CN102735089A - Heat transfer pipe, and heat and mass transfer equipment having heat transfer pipe - Google Patents
Heat transfer pipe, and heat and mass transfer equipment having heat transfer pipe Download PDFInfo
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- CN102735089A CN102735089A CN201110084362XA CN201110084362A CN102735089A CN 102735089 A CN102735089 A CN 102735089A CN 201110084362X A CN201110084362X A CN 201110084362XA CN 201110084362 A CN201110084362 A CN 201110084362A CN 102735089 A CN102735089 A CN 102735089A
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- heat
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- 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
- F28F1/08—Tubular elements crimped or corrugated in longitudinal section
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Abstract
The invention provides a heat transfer pipe, and heat and mass transfer equipment having the heat transfer pipe. The heat transfer pipe comprises: two heat transfer pipe joints (11), which are respectively arranged on the two sides of the heat transfer pipe; and a twisted pipe body (12), which is arranged between the two heat transfer pipe joints (11) to connect the two heat transfer pipe joints (11) and has a twisted surface pipe structure. With the heat transfer pipe of the invention, the heat and mass transfer in an evaporation process can be strengthened, heat transfer coefficients of natural convection and forced convection inside and outside the pipe are at the same time improved, and manufacturing cost of an evaporator is reduced.
Description
Technical field
The present invention relates to the vaporizer technology field, in particular to a kind of heat-transfer pipe and comprise the heat and mass equipment of this heat-transfer pipe.
Background technology
The energy is the important substance basis of economic growth and social progress, with three big pillars of material, information formation modernized society.The energy is not only the power of the national economic development, and is the index of weighing overall national strength and living standards of the people and national civilized development degree.Industries such as oil, chemical industry, power, metallurgy, refrigeration are the pillar industries of China, also are the conventional industries of high energy consumption, and its energy consumption accounts for 40% of total energy consumption.In these high energy consumption industry, the height of heat exchanger heat-transfer performance directly affects the energy consumption level of industrial system.In various dissimilar heat exchangers, shell and tube exchanger is simple because of making, cost is low, applicability is strong and advantage such as convenient operating maintenance is used the most general.Yet the shell and tube exchanger of China's industrial system use at present is to adopt traditional circular smooth surface heat transfer pipe more than 90%.This type of heat exchanger volume is huge, material consumption energy consumption many, procedures system is also high, demands urgently improving.Exploring new enhanced heat transfer mechanism and develop augmentation of heat transfer technology efficiently, is the some effective that improves heat exchanger heat transfer usefulness, and this remains the hot research problem in current thermal conduction study field.
Evaporation is common operating process in the above-mentioned high energy consumption industry, and the heat transfer of raising evaporimeter and evaporation efficiency are for reducing equipment investment with energy-saving and cost-reducing all significant.The evaporimeter that uses in the industry has polytype, and modal be tube shell type structure, the heat-transfer pipe that is adopted is mainly plain tube.The boiling heat transfer coefficient of plain tube is very low, thereby causes the heat transfer property of evaporimeter low, and heat exchanger volume is huge, and cost is high.The degree of superheat of smooth surface is higher in addition, and critical thermal load is low, and the operating space is narrow, evaporation process stable wayward.
Summary of the invention
The present invention aims to provide a kind of heat-transfer pipe and comprises the heat and mass equipment of this heat-transfer pipe, and is low with plain tube boiling heat transfer coefficient in the solution prior art, thereby causes the heat transfer property of evaporimeter low, and heat exchanger volume is huge, the cost problem of higher.
To achieve these goals, according to an aspect of the present invention, a kind of heat-transfer pipe is provided, has comprised: two sections heat-transfer pipe joints are separately positioned on the heat-transfer pipe two ends; The distortion body is arranged in the middle of two sections heat-transfer pipe joints, connects two sections heat-transfer pipe joints, and has the surface pipe body structure of distortion.
Further, the distortion body has helically twisted surface pipe body structure.
Further, helically twisted surface pipe body structure is a single-screw skewed surface pipe structure.
Further, the cross section profile of helically twisted surface pipe body structure is oval.
Further, the distortion body of heat-transfer pipe has the surface pipe body structure variation of following the distortion body and the inner-walls of duct that changes.
Further, the outer wall of heat-transfer pipe has loose structure.
Further, the loose structure on the outer wall of heat-transfer pipe comprises a plurality of apertures that are provided with along the heat-transfer pipe radial direction, and in axial direction follows the structural change of outer wall and the tunnel that changes, and aperture is connected with the tunnel.
Further, aperture arranging on axial direction follow heat-transfer pipe outer wall structural change and change.
Further, the tunnel has the radial section that in axial direction constantly changes.
According to a further aspect in the invention, a kind of heat and mass equipment is provided, has comprised above-mentioned heat-transfer pipe.
According to technical scheme of the present invention, heat-transfer pipe comprises heat-transfer pipe joint that is arranged on its two ends and the distortion body that is connected two sections heat-transfer pipe joints, and this distortion body has the surface pipe body structure of distortion.When flow of liquid during through heat-transfer pipe outer surface of the present invention; The surface pipe body structure of distortion makes liquid produce swirling flow and separated flow; Destroyed the stability of medium heat transfer boundary layer, attenuate the thickness of medium heat transfer detention layer, improved the convection transfer rate of evaporation heat transfer tube outer surface.The outer wall of heat-transfer pipe is provided with loose structure, and sufficient artificial activation core is provided, and has improved the boiling heat transfer coefficient of heat-transfer pipe outer surface.Simultaneously, when medium flowed in heat-transfer pipe, the passage that the spiral that the distortion body causes changes also made the flow through liquid of inner surface of tube body produce swirling flow and separated flow and improve the convection transfer rate in the heat-transfer pipe.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of heat-transfer pipe according to an embodiment of the invention;
Fig. 2 shows the sectional view according to the A place of Fig. 1;
Fig. 3 shows the sectional view according to the B place of Fig. 1;
Fig. 4 shows the sectional view according to the C place of Fig. 1;
Fig. 5 shows the sectional view according to the D place of Fig. 1;
Fig. 6 shows the sectional view according to the E place of Fig. 1; And
Fig. 7 shows according to the part of the outer tube wall at the F place of Fig. 1 and amplifies three-dimensional sectional structure sketch map.
The specific embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Extremely shown in Figure 6 like Fig. 1; According to embodiments of the invention; Heat-transfer pipe comprises two sections heat-transfer pipe joints 11 that are arranged on the heat-transfer pipe two ends; And be arranged between two sections heat-transfer pipe joints 11, and connecting the distortion body 12 of two sections heat-transfer pipe joints 11, this distortion body 12 has the surface pipe body structure of distortion.Two sections heat-transfer pipe joints 11 can be integrated with distortion body 12, also can have the multistage body to combine.The surface pipe body structure of the fluctuating of distortion body 12 can be the surface pipe body structure that in axial direction twists, and also can be the surface pipe body structure that in axial direction fluctuates up and down.In the present embodiment, distortion body 12 has helically twisted surface pipe body structure, and heat-transfer pipe joint 11 is the circular body in smooth pipe road for interior conduit.
The heat-transfer pipe joint 11 at heat-transfer pipe two ends is ganoid round tube body structure; Its length is shorter; Interior conduit also is circular, and this circular body makes the mouth of pipe position at two ends of heat-transfer pipe process easily, can according to the structure that will connect transform the end of circular body as corresponding with it syndeton; Easy to use, applicability is stronger.
The distortion body 12 of heat-transfer pipe mid portion is the major part of the heat-transfer pipe of present embodiment, on heat-transfer pipe, has occupied most length; The distorted-structure that it is surperficial; After making that heat-transfer pipe is installed and used,, can produce separated flow owing to the fluctuating of its surface texture when flow of liquid during through the heat-transfer pipe outer surface; Destroy the medium heat transfer boundary layer stability; The thickness of attenuate medium heat transfer detention layer improves the convection transfer rate of evaporation heat transfer tube outer surface, thereby improves the operating efficiency of heat-transfer pipe.And has the distortion body 12 of helically twisted surface pipe body structure; Make liquid when tube surface flows, can form periodic swirling flow and separated flow, further reduce the adhesion of liquid at outer surface of tube body along with helically twisted surface; Improve the heat exchange efficiency of medium in liquid and the heat-transfer pipe; Improve the interior convection transfer rate of pipe of heat exchanger tube, effectively prevent the degree of superheat problem of higher on body surface, make evaporation process be more prone to control.
In the present embodiment, distortion body 12 is a single-screw skewed surface pipe structure, can directly form through mechanical stitch through the mid portion to circular body; And can so that the round tube body in circular pipe in the mechanism of mechanical stitch; The corresponding variation takes place in the structural change of following outer surface of tube body, makes the inside and outside body of single-screw distortion body all form the structure of distortion, and procedure is simple; Realize easily, and can have good effect.
From Fig. 1 to Fig. 6, it can also be seen that, the heat-transfer pipe of present embodiment, the cross section profile of the helically twisted surface pipe body structure of distortion body 12 is oval, and in axial direction demonstrates the oval body of different angles.Distortion body 12 is helically twisted oval body, can be processed to form through mechanical stitch, and technology is simple, can effectively reduce the cost of processing distortion body 12, and can directly obtain through the circular body of processing, has bigger applicability.The distortion body 12 of present embodiment is to adopt the mechanical stitch post forming to obtain, and does not have the cutting to metal in the process, and stock utilization is higher.
The cross section profile of distortion body 12 can also can form this condition of helically twisted pipe structure as long as it satisfies for square, cydariform or other multiple shape, can be as the cross section profile of distortion body 12.Helically twisted structure can be the single-screw distorted-structure, also can be the double helix distorted-structure.The processing of single-screw distorted-structure is simple, easy to manufacture, and large-scale application is more easy to implement easily, can effectively practice thrift cost.The double helix distorted-structure makes the body surface of heat-transfer pipe form more periodic swirling flow and separated flow, more effectively reduces the adhesion of liquid at outer surface of tube body, prevents the degree of superheat problem of higher on body surface.
The interior conduit of distortion body 12 can be the smooth structure identical with the interior conduit of heat-transfer pipe joint 11, also can be non-smooth inner wall surface structure.Preferably; The distortion body 12 of heat-transfer pipe has the inner-walls of duct structure of following its surface pipe body structure variation and changing; So that add man-hour at outer surface structure to heat-transfer pipe; The interior conduit that also can make heat-transfer pipe produces corresponding variation according to the structural change of outer surface, reduces the interior conduit difficulty of processing.In the present embodiment; The interior conduit of distortion body 12 is to follow the helically twisted oval pipeline that its outer wall changes; When MEDIA FLOW during through the interior conduit of heat exchanger tube, the helical surface structure that also can follow interior conduit produces periodic swirling flow and separated flow, thereby can reduce the adhesion of liquid to inner tubal wall; Improve medium and the heat exchange of managing outer liquid in the pipe, further improve the heat exchange efficiency of heat exchanger tube.
As can be seen from Figure 7, according to heat-transfer pipe of the present invention, its outer wall 20 has loose structure, and loose structure can provide sufficient artificial activation core for heat exchanger tube, improves the boiling heat transfer coefficient of heat-transfer pipe outer surface.Loose structure on the heat-transfer pipe outer wall 20 comprises a plurality of apertures 21 that are provided with along the heat-transfer pipe radial direction, and in axial direction follows the structural change of outer wall 20 and the tunnel 22 that changes.Aperture 21 arranging on axial direction follow heat-transfer pipe outer wall 20 structural change and change.Tunnel 22 is arranged on the outer surface below of outer wall 20, and is positioned at the bottom of aperture 21, links together being located axially at same the aperture 21 on the change curve.When liquid from heat exchange pipe external surface through out-of-date, can get in the loose structure on the outer wall 20, aperture 21 has limited the amount that liquid gets into tunnel 22, makes the required heat transmission resistance that overcomes of explosive evaporation to reduce.After the gas that evaporation produces was overflowed from contiguous aperture 21, outside liquid was replenished by aperture 21 entering tunnels 22 at once, and proceeds evaporation process, constantly carries out the evaporation process of repetition then, thereby improved the boiling heat transfer coefficient of heat-transfer pipe outer surface.
In conjunction with referring to Fig. 1, aperture 21 can be the aperture of circular hole, square hole, elliptical aperture, delthyrium, diamond hole or other shape, and each aperture is all along the radial direction setting of distortion body 12.When flow of liquid during through the heat-transfer pipe outer surface; Meeting is through these aperture 21 entering tunnels 22, and heat absorption evaporation in the tunnel, and the gas of evaporation generation is overflowed from contiguous aperture 21; Outside liquid replenishes through liquid in 21 pairs of tunnels of aperture again, makes liquid heat absorption and evaporation fast.In the present embodiment, aperture 21 is the hole that a kind of opening becomes sealene triangle, and hole is along tube axial direction shape arrangement in the shape of a spiral.
The cross section in tunnel 22 can be circular, square, oval, triangle, rhombus or other shape, and on axial direction, aperture is communicated with, and makes the liquid that gets in the aperture heat exchange effect more fully to be arranged with heat exchanger tube.Preferably, tunnel 22 in axial direction has the radial section of continuous variation.In the present embodiment; The one side sidewall in tunnel 22 is a smooth surface; The opposing sidewalls of opposite side has the wall structure of fluctuating, thereby makes the runner in tunnel 22 form irregular flow path, makes to have flow regime more fully from the liquid in aperture entering tunnel 22.
The selection of the distance between the aperture 21 and the size of aperture can be so that heat-transfer pipe be applied to different heat and mass equipment.
When the hole center distance of two adjacent apertures 21 is 0.8mm, the aperture is 0.08mm, and hole is when shape is arranged in the shape of a spiral along tube axial direction, and this kind heat-transfer pipe can be used for central air-conditioning unit flooded evaporator.
When the hole center distance of two adjacent apertures 21 is 2.0mm, the aperture is 1.0mm, and hole is when shape is arranged in the shape of a spiral along tube axial direction, and this kind heat-transfer pipe can be used for the thermosiphon reboiler of petrochemical industry.
Heat and mass equipment comprises above-mentioned heat-transfer pipe according to an embodiment of the invention.This heat-transfer pipe is mainly used in the horizontal-type evaporator of the heat and mass equipment in the industry such as food processing, metallurgy, desalinization, petrochemical industry, refrigeration air-conditioner.
According to the operation principle of heat-transfer pipe the course of work of the heat-transfer pipe of present embodiment is explained below.
When flow of liquid through according to efficient heat transfer tube outer surface according to the present invention the time; The tube surface of distortion makes the liquid that flows through form periodic swirling flow and separated flow; Destroy the stability of medium heat transfer boundary layer; The thickness of attenuate medium heat transfer detention layer, thereby the convection transfer rate of raising evaporation heat transfer tube outer surface.Tube surface ground loose structure is that heat-transfer pipe provides sufficient artificial activation core, has improved the boiling heat transfer coefficient of heat-transfer pipe outer surface.
On the other hand, when the medium of heating flowed in efficient heat conducting tube, the oval passage that spiral changes made medium also can produce swirling flow and separated flow, to improve the convection transfer rate in the heat-transfer pipe.Since the heat transfer property of evaporimeter by in the pipe, decisions such as heat transfer outside a tube coefficient and sealing factor; Not only improved the outer heat transfer coefficient of evaporator tube according to heat-transfer pipe of the present invention; Also improve simultaneously the heat transfer coefficient in the pipe, made the overall heat-transfer coefficient of evaporimeter significantly improve.Therefore, adopt the high-efficiency evaporating heat-transfer pipe of same heat exchange area, can reduce the heat transfer area of evaporimeter greatly, reduce the volume of evaporimeter, reduce and make and operating cost.
From above description, can find out that the above embodiments of the present invention have realized following technique effect: improved the heat and mass transfer performance of evaporimeter, compared, can improve evaporimeter overall heat-transfer coefficient 15%-30% with existing machinery finished surface porous heat transfer tube.A large amount of artificial gasification cores can be provided, strengthen the evaporation heat transfer mass transport process, also can improve in the heat-transfer pipe simultaneously and the outer convective heat transfer liquid coefficient of heat-transfer pipe, strengthen free convection and forced-convection heat transfer, further improve the heat exchange efficiency of evaporimeter.Simple in structure, adopt the mechanical stitch post forming, there is not cutting in the process to metal, stock utilization is high.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a heat-transfer pipe is characterized in that, comprising:
Two sections heat-transfer pipe joints (11) are separately positioned on said heat-transfer pipe two ends;
Distortion body (12) is arranged in the middle of two sections said heat-transfer pipe joints (11), connects two sections said heat-transfer pipe joints (11), and has the surface pipe body structure of distortion.
2. heat-transfer pipe according to claim 1 is characterized in that, the surface pipe body structure of said distortion body (12) is helically twisted surface pipe body structure.
3. heat-transfer pipe according to claim 2 is characterized in that, said helically twisted surface pipe body structure is a single-screw skewed surface pipe structure.
4. heat-transfer pipe according to claim 2 is characterized in that, the cross section profile of said helically twisted surface pipe body structure is oval.
5. according to each described heat-transfer pipe in the claim 1 to 4, it is characterized in that the said distortion body (12) of said heat-transfer pipe has the surface pipe body structure of following said distortion body (12) to be changed and the inner-walls of duct of variation.
6. according to each described heat-transfer pipe in the claim 1 to 4, it is characterized in that the outer wall of said heat-transfer pipe (20) has loose structure.
7. heat-transfer pipe according to claim 6; It is characterized in that; Loose structure on the said outer wall (20) of said heat-transfer pipe comprises the aperture (21) that the said heat-transfer pipe radial direction in a plurality of edges is provided with; And in axial direction follow the structural change of said outer wall (20) and the tunnel (22) that changes, said aperture (21) is connected with said tunnel (22).
8. heat-transfer pipe according to claim 7 is characterized in that, said aperture (21) arranging on axial direction follow said heat-transfer pipe said outer wall (20) structural change and change.
9. heat-transfer pipe according to claim 8 is characterized in that, said tunnel (22) have the radial section that in axial direction constantly changes.
10. a heat and mass equipment is characterized in that, comprises each described heat-transfer pipe in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084362XA CN102735089A (en) | 2011-04-02 | 2011-04-02 | Heat transfer pipe, and heat and mass transfer equipment having heat transfer pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084362XA CN102735089A (en) | 2011-04-02 | 2011-04-02 | Heat transfer pipe, and heat and mass transfer equipment having heat transfer pipe |
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| Publication Number | Publication Date |
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| CN102735089A true CN102735089A (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110084362XA Pending CN102735089A (en) | 2011-04-02 | 2011-04-02 | Heat transfer pipe, and heat and mass transfer equipment having heat transfer pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154790A (en) * | 2014-08-15 | 2014-11-19 | 同度能源科技（江苏）股份有限公司 | Spiral flat pipe type buried pipe |
| CN107860257A (en) * | 2017-10-11 | 2018-03-30 | 浙江环宸超通量管科技有限公司 | A kind of spiral porous surface tube |
| EP3745071A1 (en) * | 2019-05-31 | 2020-12-02 | Manoir Pitres | Tube comprising at least one twisted segment with elliptic or lobed section for a steam cracking furnace |
| CN113237097A (en) * | 2021-04-28 | 2021-08-10 | 浙江意动科技股份有限公司 | Heat exchanger for gas turbine |
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| US3456319A (en) * | 1967-01-23 | 1969-07-22 | John R Gier Jr | Method of making multifin helical fin tubes |
| CN1061088A (en) * | 1990-10-24 | 1992-05-13 | 运载器有限公司 | The high duty heat transfer surface of high-pressure refrigerant |
| CN2292268Y (en) * | 1996-11-04 | 1998-09-23 | 毛学起 | Spiral heat-exchanging tube |
| CN1624412A (en) * | 2003-12-02 | 2005-06-08 | 日立电线株式会社 | Boiling heat-transfer tube and making method thereof |
| CN201964818U (en) * | 2011-04-02 | 2011-09-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Heat transfer pipe and heat-transfer mass-transfer equipment comprising same |
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2011
- 2011-04-02 CN CN201110084362XA patent/CN102735089A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3456319A (en) * | 1967-01-23 | 1969-07-22 | John R Gier Jr | Method of making multifin helical fin tubes |
| CN1061088A (en) * | 1990-10-24 | 1992-05-13 | 运载器有限公司 | The high duty heat transfer surface of high-pressure refrigerant |
| CN2292268Y (en) * | 1996-11-04 | 1998-09-23 | 毛学起 | Spiral heat-exchanging tube |
| CN1624412A (en) * | 2003-12-02 | 2005-06-08 | 日立电线株式会社 | Boiling heat-transfer tube and making method thereof |
| CN201964818U (en) * | 2011-04-02 | 2011-09-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Heat transfer pipe and heat-transfer mass-transfer equipment comprising same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154790A (en) * | 2014-08-15 | 2014-11-19 | 同度能源科技（江苏）股份有限公司 | Spiral flat pipe type buried pipe |
| CN107860257A (en) * | 2017-10-11 | 2018-03-30 | 浙江环宸超通量管科技有限公司 | A kind of spiral porous surface tube |
| EP3745071A1 (en) * | 2019-05-31 | 2020-12-02 | Manoir Pitres | Tube comprising at least one twisted segment with elliptic or lobed section for a steam cracking furnace |
| FR3096766A1 (en) * | 2019-05-31 | 2020-12-04 | Manoir Pitres | tube comprising at least one twisted segment with elliptical or lobed section for a steam cracking furnace |
| US11542440B2 (en) | 2019-05-31 | 2023-01-03 | Centre National De La Recherche Scientifique | Tube for a steam cracking furnace having a segment with an elliptical or lobed cross section |
| CN113237097A (en) * | 2021-04-28 | 2021-08-10 | 浙江意动科技股份有限公司 | Heat exchanger for gas turbine |
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Application publication date: 20121017 |