CN207832005U - Falling film heat transfer pipe and its arrangement in heat exchanger - Google Patents
Falling film heat transfer pipe and its arrangement in heat exchanger Download PDFInfo
- Publication number
- CN207832005U CN207832005U CN201721847200.6U CN201721847200U CN207832005U CN 207832005 U CN207832005 U CN 207832005U CN 201721847200 U CN201721847200 U CN 201721847200U CN 207832005 U CN207832005 U CN 207832005U
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- Prior art keywords
- tube body
- groove
- heat transfer
- falling film
- transfer pipe
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Abstract
The utility model is related to a kind of Falling film heat transfer pipe and its arrangement in heat exchanger, including tube body, the outer surface of tube body is circumferentially provided with several grooves, and several grooves are uniformly distributed along the length direction of tube body, and the inner surface of tube body is equipped with screw thread.Several tube bodies are set to the lower section of liquid distributor, and the groove of the tube body of topmost is located between the adjacent spray port of liquid distributor, the groove interlaced arrangement between adjacent tubes.The utility model improves guide performance, reduces fluid winding flow resistance by the optimization of exchange heat pipe structure, keeps fluid film forming thinner, and drain age velocity faster, increases the heat exchange area in unit section, improving heat exchanging efficiency.
Description
Technical field
The utility model belongs to the technical field of falling film evaporating heat exchange tube, more particularly to a kind of Falling film heat transfer pipe and its
Arrangement in heat exchanger.
Background technology
Circular cross-section Falling film heat transfer pipe is in heat supply, refrigeration air-conditioner, domestic hot-water, food production, technique, recuperation of heat, nature
The fields such as the energy, power plant are widely used.But there are the following problems for circular cross-section Falling film heat transfer pipe：It is changed due to being skipped at membrane fluid
Boundary layer separation occurs for half tube section of heat pipe, and bottom is caused to form wider Disengagement zone so that fluid is detached from heat-transfer pipe wall surface, makes
It is poor at heat-transfer effect, form drag is big, or even cause vortex-induced vibration destroy heat exchanger tube, cannot meet in many cases production section
Energy and specific demand.
Screwed pipe is as a kind of efficient energy saving component in the fields extensive use such as power, space flight, electronics.For single-phase
The convection current heat transfer of fluid, the groove of spiral shape inner surface and raised enhanced heat exchange pipe internal surface, reinforces flow disturbance, moisture film is more
Persistently.In addition, screw thread causes the rotation of fluid, Secondary Flow is generated in the duct and increases turbulence intensity, fluid radial velocity is made to increase
Add and boundary layer is thinning, generates prodigious centrifugal force, the higher liquid of density in two phase flow is made to rush at wall surface, the lower vapour of density
Body then accumulates to pipeline center, its coefficient of heat transfer is bigger than light pipe under the same conditions, and compared to other shape tubes, spiral shell
Line pipe is simple to manufacture, and heat transfer property and mechanical performance are more preferable.It is being passed in addition, semi-elliptical cross-section structure can effectively reduce into membrane fluid
The vortex of the Disengagement zone and fluid tail portion of heat pipe bottom increases the heat exchange area of unit section, reduces fluid winding flow resistance, makes
Fluid film forming is thinner, and faster, improving heat exchanging efficiency is energy saving for drain age velocity.
Invention content
The technical problem to be solved by the utility model is to provide a kind of Falling film heat transfer pipe and its arrangements in heat exchanger
Structure improves heat exchanger tube guide performance, reduces spray liquid being unevenly distributed on pipe range direction, improving heat exchanging efficiency.
Technical solution adopted by the utility model to solve its technical problems is provide a kind of Falling film heat transfer pipe, including pipe
The outer surface of body, the tube body is circumferentially provided with several grooves, and several grooves are uniformly distributed along the length direction of tube body, institute
The inner surface for stating tube body is equipped with screw thread.
The top half semicircular in shape in the tube body section, lower half portion are in half elliptic.
Technical solution adopted by the utility model to solve its technical problems is a kind of Falling film heat transfer pipes of offer in heat exchanger
Interior arrangement, several tube bodies are set to the lower section of liquid distributor, and the groove of the tube body of topmost is located at the adjacent spray of liquid distributor
Between mouthful, the groove interlaced arrangement between adjacent tubes.
The groove of the tube body of lowest part is located between adjacent two groove of topmost tube body.
The groove of the tube body of the topmost is located at the middle position of the adjacent spray port of liquid distributor.
Advantageous effect
In the present invention, it is provided with screw thread using inner surface, reeded heat exchanger tube is opened to replace interior appearance in outer surface
The smooth traditional heat exchanger tube in face.For fluid in screw thread Bottomhole pressure, the spiral protrusion of inner surface makes the laminar flow medium of transition region
Periodically disturbance is generated, the disturbance of fluid particle in boundary layer is caused, becomes disorderly turbulence state.When fluid is by next
Have when a boss and generate new vortex, and the vortex flow direction, always perpendicular to the flow direction of laminar flow medium, this is just
So that the flow regime of transition region is changed, thermal resistance becomes smaller, and rate of heat transfer improves.
On the other hand, it when fluid flows through pipe outer wall, is guided by pipe outer wall upper groove, water conservancy diversion can be conducive to, reduce confluence
Liquid bias current, to prevent lower layer's heat exchanging part from being infiltrated without spray liquid, and to spray liquid film blocked up for part, and then saves spray liquid, surely
Determine heat transfer effect.Also, external groove makes the heat exchange area of heat exchanger tube increase, and can improve overall heat-transfer coefficient.
Further, since semiellipse heat exchanger tube in falling liquid film, is managed, outer liquid is uneven in pipe range directional spreding, and there are classes for liquid level
The phenomenon of the wave crest protrusion of wave function is similar to, and adjacent two heat exchanger tube is formed by confluence wave crest staggeredly phenomenon, so this reality
With the groove interlaced arrangement of adjacent two heat exchanger tubes in novel, spray liquid is allow to be fully utilized.
The utility model improves the guide performance of heat exchanger tube, reduces fluid winding flow resistance, keeps fluid film forming thinner, row
Liquid speed degree faster, increases the heat exchange area in unit section, improving heat exchanging efficiency.
Description of the drawings
Fig. 1 is the axial section structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram that the utility model is arranged in heat exchanger.
Specific implementation mode
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction
Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen
It please the appended claims limited range.
A kind of Falling film heat transfer pipe as shown in Figure 1, including tube body 1.The top half semicircular in shape in 1 section of tube body, lower half
Part is in half elliptic.
The outer surface of tube body 1 is circumferentially provided with several grooves 2, and several grooves 2 are uniformly distributed along the length direction of tube body 1,
The inner surface of tube body 1 is equipped with screw thread 3.
A kind of arrangement of Falling film heat transfer pipe as shown in Figure 2 in heat exchanger, several tube bodies 1 are set to liquid distributor 4
Lower section.Since ejecting liquid is unevenly distributed in 1 length direction of tube body, liquid level deposits the phenomenon of protrusion, and adjacent two heat exchanger tube
Being formed by confluence wave crest has staggeredly phenomenon.The groove 2 of the tube body 1 of topmost is located to the center of the adjacent spray port of liquid distributor 5
Between position, 2 interlaced arrangement of groove between adjacent tubes 1, the groove 2 of the tube body 1 of lowest part is located at the adjacent of topmost tube body 1
The centre of two grooves 2 so that the outer liquid of pipe is evenly distributed in 1 length direction of tube body.
The Falling film heat transfer pipe improves guide performance by the optimization to structure, reduces fluid winding flow resistance, makes fluid
Film forming is thinner, and drain age velocity faster, increases the heat exchange area in unit section, improving heat exchanging efficiency.
Claims (5)
1. a kind of Falling film heat transfer pipe, including tube body (1), it is characterised in that：The outer surface of the tube body (1) is circumferentially provided with several
Groove (2), several grooves (2) are uniformly distributed along the length direction of tube body (1), and the inner surface of the tube body (1) is equipped with spiral shell
Line (3).
2. a kind of Falling film heat transfer pipe according to claim 1, it is characterised in that：The top half in tube body (1) section
Semicircular in shape, lower half portion are in half elliptic.
3. a kind of arrangement of Falling film heat transfer pipe as claimed in claim 1 or 2 in heat exchanger, several tube bodies (1) are set to
The lower section of liquid distributor (4), it is characterised in that：The groove (2) of the tube body (1) of topmost be located at the adjacent spray port of liquid distributor (5) it
Between, groove (2) interlaced arrangement between adjacent tubes (1).
4. arrangement of the Falling film heat transfer pipe according to claim 3 in heat exchanger, it is characterised in that：The pipe of lowest part
The groove (2) of body (1) is located between adjacent two groove (2) of topmost tube body (1).
5. arrangement of the Falling film heat transfer pipe according to claim 3 in heat exchanger, it is characterised in that：The topmost
The groove (2) of tube body (1) be located at the middle position of the adjacent spray port of liquid distributor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721847200.6U CN207832005U (en) | 2017-12-26 | 2017-12-26 | Falling film heat transfer pipe and its arrangement in heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721847200.6U CN207832005U (en) | 2017-12-26 | 2017-12-26 | Falling film heat transfer pipe and its arrangement in heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207832005U true CN207832005U (en) | 2018-09-07 |
Family
ID=63389502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721847200.6U Expired - Fee Related CN207832005U (en) | 2017-12-26 | 2017-12-26 | Falling film heat transfer pipe and its arrangement in heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207832005U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405354A (en) * | 2018-11-19 | 2019-03-01 | 珠海格力电器股份有限公司 | Falling film type heat exchanger and air conditioning unit |
-
2017
- 2017-12-26 CN CN201721847200.6U patent/CN207832005U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405354A (en) * | 2018-11-19 | 2019-03-01 | 珠海格力电器股份有限公司 | Falling film type heat exchanger and air conditioning unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180907 Termination date: 20181226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |