Phase change ball coupled with bionic DNA double-helix heat exchange structure

Abstract

The utility model discloses a phase change ball of a coupling bionic DNA double-helix heat exchange structure, and belongs to the technical field of phase change heat storage. The utility model solves the problem of how to strengthen the phase change heat transfer of the three-dimensional space in the phase change sphere in the prior art. The device comprises a spherical shell, a bionic DNA double-helix heat exchange structure is arranged in the spherical shell, and a phase change heat storage material layer is arranged in the shell; the bionic DNA double-helix heat exchange structure comprises a first heat exchange pipeline and a second heat exchange pipeline; two first pipelines of the first heat exchange pipeline are coiled around a common central shaft to form a three-dimensional double-helix structure, and the two ends of the two first pipelines communicate with the outside; and two second pipelines of the second heat exchange pipeline are wound on the first heat exchange pipeline. The bionic DNA double-helix heat exchange structure is arranged in the phase change ball, the heat exchange performance of fluid and different layers and multiple three-dimensional spaces in the phase change ball is enhanced through the multiple flow channels and the double-helix structure, and efficient heat storage and release of the phase change ball are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of phase change heat storage, and in particular relates to a phase change ball coupled with a bionic DNA double helix heat exchange structure. Background Art

[0002] Solar energy-rich areas have abundant light resources, which can greatly supplement the heat energy needed by local buildings. However, solar energy is intermittent, and the energy consumption of buildings in the area has a large difference between day and night. How to ensure heating of buildings at night has long been a problem.

[0003] Phase change materials have the advantages of small size and high heat storage density. Therefore, phase change heat storage technology is an effective way to realize the time-sharing utilization of solar energy. In order to use phase change materials more efficiently, many external structure designs are used to enhance the heat transfer performance of phase change materials, including flat phase change structures, cylindrical phase change structures, spherical phase change structures, etc. Among them, the spherical phase change structure is widely favored by the market due to its strong pressure bearing capacity and easy installation. However, the phase change material itself has the defect of low thermal conductivity, and its internal heat exchange enhancement problem needs to be solved.

[0004] In order to complete the above work, many scholars have proposed different solutions, such as a fin-type combined phase change material heat storage ball (CN201910534833.9), which realizes the enhanced heat conduction of the phase change material by setting heat-conducting fins inside the phase change sphere, and a new spherical phase change heat storage system (CN202022379149.9), which uses multi-layer parallel heat-conducting pipelines to realize heat exchange between the heat exchange fluid and the internal phase change material. However, the existing simple fin structure still has thermal conductivity limitations, and the structure of multiple heat exchange pipelines is complex and will greatly reduce the filling rate of the phase change material. Therefore, it is necessary to propose a suitable pipeline heat exchange structure according to the shape of the sphere to improve the heat transfer performance. . Utility Model Content

[0005] In view of the problem of how to strengthen the phase change heat transfer in the three-dimensional space inside the phase change sphere in the prior art, the utility model provides a phase change sphere coupled with a bionic DNA double helix heat exchange structure.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A phase change ball coupled with a bionic DNA double helix heat exchange structure comprises a spherical shell, the bionic DNA double helix heat exchange structure is arranged inside the spherical shell, and a phase change heat storage material layer is arranged inside the shell;

[0008] The bionic DNA double helix heat exchange structure comprises a first heat exchange pipeline and a second heat exchange pipeline;

[0009] The first heat exchange pipeline includes two first pipelines, the two first pipelines are coiled around a common central axis to form a three-dimensional double helix structure, and both ends of the two first pipelines are connected to the outside;

[0010] The second heat exchange pipeline includes two second pipelines, and the two second pipelines are wound around the first heat exchange pipeline.

[0011] After adopting this technical solution, the bionic DNA double-helix heat exchange structure is placed inside the phase change sphere. Through multiple flow channels and double-helix structures, the heat exchange performance between the fluid and different levels and multiple three-dimensional spaces inside the phase change sphere is enhanced, the heat storage / release rate of the phase change material is improved, and efficient heat storage and release of the phase change sphere is achieved.

[0012] Preferably, the distance between the two first pipelines gradually decreases from the center of the sphere as the width of the spherical shell changes.

[0013] After adopting this technical solution, by setting a bionic DNA double-helix heat exchange structure inside the phase change sphere, the corresponding heat exchange pipeline radiation range is matched according to the change in the sphere diameter, so as to achieve close heat transfer between the heat exchange fluid and the phase change material at different spatial positions inside the sphere, enhance the mutual mixing of liquid and solid phase change materials inside the sphere, and achieve the goal of improving the internal heat transfer rate and the overall heat storage and release performance.

[0014] Preferably, the diameter of the first pipeline is greater than the diameter of the second pipeline.

[0015] After adopting this technical solution, the DNA structure is simulated by cooperating between the first pipeline with a large diameter and the second pipeline with a small diameter, thereby increasing the heat exchange area between the heat exchange fluid and the phase change material.

[0016] Preferably, the diameter of the first pipeline is 10-12 mm, the diameter of the second pipeline is 6-8 mm, and the wall thickness of the first pipeline and the second pipeline is 0.5-1.5 mm.

[0017] Preferably, the second pipelines are alternately and obliquely wound around the first heat exchange pipeline in sequence, and the inclination angles of the two second pipelines are opposite, and both ends of the two second pipelines are connected to the outside.

[0018] After adopting this technical solution, the second pipeline is alternately and obliquely wound on the first heat exchange pipeline in sequence to further increase the length of the second pipe, thereby increasing the heat exchange area.

[0019] Preferably, the inclination angle of the second pipeline is 30°-45°.

[0020] Preferably, the diameter of the spherical shell is 40 mm-200 mm, and the thickness of the spherical shell is 1 mm-1.5 mm.

[0021] Preferably, the upper end surface and the lower end surface of the spherical shell are respectively provided with a first connection hole group and a second connection hole group, and the first connection hole group and the second connection hole group are each composed of two first heat exchange inlets and outlets and two second heat exchange inlets and outlets, and the two first heat exchange inlets and outlets are respectively symmetrically arranged about the ball center point of the spherical shell, and the two second heat exchange inlets and outlets are respectively symmetrically arranged about the ball center point of the spherical shell;

[0022] Both ends of the two first pipelines are respectively connected to the first heat exchange inlet and outlet of the upper end surface and the lower end surface;

[0023] Both ends of the two second pipelines are respectively communicated with the second heat exchange inlet and outlet of the upper end surface and the lower end surface.

[0024] Preferably, the gap between the bionic DNA double helix heat exchange structure and the inner wall of the spherical shell is a closed structure, and the phase change heat storage material layer is arranged in the gap.

[0025] Preferably, the phase-change heat storage material layer is composed of one of paraffin, ester acid, and polyol crystalline hydrate salt.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0027] 1. The utility model places the bionic DNA double helix heat exchange structure inside the phase change ball, and through multiple flow channels and double helix structures, strengthens the heat exchange performance between the fluid and the different levels and multiple three-dimensional spaces inside the phase change ball, improves the heat storage / release rate of the phase change material, and realizes efficient heat storage and release of the phase change ball.

[0028] 2. The utility model sets a bionic DNA double-helix heat exchange structure inside the phase change sphere, matches the corresponding radiation range of the heat exchange pipeline according to the change of the sphere diameter, realizes close-range heat transfer between the heat exchange fluid and the phase change material at different spatial positions inside the sphere, enhances the mutual mixing of liquid and solid phase change materials inside the sphere, and achieves the goal of improving the internal heat transfer rate and the overall heat storage and release performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0030] Figure 1 The utility model is a schematic structural diagram of a phase change ball coupled with a bionic DNA double helix heat exchange structure.

[0031] Figure 2 It is a position relationship diagram of the first connection hole group in the utility model;

[0032] Among them: 1-spherical shell, 2-phase change heat storage material layer, 3-bionic DNA double helix heat exchange structure, 4-first heat exchange pipeline, 5-second heat exchange pipeline, 6-first heat exchange inlet and outlet, 7-second heat exchange inlet and outlet. DETAILED DESCRIPTION

[0033] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0034] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] Combine the following Figure 1-Figure 2 The utility model is described in detail.

[0036] Example 1

[0037] like Figure 1-2 As shown, a phase change ball coupled with a bionic DNA double helix heat exchange structure comprises a spherical shell 1, a bionic DNA double helix heat exchange structure 3 is arranged inside the spherical shell 1, and a phase change heat storage material layer 2 is arranged inside the shell;

[0038] The bionic DNA double helix heat exchange structure 3 comprises a first heat exchange pipeline 4 and a second heat exchange pipeline 5;

[0039] The first heat exchange pipeline 4 includes two first pipelines, the two first pipelines are coiled around a common central axis to form a three-dimensional double helix structure, and both ends of the two first pipelines are connected to the outside;

[0040] The second heat exchange pipeline 5 includes two second pipelines, and the two second pipelines are wound around the first heat exchange pipeline 4 .

[0041] In this embodiment, the gap between the bionic DNA double helix heat exchange structure 3 and the inner wall of the spherical shell 1 is a closed structure, and the phase change heat storage material layer 2 is arranged in the gap.

[0042] In this embodiment, the diameter of the spherical shell 1 is 120 mm, the diameter of the first pipeline is 10 mm, the diameter of the second pipeline is 6 mm, and the wall thickness of the spherical shell 1, the first pipeline and the second pipeline are all 1 mm.

[0043] In this embodiment, the phase change thermal storage material layer 2 is composed of paraffin.

[0044] The specific use method of the utility model is as follows:

[0045] Reference Figure 1-Figure 2 The phase change thermal storage material layer 2 and the bionic DNA double helix heat exchange structure 3 are located in the spherical shell 1. The space inside the spherical shell 1 and outside the bionic DNA double helix heat exchange structure 3 is filled with the phase change thermal storage material layer 2. The outside of the spherical shell 1, the first pipeline and the second pipeline are filled with heat exchange fluid and heat is exchanged through flow.

[0046] Example 2

[0047] This embodiment is basically the same as the embodiment 1, except that: in this embodiment, the distance between the two first pipelines gradually decreases from the center of the sphere as the width of the spherical shell 1 changes. By setting the variable distance of the first heat exchange pipeline 4, according to the change trend of the sphere diameter, the arrangement range of the heat exchange pipeline in the phase change sphere is extended to the maximum extent, so as to achieve close-range heat exchange in a wide area.

[0048] Example 3

[0049] This embodiment is basically the same as the embodiment 1, except that the second pipeline is alternately and obliquely wound on the first heat exchange pipeline 4, and the inclination angles of the two second pipelines are opposite, the inclination angle is 30°, and both ends of the two second pipelines are connected to the outside. The second pipeline is alternately and obliquely wound on the first heat exchange pipeline 4 to further increase the length of the second pipeline, thereby increasing the heat exchange area.

[0050] Example 4

[0051] This embodiment is basically the same as the embodiment 1, except that: the upper end surface and the lower end surface of the spherical shell 1 are respectively provided with a first connection hole group and a second connection hole group, the first connection hole group and the second connection hole group are each composed of two first heat exchange inlets and outlets 6 and two second heat exchange inlets and outlets 7, the two first heat exchange inlets and outlets 6 are respectively symmetrically arranged about the ball center point of the spherical shell 1, and the two second heat exchange inlets and outlets 7 are respectively symmetrically arranged about the ball center point of the spherical shell 1;

[0052] Both ends of the two first pipelines are respectively connected to the first heat exchange inlet and outlet 6 of the upper end surface and the lower end surface;

[0053] The two ends of the second pipelines are respectively connected to the second heat exchange inlet and outlet 7 of the upper end surface and the lower end surface;

[0054] The diameter of the first pipeline is greater than the diameter of the second pipeline.

[0055] The diameter of the first heat exchange inlet and outlet 6 is equal to the diameter of the first pipeline, and the diameter of the second heat exchange inlet and outlet 7 is equal to the diameter of the first pipeline. Different inlets and outlets are set according to different heat exchange pipelines, which increases the internal heat exchange fluid flow rate while reducing the mutual interference of fluids in different pipelines, further improving the heat transfer rate and overall heat storage and release performance of the phase change sphere.

[0056] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A phase change ball coupled with a bionic DNA double helix heat exchange structure, characterized in that: It comprises a spherical shell (1), a bionic DNA double helix heat exchange structure (3) is arranged inside the spherical shell (1), and a phase change heat storage material layer (2) is arranged inside the shell; The bionic DNA double helix heat exchange structure (3) comprises a first heat exchange pipeline (4) and a second heat exchange pipeline (5); The first heat exchange pipeline (4) comprises two first pipelines, the two first pipelines are coiled around a common central axis to form a three-dimensional double helix structure, and both ends of the two first pipelines are connected to the outside; The second heat exchange pipeline (5) comprises two second pipelines, and the two second pipelines are wound around the first heat exchange pipeline (4).

2. The phase change ball coupled with a bionic DNA double helix heat exchange structure according to claim 1, characterized in that: The distance between the two first pipelines gradually decreases from the center of the sphere as the width of the spherical shell (1) changes.

3. The phase change ball coupled with a biomimetic DNA double helix heat exchange structure according to claim 1, characterized in that: The diameter of the first pipeline is greater than the diameter of the second pipeline.

4. The phase change ball coupled with a biomimetic DNA double helix heat exchange structure according to claim 1, characterized in that: The two second pipelines are alternately and tiltedly wound around the first heat exchange pipeline (4), and the tilt angles of the two second pipelines are opposite. Both ends of the two second pipelines are connected to the outside.

5. The phase change ball coupled with the biomimetic DNA double helix heat exchange structure according to claim 4, characterized in that: The inclination angle of the second pipeline is 30°-45°.

6. The phase change ball coupled with a biomimetic DNA double helix heat exchange structure according to any one of claims 1 to 5, characterized in that: The diameter of the spherical shell (1) is 40 mm-200 mm, and the thickness of the spherical shell (1) is 1 mm-1.5 mm.

7. The phase change ball coupled with a biomimetic DNA double helix heat exchange structure according to any one of claims 1 to 5, characterized in that: The upper end surface and the lower end surface of the spherical shell (1) are respectively provided with a first connection hole group and a second connection hole group, the first connection hole group and the second connection hole group are each composed of two first heat exchange inlets and outlets (6) and two second heat exchange inlets and outlets (7), the two first heat exchange inlets and outlets (6) are respectively arranged symmetrically about the ball center point of the spherical shell (1), and the two second heat exchange inlets and outlets (7) are respectively arranged symmetrically about the ball center point of the spherical shell (1); The two ends of the two first pipelines are respectively connected to the first heat exchange inlet and outlet (6) of the upper end surface and the lower end surface; Both ends of the two second pipelines are respectively connected to the second heat exchange inlet and outlet (7) of the upper end surface and the lower end surface.

8. The phase change ball coupled with a biomimetic DNA double helix heat exchange structure according to any one of claims 1 to 5, characterized in that: The gap between the bionic DNA double helix heat exchange structure (3) and the inner wall of the spherical shell (1) is a closed structure, and the phase change heat storage material layer (2) is arranged in the gap.

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