CN111205826A - Multi-sphere coupling phase change heat storage material structure simulating alveolus layout and heat storage tank - Google Patents
Multi-sphere coupling phase change heat storage material structure simulating alveolus layout and heat storage tank Download PDFInfo
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- CN111205826A CN111205826A CN202010017658.9A CN202010017658A CN111205826A CN 111205826 A CN111205826 A CN 111205826A CN 202010017658 A CN202010017658 A CN 202010017658A CN 111205826 A CN111205826 A CN 111205826A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
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Abstract
A multi-sphere coupling phase change heat storage material structure and a heat storage tank with bionic alveolar layout belong to the technical field of phase change heat storage. The problem of current traditional phase change heat-retaining material of single sphere shape have heat transfer rate and heat-retaining density lower, be difficult to satisfy high heat transfer rate and high heat-retaining density demand is solved. The technical points are as follows: the structure is provided with a plurality of phase change heat storage balls, and the phase change heat storage balls form an alveolar heat storage ball model through bionic coupling of different alveolar numbers; when the number of the phase change heat storage balls is three, a bionic tri-alveolar heat storage ball model is formed; when the number of the phase change heat storage spheres is four, simulating a four-alveolus heat storage sphere model; when the number of the phase-change heat storage balls is five, a five-alveolus heat storage ball model is simulated. The heat storage tank comprises a tank body and a multi-ball coupling phase change heat storage material filled into the tank body and in a bionic alveolus layout. The invention improves the shape of the phase-change heat storage material through the bionic alveolus arrangement, improves the heat storage rate and the heat storage density of the heat storage system, and has wide application prospect.
Description
Technical Field
The invention relates to a phase change heat storage material structure and a heat storage tank, in particular to a multi-sphere coupling phase change heat storage material structure and a heat storage tank with bionic alveolar layout, and belongs to the technical field of phase change heat storage.
Background
With the gradual consumption of fossil energy, the energy crisis is getting more and more serious, and the utilization efficiency of energy grading is improved by utilizing heat storage, so that the method is an important way for relieving the problem of energy shortage. The heat storage is classified into phase change heat storage and non-phase change heat storage according to whether phase change occurs. The phase change heat storage is to utilize the phenomenon that a large amount of energy is absorbed or released by a substance in the phase change process and combine a heat exchanger to achieve the purpose of storing and utilizing the energy. Compared with sensible heat storage, the phase-change heat storage technology has the characteristics of light weight and small volume, can continuously supply heat, and ensures constant output temperature or small fluctuation. Latent heat storage based on Phase Change Materials (PCM) has the advantages of large heat storage density (the heat storage performance is more than 5-10 times of that of a sensible heat storage technology), compact structure and the like, and has better development prospects in the fields of aerospace, power peak load shifting, air conditioning and heating, industrial waste heat recovery and the like, wherein the problem to be solved urgently is to further improve the phase change heat storage rate and the heat storage density.
The packed bed phase-change heat storage system is relatively mature and simple heat storage and exchange equipment in the phase-change heat storage technology, and more researches on the phase-change heat storage performance of the packed bed phase-change heat storage system appear in recent years. For the heat storage process of the phase change heat storage mainly based on heat conduction and the combined action of heat conduction and natural convection, the influence of high-temperature radiation heat exchange, heat conduction and natural convection coupling on the heat storage performance of the sphere is large, and the influence laws of different heat transfer fluid temperatures, sphere diameters, shapes and the like on the heat storage performance are different. The reasonable diameter and shape of the heat storage material are key factors for improving the heat storage rate and the heat storage density.
At present, in the heat exchange process of a heat storage system, the traditional phase change heat storage material is randomly arranged in a single ball, and the heat exchange effect is poor. In order to improve the heat storage effect, a large-volume heat storage tank is designed, so that the weight is too large, and the high-efficiency heat exchange requirements of high-end equipment in the aerospace field at the present stage cannot be met.
Disclosure of Invention
The invention aims to provide a multi-sphere coupling phase change heat storage material structure with a bionic alveolar layout and a heat storage tank, and aims to solve the problems that a traditional single-sphere-shaped phase change heat storage material is low in heat exchange rate and heat storage density and difficult to meet the requirements for high heat exchange rate and high heat storage density. According to the invention, the shape of the phase-change heat storage material is improved through the structural arrangement of the bionic organism lung cells, a brand-new heat storage material structure is designed, the heat storage rate and the heat storage density of the heat storage system are improved through optimizing the shape of the heat storage material, and the bionic organism lung cell heat storage system has a wide application prospect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first scheme is as follows: a multi-sphere coupling phase change heat storage material structure with bionic alveolar layout is provided with a plurality of phase change heat storage spheres, wherein the phase change heat storage spheres form an alveolar heat storage sphere model through bionic coupling of different alveolar numbers; when the number of the phase change heat storage balls is three, a bionic tri-alveolar heat storage ball model is formed; when the number of the phase change heat storage spheres is four, simulating a four-alveolus heat storage sphere model; when the number of the phase-change heat storage balls is five, a five-alveolus heat storage ball model is simulated.
Further: the sphere centers of all the phase change heat storage spheres in the bionic tri-alveolar heat storage sphere model are connected to form an equilateral triangle.
Further: the sphere centers of each phase change heat storage sphere in the bionic four-alveolus heat storage sphere model are connected to form an equal tetrahedron.
Further: the sphere centers of all phase change heat storage spheres in the bionic five-alveolus heat storage sphere model are connected to form a hexahedron.
Further: the phase-change heat storage ball comprises a shell, solid molten salt and liquid molten salt from outside to inside, and a pasty area is formed at the joint of the solid molten salt and the liquid molten salt.
Scheme II: the heat storage tank comprises a tank body and a scheme I, wherein the multi-sphere coupling phase change heat storage material with the bionic alveolar layout is filled in the tank body.
The invention achieves the following effects:
compared with a single-sphere model, the bionic multi-alveolus heat storage sphere model has the advantages that when the bionic multi-alveolus heat storage sphere model has the same volume, the bionic multi-alveolus heat storage sphere model has a larger surface area, the heat exchange efficiency and the heat exchange density can be improved, the heat storage performance of the heat storage unit is improved, and the application prospect is wide.
Drawings
FIG. 1 is a structural model diagram of a bionic alveolar layout of a multi-sphere coupled phase-change heat storage material (a three-alveolar heat storage sphere model);
FIG. 2 is a structural model diagram of a bionic alveolar layout of a multi-sphere coupled phase-change heat storage material (a four-alveolar heat storage sphere model);
FIG. 3 is a structural model diagram of a bionic alveolus layout multi-sphere coupling phase change heat storage material (five alveolus heat storage sphere model)
FIG. 4 is a front view of FIG. 1;
FIG. 5 is a front view of FIG. 2;
FIG. 6 is a front view of FIG. 3;
FIG. 7 is a view showing the internal structure of the phase change heat storage ball;
FIG. 8 is a structural diagram of a heat storage tank with bionic alveolar layout and multi-sphere coupling phase change heat storage material (three-alveolar heat storage sphere model);
FIG. 9 is a structural diagram of a heat storage tank with bionic alveolar layout and multi-sphere coupling phase change heat storage material (four-alveolar heat storage sphere model);
fig. 10 is a structural diagram of a heat storage tank with a bionic alveolar layout and a multi-sphere coupling phase change heat storage material (a five-alveolar heat storage sphere model).
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "inner", "middle", "outer", "front", rear ", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "connected," and "fixed" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying fig. 1 in conjunction with an embodiment. Fig. 1 is a schematic structural diagram of a multi-sphere coupled phase-change heat storage material structure and a heat storage tank with a bionic alveolar layout.
Preferred embodiments of the present invention are explained in detail below with reference to the accompanying drawings.
Example 1: as shown in fig. 1, 4 and 7, the multi-sphere coupling phase-change heat storage material structure with a bionic alveolar layout in the present embodiment includes three phase-change heat storage spheres, and the three phase-change heat storage spheres form an alveolar heat storage sphere model by coupling the number of bionic alveoli to form a bionic tri-alveolar heat storage sphere model; the sphere centers of all the phase change heat storage spheres in the bionic tri-alveolar heat storage sphere model are connected to form an equilateral triangle. The phase-change heat storage ball comprises a shell 1, solid molten salt 2 and liquid molten salt 4 from outside to inside, and a pasty area 3 is formed at the joint of the solid molten salt 2 and the liquid molten salt 4.
Example 2: as shown in fig. 2, fig. 5 and fig. 7, the multi-sphere coupling phase change heat storage material structure with a bionic alveolar layout according to the present embodiment includes four phase change heat storage spheres, and the four phase change heat storage spheres form an alveolar heat storage sphere model by coupling the number of bionic alveoli to form a bionic four-alveolar heat storage sphere model; the sphere centers of each phase change heat storage sphere in the bionic four-alveolus heat storage sphere model are connected to form an equal tetrahedron. The phase-change heat storage ball comprises a shell 1, solid molten salt 2 and liquid molten salt 4 from outside to inside, and a pasty area 3 is formed at the joint of the solid molten salt 2 and the liquid molten salt 4.
Example 3: as shown in fig. 3, fig. 6 and fig. 7, the multi-sphere coupling phase change heat storage material structure with a bionic alveolar layout according to the present embodiment has five phase change heat storage spheres, and the five phase change heat storage spheres form an alveolar heat storage sphere model by coupling the number of bionic alveoli to form a bionic five-alveolar heat storage sphere model; the sphere centers of all phase change heat storage spheres in the bionic five-alveolus heat storage sphere model are connected to form a hexahedron. The phase-change heat storage ball comprises a shell 1, solid molten salt 2 and liquid molten salt 4 from outside to inside, and a pasty area 3 is formed at the joint of the solid molten salt 2 and the liquid molten salt 4.
Example 4: as shown in fig. 1, fig. 4 and fig. 8, the heat storage tank with the bionic alveolar layout and the multi-sphere coupled phase change heat storage material in the embodiment includes a tank body and the multi-sphere coupled phase change heat storage material in the bionic alveolar layout in the embodiment 1, and the tank body is filled with the multi-sphere coupled phase change heat storage material in the bionic alveolar layout.
Example 5: as shown in fig. 2, fig. 5 and fig. 9, the heat storage tank of the multi-sphere coupling phase change heat storage material with the bionic alveolar layout in this embodiment includes a tank body and the multi-sphere coupling phase change heat storage material with the bionic alveolar layout in embodiment 2, and the tank body is filled with the multi-sphere coupling phase change heat storage material with the bionic alveolar layout.
Example 6: as shown in fig. 3, fig. 6 and fig. 10, the heat storage tank of the multi-sphere coupling phase change heat storage material with the bionic alveolar layout in this embodiment includes a tank body and the multi-sphere coupling phase change heat storage material with the bionic alveolar layout in embodiment 3, and the tank body is filled with the multi-sphere coupling phase change heat storage material with the bionic alveolar layout.
In examples 1 to 6, the shell part of the phase-change heat storage sphere is supported and fixed by the contact region by using a multi-sphere coupling model with reference to the structural arrangement of the lung cells of the living body. The phase-change heat storage ball structure is suitable for heat storage utilization of each temperature zone, can form a larger specific surface area, accelerates fluid flow, and increases heat exchange rate and heat exchange quantity.
The principle analysis of the specific surface area increase is as follows:
suppose that the object I consists of a single sphere with a radius R1. The object II consists of three intersecting spheres, each of which has a radius R3. Assuming that object I and object II are equal in volume, R1And R3And the surface areas of the object I and the object II have the following relationship.
The volume of the object I is
V1＝4πR1 3/3 (1)
Supposing that the connecting line of the centers of three crossed balls forms an equilateral triangle, the crossed part of the ball is a segment, and the height of the segment can be obtained by mathematical relationship
The volume of the object II is
According to the equal volume of the two objects, the relationship between the radiuses is obtained as follows
R3＝0.6994R1(4)
Known spherical cap surface area
S＝2πRh (5)
The surface area of the object II is therefore
From the above calculations can be derived
Thus, when the volumes are the same, the surface area of the three sphere forming object is 1.2709 times the surface area of the single sphere.
The above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A multi-sphere coupling phase change heat storage material structure with bionic alveolar layout is characterized by comprising a plurality of phase change heat storage spheres, wherein the phase change heat storage spheres form an alveolar heat storage sphere model through bionic coupling of different alveolar numbers; when the number of the phase change heat storage balls is three, a bionic tri-alveolar heat storage ball model is formed; when the number of the phase change heat storage spheres is four, simulating a four-alveolus heat storage sphere model; when the number of the phase-change heat storage balls is five, a five-alveolus heat storage ball model is simulated.
2. The bionic alveolar layout multi-sphere coupling phase change heat storage material structure of claim 1, wherein: the sphere centers of all the phase change heat storage spheres in the bionic tri-alveolar heat storage sphere model are connected to form an equilateral triangle.
3. The bionic alveolar layout multi-sphere coupling phase change heat storage material structure of claim 1, wherein: the sphere centers of each phase change heat storage sphere in the bionic four-alveolus heat storage sphere model are connected to form an equal tetrahedron.
4. The bionic alveolar layout multi-sphere coupling phase change heat storage material structure of claim 1, wherein: the sphere centers of all phase change heat storage spheres in the bionic five-alveolus heat storage sphere model are connected to form a hexahedron.
5. The structure of claim 1, 2, 3 or 4, wherein the structure comprises: the phase-change heat storage ball comprises a shell, solid molten salt and liquid molten salt from outside to inside, and a pasty area is formed at the joint of the solid molten salt and the liquid molten salt.
6. A heat storage tank with a bionic alveolar layout and a multi-sphere coupling phase change heat storage material, which comprises a tank body and the multi-sphere coupling phase change heat storage material with the bionic alveolar layout as claimed in any one of claims 1 to 5, wherein the tank body is filled with the multi-sphere coupling phase change heat storage material with the bionic alveolar layout.
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| CN103968695A (en) * | 2014-05-27 | 2014-08-06 | 哈尔滨工业大学 | Energy storing device with tree directional heat-conducting fin structures |
| CN107560199A (en) * | 2017-10-09 | 2018-01-09 | 北京化工大学 | A kind of bionical collection thermal medium of frog ovum and its manufacture method |
| CN208795045U (en) * | 2018-05-08 | 2019-04-26 | 扬州大学 | Compound cold piece of the storage of bionic metal-phase-change material |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101445381A (en) * | 2008-12-31 | 2009-06-03 | 南京航空航天大学 | Al core/Al2O-based ceramic sheath self-healing composite foam thermal protection structure simulating capillary plexus and manufacture method thereof |
| CN103968695A (en) * | 2014-05-27 | 2014-08-06 | 哈尔滨工业大学 | Energy storing device with tree directional heat-conducting fin structures |
| CN107560199A (en) * | 2017-10-09 | 2018-01-09 | 北京化工大学 | A kind of bionical collection thermal medium of frog ovum and its manufacture method |
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Application publication date: 20200529 |