CN106017186A - Heat exchange tube structure - Google Patents
Heat exchange tube structure Download PDFInfo
- Publication number
- CN106017186A CN106017186A CN201610538702.4A CN201610538702A CN106017186A CN 106017186 A CN106017186 A CN 106017186A CN 201610538702 A CN201610538702 A CN 201610538702A CN 106017186 A CN106017186 A CN 106017186A
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- CN
- China
- Prior art keywords
- leaf
- heat exchange
- diversion cavity
- tube structure
- exchange tube
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- 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.)
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Classifications
-
- 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
-
- 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
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a heat exchange tube structure which comprises a hollow tube body, and is characterized in that a three-leaf diversion cavity is formed in the tube body; the three leaves of the three-leaf diversion cavity are distributed in an equal-radian manner; and the gap between every two adjacent leaves of the three-leaf diversion cavity is (two thirds)*Pi. The three-leaf diversion cavity spirally extends in the axial direction of the tube body; and the central axis of the cross section of each leaf of the three-leaf diversion cavity deviates from the axis of the tube body. The central axis of each leaf of the three-leaf diversion cavity deviates from the axis of the tube body, and the three-leaf diversion cavity rotationally extends to form a shape of a long tube. A fluid needing heat exchange flows in the three-leaf diversion cavity along the tube body, and the three-leaf diversion cavity increases the contact surface between the fluid and a heat exchange tube. Besides, the cross section of the three-leaf diversion cavity is asymmetric, so that the fluid deviates to flow in a heat exchange area to form a strong secondary flow in the tube, and the heat transfer performance is improved.
Description
Technical field
The present invention relates to a kind of heat exchange tube structure, particularly relate to a kind of asymmetrical SANYE heat exchange tube structure.
Background technology
Day by day deficient along with the energy, efficiently utilizing of the energy has had become as inexorable trend, heat energy, and as utilizing the kind of most energy in the daily production of people, it efficiently utilizes and is particularly important.At present, in the utilization of heat energy, the overwhelming majority is all 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 directly determines the utilization rate of its heat energy.Heat exchanger tube, is one of the core component of heat transmission equipment, and its heat exchange efficiency directly determines the heat exchange efficiency of heat transmission 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 continuous lifting, but, the rough structure of above-mentioned corrugated tubing or spiral grooved tube inner structural wall face easily produces backflow or fluid retention district, causes 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 so that heat exchanger tube heat transfer effect in use for some time is remarkably decreased, and limits the use of other working medium (such as sewage).
Summary of the invention
It is contemplated that provide oneHeat exchange property is more preferableHeat exchange tube structure.
Heat exchange tube structure of the present invention, 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.
A kind of heat exchange tube structure of the present invention, the body wall of its heat exchanger tube has been internally formed asymmetrical spiral helicine trilobal inner chamber.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, little whirlpool is defined at near-wall, thus increase cross-section radial and tangential speed, and the trilobal inner chamber of asymmetry can also make the fluid flowing in heat exchange area that certain deflection occurs, and forms stronger Secondary Flow, so that the heat transfer property of heat exchanger tube further gets a promotion.
Described body wall can be along body spiral extension the most clockwise；Can also be along body the most counterclockwise spiral extension.In different hand of spiral heat exchanger tubes, spiral is more or less the same than the heat transfer property of counterclockwise spiral clockwise.
Accompanying drawing explanation
Fig. 1 is the perspective view of heat exchanger tube of the present invention.
Fig. 2 is the cross sectional representation of heat exchanger tube of the present invention.
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, in trilobal shape 1 in the cross section of body, described trilobal shape is made up of three identical oval blades 11,12,13, one end of three oval blades is intersected, the other end flexes outward, rotationally symmetrical relative to body axle center, by rounding 2 smooth connection between adjacent two oval blades；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, the circular arc of the rounding 2 between each oval blade of inner side connection 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 body the most counterclockwise spiral extension.Its moment of torsion 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, and the circumscribed circle 42 of the trilobal shape 1 of body cross section 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, and the Angle ambiguity of rotation twist is advisable at 5 °～30 °.
Embodiment 1
A kind of heat exchange tube structure of the present invention, body clockwise direction spiral extension vertically, tube section is above-mentioned trilobal shape, and torque S is 200mm, and rounding radii is 2.5mm, 10 ° of inclination angle of distortion, 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 deviates distance 6.16 mm with body axle center 4.
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 completes in Gambit 2.3, and solving of governing equation uses Fluent 6.3.Considering calculating time and computational accuracy, numerical simulation uses periodic boundary condition.Use SST
K-ω turbulence model.In order to improve computational efficiency, do following simplification during simulation and assumed: the hot physical property of (1) fluid has been assumed to be constant；(2) zoning is incompressible steady-flow；(3) free convection and thermal-radiating impact are ignored.The grid of near wall region needs encryption and makes y+ be less than 1 to improve the precision calculated.The coupling of speed and pressure uses SIMPLE algorithm, convective term and the discrete employing Second-order Up-wind form of diffusion term.Wall is set as constant heat flow.Calculate convergence is set as that flow equation residual error is less than 10-5, energy equation residual error is less than 10-8.Being computed, the heat transfer coefficient obtaining described heat exchanger tube is 2330～7070W/ (m2K)。
Embodiment 2
Except body counter clockwise direction spiral extension vertically, remaining is same with embodiment 1.Calculating by the analogy method of embodiment 1, 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, calculates by above-mentioned identical analogy method, and the convection transfer rate obtaining heat exchanger tube is 1050～3567W/m2K。
Comparative example 2
Using common pipe, caliber is 20mm, and the convective heat-transfer coefficient being calculated common pipe by Empirical Equation 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 oval torsion heat exchange pipe more common than comparative 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 2.1～3.0 times of the common pipe of comparative example 2.
Spiral is more or less the same with the heat exchange property of counterclockwise spiral clockwise.This cast heat exchange efficiency has obtained certain lifting, and pressure drop promotes little.
Claims (5)
1. a 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.
Heat exchange tube structure the most according to claim 1, it is characterised in that the circumscribed circle of diversion cavity is 1 with the diameter ratio of inscribed circle: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 is 1:1.5 to 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 50～250mm along the pitch that body axial screw extends.
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 body spiral extension the most clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610538702.4A CN106017186A (en) | 2016-07-11 | 2016-07-11 | Heat exchange tube structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610538702.4A CN106017186A (en) | 2016-07-11 | 2016-07-11 | Heat exchange tube structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106017186A true CN106017186A (en) | 2016-10-12 |
Family
ID=57109908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610538702.4A Pending CN106017186A (en) | 2016-07-11 | 2016-07-11 | Heat exchange tube structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106017186A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014014A (en) * | 2022-07-01 | 2022-09-06 | 浙江壳邦力特油脂有限公司 | Cooling water circulation device for lubricating grease production |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2292268Y (en) * | 1996-11-04 | 1998-09-23 | 毛学起 | Spiral heat-exchanging tube |
| CN2851778Y (en) * | 2005-10-18 | 2006-12-27 | 熊英凯 | Radial corrugated pipe |
| JP2008121908A (en) * | 2006-11-08 | 2008-05-29 | Sumitomo Light Metal Ind Ltd | Heat exchanger |
| CN201359461Y (en) * | 2009-01-13 | 2009-12-09 | 杭州沈氏换热器有限公司 | Corrugated tube externally wound with metal tubelet |
| CN102116585A (en) * | 2009-12-31 | 2011-07-06 | 英特换热设备(浙江)有限公司 | Coaxial heat exchanger |
| CN104848726A (en) * | 2015-06-05 | 2015-08-19 | 杭州沈氏节能科技股份有限公司 | Multi-head spiral section tube and multi-head spirally-fluted heat exchange tube |
| CN205843459U (en) * | 2016-07-11 | 2016-12-28 | 广东环境保护工程职业学院 | A kind of heat exchange tube structure |
-
2016
- 2016-07-11 CN CN201610538702.4A patent/CN106017186A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2292268Y (en) * | 1996-11-04 | 1998-09-23 | 毛学起 | Spiral heat-exchanging tube |
| CN2851778Y (en) * | 2005-10-18 | 2006-12-27 | 熊英凯 | Radial corrugated pipe |
| JP2008121908A (en) * | 2006-11-08 | 2008-05-29 | Sumitomo Light Metal Ind Ltd | Heat exchanger |
| CN201359461Y (en) * | 2009-01-13 | 2009-12-09 | 杭州沈氏换热器有限公司 | Corrugated tube externally wound with metal tubelet |
| CN102116585A (en) * | 2009-12-31 | 2011-07-06 | 英特换热设备(浙江)有限公司 | Coaxial heat exchanger |
| CN104848726A (en) * | 2015-06-05 | 2015-08-19 | 杭州沈氏节能科技股份有限公司 | Multi-head spiral section tube and multi-head spirally-fluted heat exchange tube |
| CN205843459U (en) * | 2016-07-11 | 2016-12-28 | 广东环境保护工程职业学院 | A kind of heat exchange tube structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014014A (en) * | 2022-07-01 | 2022-09-06 | 浙江壳邦力特油脂有限公司 | Cooling water circulation device for lubricating grease production |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161012 |
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| RJ01 | Rejection of invention patent application after publication |