CN104296584A - Spiral band passive enhancement heat exchanging pipe - Google Patents
Spiral band passive enhancement heat exchanging pipe Download PDFInfo
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- CN104296584A CN104296584A CN201410552661.5A CN201410552661A CN104296584A CN 104296584 A CN104296584 A CN 104296584A CN 201410552661 A CN201410552661 A CN 201410552661A CN 104296584 A CN104296584 A CN 104296584A
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- spiral band
- pipe
- fluid
- thermoexcell
- base tube
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Abstract
A spiral band passive enhancement heat exchanging pipe comprises a base pipe and a spiral band spirally disposed in the base pipe. The spiral band passive enhancement heat exchanging pipe is characterized in that the spiral band is made of metal foam materials and sintered on the inner wall of the base pipe. The spiral band passive enhancement heat exchanging pipe has the advantages that the features of the metal foam materials are combined with the turbulence theory according to the basic principles of heat transfer enhancement; when fluid flows in the pipe, spiral vortexes are generated under the guidance of the spiral band, the boundary layers of the fluid is destroyed, disturbance is enhanced, heat exchanging coefficient is increased greatly, some fluid can pass the holes of the spiral band due to the fact that metal foam is porous, and flowing resistance is reduced; the metal foam spiral band high in porosity is sintered inside the pipe, so that a heat exchanging surface extends into the fluid, and the heat exchanging area of the fluid and the wall surface is greatly expanded.
Description
Technical field
The present invention relates to a kind of thermoexcell, particularly relate to the metal foam spiral band passive facilitation heat exchanger tube in a kind of fluid heat exchanger or radiator.
Background technology
The efficient enhanced heat exchange form of the disturbance of spiral band thermoexcell one class enhance fluid, mixing and scale removal is installed in pipe.Existing more scholar is studied installing spiral vinculum appts in pipe additional, and the spiral band installing metal foaming material in pipe additional is the more effective enhanced heat exchange mode of one.Patent CN2568324 proposes a kind of device installing spiral band in base tube additional; Document: application (hair a kind of jade, the Li Lianjie of spiral band enhanced heat exchange and scale removal in condenser; Energy-conservation, 2007) have studied the application of spiral band enhanced heat exchange and scale removal in condenser; Document: horizontal pipe inner fluid power cleans structural relation research (Liu Jizhao, Liu Zhiru, the Yu Xiumin of spiral band automatically; Lathe and hydraulic pressure, 2003) have studied spiral band structural parameters to tie cleansing power, fluid resistance and heat conduction reinforced relation.These researchs respectively have feature to spiral band mounting means in pipe, but this kind of thermoexcell generally adopts the way be separated with tube wall by spiral band, the non-spiral band fixedly secured adds the vulnerability of heat exchanger tube, and is greatly limited because spiral band does not contact its capacity of heat transmission with tube wall.In addition, the material that manufacture spiral band adopts is substantially all sheet metal, and therefore the fluid chemical field of this kind of thermoexcell receives certain restriction.
Metal foam be development in recent years get up a class set high-termal conductivity, high-permeability, high surface density, lightweight, excellent mechanical properties and better fluid chemical field ability etc. in the desirable heat exchange material of one.Because metal foam has very strong flow disturbance ability and flow conductivity, can very big enhance fluid turbulence degree.The heat exchange property of the enhanced heat exchange passage that metal foam is filled completely is extremely strong, but pressure drop is also very large, this greatly restricted this kind of application of filling metal foam enhanced heat exchange form completely.And be partially filled metal foam thermoexcell using metal foam as swirl element, can not only make to produce in process fluid flow a large amount of Secondary Flow, and there is less flow pressure drop.Compared with the enhanced tube adopting sheet metal spiral band with tradition, metal foam spiral band enhanced tube can not only promote the mixed effect of tie two side liquid, and tube wall heat effectively can be delivered to internal fluid in the passive facilitation heat exchange form of tube wall by metal foam sintering, thus reach rib-type enhanced heat exchange effect.
Summary of the invention
For solving traditional thermoexcell Problems existing, the object of this invention is to provide a kind of firm and durable, good heat conductivity, spiral band passive facilitation heat exchanger tube that fluid chemical field ability is strong.
The technical solution used in the present invention is: a kind of spiral band passive facilitation heat exchanger tube, and comprise base tube and the spiral band in base tube that spirals, it is characterized in that, this spiral band is made up of metal foaming material, and is fixed on the inwall of base tube.
Preferably, this spiral band is fixed on described base tube inwall by material sintering technology.
Spiral band through the pipeline section of whole thermoexcell, also preferably can be arranged at the distance being not more than 50 times of calibers apart from the mouth of pipe, be particularly preferably the caliber distance of 25 ~ 50 times, to ensure that the fluid section of disturbance is for fully developed section.
Preferably, the porosity ranges of metal foaming material is 0.8-0.99, and hole density range is 5PPI-300PPI.
Preferably, metal foaming material is the high conductivity material such as copper, Aluminum-aluminum alloy.
Preferably, the thickness δ of spiral band is not more than the base tube internal diameter d of 0.3 times
t, i.e. δ≤0.3d
t.
Preferably, the pitch of spiral band is less than pipe range, and for the long tube (pipe range L > 30cm) of stock size, the scope of the pitch (B) of spiral band is 20mm≤B≤200mm.
Preferably, the diameter d of spiral band equals base tube internal diameter d
t.
Preferably, the kind of this enhanced heat exchange tube fluid is noncorrosive fluid.
The feature of metal foaming material, according to augmentation of heat transfer general principle, combines with turbulence theory by the present invention, and the enhanced tube provided is a kind of passive facilitation heat exchanger tube with metal foam spiral band.When fluid is at Bottomhole pressure, under the guide functions of spiral band, spiral helicine whirlpool can be produced, destroy the boundary layer of fluid, enhance disturbance, substantially increase the coefficient of heat transfer, simultaneously, because the porous of metal foam, a part of fluid can also pass tie hole, reduces flow resistance.In addition, in pipe, the metal foam spiral band of this kind of high porosity of sintering, can extend to internal fluid by heat-transfer surface, greatly extend the heat exchange area of fluid and wall.If be applied in pipe heat exchanger and radiator by this kind of passive facilitation heat exchanger tube, the heat exchange property of pipe type heat transfer equipment can not only be improved, and lower pressure drop can be ensured.And this structure does not need additionally to increase other equipment, stable and reliable operation, need not make larger change in the structure of original equipment, is also suitable for changing as the enhanced heat exchange pipe fitting of heat transmission equipment.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section vertically of heat exchanger tube of the present invention
Fig. 2 is the vertical axial schematic cross-section of heat exchanger tube of the present invention
Detailed description of the invention
Below in conjunction with accompanying drawing, know-why of the present invention is described further.
Embodiment 1
See Fig. 1 and Fig. 2, a kind of spiral band passive facilitation heat exchanger tube that the present invention relates to comprises: base tube 1, spiral band 2, fluid intake end 3 and fluid outlet 4.Wherein, spiral band 2 is made up of the metal foaming material of porous, be sintered on the base tube inwall of heat exchanger tube by foam sintering technology, the diameter of spiral band 2 is identical with the internal diameter of base tube 1, and the two ends of this spiral band 2 are all arranged at the distance apart from the mouth of pipe 30 times of calibers.Tube wall is when being subject to fluid cooling or heating, heat exchanging fluid enters heat exchanger tube from fluid intake end 3, swirling two-phase flows under the guide functions of spiral band, fluid passes from the hole of metal foam simultaneously, significantly enhance the disturbance of fluid, improve heat exchange property, flow out from fluid outlet 4 after having exchanged heat.
Embodiment 2
In the present embodiment, the diameter of spiral band 2 is slightly less than the internal diameter of base tube 1, and the two ends of this spiral band are all arranged at the distance apart from the mouth of pipe 50 times of calibers.In addition, the metal foaming material of employing is albronze, and the porosity of metal foaming material is 0.85, and hole density is 200PPI.The thickness of spiral band 2 is 0.2 times of base tube 1 internal diameter, and the fluid be suitable for is the gas that the thermal conductivity factors such as air are less.
Embodiment 3
In the present embodiment, the diameter of spiral band 2 equals the internal diameter of base tube 1, and the two ends of this spiral band are all arranged at the distance apart from the mouth of pipe 40 times of calibers.In addition, the metal foaming material of employing is copper or aluminium, and the porosity ranges of metal foaming material is 0.9, and hole density range is 20PPI.The thickness of spiral band 2 is 0.1 times of base tube 1 internal diameter, and the fluid be suitable for is that viscosity is comparatively large, the good liquid of the capacity of heat transmission.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a spiral band passive facilitation heat exchanger tube, comprises base tube and spiral band, and described spiral band spirals in base tube, it is characterized in that, described spiral band is made up of metal foaming material, and is fixed on the inwall of base tube.
2. thermoexcell according to claim 1, is characterized in that: described spiral band is fixed on described base tube inwall by material sintering technology.
3. thermoexcell according to claim 1, is characterized in that: described spiral band is arranged at the distance being not more than 50 times of calibers apart from the described base tube mouth of pipe.
4. thermoexcell according to claim 1, is characterized in that: described spiral band is arranged at the distance apart from the described base tube mouth of pipe 25 ~ 50 times of calibers.
5. thermoexcell according to claim 1, is characterized in that: the porosity ranges of described metal foaming material is 0.8-0.99, and hole density range is 5PPI-300PPI.
6. thermoexcell according to claim 1, is characterized in that: described metal foaming material is copper, aluminium or its alloy.
7. thermoexcell according to claim 1, is characterized in that: the thickness δ of described spiral band and described base tube internal diameter d
tbetween pass be δ≤0.3d
t.
8. thermoexcell according to claim 1, is characterized in that: as the pipe range L > 30cm of described base tube, and the scope of the pitch B of described spiral band is 20mm≤B≤200mm.
9. thermoexcell according to claim 1, is characterized in that: the external profile diameter of described spiral band equals base tube internal diameter.
10. the application of the thermoexcell according to any one of claim 1-9 on heat exchanger or radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552661.5A CN104296584A (en) | 2014-10-17 | 2014-10-17 | Spiral band passive enhancement heat exchanging pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552661.5A CN104296584A (en) | 2014-10-17 | 2014-10-17 | Spiral band passive enhancement heat exchanging pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104296584A true CN104296584A (en) | 2015-01-21 |
Family
ID=52316420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410552661.5A Pending CN104296584A (en) | 2014-10-17 | 2014-10-17 | Spiral band passive enhancement heat exchanging pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104296584A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016150303A1 (en) * | 2015-03-23 | 2016-09-29 | 邱于正 | Porous heat exchanger |
| CN107062297A (en) * | 2017-05-09 | 2017-08-18 | 国网山东省电力公司电力科学研究院 | A kind of horizontal enamel tubular air preheater |
| CN107314682A (en) * | 2017-08-29 | 2017-11-03 | 广西容县顺垚仿古建陶有限公司 | A kind of ancient architecture blue bricks fires the water circle device of kiln |
| CN109341379A (en) * | 2018-11-26 | 2019-02-15 | 天津大学 | A kind of baffle plate and shell-and-tube heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1376303A (en) * | 1972-05-03 | 1974-12-04 | Atomic Energy Authority Uk | Tubular heat exchangers |
| CN202420268U (en) * | 2011-12-26 | 2012-09-05 | 中国核电工程有限公司 | Heat exchange tube of containment-based passive heat export system heat exchanger |
| CN102878851A (en) * | 2012-09-11 | 2013-01-16 | 天津大学 | Micro-channel heat exchanger and foam metal fins thereof |
| CN203518736U (en) * | 2013-07-22 | 2014-04-02 | 遂宁华能机械有限公司 | Drum type multi-tube slag cooler |
-
2014
- 2014-10-17 CN CN201410552661.5A patent/CN104296584A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1376303A (en) * | 1972-05-03 | 1974-12-04 | Atomic Energy Authority Uk | Tubular heat exchangers |
| CN202420268U (en) * | 2011-12-26 | 2012-09-05 | 中国核电工程有限公司 | Heat exchange tube of containment-based passive heat export system heat exchanger |
| CN102878851A (en) * | 2012-09-11 | 2013-01-16 | 天津大学 | Micro-channel heat exchanger and foam metal fins thereof |
| CN203518736U (en) * | 2013-07-22 | 2014-04-02 | 遂宁华能机械有限公司 | Drum type multi-tube slag cooler |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016150303A1 (en) * | 2015-03-23 | 2016-09-29 | 邱于正 | Porous heat exchanger |
| CN107062297A (en) * | 2017-05-09 | 2017-08-18 | 国网山东省电力公司电力科学研究院 | A kind of horizontal enamel tubular air preheater |
| CN107062297B (en) * | 2017-05-09 | 2019-05-21 | 国网山东省电力公司电力科学研究院 | A kind of horizontal enamel tubular air preheater |
| CN107314682A (en) * | 2017-08-29 | 2017-11-03 | 广西容县顺垚仿古建陶有限公司 | A kind of ancient architecture blue bricks fires the water circle device of kiln |
| CN109341379A (en) * | 2018-11-26 | 2019-02-15 | 天津大学 | A kind of baffle plate and shell-and-tube heat exchanger |
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Application publication date: 20150121 |
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| RJ01 | Rejection of invention patent application after publication |