CN220871535U - Radial heat pipe and heat exchanger capable of improving heat transfer performance - Google Patents
Radial heat pipe and heat exchanger capable of improving heat transfer performance Download PDFInfo
- Publication number
- CN220871535U CN220871535U CN202322601647.7U CN202322601647U CN220871535U CN 220871535 U CN220871535 U CN 220871535U CN 202322601647 U CN202322601647 U CN 202322601647U CN 220871535 U CN220871535 U CN 220871535U
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- heat
- pipe
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- tube
- heat pipe
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- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims description 3
- 239000011796 hollow space material Substances 0.000 claims 1
- 238000009736 wetting Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a radial heat pipe and a heat exchanger for improving heat transfer performance. The existing radial heat pipe is difficult to wet the upper part of the inner side of the outer pipe, so that the top heat transfer is not ideal. The utility model comprises an outer tube, an inner tube is inserted into the outer tube, and the two ends of the outer tube are sealed by end covers, the inner tube extends out of the end covers, an annular sealing space is formed between the inner tube and the outer tube, the annular space is vacuumized and injected with a certain amount of liquid working medium, horizontal wings are welded on two sides of the inner tube, and a gap is formed between the horizontal wings and the inner wall of the outer tube. The utility model also discloses a heat exchanger formed by the radial heat pipes. The utility model improves the circulation of the working medium in the heat pipe, and increases the wetting area of the working medium liquid film, thereby improving the heat transfer performance of the radial heat pipe.
Description
Technical Field
The utility model relates to the technical field of heat pipe heat exchange elements, in particular to a radial heat pipe and a heat exchanger for improving heat transfer performance.
Technical Field
The heat pipe is a heat exchange element with extremely strong axial heat transfer capability, and the heat exchanger manufactured by the heat pipe has the advantages of high heat transfer coefficient, small flow resistance, compact structure, controllable wall temperature and no fluid leakage mixing risk, so that the heat pipe has extremely wide application on heat exchanger equipment. The heat pipes are various and classified according to heat transfer directions, and the heat pipes comprise axial heat pipes and radial heat pipes; the heat pipes are classified according to the circulation of working medium, and are heat absorption core heat pipes, gravity heat pipes, annular heat pipes and the like.
The radial heat pipe is particularly suitable for high-capacity gas-water heat exchange equipment, is flexible in installation and arrangement, can flow in the gas side in the horizontal direction and in the vertical direction, particularly has uniform surface temperature of the heat pipe, can be controlled above the acid dew point or the water dew point temperature, and can avoid corrosion and wet ash pasting on the surface of the heat pipe, so that the radial heat pipe becomes an ideal choice in the field of low-temperature waste heat recovery, such as a low-temperature economizer of a boiler, a medium type gas-gas heat exchanger and the like.
The radial heat pipes are horizontally arranged and are composed of an outer pipe, an inner pipe, a vacuum annular space with two closed ends and a phase change working medium in the annular space. The heat transfer process is as follows: the outer tube absorbs heat of the gas, evaporates the liquid film on the inner side of the outer tube, and the steam flows along the radial direction, condenses on the outer surface of the inner tube, and heats the liquid in the inner tube.
The main problem of the radial heat pipe is that the inner side of the outer pipe is generally not provided with a liquid suction core, so that the liquid working medium in the annular space is difficult to wet the upper part of the inner side of the outer pipe, and the top heat transfer is not ideal. The inner tube can be eccentrically arranged and arranged as far as possible to increase the capacity of the liquid pool at the bottom and improve the wetting height, but the eccentric distance is limited and the heat transfer improvement is not obvious.
If a wick is used, however, it is too costly and difficult to install within a long tube. Therefore, the radial heat pipe heat exchanger overcomes the defect of heat transfer effect by increasing the heat exchange area, and besides the liquid suction core, no better method for improving the heat transfer performance of the radial heat pipe exists.
Disclosure of Invention
In order to solve the heat transfer performance of the radial heat pipe, the utility model provides the radial heat pipe for improving the heat transfer performance, which can better wet the inner surface of the outer pipe of the heat pipe and improve the heat exchange effect of the radial heat pipe under the condition of low increase of cost.
Therefore, the utility model adopts the following technical scheme: the radial heat pipe is characterized in that two ends of the outer pipe are sealed through end covers, the inner pipe extends out of the end covers, an annular sealing space is formed between the inner pipe and the outer pipe, the annular space is vacuumized and filled with a certain amount of liquid working medium, horizontal wings are welded on two sides of the inner pipe, and a gap is formed between the horizontal wings and the inner wall of the outer pipe.
According to the technical scheme, the radial heat pipe is horizontally arranged in the heat exchanger, the hot air flows transversely across the outer side of the radial heat pipe, the heated cold fluid flows along the inner side of the inner pipe, the liquid working medium in the annular space absorbs heat of the hot air and then boils and evaporates, the steam-water volume is increased, the pressure is increased, a working medium steam-water mixture is sprayed upwards from a gap between the horizontal wing and the outer pipe, the upper part of the inner side of the outer pipe is wetted, the liquid film is evaporated at the upper part, the working medium steam condenses at the lower part of the inner pipe wall at a low temperature to form a liquid film flowing along the outer surface of the inner pipe, and flows back to the bottom liquid pool along the gap between the horizontal wing and the outer pipe, part of the liquid film is carried by the sprayed steam and is sputtered to the upper part of the inner side of the outer pipe and re-evaporated, so that circulation is not completed, and external heat is transferred to the cold fluid inside.
Preferably, the horizontal wings are metal sheets, and the width of the horizontal wings is larger than half of the distance between the inner tube and the outer tube.
Preferably, the outer tube is an oval tube or a round tube.
Preferably, the radial heat pipe is horizontally installed in the heat exchanger.
Preferably, the outer surface of the radial heat pipe can be welded with transverse and longitudinal fins or light pipes.
The utility model also discloses a heat exchanger, which comprises a shell and the radial heat pipes.
Preferably, the inner tubes of the radial heat pipes exposed out of the shell are connected together through bends to form a layer of heat exchange tube group, and the heat exchanger comprises a plurality of layers of heat exchange tube groups which are connected in parallel.
The utility model has the beneficial effects that: the circulation of working medium in the heat pipe is improved, the wetting area of the working medium liquid film is increased, and the heat transfer performance of the radial heat pipe is improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a section A-A of fig. 1.
Fig. 3 is a schematic top view of a heat exchanger assembled by the present utility model.
In the accompanying drawings: 1. inner tube 2, end cover 3, outer tube 4, horizontal wing 5, working medium 6, elbow 7 and shell.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
A radial heat pipe for improving heat transfer performance as shown in fig. 1 and 2 comprises an inner pipe 1, an end cover 2, an outer pipe 3, horizontal fins 4 and a liquid working medium 5.
Two horizontal wings are welded on two sides of the inner tube and inserted into the outer tube, and the two ends are sealed by end covers to form an annular closed space, and the inner tube extends out of the end covers. The annular space is vacuumized, and a certain amount of liquid working medium is injected.
The horizontal wings are metal sheets, and the width of the horizontal wings is larger than half of the distance between the inner tube and the outer tube. The outer tube is an elliptical tube or a circular tube.
Fig. 3 shows a schematic structural diagram of a heat exchanger device according to the utility model, comprising a housing 7 in which a plurality of radial heat pipes according to fig. 1 are arranged. The inner tubes of the radial heat pipes are connected together through an elbow 6 to form a layer of heat exchange tube group, and the heat exchanger comprises a plurality of layers of heat exchange tube groups which are connected in parallel.
When the utility model works, the hot air flows transversely pass through the radial heat pipe group, and the liquid working medium in the annular space of the radial heat pipe group is heated, so that the working medium is boiled and evaporated. The pressure of the annular space at the lower part is increased after boiling, the steam-water mixture is sprayed out from the gap between the horizontal wing and the outer tube, and the inner surface at the upper part of the outer tube is wetted by sputtering, so that a liquid film on the wetted surface is heated and evaporated. The steam flows radially, condenses on the outer surface of the inner tube and flows down the surface to the edges of the horizontal fins where the gap between the fin edges and the outer tube meets the injected steam, a portion of which is carried over to resputtered to the upper surface of the outer tube and a portion of which returns to the pool below the annular space for re-evaporation, thus circulating more than once, transferring the heat from the hot gas stream of the outer tube to the heated fluid within the inner tube.
The inner pipes of the radial heat pipes are connected together through elbows to form a layer of heat exchange pipe; and a plurality of layers of heat exchange pipes are connected in parallel to form heat exchanger equipment, so that the heating of the fluid in the pipes by external airflow is realized.
The utility model strengthens the heat transfer of the radial heat pipe and improves the heat transfer efficiency of the heat exchanger device by increasing the wetting area of the liquid working medium.
The above is only a specific embodiment example of the present utility model, and the present utility model is not limited to the above embodiment example, but many similar structural variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.
Claims (6)
1. A radial heat pipe for improving heat transfer performance comprises an outer pipe (3), an inner pipe (1) is inserted into the outer pipe (3),
It is characterized in that the two ends of the outer tube (3) are closed by end covers (2), and the inner tube (1) extends out of the end covers (2)
Besides, an annular closed space is formed between the inner tube (1) and the outer tube (3), and the inside of the annular closed space is evacuated
The liquid working medium (5) is injected into the hollow space, and the two sides of the inner pipe (1) are welded with horizontal wings (4) which are welded with each other
(4) And a gap is formed between the inner wall of the outer tube (3).
2. A radial heat pipe having improved heat transfer performance as recited in claim 1, wherein said level
The wings (4) are metal sheets, and the width of the horizontal wings (4) is larger than half of the distance between the inner tube and the outer tube.
3. A radial heat pipe having improved heat transfer performance as claimed in claim 1 or 2, wherein said radial heat pipe comprises
The outer tube (3) is an elliptical tube or a circular tube.
4. A radial heat pipe having improved heat transfer performance as recited in claim 1, wherein said radial direction
The heat pipe is horizontally arranged in the heat exchanger.
5. A heat exchanger comprising a housing (7), characterized in that a plurality of heat exchangers according to claims 1-4 are arranged in said housing
Any one of the radial heat pipes.
6. A heat exchanger according to claim 5, characterized in that the inner tube (1) of the radial heat pipe is open
The passing elbow (6) is connected together to form a layer of heat exchange tube group, and the heat exchanger comprises a plurality of layers of heat exchange tubes connected in parallel
A tube group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322601647.7U CN220871535U (en) | 2023-09-25 | 2023-09-25 | Radial heat pipe and heat exchanger capable of improving heat transfer performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322601647.7U CN220871535U (en) | 2023-09-25 | 2023-09-25 | Radial heat pipe and heat exchanger capable of improving heat transfer performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220871535U true CN220871535U (en) | 2024-04-30 |
Family
ID=90810452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322601647.7U Active CN220871535U (en) | 2023-09-25 | 2023-09-25 | Radial heat pipe and heat exchanger capable of improving heat transfer performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220871535U (en) |
-
2023
- 2023-09-25 CN CN202322601647.7U patent/CN220871535U/en active Active
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