CN219736097U

CN219736097U - Finned heat exchanger with Ding Baoguan fins

Info

Publication number: CN219736097U
Application number: CN202320688661.2U
Authority: CN
Inventors: 杨秋霞; 宋克伟; 金荣程
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-09-22
Anticipated expiration: 2033-03-31

Abstract

The utility model discloses a heat exchanger with Ding Baoguan fins, which belongs to the technical field of heat transfer and comprises fins, T cells and round tubes, wherein the round tubes sleeve the fins, the T cells are stamped on one side surface of the fins, the fins are arranged in parallel at fixed intervals outside the round tubes, the round tubes are arranged in a staggered manner in a regular triangle manner on the fins, the T cells are symmetrically distributed around the round tubes, and the front end points of the T cells are positioned on the transverse central line of the round tubes. The butyl cell structure is arranged around the circular tube, when fluid flows through the butyl cell, turbulence phenomenon is generated, vortex is formed on the back surface of the butyl cell, the turbulence intensity of the fluid around the butyl cell is enhanced, and therefore a heat transfer boundary layer is weakened or damaged. According to the utility model, by changing the structure of the heat exchanger, the momentum transfer and the energy transfer between the low-temperature fluid affecting the heat transfer wall surface and the main flow area are enhanced, the heat exchange performance of the tube-fin heat exchanger is improved, and finally the enhanced heat transfer is realized.

Description

Finned heat exchanger with Ding Baoguan fins

Technical Field

The utility model relates to the technical field of heat transfer, in particular to a finned heat exchanger with Ding Baoguan fins.

Background

The heat exchanger plays an important role in the process of generating electric energy or transmitting heat energy. In the present day of global energy shortage, in order to save energy, research on heat transfer enhancement and energy consumption enhancement of the tube and fin heat exchanger becomes very important. At present, the heat exchange of the tube-fin heat exchanger is enhanced mainly by changing the shape of fins and adding vortex generators on the surfaces of the fins, so that from the mechanical and manufacturing viewpoints, the integral structural strength of the tube-fin heat exchanger can be weakened by adopting slotted fins or installing longitudinal vortex generators, moreover, the notch is generally perpendicular to inflowing fluid, the pressure drop is obviously increased while the heat transfer is enhanced, the flow resistance is increased, and the comprehensive heat exchange effect is further reduced.

Based on the above, the utility model designs a fin heat exchanger with Ding Baoguan fins to solve the above problems.

Disclosure of Invention

The present utility model is directed to a fin heat exchanger with Ding Baoguan to solve the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a fin type heat exchanger with Ding Baoguan comprises fins, butyl cells and round tubes, wherein the round tubes are used for sleeving the fins in a penetrating mode, and the butyl cells are punched on one side surface of each fin.

Preferably, the fins are common straight fins with the thickness of 0.12mm and the spacing between adjacent fins is H=1.7-2.3 mm, and the fins are arranged in multiple layers and are arranged in parallel outside the circular tube at fixed spacing so as to enhance the heat exchange performance of the air side outside the circular tube.

Preferably, the round tube is circular, the thickness is the same as that of the fins, the value of the outer diameter is D=8.9 mm, and the space between the longitudinal tubes is S ₁ =15.5-22 mm, transverse tube spacing S ₂ The tube is filled with hot fluid, and the round tubes are staggered on the fins in a regular triangle mode.

Preferably, the surface of the fin is provided with the butyl cells by a punching mode, the number of the butyl cells arranged around the circular tube is 2, the front end points of the butyl cells are positioned on the transverse central line of the circular tube, the thickness of the butyl cells is the same as that of the fin, the long axis range of the butyl cells is a=3.8-8.8 mm, and the short axis range is b=1.8-3.32 mm.

Preferably, the distance l=8.8 mm from the front end point of the butyl cell to the center of the circular tube, and the included angle between the long axis of the butyl cell and the incoming flow direction is an attack angle beta and beta=0-40 degrees.

Preferably, the fin material is an aluminum fin, and the round tube is an aluminum tube.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the whole structural strength is not weakened by arranging the T cells around the circular tube, the T cells can be formed on the surface of the fin in a stamping mode, and the operation is simple and the mass production is easy. The flow boundary layer is separated by utilizing the reverse pressure gradient on the upstream of the surface of the butyl cell, so that fluid is vortex, the fluid far away from the heat exchange surface is tangential, the tangential velocity is generated, the fluid acts on the heat exchange surface, the thickness of the heat boundary layer is destroyed, the heat exchange is enhanced, the momentum transfer and the energy transfer between the low-temperature fluid affecting the heat transfer wall surface and the main flow area are enhanced, the heat exchange performance of the tube-fin heat exchanger is improved, and finally the enhanced heat transfer is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic top view of the present utility model;

FIG. 3 is a schematic side view of the present utility model;

FIG. 4 is a schematic diagram of the arrangement of the butyl cell of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1-fin, 2-butanal cell, 3-round tube, D-Round tube outside diameter S ₁ Longitudinal spacing of round tubes S ₂ -the horizontal spacing of the round tube, the distance from the front end point of the L-butyl cell to the center of the round tube, the long axis of the a-butyl cell, the short axis of the b-butyl cell, the included angle between the long axis of the beta-butyl cell and the incoming flow direction, and the spacing of the H-adjacent fins.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution:

a fin heat exchanger with Ding Baoguan comprises fins 1, T cells 2 and round tubes 3, wherein the round tubes 3 are used for sleeving the fins 1, and the T cells 2 are punched on one side surface of the fins 1.

The fins 1 are common straight fins, the thickness is 0.12mm, the distance between every two adjacent fins 1 is H=1.7-2.3 mm, and the fins 1 are arranged in multiple layers and are arranged in parallel outside the circular tube 3 at fixed distances so as to enhance the heat exchange performance of the air side outside the circular tube 3. The circular tube 3 is circular, the thickness is the same as that of the fin 1, the value of the outer diameter is D=8.9 mm, and the space between the longitudinal tubes is S ₁ =15.5-22 mm, transverse tube spacing S ₂ The tube is filled with hot fluid, and round tubes 3 are staggered on the fins 1 in a regular triangle mode. The surface of the fin 1 is provided with the butyl cells 2 by punching, the number of the butyl cells 2 arranged around the round tube 3 is 2, the front end points of the butyl cells 2 are positioned on the transverse central line of the round tube 3, the thickness of the butyl cells 2 is the same as that of the fin 1, the long axis range of the butyl cells 2 is a=3.8-8.8 mm, and the short axis range is b=1.8-3.32 mm. The distance l=8.8 mm from the front end point of the butyl cell 2 to the center of the circular tube 3, and the included angle between the long axis of the butyl cell 2 and the incoming flow direction is an attack angle beta and beta=0-40 degrees. The fin 1 is made of aluminum fins, and the round tube 3 is an aluminum tube.

One specific application of this embodiment is: when the utility model is used, high-temperature fluid with the temperature of 333K flows in the circular tube 3, and cooling air with the temperature of 293K flows in a channel formed by the fin 1 and the circular tube 3. When the high-temperature liquid flows in the circular tube 3, heat is transferred to the inner wall of the circular tube 3 through convection, the inner wall transfers the heat to the outer wall of the circular tube 3 and the fins 1 through heat conduction, and finally the outer wall of the circular tube 3 and the fins 1 heat cooling air in a channel formed by the fins 1 and the circular tube 3 in a forced convection and heat radiation mode, so that the aim of heat exchange is achieved. When the fluid of the tube-fin heat exchanger flows through the second half area of the circular tube 3, the fluid can be subjected to deceleration and pressurization flow, the boundary layer loses a large amount of kinetic energy due to overcoming viscous friction, the sufficient pressure can not be supplemented to balance with the main flow pressure, the boundary layer is separated, and the fluid can not fully flow to the area behind the circular tube 3. The structure of the T-cell 1 is arranged around the round tube 3, when fluid flows through the T-cell 1, turbulence phenomenon is generated, and vortex is formed on the back surface of the T-cell 1. If the transverse dimension of the butane cell 1 forms an angle with the incoming flow direction, the generated vortex does not stay in a certain area, but can move forward along with the flowing of the main fluid to form a series of ordered longitudinal vortices, so that the heat exchange performance of the surface of the fin 1 in the wake area is improved. The existence of the longitudinal vortex aggravates the disturbance intensity of surrounding fluid, thereby weakening or destroying the heat transfer boundary layer, influencing the momentum transfer and the energy transfer between the heat transfer wall surface and the low-temperature fluid in the main flow area, and finally realizing the enhancement of heat transfer.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The utility model provides a take Ding Baoguan fin heat exchanger, includes fin (1), butyl cell (2) and pipe (3), its characterized in that: the round tube (3) is used for sleeving the fins (1), and the T cells (2) are punched on one side surface of the fins (1).

2. A strip Ding Baoguan fin heat exchanger according to claim 1, wherein: the fin (1) is a common straight fin, the thickness is 0.12mm, the distance between every two adjacent fins (1) is H=1.7-2.3 mm, and the fins (1) are arranged in multiple layers and are arranged in parallel outside the circular tube (3) at fixed distances so as to enhance the heat exchange performance of the air side outside the circular tube (3).

3. A strip Ding Baoguan fin heat exchanger according to claim 1, wherein: the circular tube (3) is circular, the thickness is the same as that of the fin (1), the value of the outer diameter is D=8.9 mm, and the space between the longitudinal tubes is S ₁ =15.5-22 mm, transverse tube spacing S ₂ The heat fluid is contained in the tube, the round tubes (3) are staggered on the fins (1) in a regular triangle mode.

4. A strip Ding Baoguan fin heat exchanger according to claim 1, wherein: the T-shaped cells (2) are prepared on the surface of the fin (1) in a stamping mode, the number of the T-shaped cells (2) arranged around the round tube (3) is 2, the front end points of the T-shaped cells (2) are located on the transverse central line of the round tube (3), the thickness of the T-shaped cells (2) is the same as that of the fin (1), the long axis range of the T-shaped cells (2) is a=3.8-8.8 mm, and the short axis range is b=1.8-3.32 mm.

5. A strip Ding Baoguan fin heat exchanger according to claim 1, wherein: the distance L=8.8 mm from the front end point of the T-cell (2) to the center of the circular tube (3), and the included angle between the long axis of the T-cell (2) and the incoming flow direction is an attack angle beta and beta=0-40 degrees.

6. A strip Ding Baoguan fin heat exchanger according to claim 1, wherein: the fin (1) is made of aluminum fins, and the round tube (3) is an aluminum tube.