CN106979714B - Rhombic fin tube bundle - Google Patents
Rhombic fin tube bundle Download PDFInfo
- Publication number
- CN106979714B CN106979714B CN201710318666.5A CN201710318666A CN106979714B CN 106979714 B CN106979714 B CN 106979714B CN 201710318666 A CN201710318666 A CN 201710318666A CN 106979714 B CN106979714 B CN 106979714B
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- China
- Prior art keywords
- base
- fins
- diamond
- fin
- shaped
- Prior art date
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- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 title description 2
- 230000008859 change Effects 0.000 claims abstract description 14
- 238000005219 brazing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 3
- 229910003460 diamond Inorganic materials 0.000 description 7
- 239000010432 diamond Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a diamond-shaped fin tube bundle, which comprises a base tube and fins, wherein the number of the base tube is at least one, and the fins are a plurality of thin sheets which are arranged in parallel along the axial direction of the base tube and are connected to the base tube at fixed intervals; the fins are in the form of H-shaped fins of rhombus or similar rhombus or symmetrical two isosceles triangles, the included angle alpha of two sides of the windward side of the rhombus is equal to the included angle beta formed by connecting the circle centers of the adjacent two base pipes, the degree of alpha can be changed according to the change of the interval of the staggered tube bundles, and the change range is 0< alpha <180 degrees; the diamond-shaped fin tube bundle provided by the invention can effectively utilize heat exchange space, guide heat exchange fluid to flow, reduce resistance, reduce abrasion and improve heat exchange efficiency, can flexibly change the shape and the size of fins according to the spacing of the base tubes, and is suitable for fin type heat exchangers in various different occasions.
Description
Technical Field
The invention relates to a finned tube, in particular to a diamond-shaped finned tube and an H-shaped finned tube derived from the diamond-shaped finned tube, which are suitable for various heat exchange and heating equipment in the industries of electric power, chemical engineering, metallurgy, steel, construction and the like.
Background
Along with the development of the economy in China, energy conservation and consumption reduction become an important subject, and the sustainable development process in China is affected. The heat exchanger is an important device commonly applied in various industries such as energy, chemical industry, metallurgy, construction and the like, and is a main energy consumption source in the industries. The heat exchange efficiency of the heat exchanger is improved, and the heat exchanger has realistic and urgent significance for promoting the development of important industries in China.
The heat exchanger functions to transfer heat rapidly from one medium to another. When the heat transfer coefficients of the two media are different, the effective method for improving the flow speed of the medium with small heat transfer coefficient, increasing the contact area of the medium with small heat transfer coefficient and the heat exchanger and reasonably arranging the heat exchange surface in the heat exchanger is to reduce the heat transfer resistance and improve the heat exchange efficiency of the heat exchanger. The fin tube can increase the heat exchange area by more than 5 times by adding fins on the surface of the common tube, and is widely applied to boilers, refrigeration and various industrial heat exchangers.
With the continuing awareness of the thermal process, spiral-type finned tubes and H-type finned tubes have been developed. The spiral fin tube is round, is wound on the base tube, and forms a certain angle with the fluid flow direction. The spiral fin tube has a high fin formation coefficient and a high heat transfer efficiency, but has a problem of easy dust deposition. The H-shaped finned tube is formed by symmetrically welding two rectangular steel sheets with circular arcs in the middle on a base tube, and the shape of the front face of the H-shaped finned tube is similar to that of the letter H. The gap between two steel sheets of the H-shaped finned tube can play a role in guiding flow, and has stronger self-ash-cleaning capability.
In either case, the finned tubes are arranged in tube rows in the heat exchanger. According to the arrangement mode of the tube rows, the tube rows are divided into a sequential tube bundle and a staggered tube bundle. The in-line tube bundles have lower heat exchange coefficient due to less disturbance of fluid. When the staggered tube bundles are arranged, the gaps between two adjacent rows of fins of the spiral fin tube are larger, so that the space cannot be fully utilized to further improve the heat exchange area; the H-shaped finned tube has large resistance to fluid due to the square fin structure, and the utilization rate of the heat exchange space cannot be further improved by adjusting the spacing between tube rows.
Patent CN104501639a considers the influence of H-type fins on the inflow resistance, and designs the fin shape as a trapezoid or trapezoid, but in the staggered tube bundle arrangement mode, a gap with a certain shape is formed between two adjacent rows of fins, which causes waste of heat exchange space.
Disclosure of Invention
In order to overcome the problems in the prior art and improve the heat exchange efficiency of the finned tube heat exchanger, the invention aims to provide a diamond-shaped finned tube bundle, so that the utilization rate of a heat exchange space is improved, the problem of larger resistance of an H-shaped finned tube is solved, the heat exchange efficiency of the heat exchanger is improved, and the material consumption of the heat exchanger is reduced.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the diamond-shaped fin tube bundle comprises a base tube 1 and fins 2, wherein the number of the base tubes 1 is at least one, and the fins 2 are a plurality of thin sheets which are arranged in parallel along the axial direction of the base tube 1 and are connected to the base tube at fixed intervals; each fin is provided with a semicircular groove which is matched with the shape of the outer wall of the base pipe 1, and is spliced with the base pipe 1; the structure formed by the base pipes 1 and the fins 2 is arranged in a staggered manner in the form of a tube group in the space range of the heat exchanger or the space required to exchange heat.
The outer edge of the fin 2 is diamond-shaped, the included angle alpha of two edges of the windward side of the diamond-shaped is equal to the included angle beta formed by connecting the circle centers of two adjacent base pipes, the degree of alpha is changed according to the change of the interval of the staggered tube bundles, and the change range is 0< alpha <180 degrees.
The shape of the base pipe 1 is circular or elliptical.
The fin 2 is formed by stamping at one time, and is welded with the base pipe 1 by using a semicircular groove in a flash build-up welding or brazing mode.
The distance b between the fins 2 on the same plane on the two adjacent base pipes 1 is adjusted according to the distance a between the base pipes 1, and the adjustment range is 0< b < a.
Any two angles or all four angles which are opposite to each other in the diamond-shaped outer edges of the fins 2 are changed into circular arcs;
each fin 2 is two symmetrical isosceles triangle fins, a structure similar to an H-shaped fin tube is formed, and the base angle gamma of the isosceles triangle of the fin 2 is half of an included angle beta formed by connecting the circle centers of two adjacent base tubes, namely gamma=beta/2.
Compared with the prior art, the invention has the following advantages:
according to the diamond-shaped fin tube bundle provided by the invention, the included angle alpha between the two sides of the windward side of the diamond is equal to the included angle beta formed by connecting the circle centers of the adjacent base tubes, so that the heat exchange space between the base tubes can be effectively utilized, and the heat exchange efficiency is improved. Under the condition that the base tube spacing is the same, the fin area of the diamond-shaped finned tube is increased by 10% compared with that of the spiral finned tube, and the heat exchange space at the midpoint of the connecting lines of two adjacent rows of tubes is fully utilized when the spiral finned tubes are arranged in staggered mode. When the fin 2 pitch b is particularly small, the fins may be distributed throughout the entire space.
According to the diamond-shaped finned tube bundle provided by the invention, as the fins are diamond-shaped, air flows along the edges of the fins when flowing through the heat exchange tube row, and the flowing track is in a zigzag shape, so that the flow of fluid can be effectively guided, the uniform flow of the fluid is facilitated, the heat exchange effect is improved, the resistance is reduced, and the abrasion is reduced. The spiral fin tube or the H-shaped fin tube has fluid straight-through flow paths among the fins on the plane where the fins are located, so that the fluid short circuit is caused, and the uniformity of the flow field and the heat exchange effect are affected. The adjacent fins are in a zigzag shape, no through flow path exists, the flow guiding effect can be effectively achieved, the flow is more uniform, and the heat exchange effect is better. Compared with the H-shaped finned tube, the windward side of the fin forms a certain angle, has smaller resistance to fluid, and can effectively relieve the abrasion of the fluid to the first row of tubes on the windward side.
According to the diamond-shaped fin tube bundle provided by the invention, the included angle alpha between the two sides of the windward side of the diamond is equal to the included angle beta formed by connecting the circle centers of the adjacent base tubes, the fin shape can be changed according to the change of the included angle formed by staggering the circle centers of the adjacent base tubes, the influence of the fin shape on the spacing of the base tubes is eliminated, and the diamond-shaped fin tube bundle can be flexibly applied to tube heat exchangers with different sizes and spacing. According to the invention, the included angle alpha between the two sides of the windward surface of the fin can be adjusted according to the change of the base pipe spacing, when the included angle is reduced, the base pipe spacing is reduced, and more base pipes can be arranged when the section of the flue is unchanged, so that the number of base pipe rows is reduced, and the material consumption is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of example 1 of the present invention.
Fig. 2 is a front view of example 1 of the present invention.
Fig. 3 is a schematic structural view of example 2 of the present invention.
Fig. 4 is a front view of example 2 of the present invention.
Fig. 5 is a schematic view of the structure of example 3 of the present invention.
Fig. 6 is a front view of example 3 of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, a diamond-shaped fin tube bundle comprises a base tube 1 and fins 2. Wherein, the base pipes 1 are arranged in a staggered manner, a plurality of fins 2 are arranged on each base pipe 1 along the axial direction at equal intervals, and the base pipes 1 are connected with the fins 2 in a brazing manner. The plane of the fin 2 is perpendicular to the axis of the base pipe, and the plane of the axis of each row of base pipes 1 is perpendicular to the direction of air flow (such as flue gas, air and the like). The base pipe 1 is provided with flowing heat exchange working medium (such as water and the like), and exchanges heat with air flow through the base pipe 1 and the fins 2.
As shown in fig. 2, the base pipe 1 has a circular cross section, and the fins 2 have diamond shapes. The included angle alpha of two sides of the diamond windward side is equal to the included angle beta formed by connecting the circle centers of the adjacent two base pipes, the degree of alpha can be changed according to the change of the interval of the staggered tube bundles, and the change range is 0< alpha <180 degrees.
Example 2
As shown in fig. 3 and 4, a diamond-shaped fin tube bundle includes a base tube 1 and fins 2. Wherein, the base pipes 1 are arranged in a staggered manner, a plurality of fins 2 are arranged on each base pipe 1 along the axial direction at equal intervals, and the base pipes 1 are connected with the fins 2 in a brazing manner. The plane of the fin 2 is perpendicular to the axis of the base pipe, and the plane of the axis of each row of base pipes 1 is perpendicular to the direction of air flow (such as flue gas, air and the like). The base pipe 1 is provided with flowing heat exchange working medium (such as water and the like), and exchanges heat with air flow through the base pipe 1 and the fins 2.
As shown in fig. 4, the cross section of the base tube 1 is circular, and the fins 2 are two isosceles triangles symmetrical about the center of the cross section of the base tube 1, so as to form an H-shaped fin structure. The base angle gamma of the isosceles triangle of the fin 2 is half of the included angle beta formed by connecting the circle centers of two adjacent base pipes, namely gamma=beta/2. The distance range of the bottom edges c of the two isosceles triangles of the fin 2 is 0< c < d, and d is the diameter of the base tube 1. The base angle gamma of two isosceles triangles of the fin 2 changes along with the distance between two adjacent base pipes 1, and the change range is 0< gamma <90 degrees.
Example 3
As shown in fig. 5 and 6, a diamond-shaped fin tube bundle includes a base tube 1 and fins 2. Wherein, the base pipes 1 are arranged in a staggered manner, a plurality of fins 2 are arranged on each base pipe 1 along the axial direction at equal intervals, and the base pipes 1 are connected with the fins 2 in a brazing manner. The plane of the fin 2 is perpendicular to the axis of the base pipe, and the plane of the axis of each row of base pipes 1 is perpendicular to the direction of air flow (such as flue gas, air and the like). The base pipe 1 is provided with flowing heat exchange working medium (such as water and the like), and exchanges heat with air flow through the base pipe 1 and the fins 2.
As shown in fig. 6, the base pipe 1 has a circular cross section, and the fins 2 have an approximately diamond shape. The two angles of the diamond shape of the fin 2 on the windward side and the leeward side are not changed into arc shapes. The included angle alpha of two sides of the diamond windward side is equal to the included angle beta formed by connecting the circle centers of the adjacent two base pipes, the degree of alpha can be changed according to the change of the interval of the staggered tube bundles, and the change range is 0< alpha <180 degrees.
Claims (5)
1. A diamond-shaped finned tube bundle comprising base tubes (1) and fins (2), wherein the number of the base tubes (1) is at least one, and the diamond-shaped finned tube bundle is characterized in that: the fins (2) are a plurality of thin sheets which are arranged in parallel along the axial direction of the base pipe (1) and are connected to the base pipe at fixed intervals; each fin is provided with a semicircular groove which is matched with the shape of the outer wall of the base pipe (1), and is spliced with the base pipe (1); the structure formed by the base tube (1) and the fins (2) is arranged in a staggered manner in the space range of the heat exchanger or the heat exchange requirement in a tube group mode;
the outer edge of the fin (2) is diamond-shaped, the included angle alpha of two sides of the windward side of the diamond-shaped is equal to the included angle beta formed by connecting the circle centers of the adjacent two base pipes, the degree of alpha is changed according to the change of the interval of the staggered tube bundles, and the change range is 0< alpha <180 degrees;
each fin (2) is two symmetrical isosceles triangle fins to form a structure similar to an H-shaped fin tube, and the base angle gamma of the isosceles triangle of the fin (2) is half of an included angle beta formed by connecting the circle centers of two adjacent base tubes, namely gamma=beta/2.
2. A diamond-shaped finned tube bundle according to claim 1 wherein: the shape of the base pipe (1) is round or elliptical.
3. A diamond-shaped finned tube bundle according to claim 1 wherein: the fin (2) is formed in one step by stamping, and is welded with the base pipe (1) by utilizing a semicircular groove, wherein the welding mode is flash build-up welding or brazing.
4. A diamond-shaped finned tube bundle according to claim 1 wherein: the distance b between the fins (2) on the same plane on the two adjacent base pipes (1) is adjusted according to the distance a between the base pipes (1), and the adjustment range is 0< b < a.
5. A diamond-shaped finned tube bundle according to claim 1 wherein: any two angles or all four angles opposite to each other in the diamond-shaped outer edges of the fins (2) are changed into circular arcs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710318666.5A CN106979714B (en) | 2017-05-08 | 2017-05-08 | Rhombic fin tube bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710318666.5A CN106979714B (en) | 2017-05-08 | 2017-05-08 | Rhombic fin tube bundle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106979714A CN106979714A (en) | 2017-07-25 |
| CN106979714B true CN106979714B (en) | 2023-12-05 |
Family
ID=59343345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710318666.5A Active CN106979714B (en) | 2017-05-08 | 2017-05-08 | Rhombic fin tube bundle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106979714B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470076A (en) * | 2017-09-08 | 2019-03-15 | 美的集团股份有限公司 | Fin and heat exchanger |
| CN108413428A (en) * | 2018-03-30 | 2018-08-17 | 青岛达能环保设备股份有限公司 | Gas-liquid-solid coalescence absorbs the flue gas deep cooler for inhibiting low-temperature corrosion |
| CN109737794A (en) * | 2019-03-05 | 2019-05-10 | 烟台龙源电力技术股份有限公司 | A kind of heat exchange element |
| CN110657690A (en) * | 2019-11-05 | 2020-01-07 | 广东美的白色家电技术创新中心有限公司 | Heat exchanger and processing method thereof, refrigeration equipment and mold |
| CN113465401B (en) * | 2021-08-13 | 2023-05-16 | 郑州大学 | Waste heat recovery device for dust-containing waste gas and soot blowing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2058216A1 (en) * | 1969-08-12 | 1971-05-28 | Maschf Augsburg Nuernberg Ag | Heat exchanger with transversely flowed - tubular ribs |
| JPH1054683A (en) * | 1996-08-08 | 1998-02-24 | Hitachi Ltd | Heat exchanger |
| CN203940768U (en) * | 2014-06-08 | 2014-11-12 | 袁晨雅 | Install the elliptical H-shaped finned tube of long direction eddy generator enhanced heat exchange additional |
| WO2015188812A1 (en) * | 2014-06-11 | 2015-12-17 | GEA Luftkühler GmbH | Heat exchanger |
| CN206787361U (en) * | 2017-05-08 | 2017-12-22 | 中国华能集团清洁能源技术研究院有限公司 | A kind of lozenge fin tube binding structure |
-
2017
- 2017-05-08 CN CN201710318666.5A patent/CN106979714B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2058216A1 (en) * | 1969-08-12 | 1971-05-28 | Maschf Augsburg Nuernberg Ag | Heat exchanger with transversely flowed - tubular ribs |
| JPH1054683A (en) * | 1996-08-08 | 1998-02-24 | Hitachi Ltd | Heat exchanger |
| CN203940768U (en) * | 2014-06-08 | 2014-11-12 | 袁晨雅 | Install the elliptical H-shaped finned tube of long direction eddy generator enhanced heat exchange additional |
| WO2015188812A1 (en) * | 2014-06-11 | 2015-12-17 | GEA Luftkühler GmbH | Heat exchanger |
| CN206787361U (en) * | 2017-05-08 | 2017-12-22 | 中国华能集团清洁能源技术研究院有限公司 | A kind of lozenge fin tube binding structure |
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| Publication number | Publication date |
|---|---|
| CN106979714A (en) | 2017-07-25 |
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