Corrugated surface phase change energy storage ball based on composite heat storage material

Abstract

The invention discloses a corrugated surface phase change energy storage ball based on a composite heat storage material, which effectively increases the overall heat exchange efficiency of the device, and comprises a shell, the upper side of the shell is provided with a material inlet, the lower side of the material inlet is provided with a connecting sleeve, the upper part of the connecting sleeve is provided with a sealing cover, and the sealing cover is internally provided with a fixing mechanism; the shell comprises a plurality of convex parts and concave parts which are alternately arranged, supporting mechanisms used for supporting the convex parts are arranged on the inner side walls of the convex parts, a heat dissipation assembly connected with the shell is arranged in each supporting mechanism, and a stirring assembly is arranged in the shell; the heat storage material filling device has the advantages that the heat storage material filling device is novel in structure, ingenious in conception and simple and convenient to operate, heat storage materials can be effectively and conveniently filled, the integral sealing performance of the heat storage material filling device is improved, the integral stability of the heat storage material filling device is improved, and the service life of the heat storage material filling device is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage heat exchange, and relates to a corrugated surface phase change energy storage sphere based on a composite heat storage material. Background Art

[0002] At present, phase change materials play a crucial role in promoting new energy development and improving energy utilization efficiency. As an efficient thermal energy storage technology, the phase change energy storage sphere provides more choices for the energy storage and utilization system. Utilizing the property that substances absorb or release a large amount of thermal energy during the phase change process, it has been applied in many fields and has broad application prospects.

[0003] Although the phase change energy storage sphere technology shows its advantages in multiple fields, the current applications still face some technical and cost challenges. Traditional phase change spheres have problems of low thermal conduction efficiency in thermal management and energy storage; while defects such as easy leakage, low thermal conductivity, and weak light absorption of single organic phase change materials hinder their wider application and development; the high cost of phase change materials is still an important factor restricting their wider application. Therefore, a corrugated surface phase change energy storage sphere capable of improving the thermal conduction efficiency is needed to solve the above problems. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a corrugated surface phase change energy storage sphere based on a composite heat storage material, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A corrugated surface phase change energy storage sphere based on a composite heat storage material, comprising a housing. An inlet is provided on the upper side of the housing. A connecting sleeve for injecting the heat storage material into the interior of the housing is provided below the inlet. A sealing cover is detachably connected to the upper part of the connecting sleeve. A fixing mechanism for rotationally limiting the sealing cover is provided inside the sealing cover.

[0007] The housing includes a plurality of alternately arranged convex portions and concave portions. A support mechanism for supporting the convex portion is provided on the inner side wall of the convex portion. A heat dissipation component connected to the housing is provided inside each support mechanism. A plurality of stirring components for stirring the heat storage material are provided inside the housing. Both ends of each stirring component are connected to the inner wall of the concave portion.

[0008] Preferably, a through hole is provided on the inner bottom wall of the connecting sleeve. An annular sealing gasket is detachably connected to the inner bottom wall of the connecting sleeve. The upper side of the annular sealing gasket abuts against the bottom of the sealing cover. The outer side wall of the sealing cover is detachably connected to the inner side wall of the connecting sleeve by a thread.

[0009] Preferably, the fixing mechanism includes a countersunk hole and a fixing bolt. The fixing bolt is threadedly connected to the inner side wall of the countersunk hole, and the lower part of the fixing bolt passes through the countersunk hole and abuts against the inner side wall of the connecting sleeve.

[0010] Preferably, the supporting mechanism includes a fixing ring and a connecting layer. The connecting layer is fixedly connected to the inside of the convex portion, and the fixing ring is arranged between the convex portion and the connecting layer.

[0011] Preferably, the heat dissipation assembly includes a plurality of heat dissipation rods arranged in a circumferential array, and both ends of each heat dissipation rod are fixedly connected to the connecting layer.

[0012] Preferably, each stirring assembly includes a rotatable rotating rod and two power sleeves. The front and rear sides of the power rod are respectively rotatably connected to the corresponding power sleeves. One side of each power sleeve away from the power rod is connected to the concave portion. The two power sleeves are away from each other to form a structure in which the power sleeves can rotate. The outer side of the power rod is fixedly connected with a first stirring assembly and a second stirring assembly.

[0013] Preferably, two first connecting rings are fixedly connected to the inner side wall of the concave portion, and a second connecting ring adapted to the corresponding first connecting ring is provided on one side of each power sleeve away from the power rod.

[0014] Preferably, a transmission sleeve is fixedly connected to the inner side wall of the power sleeve. Two power grooves are formed in the side wall of the transmission sleeve, and a power block is slidably connected to the inside of each power groove. Each power block is fixedly connected to the power rod.

[0015] Preferably, a sealing ring is provided on one side of each power sleeve close to the power rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention has alternately arranged convex portions and concave portions. By providing the concave portions and the convex portions, the contact area between the heat storage material and the fluid medium can be effectively increased, thereby increasing the heat exchange efficiency.

[0018] 2. The present invention has a connecting sleeve and a sealing cover. The connecting sleeve and the through hole together form a structure similar to a funnel. When filling the heat storage material, the leakage of the heat storage material into and out of the feeding port can be effectively reduced. After the filling is completed, the whole device can also be sealed through the cooperation between the connecting sleeve and the sealing cover.

[0019] 3. The present invention has a supporting mechanism and a heat dissipation assembly, which can not only ensure the spherical structure design of the whole shell through the supporting mechanism, but also improve the heat exchange efficiency of the shell for the internal heat storage material through the heat dissipation assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is an exploded schematic diagram of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the housing in the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the drive sleeve in the present invention.

[0024] In the figure: 1. Housing; 2. Feed inlet; 3. Connecting sleeve; 4. Sealing cover; 5. Fixing mechanism; 6. Protrusion; 7. Depression; 8. Support mechanism; 10. Stirring assembly; 11. Through hole; 12. Annular gasket; 13. Countersunk hole; 14. Fixing bolt; 15. Fixing ring; 16. Connecting layer; 17. Heat dissipation rod; 18. Rotating rod; 19. Power sleeve; 20. First stirring assembly; 21. Second stirring assembly; 22. First connecting ring; 23. Second connecting ring; 24. Drive sleeve; 25. Power groove; 26. Power block; 27. Sealing ring. DETAILED DESCRIPTION OF THE INVENTION

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Next, in conjunction with the attached Figures 1 to 4 A further detailed description will be made of the specific implementation manners of the present invention.

[0027] As Figures 1 to 4 shown, the present invention includes a housing 1. In order to increase the overall heat exchange efficiency of the device, a feed inlet 2 is provided on the upper side of the housing 1. A connecting sleeve 3 for injecting heat storage material into the interior of the housing 1 is provided below the feed inlet 2. A sealing cover 4 is detachably connected to the upper part of the connecting sleeve 3. A fixing mechanism 5 for rotationally limiting the sealing cover 4 is provided inside the sealing cover 4;

[0028] The outer shell 1 includes a plurality of alternately arranged convex portions 6 and concave portions 7. The inner side wall of the convex portion 6 is provided with a support mechanism 8 for supporting the convex portion 6. A heat dissipation component connected to the outer shell 1 is provided inside each support mechanism 8. A plurality of stirring components 10 for stirring the heat storage material are provided inside the outer shell 1. Both ends of each stirring component 10 are connected to the inner wall of the concave portion 7;

[0029] It should be noted that the heat storage material is a phase change energy storage material, which is composed of one or more composites of paraffin-graphene composite material, sodium acetate trihydrate, lauric acid, and composite phase change materials. In this embodiment, the composite phase change material is used. The preparation process of the composite phase change heat storage material is as follows: Pretreat the grease and oil sludge generated during oilfield exploitation, separate the organic and inorganic substances in the grease and oil sludge, put them into a high-temperature reaction kettle for anaerobic high-temperature pyrolysis treatment to obtain a pyrolysis product, a carbon-based material. Cool and lower the temperature of the obtained material, and dry it to form a precursor of the heat storage material, and then combine it with the paraffin phase change material to obtain the composite phase change heat storage material;

[0030] In this embodiment, the outer shell 1 is made of a material with strong corrosion resistance, good thermal conductivity, and certain deformation ability, such as aluminum-magnesium alloy (5052, 5083), copper-nickel alloy (90 / 10Cu-Ni, 70 / 30Cu-Ni), titanium alloy (Gr.2 pure titanium, Gr.5Ti-6A1-4V), nickel-aluminum bronze (C95800), etc. The specific material can be selected according to cost and actual heat exchange requirements, and will not be elaborated here;

[0031] During use, the heat storage material can be injected into the interior of the housing 1 through the connecting sleeve 3 below the feeding port 2. After the sealing cover 4 is fitted with the connecting sleeve 3, the rotation of the sealing cover 4 relative to the connecting sleeve 3 is limited by the fixing mechanism 5, and then the sealing cover 4 and the connecting sleeve 3 can be fixed by welding, thus completing the filling of the heat storage material. When the device is in use, the whole device can be placed in a fluid medium. The housing 1 is used to connect the heat storage material and the fluid medium and conduct heat between the heat storage material and the fluid medium. By providing the concave portion 7 and the convex portion 6, the contact area between the heat storage material and the fluid medium can be effectively increased, thereby increasing the heat exchange efficiency. When the fluid medium is a high-temperature fluid, heat exchange is carried out between the fluid medium and the heat storage material through the housing 1. At this time, the heat storage material will undergo a certain degree of phase change, that is, part of the solid substance will change into a liquid under the action of temperature, and the density will also change during this period (the density decreases during the endothermic process). Therefore, during the endothermic process of the heat storage material, its volume will increase, thereby increasing the pressure inside the housing 1. At this time, the housing 1 will undergo a certain deformation. Under the action of the support mechanism 8, the deformation amount of the convex portion 6 is smaller. Therefore, the concave portion 7 will expand outwards, thereby driving the stirring assembly 10 to operate and stirring the heat storage material inside the housing 1 to make the temperatures of the heat storage materials at different positions more uniform, and the heat storage operation is carried out through the heat storage material. When the fluid medium is a low-temperature fluid, at this time, the heat storage material releases heat externally, and the liquid substance will change into a solid. During this process, the density increases, causing a certain negative pressure inside the housing 1, thereby causing the concave portion 7 to contract inwards, and similarly driving the stirring assembly 10 to operate and stirring the heat storage material inside the housing 1.

[0032] Further, as Figures 1 to 4 shown, in order to facilitate the filling of the heat storage material, a through hole 11 is formed in the inner bottom wall of the connecting sleeve 3. The inner bottom wall of the connecting sleeve 3 is detachably connected with an annular sealing gasket 12. The upper side of the annular sealing gasket 12 abuts against the bottom of the sealing cover 4. The outer side wall of the sealing cover 4 is detachably connected with the inner side wall of the connecting sleeve 3 by threads;

[0033] Further, as Figures 1 to 4 shown, in order to increase the overall sealing performance of the device, the fixing mechanism 5 includes a countersunk hole 13 and a fixing bolt 14. The fixing bolt 14 is threadedly connected with the inner side wall of the countersunk hole 13. The lower part of the fixing bolt 14 passes through the countersunk hole 13 and abuts against the inner side wall of the connecting sleeve 3;

[0034] During use, the connecting sleeve 3 and the through hole 11 together form a funnel-like structure, which can effectively reduce the leakage of the heat storage material into and out of the feeding port 2 when filling the heat storage material. After the heat storage material is filled, the sealing cover 4 can be threadedly connected and fixed to the connecting sleeve 3. At this time, the bottom of the sealing cover 4 abuts against the annular sealing gasket 12 to seal the through hole 11. Then, the fixing bolt 14 can be fitted with the countersunk hole 13. After the fixing bolt 14 is tightened, the bottom of the fixing bolt 14 abuts against the inner side wall of the connecting sleeve 3, and the rotational limit between the connecting sleeve 3 and the sealing cover 4 is achieved through the frictional force between the bottom of the fixing bolt 14 and the connecting sleeve 3.

[0035] Further, as Figures 1 to 4 shown, in order to increase the overall stability of the device, the support mechanism 8 includes a fixing ring 15 and a connecting layer 16. The connecting layer 16 is fixedly connected to the inside of the convex portion 6, and the fixing ring 15 is arranged between the convex portion 6 and the connecting layer 16; the heat dissipation assembly includes a plurality of heat dissipation rods 17 arranged in a circumferential array. The heat dissipation rods 17 are hollow sleeve structures made of a metal with good thermal conductivity, and both ends of each heat dissipation rod 17 are fixedly connected to the connecting layer 16;

[0036] It should be noted that the connecting layer 16 and the housing 1 are made of the same material and have good temperature conduction ability. The fixing ring 15 is made of a metal with a relatively large tensile strength. When the housing 1 deforms, the convex portion 6 can be limited by the fixing ring 15, so that the convex portion 6 will not produce excessive deformation, ensuring the overall spherical structure of the housing 1; when the device stores energy and exchanges heat, the heat of the housing 1 and the connecting layer 16 can be introduced into the inside of the housing 1 through the heat dissipation rods 17, thereby increasing the temperature consistency of the heat exchange material inside the housing 1.

[0037] Further, as Figures 1 to 4 shown, in order to increase the overall heat exchange efficiency of the device, each stirring assembly 10 includes a rotatable rotating rod 18 and two power sleeves 19. The front and rear sides of the power rod are respectively rotatably connected to the corresponding power sleeves 19. One side of each power sleeve 19 away from the power rod is connected to the concave portion 7. The two power sleeves 19 are separated from each other to form a structure in which the power sleeves 19 can rotate. The outside of the power rod is fixedly connected with a first stirring assembly 20 and a second stirring assembly 21; two first connecting rings 22 are fixedly connected to the inner side wall of the concave portion 7, and each power sleeve 19 away from the power rod is provided with a second connecting ring 23 adapted to the corresponding first connecting ring 22; a transmission sleeve 24 is fixedly connected to the inner side wall of the power sleeve 19, and two power grooves 25 are opened on the side wall of the transmission sleeve 24. A power block 26 is slidably connected to the inside of each power groove 25, and each power block 26 is fixedly connected to the power rod;

[0038] It should be noted that the first stirring assembly 20 and the second stirring assembly 21 can be made of one or a combination of a screw structure or a rod-like structure. In this embodiment, the screw structure (i.e., the spiral blade structure) is used. When the screw rotates with the power rod, it can stir the heat storage material around the power rod, thereby increasing the uniformity of the heat storage material at different positions inside the housing 1. In addition, in practice, the staff can also replace the screw with a stirring rod of a rod-like structure according to needs, that is, weld a plurality of stirring rods perpendicular to the axis of the power rod on the outside of the power rod. The plurality of stirring rods together form the first stirring assembly 20 and the second stirring assembly 21, and stir the heat storage material around the power rod under the drive of the power rod.

[0039] During use, with the change of temperature, the recessed part 7 will expand outwards, thereby driving the stirring assembly 10 to operate. When the stirring assembly 10 operates, the two power sleeves 19 will approach or move away from each other under the left and right of the first connecting ring 22 and the second connecting ring 23. During the process of their moving away from each other, since there is no relative rotation between the first connecting ring 22 and the second connecting ring 23, the transmission sleeves 24 inside the two power sleeves 19 will move relative to the power rod. Then, under the action of each power groove 25, each power block 26 moves relative to the power groove 25, causing the power rod to rotate. Then, under the action of the first stirring assembly 20 and the second stirring assembly 21, the heat storage material around the power rod is stirred, improving the uniformity of the temperature at different positions inside the housing 1, and thereby increasing the overall heat exchange efficiency of the device.

[0040] Furthermore, as Figures 1 to 4 shown, in order to increase the service life of the device, a sealing ring 27 is provided on one side of each of the power sleeves 19 close to the power rod.

[0041] It should be noted that the sealing ring 27 is made of a shock absorber oil seal structure, such as the DCY type shock absorber oil seal NBR, which is a common vulnerable part and can be replaced. There is no need to elaborate here. It can reduce the erosion of the heat storage material on the inside of the power sleeve 19 when the power sleeve 19 slides relative to the power rod, thereby increasing the service life of the device.

[0042] When the present invention is in use, first, a heat storage material can be injected into the interior of the outer shell 1 through the connecting sleeve 3 below the feeding port 2. After the sealing cover 4 is fitted with the connecting sleeve 3, the rotation of the sealing cover 4 relative to the connecting sleeve 3 is limited by the fixing mechanism 5, and then the sealing cover 4 and the connecting sleeve 3 can be fixed by welding, thus completing the filling of the heat storage material. When the device is in use, the whole device can be placed in a fluid medium. The outer shell 1 is used to connect the heat storage material and the fluid medium and conduct heat between the heat storage material and the fluid medium. By providing the concave portion 7 and the convex portion 6, the contact area between the heat storage material and the fluid medium can be effectively increased, thereby increasing the heat exchange efficiency. When the fluid medium is a high-temperature fluid, heat exchange is carried out between the fluid medium and the heat storage material through the outer shell 1. At this time, the heat storage material will undergo a certain degree of phase change, that is, part of the solid substance will change into a liquid under the action of temperature, and the density will also change during this period (the density decreases during the endothermic process). Therefore, during the endothermic process of the heat storage material, its volume will increase, thereby increasing the pressure inside the outer shell 1. At this time, the outer shell 1 will undergo a certain deformation. Under the action of the support mechanism 8, the deformation amount of the convex portion 6 is smaller. Therefore, the concave portion 7 will expand outwards, thereby driving the stirring assembly 10 to operate and stirring the heat storage material inside the outer shell 1 to make the temperatures of the heat storage materials at different positions more uniform, and the heat storage operation is carried out through the heat storage material. When the fluid medium is a low-temperature fluid, at this time, the heat storage material releases heat to the outside, and the liquid substance will change into a solid. During this process, the density increases, causing a certain negative pressure inside the outer shell 1, and then causing the concave portion 7 to contract inwards, and similarly driving the stirring assembly 10 to operate and stirring the heat storage material inside the outer shell 1.

[0043] The structure of the present invention is novel, ingeniously conceived, and simple and convenient to operate. Through this design, the heat exchange efficiency of the whole device is effectively increased, the filling of the heat storage material is facilitated, the sealing performance of the whole device is increased, the stability of the whole device is increased, and the service life of the device is increased.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A corrugated surface phase change energy storage ball based on a composite heat storage material, comprising a shell, characterized in that: An inlet is provided on the upper side of the shell, and a connecting sleeve for injecting heat storage material into the shell is provided on the lower side of the inlet. A sealing cover is detachably connected to the upper part of the connecting sleeve, and a fixing mechanism for rotationally limiting the sealing cover is provided inside the sealing cover; The shell includes a plurality of alternately arranged protrusions and recessed portions, the inner side wall of the protrusion is provided with a supporting mechanism for supporting the protrusion, each of the supporting mechanisms is provided with a heat dissipation component connected to the shell, and the shell is provided with a plurality of stirring components for stirring the heat storage material, and both ends of each stirring component are connected to the inner wall of the recessed portion.

2. According to claim 1, a corrugated surface phase change energy storage ball based on a composite heat storage material is characterized by: A through hole is provided on the inner bottom wall of the connecting sleeve, and an annular sealing gasket is detachably connected to the inner bottom wall of the connecting sleeve. The upper side of the annular sealing gasket abuts against the bottom of the sealing cover, and the outer side wall of the sealing cover is detachably connected to the inner side wall of the connecting sleeve via threads.

3. According to claim 1, a corrugated surface phase change energy storage ball based on a composite heat storage material is characterized by: The fixing mechanism comprises a countersunk hole and a fixing bolt, wherein the fixing bolt is threadedly connected to the inner side wall of the countersunk hole, and the lower part of the fixing bolt passes through the countersunk hole and abuts against the inner side wall of the connecting sleeve.

4. According to claim 1, a corrugated surface phase change energy storage ball based on a composite heat storage material is characterized by: The supporting mechanism comprises a fixing ring and a connecting layer, wherein the connecting layer is fixedly connected to the inner side of the protruding portion, and the fixing ring is arranged between the protruding portion and the connecting layer.

5. The corrugated surface phase change energy storage ball based on composite heat storage material according to claim 4, characterized in that: The heat dissipation assembly comprises a plurality of heat dissipation rods arranged in a circumferential array, and both ends of each heat dissipation rod are fixedly connected to the connection layer.

6. The corrugated surface phase change energy storage ball based on composite heat storage material according to claim 1, characterized in that: Each of the stirring components includes a rotatable rotating rod and two power sleeves. The front and rear sides of the power rod are respectively rotatably connected to the corresponding power sleeves. The side of each power sleeve away from the power rod is connected to the recessed portion. The two power sleeves are away from each other to form a rotatable power sleeve structure. The outer side of the power rod is fixedly connected to the first stirring component and the second stirring component.

7. The corrugated surface phase change energy storage ball based on composite heat storage material according to claim 6, characterized in that: Two first connecting rings are fixedly connected to the inner side wall of the recessed portion, and a second connecting ring matched with the corresponding first connecting ring is provided on a side of each power sleeve away from the power rod.

8. The corrugated surface phase change energy storage ball based on composite heat storage material according to claim 6, characterized in that: The inner side wall of the power sleeve is fixedly connected with a transmission sleeve, and the side wall of the transmission sleeve is provided with two power grooves, and a power block is slidably connected inside each power groove, and each power block is fixedly connected with the power rod.

9. The corrugated surface phase change energy storage ball based on composite heat storage material according to claim 6, characterized in that: A sealing ring is provided on one side of each power sleeve close to the power rod.

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