CN205843459U - A kind of heat exchange tube structure - Google Patents
A kind of heat exchange tube structure Download PDFInfo
- Publication number
- CN205843459U CN205843459U CN201620721483.9U CN201620721483U CN205843459U CN 205843459 U CN205843459 U CN 205843459U CN 201620721483 U CN201620721483 U CN 201620721483U CN 205843459 U CN205843459 U CN 205843459U
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- China
- Prior art keywords
- heat exchange
- oval
- tube structure
- exchange tube
- heat
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Abstract
The utility model discloses a kind of heat exchange tube structure, including body, it is characterized in that, described body wall extends along body axial screw, in trilobal shape inside the cross section of body, described trilobal shape is made up of three identical oval blades, and one end of three oval blades is intersected, the other end flexes outward, rotationally symmetrical relative to body axle center, by rounding smooth connection between adjacent two oval blades；The long axis of each oval blade all deviates with body axle center.The fluid needing heat exchange flows along body inside SANYE diversion cavity, and SANYE diversion cavity increases the contact surface of fluid and heat exchanger tube.The cross section of SANYE diversion cavity is non-symmetric simultaneously so that the fluid flowing in heat exchange area occurs serious deflection, Secondary Flow more intensive in forming pipe so that heat transfer property gets a promotion.
Description
Technical field
This utility model relates to a kind of heat exchange tube structure, particularly relates to a kind of asymmetrical SANYE heat exchange tube structure.
Background technology
Along with the scarcity day by day of the energy, efficiently utilizing of the energy has had become as inexorable trend, and heat energy is daily as people
Utilizing the kind of most energy in production, it efficiently utilizes and is particularly important.At present, in the utilization of heat energy, the overwhelming majority is all
It is to be transmitted with heat by heat transmission equipment to be used by the way of exchanging between different medium, thus the structure of heat transmission equipment is straight
Connect the utilization rate determining its heat energy.Heat exchanger tube, is one of the core component of heat transmission equipment, and its heat exchange efficiency directly determines and changes
The heat exchange efficiency of hot equipment.In order to improve the heat exchange efficiency of heat transmission equipment, people exchange the structure of heat pipe and have carried out multiple design,
By initial smooth pipe, to finned tube, then to corrugated tubing and spiral grooved tube, the coefficient of heat transfer of heat exchanger tube has obtained constantly carrying
Rise, but, the rough structure of above-mentioned corrugated tubing or spiral grooved tube inner structural wall face easily produces backflow or fluid retention district,
Cause this region heat transfer effect poor, the problems such as flow resistance is bigger.On the other hand, in pipe, stagnant area easily produces dirt, makes
Obtain heat exchanger tube heat transfer effect in use for some time to be remarkably decreased, limit the use of other working medium (such as sewage).
Utility model content
This utility model is directed to a kind of more preferable heat exchange tube structure of heat exchange property.
Heat exchange tube structure described in the utility model, including body, it is characterised in that described body wall is axial along body
Spiral extension, in trilobal shape inside the cross section of body, described trilobal shape is made up of three identical oval blades, three
One end of oval blade is intersected, the other end flexes outward, rotationally symmetrical relative to body axle center, adjacent two oval blades
Between by rounding smooth connection；The long axis of each oval blade all deviates with body axle center.
A kind of heat exchange tube structure described in the utility model, the body wall of its heat exchanger tube has been internally formed asymmetrical spiral shell
The trilobal inner chamber of rotation shape.When fluid flows through tube chamber heat exchange, trilobal inner chamber not only increases the contact surface of fluid and heat exchanger tube,
The helical form trilobal inner chamber of asymmetry can also make tube fluid be formed outside eddy flow simultaneously, defines little whirlpool at near-wall
Whirlpool, thus increase cross-section radial and tangential speed, and in the trilobal inner chamber of asymmetry can also make heat exchange area
There is certain deflection in fluid flowing, forms stronger Secondary Flow, so that the heat transfer property of heat exchanger tube is further
Get a promotion.
Described body wall can be along body spiral extension the most clockwise；Can also be along the axial counter clockwise direction of body
Spiral extension.In different hand of spiral heat exchanger tubes, spiral is than the heat transfer property difference of counterclockwise spiral clockwise
Not quite.
Accompanying drawing explanation
Fig. 1 is the perspective view of this utility model heat exchanger tube.
Fig. 2 is the cross sectional representation of this utility model heat exchanger tube.
Detailed description of the invention
A kind of heat exchange tube structure, as shown in Figure 1 and Figure 2, the wall of heat exchanger tube body 5 extends along body axial screw, body
Cross section in trilobal shape 1, described trilobal shape is made up of three identical oval blades 11,12,13, three ellipses
One end of blade is intersected, the other end flexes outward, rotationally symmetrical relative to body axle center, logical between adjacent two oval blades
Cross rounding 2 smooth connection；The long axis 3 of each oval blade all deviates with body axle center 4 and apart from equal.
Trilobal shape 1 body cross section, all tangent with same circumscribed circle 42 at the oval blade in three, outside, connect in inner side
The circular arc connecing rounding 2 between each oval blade is the most tangent with same inscribed circle 41.
Described body wall can be along body spiral extension the most clockwise；Can also be along the axial counter clockwise direction of body
Spiral extension.Its pitch is preferred with 50-250mm.
The oval major and minor axis ratio of each blade is limited between 1:1.5 to 1:1.8, the trilobal shape of body cross section
The circumscribed circle 42 of 1 and the diameter proportion of inscribed circle 41 are limited between 1:1.8 to 1:2.3.
Described heat exchange tube structure, can use clock wise spirals or counter-clockwise helical, the Angle ambiguity of rotation twist
It is advisable at 5 °～30 °.
Embodiment 1
A kind of heat exchange tube structure described in the utility model, body clockwise direction spiral extension vertically, tube section is
Above-mentioned trilobal shape, torque S is 200mm, and rounding radii is 2.5mm, distorts 10 ° of inclination angle, inscribed circle diameter 10mm, circumscribed circle
Diameter 22.2mm, SANYE transverse length 14.7mm, SANYE ellipse short shaft length 8mm, the long axis of oval blade all with
Body axle center 4 deviates distance 6.16 mm.
Above-mentioned heat exchanger tube, exchange heat pipe intraductal heat transfer performance is used to be simulated calculating.Model is set up and stress and strain model exists
Gambit 2.3 completes, and solving of governing equation uses Fluent 6.3.Consider calculating time and computational accuracy, number
Value simulation uses periodic boundary condition.Use SST k-ω turbulence model.In order to improve computational efficiency, done during simulation as
Under simplification assume: the hot physical property of (1) fluid is assumed to be constant；(2) zoning is incompressible steady-flow；(3) ignore
Free convection and thermal-radiating impact.The grid of near wall region needs encryption and makes y+ be less than 1 to improve the precision calculated.Speed and
The coupling of pressure uses SIMPLE algorithm, convective term and the discrete employing Second-order Up-wind form of diffusion term.Wall is set as permanent heat
Stream.Calculate convergence is set as that flow equation residual error is less than 10-5, energy equation residual error is less than 10-8.It is computed, obtains institute
The heat transfer coefficient stating heat exchanger tube is 2330～7070W/ (m2K)。
Embodiment 2
Except body counter clockwise direction spiral extension vertically, remaining is same with embodiment 1.Enter by the analogy method of embodiment 1
Row calculates, and the convective heat-transfer coefficient obtaining described heat exchanger tube is 2280～7021 W/ (m2K)。
Comparative example 1
Use common oval torsion heat exchange pipe, parameter be long axis length be 22.2mm, minor axis length is 17.5mm, by upper
Stating identical analogy method to calculate, the convection transfer rate obtaining heat exchanger tube is 1050～3567W/m2K。
Comparative example 2
Using common pipe, caliber is 20mm, is calculated the convective heat-transfer coefficient of common pipe by Empirical Equation
It is 750～3330W/ (m2K)。
Comparative example 1,2, comparative example 1,2, embodiment 1 and embodiment 2,
Embodiment 1 and embodiment 2, the asymmetric SANYE heat exchanger tube of two kinds of different rotation directions, its convection transfer rate comparison ratio
The common oval torsion heat exchange pipe of example 1 improves 96.8%～122.4%.
Embodiment 1 and embodiment 2, the asymmetric SANYE heat exchanger tube of two kinds of different rotation directions, its convection transfer rate is contrast
2.1～3.0 times of the common pipe of example 2.
Spiral is more or less the same with the heat exchange property of counterclockwise spiral clockwise.This cast heat exchange efficiency obtains
Certain lifting, and pressure drop promotes little.
Claims (5)
1. a heat exchange tube structure, including body, it is characterised in that described body wall extends along body axial screw, body
Cross section inside in trilobal shape, described trilobal shape is made up of three identical oval blades, three oval blades
One end is intersected, the other end flexes outward, rotationally symmetrical relative to body axle center, passes through rounding between adjacent two oval blades
Angle smooth connection；The long axis of each oval blade all deviates with body axle center.
Heat exchange tube structure the most according to claim 1, it is characterised in that the diameter ratio of the circumscribed circle of diversion cavity and inscribed circle
For 1:1.8 to 1:2.3.
Heat exchange tube structure the most according to claim 1, it is characterised in that described oval axial ratio be 1:1.5 extremely
1:1.8。
4. according to the heat exchange tube structure in any of the one of claims 1 to 3, it is characterised in that described body wall is along pipe
The pitch that body axial screw extends is 50～250mm.
5. according to the heat exchange tube structure in any of the one of claims 1 to 3, it is characterised in that described body wall is along pipe
Body spiral extension the most clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620721483.9U CN205843459U (en) | 2016-07-11 | 2016-07-11 | A kind of heat exchange tube structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620721483.9U CN205843459U (en) | 2016-07-11 | 2016-07-11 | A kind of heat exchange tube structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205843459U true CN205843459U (en) | 2016-12-28 |
Family
ID=57618424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620721483.9U Expired - Fee Related CN205843459U (en) | 2016-07-11 | 2016-07-11 | A kind of heat exchange tube structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205843459U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017186A (en) * | 2016-07-11 | 2016-10-12 | 广东环境保护工程职业学院 | Heat exchange tube structure |
| CN106931820A (en) * | 2017-05-03 | 2017-07-07 | 广州市壹套节能设备有限责任公司 | Fin spiral heat exchange tube and heat exchanger |
| TWI614477B (en) * | 2017-06-16 | 2018-02-11 | Wu Sen Chan | Star heat pipe structure |
-
2016
- 2016-07-11 CN CN201620721483.9U patent/CN205843459U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017186A (en) * | 2016-07-11 | 2016-10-12 | 广东环境保护工程职业学院 | Heat exchange tube structure |
| CN106931820A (en) * | 2017-05-03 | 2017-07-07 | 广州市壹套节能设备有限责任公司 | Fin spiral heat exchange tube and heat exchanger |
| TWI614477B (en) * | 2017-06-16 | 2018-02-11 | Wu Sen Chan | Star heat pipe structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20190711 |