Field

[0001] This invention relates to the field of thermal energy storage technology, and more specifically to a multi-channel thermochemical reaction device based on a shape memory structure. Background Technology

[0002] Thermochemical energy storage reactors utilize the thermal effect of chemical reactions to store and release thermal energy. When there is excess heat in industry, a thermochemical energy storage reactor can be used to store the excess heat. When thermal energy is needed, the stored heat in the thermochemical energy storage reactor can be released, thereby saving costs and improving environmental protection.

[0003] Please see Figure 1 The thermochemical energy storage reactor is a fixed-bed structure. The main body of the reactor is a heat storage material (such as calcium hydroxide), which is stored inside the reactor in a free-stacking manner. Gas distribution spaces are provided above and below the heat storage material. The high-temperature drying medium obtains heat from waste heat generated during factory production or solar energy. During the heat storage process, the high-temperature drying medium enters the reactor from the bottom and then passes through the main body of the heat storage material. The heat storage material is heated and dehydrated (Ca(OH)2→CaO+H2O, ΔH=104.4 kJ / mol), thereby absorbing the heat energy of the high-temperature drying medium. The temperature of the high-temperature drying medium decreases, and it mixes with the water vapor released from the heat storage material to become a low-temperature humid medium. The low-temperature humid medium flows out of the reactor from the top. During the heat release process, the low-temperature moist medium enters the reactor from the bottom. After being dehydrated, the heat storage material combines with water to release heat (CaO+H2O→Ca(OH)2, ΔH=-104.4 kJ / mol), which in turn heats the low-temperature moist medium. The heated low-temperature moist medium becomes a high-temperature dry medium and is discharged from the top of the reactor. The heat energy it carries can be used in other processes.

[0004] In traditional thermochemical energy storage reactors, the heat storage material is simply piled up, and the heat transfer medium is blown directly toward the heat storage material. This usually only causes the surface of the heat storage material to react. Especially during the heat release process, heat is difficult to transfer to the center of the piled heat storage material, resulting in poor heat transfer efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a multi-channel thermochemical reaction device based on shape memory structure.

[0006] One embodiment of the present invention provides a multi-channel thermochemical reaction device based on a shape memory structure, comprising: The main body has a cavity inside, and a plurality of first air inlets and a plurality of air outlets are respectively provided at both ends of the cavity; An inner tube is disposed within the cavity, and a flow channel is formed inside the inner tube. The flow channel extends from the first air inlet to the air outlet, and a shape memory structure is disposed within the flow channel. A plurality of porous fins are arranged sequentially around the inner tube. The porous fins are provided with a plurality of first through holes. A plurality of reaction chambers for containing heat storage material are formed between the inner wall of the cavity, the inner tube and the plurality of porous fins. The plurality of reaction chambers are arranged sequentially around the inner tube. Adjacent reaction chambers are connected through the first through holes. The two ends of the reaction chamber are respectively connected to the first air inlet and the air outlet. Wherein, when the shape memory structure is at a first preset temperature, the shape memory structure extends in the radial direction of the flow channel; when the shape memory structure is at a second preset temperature, a portion of the shape memory structure bends and extends toward the axial direction of the flow channel, wherein the first preset temperature is lower than the second preset temperature.

[0007] In some optional embodiments, the shape memory structure includes a plurality of shape memory baffles, which are arranged sequentially along the axial direction of the flow channel; When the shape memory baffle is at a first preset temperature, the shape memory baffle extends in the radial direction of the flow channel. When the shape memory baffle is at a second preset temperature, the shape memory baffle includes a base and a curved portion connected to each other. The base extends in the radial direction of the flow channel, and the curved portion bends relative to the base and extends in the axial direction of the flow channel.

[0008] In some alternative embodiments, the multiple shape memory baffles are divided into multiple groups, each group including multiple shape memory baffles, the multiple groups of shape memory baffles are arranged sequentially along the circumference of the flow channel, and the multiple shape memory baffles in the same group are arranged sequentially along the axial direction of the flow channel.

[0009] In some alternative embodiments, the multi-channel thermochemical reactor based on shape memory structure also includes a porous baffle. The porous baffle is arranged around the plurality of porous fins, and the plurality of reaction chambers are formed on the inner side of the porous baffle, between the inner tube and the plurality of porous fins; An annular outer cavity is formed between the outer side of the porous enclosure and the inner wall of the cavity. The porous enclosure is provided with a plurality of second through holes, and the annular outer cavity is connected to the reaction chamber through the second through holes.

[0010] In some alternative embodiments, the multi-channel thermochemical reaction apparatus based on shape memory structure further includes a plurality of radial partition plates disposed between the inner tube and the porous surrounding plate and arranged around the inner tube, wherein the plurality of radial partition plates are arranged sequentially along the extension direction of the flow channel; The radial partition plates divide each reaction chamber into multiple sub-chambers, which are arranged sequentially along the extension direction of the flow channel. The radial partition plates are provided with multiple vent holes, and adjacent sub-chambers of the same reaction chamber are connected through several of the vent holes.

[0011] In some alternative implementations, the different groups of shape memory baffles are offset from each other in the axial direction of the flow channel.

[0012] In some alternative embodiments, a plurality of the vent holes are arranged sequentially around the inner tube, and adjacent sub-chambers of the same reaction chamber are connected through the plurality of vent holes.

[0013] In some optional embodiments, a plurality of first air inlets and a plurality of air outlets are respectively provided at both ends of the cavity; Multiple first air inlets are arranged sequentially around the flow channel; Multiple air outlets are arranged sequentially around the flow channel.

[0014] In some optional embodiments, the main body is further provided with a pressure equalization chamber, one end of which is provided with a second air inlet, and the other end of which is connected to the flow channel and a plurality of first air inlets.

[0015] In some alternative embodiments, the inner diameter of the equalizing chamber gradually increases in the direction from the second air inlet to the flow channel.

[0016] Compared to existing technologies, in the multi-channel thermochemical reaction device based on shape memory structure of the present invention, the heat brought by the heat transfer medium can be transferred through the porous fins, thereby enhancing the radial heat transfer uniformity within the cavity. Moreover, the heat transfer medium can also flow freely to other areas through the porous fins, which is beneficial to improving the uniformity of heat and mass transfer. The shape memory structure can adjust its shape according to different stages of the heat storage / heat release process, thereby effectively adjusting the flow resistance of the heat transfer medium and improving the heat transfer effect. In addition, it is beneficial to extend the flow time of the heat transfer medium in the inner tube, enhancing the heat transfer effect, and also beneficial to increase the heat transfer area. The porous fins and multiple radial partition plates can reduce the thickness of the heat storage material in the axial and radial directions of the flow channel, which is equivalent to dividing the heat storage material into several "thin layers", which is beneficial to the smooth passage of the heat transfer medium.

[0017] To provide a clearer understanding of the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a thermochemical energy storage reactor in the background technology, showing the heat storage and heat release processes. Figure 2 This is a cross-sectional view of a multi-channel thermochemical reaction apparatus based on a shape memory structure according to an embodiment of the present invention; Figure 3 This is an exploded view of a multi-channel thermochemical reaction apparatus based on a shape memory structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a multi-channel thermochemical reaction device based on shape memory structure according to an embodiment of the present invention when the structure is partially concealed; Figure 5 This is a schematic diagram of one side of a multi-channel thermochemical reaction device based on a shape memory structure according to an embodiment of the present invention, with some parts of the structure hidden. Figure 6 This is a cross-sectional view of the inner tube of an embodiment of the present invention when the shape memory structure is at a first preset temperature; Figure 7 This is a cross-sectional view of the inner tube of an embodiment of the present invention when the shape memory structure is at a second preset temperature; Figure 8 This is a schematic diagram of one side of a multi-channel thermochemical reaction device based on a shape memory structure, according to another embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 10. Main body; 11. First air inlet; 12. Air outlet; 13. Pressure equalization chamber; 14. Second air inlet; 20. Inner tube; 21. Flow channel; 22. Shape memory structure; 221. Shape memory baffle; 222. Base; 223. Bending section; 30. Perforated fins; 31. First through hole; 40. Perforated enclosure; 41. Reaction chamber; 411. Sub-chamber; 42. Annular outer cavity; 43. Second through hole; 50. Radial partition plate; 51. Vent hole. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. Furthermore, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In the description of this invention, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Please see Figures 2 to 5 One embodiment of the present invention provides a thermochemical reactor with porous fins 30, comprising: The main body 10 has a cavity inside, and a plurality of first air inlets 11 and a plurality of air outlets 12 are respectively provided at both ends of the cavity. An inner tube 20 is disposed within a cavity, and a flow channel 21 is formed inside the inner tube 20. The flow channel 21 extends from the first air inlet 11 to the air outlet 12. The heat transfer medium can pass through the flow channel 21, and the heat of the heat transfer medium can be transferred to the outside of the inner tube 20. A shape memory structure 22 is disposed inside the flow channel 21. When the shape memory structure 22 is at a first preset temperature, the shape memory structure 22 extends in the radial direction of the flow channel 21. When the shape memory structure 22 is at a second preset temperature, part of the shape memory structure 22 bends and extends in the axial direction of the flow channel 21. The first preset temperature is lower than the second preset temperature. A porous fin 30, multiple porous fins 30 are arranged sequentially around the inner tube 20, and multiple first through holes 31 are provided on the porous fins 30; A porous baffle plate 40 is arranged around multiple porous fins 30. Multiple reaction chambers 41 for containing heat storage material are formed between the inner side of the porous baffle plate 40, the inner tube 20, and the multiple porous fins 30. The multiple reaction chambers 41 are arranged sequentially around the inner tube 20. Adjacent reaction chambers 41 are connected through a first through hole 31. The two ends of the reaction chamber 41 are connected to a first air inlet 11 and an air outlet 12, respectively. The heat transfer medium enters the reaction chamber 41 from the first air inlet 11 and can then flow out from the air outlet 12. In addition, the heat transfer medium can be connected between adjacent reaction chambers 41 through the first through hole 31 to make the reaction more complete.

[0025] An annular outer cavity 42 is formed between the outer side of the porous baffle 40 and the inner wall of the cavity. Multiple second through holes 43 are provided on the porous baffle 40. The annular outer cavity 42 is connected to the reaction chamber 41 through the second through holes 43.

[0026] The heat storage material can be designed according to actual needs. In this embodiment, the heat storage material can be calcium hydroxide.

[0027] Please see Figures 6 to 8 The working principle of a thermochemical reactor with porous fins 30 according to an embodiment of the present invention is described below: In the process of heat storage in a thermochemical reactor with porous fins 30, the dry, high-temperature heat transfer medium, after entering the main body 10, will be divided into three parts: The heat transfer medium in the first part will enter from one end of the flow channel 21 and then flow out from the other end of the flow channel 21. At the beginning stage of the heat storage process, the temperature in the flow channel 21 is at the first preset temperature. At this time, the shape memory structure 22 extends radially relative to the flow channel 21. When the high-temperature dry heat transfer medium enters the flow channel 21, the flow resistance is large due to the influence of the shape memory structure 22, and the flow velocity of the heat transfer medium is greatly reduced. This can prolong the heat transfer time of the heat transfer medium, the inner tube 20 and the heat storage material around the inner tube 20, thereby increasing the total indirect heat exchange between the heat transfer medium and the heat storage material and improving the heat storage efficiency. As the reaction time progresses, the heat storage reaction gradually moves away from the heat storage material in the inner tube 20. At this time, it is necessary to enhance the convective heat transfer between the heat transfer medium and the inner tube 20. As the reaction time progresses, the shape memory structure 22 will gradually heat up, and the shape memory structure 22 in the inner tube 20 will gradually deform due to heat. After the temperature exceeds the second preset temperature, part of the shape memory structure 22 bends and extends in the axial direction of the flow channel 21. The flow resistance of the heat transfer medium in the inner tube 20 decreases, the flow velocity increases, and the convective heat transfer between the heat transfer medium and the shape memory structure 22 is enhanced. The shape memory structure 22 in the inner tube 20 allows for different heat transfer dominance modes at different stages of the heat storage process. In the initial stage of heat storage, rapid heating of the cavity is required. At this time, extending the heat transfer time between the inner tube 20 and the surrounding heat storage material can improve the heat transfer efficiency of the high-temperature, dry heat transfer medium. As the reaction gradually moves further away from the inner tube 20 and radially deeper, the deformed shape memory structure 22 reduces the resistance of the heat transfer medium within the inner tube 20, enhances convective heat transfer between the heat transfer medium and the shape memory alloy baffle, and also avoids localized overheating. Furthermore, the shape memory structure 22 can also effectively increase the heat transfer area. The heat transfer medium in the second part will enter the reaction chamber 41 from the first air inlet 11 and then undergo a dehydration reaction with the heat storage material. The heat transfer medium in the adjacent reaction chambers 41 can flow to each other, improving the flowability of the heat transfer medium in the radial direction of the reaction chamber 41 and avoiding situations such as high local air pressure, large temperature difference of the overall reactor, and low heat storage efficiency near the first air inlet 11. The third heat transfer medium will enter the annular outer cavity 42 and can enter various positions in the axial direction of the reaction chamber 41 through the second through hole 43, improving the flow of the heat transfer medium in the axial direction of the reaction chamber 41. Furthermore, the heat from the third heat transfer medium can also be conducted to the porous surrounding plate 40, and the heat from the porous surrounding plate 40 can be conducted to the axial side of the reaction chamber 41, improving the heat uniformity in the axial direction of the reaction chamber 41. Finally, the third heat transfer medium can enter the reaction chamber 41 through the second through hole 43 and then flow out from the outlet 12. After the reaction, the second and third heat transfer media will change from dry and high temperature to low temperature and humid.

[0028] In the heat release process of the thermochemical reactor with porous fins 30, the low-temperature, moist heat transfer medium, after entering the main body 10, will be divided into three parts: The heat transfer medium in the first part enters from one end of the flow channel 21 and flows out from the other end. At the beginning of the heat release process, the heat storage material near the inner tube 20 has a low degree of reaction and therefore a low temperature, which is still at the first preset temperature. The shape memory structure 22 can increase the flow resistance of the low-temperature heat transfer medium in the inner tube 20, thereby prolonging the heat transfer time and allowing the heat transfer medium to absorb and carry away more heat. As the exothermic reaction in the reaction chamber 41 proceeds, the temperature of the outer wall of the inner tube 20 gradually increases, causing the temperature of the shape memory structure 22 to gradually increase and deform. After the temperature exceeds the second preset temperature, part of the shape memory structure 22 bends, reducing the obstruction to the heat transfer medium. This reduces the flow resistance of the heat transfer medium, increases the flow rate of the heat transfer medium, and enhances the convective heat transfer effect. This design can actively adjust the heat transfer process at different stages of the heat release process. At the beginning of the heat release, the heat storage material near the inner tube 20 has a low reaction degree, which can prolong the heat transfer time and reduce the amount of heat transfer medium used. As the reaction continues, the heat release of the heat storage material in the reaction chamber 41 increases. The deformation of the shape memory structure 22 increases the flow rate of the heat transfer medium, thereby enhancing convective heat transfer and quickly removing heat.

[0029] The heat transfer medium in the second part will enter the reaction chamber 41 from the first air inlet 11, and then undergo a hydration reaction with the heat storage material to release heat. The heat transfer medium in the adjacent reaction chambers 41 can flow to each other, thereby improving the flowability of the heat transfer medium in the radial direction and improving the flowability of the heat transfer medium in the radial direction of the reaction chamber 41. Some of the heat can be transferred to the porous fins 30, and then to the inner tube 20, and then quickly carried away by the heat transfer medium in the first part, thereby improving the heat transfer rate in the radial direction and improving the temperature uniformity of the reaction chamber 41. The third heat transfer medium will enter the annular outer cavity 42 and can enter various positions in the axial direction of the reaction chamber 41 through the second through hole 43, improving the flowability of the heat transfer medium in the axial direction of the reaction chamber 41. This allows the heat transfer medium to react at various positions in the reaction chamber 41, avoiding localized reactions. The heat generated by the reaction can be conducted to the axial side of the reaction chamber 41, improving the heat uniformity in the axial direction of the reaction chamber 41, and thus improving the temperature uniformity of the reaction chamber 41. Finally, the third heat transfer medium can enter the reaction chamber 41 through the second through hole 43 and then flow out from the outlet 12. After the reaction, the second and third heat transfer media will change from low temperature and moisture to dry and high temperature.

[0030] It should be noted that without the design of the porous enclosure 40, the heat transfer medium in the third part is not separated; only the heat transfer medium in the first and second parts is separated.

[0031] It should be noted that the first preset temperature and the second preset temperature are specifically determined based on the material used in the shape memory structure 22. Both the first preset temperature and the second preset temperature can be a temperature range or a specific temperature. The materials and principles for fabricating the shape memory structure 22 are well-known to those skilled in the art and will not be elaborated upon here.

[0032] The specific structure of the shape memory structure 22 can be designed according to actual needs. For example, in some optional embodiments, the shape memory structure 22 includes multiple shape memory baffles 221, which are arranged sequentially along the axial direction of the flow channel 21. When the shape memory baffles 221 are at a first preset temperature, they extend in the radial direction of the flow channel 21, thereby effectively blocking the flow of the heat transfer medium and reducing the flow rate of the heat transfer medium. When the shape memory baffles 221 are at a second preset temperature, they include a base 222 and a bent portion 223 connected to each other. The base 222 extends in the radial direction of the flow channel 21, and the bent portion 223 bends relative to the base 222 and extends toward the axial direction of the flow channel 21. The axially extending bent portion 223 can reduce the flow resistance to the heat transfer medium and help improve the flow rate of the heat transfer medium.

[0033] The layout of the shape memory baffles 221 can be designed according to actual needs. For example, in some optional embodiments, multiple shape memory baffles 221 are divided into multiple groups, each group including multiple shape memory baffles 221. The multiple groups of shape memory baffles 221 are arranged sequentially along the circumference of the flow channel 21, and the multiple shape memory baffles 221 in the same group are arranged sequentially along the axial direction of the flow channel 21. When the shape memory baffles 221 are at a second preset temperature, the curved portions 223 of the multiple groups of shape memory baffles 221 are equivalent to forming an unobstructed space for the flow of the heat transfer medium, which is beneficial for facilitating the rapid flow of the heat transfer medium. Of course, other suitable layouts of the shape memory baffles 221 can also be adopted, and this example is not limited to this one.

[0034] In some alternative embodiments, different groups of shape memory baffles 221 are staggered in the axial direction of the flow channel 21, thereby preventing the shape memory baffles 221 from excessively obstructing the flow of the heat transfer medium and causing blockage. This allows the heat transfer medium to pass smoothly through the flow channel 21. Moreover, because the shape memory baffles 221 are staggered, it effectively extends the flow path of the heat transfer medium within the flow channel 21. For example, in one embodiment, a flow gap is formed between adjacent shape memory baffles 221 in the same group. All the flow gaps can form a spirally extending flow path, allowing the heat transfer medium to flow along the extended spiral flow path, thereby extending the residence time of the heat transfer medium in the inner tube 20.

[0035] In some alternative embodiments, the thermochemical reactor with porous fins 30 further includes a plurality of radial partition plates 50 disposed between the inner tube 20 and the porous surrounding plate 40 and arranged around the inner tube 20, with the plurality of radial partition plates 50 arranged sequentially along the extension direction of the flow channel 21. Multiple radial partition plates 50 divide each reaction chamber 41 into multiple sub-chambers 411, which are arranged sequentially along the extension direction of the flow channel 21. Multiple vent holes 51 are provided on the radial partition plates 50, and adjacent sub-chambers 411 of the same reaction chamber 41 are connected through several vent holes 51. The multiple radial partition plates 50 divide the reaction chamber 41 into multiple sub-chambers 411, and each sub-chamber 411 is thinner in the axial direction of the flow channel 21, which facilitates the passage of the heat transfer medium and allows the heat storage material in each sub-chamber 411 to react fully with the heat transfer medium. Adjacent sub-chambers 411 of the same reaction chamber 41 are connected through several vent holes 51, while the sub-chambers 411 of adjacent reaction chambers 41 are connected through a first through hole 31. Therefore, the flow of the heat transfer medium between the various sub-chambers 411 is strong.

[0036] By increasing the number of perforated fins and radial partition plates 50, the width and thickness of the sub-chamber 411 can be reduced, thereby enhancing the flow of the heat transfer medium. The number of perforated fins and radial partition plates 50 can be designed according to actual needs, and is not limited to those shown in the figure.

[0037] In some alternative embodiments, multiple vent holes 51 are arranged sequentially around the inner tube 20, and adjacent sub-chambers 411 of the same reaction chamber 41 are connected through multiple vent holes 51, thereby further improving the flow of heat transfer medium between sub-chambers 411.

[0038] In some optional embodiments, multiple first air inlets 11 and multiple air outlets 12 are respectively provided at both ends of the cavity; the multiple first air inlets 11 are arranged in sequence around the flow channel 21; the multiple air outlets 12 are arranged in sequence around the flow channel 21, so that the heat transfer medium can enter each reaction chamber 41 evenly and improve the pressure uniformity inside the cavity.

[0039] Since the positions of the multiple first air inlets 11 are arranged over a wide range, in order to avoid uneven air pressure among the multiple first air inlets 11, in some optional embodiments, a pressure equalization chamber 13 is also provided in the main body 10. One end of the pressure equalization chamber 13 is provided with a second air inlet 14, and the other end of the pressure equalization chamber 13 is connected to the flow channel 21 and the multiple first air inlets 11. After the heat transfer medium enters the pressure equalization chamber 13 from the second air inlet 14, the pressure equalization chamber 13 can make the air pressure of the heat transfer medium enter each first air inlet 11 more evenly, thereby improving the uniformity of the pressure entering each first air inlet 11.

[0040] In some alternative embodiments, the inner diameter of the equalizing chamber 13 gradually increases from the second air inlet 14 to the flow channel 21, thereby guiding the heat transfer medium to flow to each of the first air inlets 11.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-channel thermo-chemical reactor based on shape memory structures, characterized in that, The utility model relates to a heat storage device, comprising: a main body, the inside of the main body forms a cavity, the two ends of the cavity are respectively provided with a plurality of first air inlets and a plurality of air outlets; an inner tube is arranged in the cavity, the inside of the inner tube forms a flow channel, the flow channel extends in the direction from the first air inlet to the air outlet, a shape memory structure is arranged in the flow channel; a plurality of porous fins are arranged around the inner tube in sequence, a plurality of first through holes are arranged on the porous fins, a plurality of reaction chambers for accommodating heat storage materials are formed between the inner wall of the cavity, the inner tube and the plurality of porous fins, the plurality of reaction chambers are arranged around the inner tube in sequence, adjacent reaction chambers are communicated through the first through holes, and the two ends of the reaction chamber are respectively communicated with the first air inlet and the air outlet; wherein, when the shape memory structure is at a first preset temperature, the shape memory structure extends in the radial direction of the flow channel, and when the shape memory structure is at a second preset temperature, part of the shape memory structure is bent and extends towards the axial direction of the flow channel, wherein the first preset temperature is lower than the second preset temperature.

2. A multi-channel thermal chemical reactor based on shape memory structures according to claim 1, characterized in that: The shape memory structure comprises a plurality of shape memory baffles arranged in the axial direction of the flow channel; when the shape memory baffle is at a first preset temperature, the shape memory baffle extends in the radial direction of the flow channel, and when the shape memory baffle is at a second preset temperature, the shape memory baffle comprises a base and a bent portion connected to each other, the base extends in the radial direction of the flow channel, and the bent portion is bent relative to the base and extends towards the axial direction of the flow channel.

3. A multi-channel thermal chemical reactor based on shape memory structures according to claim 2, characterized in that: The plurality of shape memory baffles are divided into a plurality of groups, each group comprising a plurality of shape memory baffles, the plurality of groups of shape memory baffles are arranged in sequence along the circumferential direction of the flow channel, and the plurality of shape memory baffles in the same group are arranged in sequence along the axial direction of the flow channel.

4. A multi-channel thermal chemical reactor based on shape memory structures according to claim 3, characterized in that: The shape memory baffles of different groups are staggered in the axial direction of the flow channel.

5. A multi-channel thermal chemical reactor based on shape memory structures according to claim 1, characterized in that Further comprising a porous enclosure; the porous enclosure is arranged around the plurality of porous fins, and the plurality of reaction chambers are formed between the inner side of the porous enclosure, the inner tube and the plurality of porous fins; an annular outer cavity is formed between the outer side of the porous enclosure and the inner wall of the cavity, a plurality of second through holes are arranged on the porous enclosure, and the annular outer cavity is communicated with the reaction chambers through the second through holes.

6. A multi-channel thermal chemical reactor based on shape memory structures according to any one of claims 1 to 5, characterized in that, Further comprising a plurality of radial partition plates arranged between the inner tube and the porous enclosure and around the inner tube, and arranged in sequence along the extension direction of the flow channel; the plurality of radial partition plates divide each reaction chamber into a plurality of sub-chambers, the plurality of sub-chambers are arranged in sequence along the extension direction of the flow channel, a plurality of air holes are arranged on the radial partition plates, and adjacent sub-chambers of the same reaction chamber are communicated through a plurality of air holes.

7. A multi-channel thermal chemical reactor based on shape memory structures according to claim 6, characterized in that: A plurality of the air holes are arranged in sequence around the inner tube, and adjacent sub-chambers of the same reaction chamber are communicated through a plurality of the air holes.

8. A shape memory structure based multi-channel thermo-chemical reactor according to any one of claims 1 to 5, characterized in that: Both ends of the cavity are respectively provided with a plurality of the first air inlets and a plurality of the air outlets. A plurality of the first air inlets are arranged in sequence around the flow channel. A plurality of the air outlets are arranged in sequence around the flow channel.

9. A shape memory structure based multi-channel thermo-chemical reactor according to any one of claims 1 to 5, characterized in that: The main body is further provided with an equalizing cavity, one end of the equalizing cavity is provided with a second air inlet, and the other end of the equalizing cavity is communicated with the flow channel and a plurality of the first air inlets.

10. A multi-channel thermal chemical reactor based on shape memory structures according to claim 9, characterized in that: The inner diameter of the equalizing cavity gradually increases in the direction from the second air inlet to the flow channel.

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