CN114152119A - Wave graphite fin heat exchanger - Google Patents
Wave graphite fin heat exchanger Download PDFInfo
- Publication number
- CN114152119A CN114152119A CN202111344338.5A CN202111344338A CN114152119A CN 114152119 A CN114152119 A CN 114152119A CN 202111344338 A CN202111344338 A CN 202111344338A CN 114152119 A CN114152119 A CN 114152119A
- Authority
- CN
- China
- Prior art keywords
- graphite
- tube
- fins
- heat exchanger
- same
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 96
- 239000010439 graphite Substances 0.000 title claims abstract description 96
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 230000003467 diminishing effect Effects 0.000 claims abstract description 3
- 230000000737 periodic effect Effects 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a wave-shaped graphite fin heat exchanger which is provided with a tube shell, wherein a plurality of parallel graphite tubes are arranged in the tube shell. The graphite tube outer wall on have along the graphite fin of radial outside extension, the pipe diameter of all graphite tubes itself is the same, the external diameter of the graphite fin of different axial positions on the non-reducing graphite tube is all the same, the external diameter of the graphite fin of different axial positions on the reducing graphite tube is different, by little increase, by big diminishing again, periodic transformation. The heat exchange effect of the cold fluid and the hot fluid is good, and the flow resistance of the two fluids is very small.
Description
Technical Field
The invention relates to a heat exchange device for cold and hot media.
Background
Devices that transfer heat from a hot fluid to a cold fluid are referred to as heat exchange devices. The heat exchange equipment is widely applied to oil refining, chemical engineering, light industry, pharmacy, machinery and food.
The tubular heat exchanger consists of tubes, tube plates, baffle plates, shell, end covers (tube boxes), etc. The quality of the design and manufacture thereof directly affects the service life of the heat exchanger and the continuity of production. The most likely failure of a shell and tube heat exchanger is leakage at the tube and tube sheet connection.
The fixed tube-plate type tubular heat exchanger mainly comprises a shell, a tube plate, a tube bundle, a top cover and other parts. One fluid flows outside the tubes (between the tubes), and the other fluid flows inside the tubes, and heat is transferred through the tube walls.
Application number is 2018208850239's utility model discloses a graphite heat exchanger, including graphite heat exchanger body, graphite heat exchanger body both sides difference fixed connection's left head and right head, two carbon fiber graphite pipes of fixedly connected with between left head and the right head, the carbon fiber graphite pipe is located inside the graphite heat exchanger body, the carbon fiber graphite pipe includes the graphite pipe body, graphite fin subassembly, first protective sleeve, second protective sleeve, through the first protective sleeve of the nested fixed high polyvinyl chloride component in the second protective sleeve that is fixed with ceramic member and the outside in the inboard embedding of carbon fiber graphite pipe. The protective sleeve and the graphite fins extend along the axial direction, the protective sleeve influences the graphite tube to carry out heat exchange, and the graphite fins influence fluid outside the graphite tube to flow in the radial direction perpendicular to the tube wall.
Disclosure of Invention
The purpose of the invention is as follows:
the wave-shaped graphite fin heat exchanger is high in heat exchange efficiency and capable of automatically guiding flow without a tube plate.
Technical scheme
The wave-shaped graphite fin heat exchanger is provided with a tube shell, a plurality of parallel graphite tubes are arranged in the tube shell, the left end and the right end of the tube shell are respectively provided with a liquid inlet and a liquid outlet, a fluid (another liquid or gas) inlet is arranged above the tube shell, and a fluid outlet is arranged below the tube shell.
The graphite fins (or corrosion-resistant metal fins) extending outwards along the radial direction are arranged on the outer wall of the graphite tube, and the graphite fins can increase the heat exchange area of fluid inside and outside the graphite tube by more than one time, so that the heat exchange efficiency is improved.
All the graphite tubes have the same tube diameter.
But the graphite fins at different axial positions on a part of graphite tubes (called non-reducing graphite tubes) have the same outer diameter and the outer diameter is the minimum; the graphite fins (or corrosion-resistant metal fins) at different axial positions on the other part of the graphite tube (called as a reducing graphite tube) have different outer diameters, and the outer diameters of the graphite fins along the axial direction are periodically changed from small to large.
The number of the fins on all the graphite tubes is the same, and the fins with the same serial number are positioned in the same radial plane.
Non-reducing graphite pipe and reducing graphite pipe alternate setting for form different clearances between the adjacent graphite pipe, the clearance is by big diminishing along the axial, again by little grow, periodic variation. The size of the flowing space of the fluid is changed periodically, and the fluid flows smoothly at the place with large gap and has large flow; the small space has poor fluid flow and small flow.
Where the gap is small, it is equivalent to having a tubesheet barrier so that the fluid flows mostly along the space where the gap is large.
Namely, the graphite fins with the changed outer diameter not only have the function of increasing the heat exchange area, but also have the function of cutting and guiding the flow of the tube plate. And the tube plate is not present, the flow of the fluid is not hard to be blocked, the streamline distribution and the flow guidance are naturally formed, the flow resistance is small, the noise is low, and the friction force is small.
The optimized graphite fins are movably connected with the graphite tube, and the graphite fins can be fixed after the positions of the graphite fins are adjusted along the outer wall of the graphite tube, so that the gaps between the fins are changed according to different regularity.
Preferably, the gaps exhibit a wave (sine wave) distribution pattern (rather than straight gaps) similar to the way in which a fluid is waved and propagated by external disturbances in its natural state. We know that the wavelength of a sine wave = wave speed × period; in the present invention, it is preferable that when the product of the flow velocity of the fluid entering the tube shell and the flow time length therein is equal to the wavelength of the sine wave (the tube length of the graphite tube may be equal to the wavelength or an integral multiple of the wavelength), resonance is formed and the flow resistance of the fluid is minimized. The graphite tube has a smooth inner wall, wherein the flow resistance of the fluid is naturally small.
Has the advantages that:
the surface area of the heat exchange of the invention is larger than that of the conventional graphite tube, and the heat exchange effect of cold and hot fluid is good; the flow resistance of both fluids is small, especially when the wavelength = wave speed period of the sine wave formed by the gap, the flow resistance of the fluid in the tube shell is minimal. And the use of a tube plate is omitted, so that the flow of the fluid outside the graphite tube has no disturbance or surge flow caused by rigid obstruction, the flow is in a streamline form, and the flow resistance and the maintenance and replacement frequency of parts are reduced.
Graphite fin and graphite pipe are swing joint, and the interval can be adjusted between the adjacent fin on same graphite pipe, and the clearance between the same sequence number fin on the adjacent graphite pipe can design and confirm, and fluidic flow can design and adjust in the tube shell, and then can adjust the flow ratio of two kinds of fluid for the difference in temperature of heat exchange reaches the effect that needs.
Drawings
Fig. 1 is a schematic view of an axial sectional structure of the present invention.
Figure 2 is an enlarged view of a portion of the graphite tube of figure 1.
Fig. 3 is a radial cross-sectional schematic set of views of various locations of the present invention.
FIG. 4 is a schematic view of a heat exchanger structure of a conventional graphite finned tube.
In the figure, 1-liquid inlet; 2-a pipe joint; 3-a fluid inlet; 4-long fins; 5-a liquid outlet; 6-a fluid outlet; 7-short fins; 9-graphite tube. 12-medium fins.
Detailed Description
The corrugated graphite finned heat exchanger shown in fig. 1 has a tube shell, a plurality of parallel graphite tubes are arranged in the tube shell, graphite fins extending outwards along the radial direction are arranged on the outer wall of each graphite tube, the tube diameters of all the graphite tubes are the same, and the outer diameters of the graphite fins are different.
The non-reducing graphite tubes and the reducing graphite tubes are arranged alternately, the outer diameters of graphite fins at different axial positions on one part of the graphite tubes are the same, and the outer diameter is the minimum; the graphite fins at different axial positions on the other part of the graphite tube have different outer diameters, and the outer diameters of the graphite fins along the axial direction are increased from small to small and then are sine-wave-shaped. Different gaps are formed between adjacent graphite tubes, the gaps are changed from large to small and then from small to large along the axial direction, and the gaps are distributed in a sine wave shape as shown in figure 3: the upper gap is small at the beginning, the lower gap is large, the middle gap is small, the upper and lower distances are centered, the lower gap is small, and the upper gap is large.
Figure 2 is an enlarged view of a portion of the graphite tube of figure 1, one of the fins being a short fin and one of the fins being a medium length fin.
Claims (5)
1. The utility model provides a wave graphite finned heat exchanger, has the tube shell, embeds many parallel arrangement's graphite tube, its characterized in that: the graphite tube outer wall is provided with graphite fins extending outwards along the radial direction, the pipe diameters of all the graphite tubes are the same, and the outer diameters of the graphite fins are different.
2. The corrugated graphite fin heat exchanger of claim 1, wherein: the graphite fins at different axial positions on a part of the graphite tube have the same outer diameter, and the outer diameter is the smallest; the outer diameters of the graphite fins at different axial positions on the other part of the graphite tube are different, and the outer diameters of the graphite fins along the axial direction are periodically changed from small to small.
3. The corrugated graphite fin heat exchanger of claim 1 or 2, wherein: the number of the fins on all the graphite tubes is the same, and the fins with the same serial number are positioned in the same radial plane; non-reducing graphite pipe and reducing graphite pipe alternate setting for form different clearances between the adjacent graphite pipe, the clearance is by big diminishing along the axial, again by little grow, periodic variation.
4. The corrugated graphite fin heat exchanger of claim 3, wherein: the gaps present a sine wave-shaped distribution; the product of the flow rate of the fluid into the cartridge and the length of flow therethrough is equal to the wavelength of the sine wave.
5. The corrugated graphite fin heat exchanger of claim 4, wherein: the tube length of the graphite tube is equal to the wavelength of the sine wave or integral multiple of the wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111344338.5A CN114152119B (en) | 2021-11-15 | 2021-11-15 | Wave-shaped graphite fin heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111344338.5A CN114152119B (en) | 2021-11-15 | 2021-11-15 | Wave-shaped graphite fin heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114152119A true CN114152119A (en) | 2022-03-08 |
| CN114152119B CN114152119B (en) | 2024-04-09 |
Family
ID=80460388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111344338.5A Active CN114152119B (en) | 2021-11-15 | 2021-11-15 | Wave-shaped graphite fin heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114152119B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041672A (en) * | 1999-08-02 | 2001-02-16 | Furukawa Electric Co Ltd:The | Heating tube with grooved inner surface and fin machining roll therefor |
| US20050257921A1 (en) * | 2004-05-21 | 2005-11-24 | Valeo, Inc. | Multi-type fins for multi-exchangers |
| KR20110075143A (en) * | 2009-12-28 | 2011-07-06 | 한라공조주식회사 | The heat exchanger |
| CN102679790A (en) * | 2012-06-05 | 2012-09-19 | 金龙精密铜管集团股份有限公司 | Enhanced condensation heat transfer tube |
| CN203719501U (en) * | 2013-12-27 | 2014-07-16 | 无锡佳龙换热器股份有限公司 | Efficient fin |
| CN108151573A (en) * | 2017-12-22 | 2018-06-12 | 河南百年融熥实业有限公司 | A kind of annulus fin heat exchange pipe |
| CN112254566A (en) * | 2017-08-02 | 2021-01-22 | 青岛金玉大商贸有限公司 | Gas-liquid two-phase flow heat exchange tube with variable fin size |
-
2021
- 2021-11-15 CN CN202111344338.5A patent/CN114152119B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041672A (en) * | 1999-08-02 | 2001-02-16 | Furukawa Electric Co Ltd:The | Heating tube with grooved inner surface and fin machining roll therefor |
| US20050257921A1 (en) * | 2004-05-21 | 2005-11-24 | Valeo, Inc. | Multi-type fins for multi-exchangers |
| KR20110075143A (en) * | 2009-12-28 | 2011-07-06 | 한라공조주식회사 | The heat exchanger |
| CN102679790A (en) * | 2012-06-05 | 2012-09-19 | 金龙精密铜管集团股份有限公司 | Enhanced condensation heat transfer tube |
| CN203719501U (en) * | 2013-12-27 | 2014-07-16 | 无锡佳龙换热器股份有限公司 | Efficient fin |
| CN112254566A (en) * | 2017-08-02 | 2021-01-22 | 青岛金玉大商贸有限公司 | Gas-liquid two-phase flow heat exchange tube with variable fin size |
| CN108151573A (en) * | 2017-12-22 | 2018-06-12 | 河南百年融熥实业有限公司 | A kind of annulus fin heat exchange pipe |
Non-Patent Citations (1)
| Title |
|---|
| 王振波: "《分布式能源技术与应用》", 上海交通大学出版社, pages: 430 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114152119B (en) | 2024-04-09 |
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