CN2798021Y - Two surface stengthened falling-film type heat transfer tube - Google Patents
Two surface stengthened falling-film type heat transfer tube Download PDFInfo
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- CN2798021Y CN2798021Y CN 200520042093 CN200520042093U CN2798021Y CN 2798021 Y CN2798021 Y CN 2798021Y CN 200520042093 CN200520042093 CN 200520042093 CN 200520042093 U CN200520042093 U CN 200520042093U CN 2798021 Y CN2798021 Y CN 2798021Y
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Abstract
The utility model belongs to the technical field of a heat transfer device, and particularly relates to a film falling type finned tube with double-surface enhancement. The utility model is composed of a tube body, fin tables, fin root slots, internal screw threads and grooves, wherein the outer surface of the pipe body is distributed with the convex fin tables along the circumferential direction, the fin root slots are arranged among the fin tables along the circumferential direction, the inner surface of the tube body is distributed with rifle type internal screw threads, the internal screw threads of the tube body are uniformly separated by the grooves along the circumferential direction. As the utility model is provided with the trapezoidal convex fin tables and the fin root slots, the axial hydrophilicity and circumferential hydrophilicity of the heat exchange tube are both improved, and the heat transfer performance of the refrigerant on falling films and transferring heat is improved. The interior of the tube body uses the three-dimensional crossed internal screw threads, the coefficient of convective heat transfer is further improved, and the utility model is especially suitable for convective heat transfer occasions when the interior of the tube has turbulent flow. The utility model can use the disposable shaping and manufacture technology, and the work efficiency is high.
Description
Technical field
The utility model belongs to the heat-transfer equipment technical field, is specifically related to a kind of two-sided strengthened falling film type finned tube.
Background technology
Circumferentially finned tube has various ways, and wherein screw finned pipe (low ribbed pipe) application in industry is comparatively general, can increase the outer tube surface heat exchange area, is used widely in refrigeration and other industrial circles.Because the problem of hydrostatic column height, in the evaporimeter of absorption refrigerating machine and absorber, extensively adopt the falling film type heat exchanger, its housing is operation under the vacuum condition, use cold-producing medium (for example water) spray (or dripping pouring) on horizontal many rows heat-transfer pipe, the interior refrigerating medium (for example water) of pipe cools off or heats, and utilizes between the interior refrigerating medium of outer cold-producing medium of pipe and pipe and carries out heat exchange.
As in the absorption refrigerating machine evaporimeter, with the heating of the water in pipe tube wall, make the cold-producing medium that is distributed in tube outer surface under vacuum condition, evaporate, the exchange capability of heat of heat-transfer pipe and cold-producing medium are closely related in the distribution and the diffusivity of outer surface, the hydrophily of heat-transfer pipe outer wall improves, can increase effective heat exchange area and attenuate liquid film, so just can reduce the liquid film thermal resistance to promote heat exchange.In practical application, be the phase-change heat-exchange process of fluid outside managing sometimes, actual thermal resistance is approaching in the pipe outer tube, and if design through enhanced heat exchange outside the pipe, the pipe internal thermal resistance may be outer bigger than pipe; At this moment, in pipe, process the enhanced heat exchange surface, further augmentation of heat transfer.Traditional inside intensify heat transfer pipe is the rifling of two dimension in the pipe, or is called internal thread, can further increase heat exchange area as the inner surface that adopts 3D shape, improves the heat transfer coefficient in the pipe.
Traditional intensify heat transfer pipe is provided with circumferential screw thread in that pipe is outer, has increased heat exchange area, but outside managing the easy circumferential flow of refrigerant fluid, axial flow seldom or does not almost have, thereby has limited to the expansion of the humidification zones of cold-producing medium.Tube bundle to many rows' arrangements, the position of refrigerant liquid drippage is approaching, is accumulated to following a few row like this, and the liquid film accumulation is thicker, the liquid film thermal resistance is bigger, influence is conducted heat, and is inhomogeneous in the heat exchanger tube surface distributed, even some zone is " drying ", evaporation and heat-exchange can not be effectively realized in these zones, also cause the tube-surface drop to splash in addition easily, increased circulating mass of refrigerant, also influenced actual effective heat exchange area.
Summary of the invention
The purpose of this utility model is to propose a kind of outer axially hydrophily of pipe that both can increase, and can increase the falling film type heat-transfer pipe of the long-pending further enhanced heat exchange of pipe internal surface again.
The falling film type heat-transfer pipe that the utility model proposes adopts the mode of two-sided strengthened heat transfer, and its structure as depicted in figs. 1 and 2.Wherein, the outer surface of tube body 1 is along the bossed wing platform 2 that circumferentially distributes, and the edge is circumferentially with wing root groove 3 between the wing platform 2; The inner surface of tube body 1 is distributed with the internal thread 4 of rifling formula, and along circumferentially fluted 5, circumferential recess 5 positions and pipe are outer, and wing platform 2 is corresponding accordingly, and the internal thread 4 of tube body 1 is evenly separated by circumferential recess 5.
In the utility model, the axial spacing that the wing platform of tube outer surface is 2 is 0.8～2.8mm, the axial length of wing platform 2 is 0.5～1.87mm, circumferential lengths gets final product less than axial length, the height of wing platform 2 is 0.35～0.8mm, the wing interstation forms long channel along axis, help water in axial diffusion with prolong the time of staying of water on the surface, be convenient to the liquid film evaporation heat exchange, but as the excessive height of wing platform, be unfavorable for the tube-surface hydrophily, and the consumption basepipe materials is many, spend lowly as the height of wing platform, its heat exchange area is less.
In the utility model, wing root groove 3 rectangular or round point shapes, the degree of depth of wing root groove 3 is 0.04～0.12mm, and the diameter of toroidal or rectangular-shaped long limit provide the gasification core of the circumferential current of wing root like this less than 0.5mm, and it steams method heat exchange and also is reinforced.
In the utility model, the height of the internal thread 4 of tube body 1 is 0.15～0.4mm, is 40～46 degree with the angle of axis, and number of starts is 8～30.
In the utility model, the shape of wing platform 2 is cubic taper type, and frustum forms domatic, is beneficial to the diffusion of cold-producing medium (as water).
In the utility model, the setting of heat-transfer pipe surfaces externally and internally had both increased heat exchange area, the tube body outer surface is cut apart axially grooved simultaneously, it is more smooth to make that the liquid film axial flow gets, thereby, improving axial moistening diffusivity greatly, the wing platform of projection and wing root and wing root groove have nothing in common with each other for the cold-producing medium surface tension, thereby formed the power that liquid film flows, promptly improved the hydrophily of heat-transfer pipe outer surface; Because gravity effect, fluid drips along circumferential easily at the liquid film that tube surface forms, and wing root groove can increase the local hydrophily of wing root, and has suitably increased the resistance of circumferential flow, improve the anelasticity of refrigerant, help the evaporation of liquid film on the circumferential tubes surface; Wettability improves like this, makes the coefficient of heat transfer of individual tubes to improve; In addition since fluid drips fall down the position of one deck heat exchanger tube can conversion, help the improvement of one deck heat exchanger tube wettability down equally, each wetted area (being effective heat exchange area) of arranging heat exchanger tube all can improve, so improved the heat exchange property of whole heat exchanger.
But the turbulence level of the interior heat convection of thermoexcell behind the increase internal thread in the tube body, thereby enhanced heat exchange; Particularly adopt outside pipe under the situation of strengthening surface, pipe thermal resistance interior and that pipe is outer is more approaching, to further reinforcement the in managing, can effectively improve whole heat transfer property.The setting of the utility model tube outer surface can periodically be cut apart the internal thread in managing simultaneously, thereby form three-dimensional internal thread, the common internal thread of comparing, both increased heat exchange area, the fluid heat transferring boundary layer is damaged in axial cyclic, the thickness in fluid heat transferring boundary layer can attenuate, further improves convection transfer rate.
The course of work of the present utility model is as follows:
The utility model tube body 1 is fixed on the tube sheet 7 of heat exchanger 6 (evaporimeter), in refrigerating medium (as water) is flowed through the pipe of utility model tube body 1 from hydroecium inlet 12, with the outer cold-producing medium heat exchange of pipe, again from hydroecium outlet 11 outflows; Cold-producing medium passes through spray head 13 sprays on heat exchanger top or drips to drench at the utility model outer wall, under the heating of pipe outer wall, evaporate, become gas, from exporting 10 outflow heat exchangers, unevaporated liquid continues circulation by 8 dozens of circulating pumps to spray head 13, because cold-producing medium evaporation heat absorption, the refrigerating medium in the utility model pipe is cooled.Because the outer wall configuration of aforesaid tube body 1 helps spraying the diffusivity of the cold-producing medium liquid film outside pipe, and prolong liquid film, thereby effectively promote evaporation heat transfer coefficient in the surface time of staying; And in pipe, three-dimensional internal thread structure can effectively improve the intraductal heat exchange coefficient, thereby the whole coefficient of heat transfer is improved, and has also increased the performance of heat exchanger 6 and has reduced metal consumption.
The utility model compared with prior art has following advantage and effect:
(1) because trapezoidal protrusion wing platform and wing root groove are set, compare with traditional continuously circumferential fin, heat exchanger tube axial and circumferential hydrophily all improves greatly, has improved the heat transfer property of cold-producing medium film droping heat-transfer;
(2) three-dimensional intersection internal thread has further improved convection transfer rate in the pipe, the occasion of turbulent convection heat transfer' heat-transfer by convection in being particularly suitable for managing;
(3) can adopt the disposal molding processing technology, the working (machining) efficiency height, the wing height that it is lower, common relatively male-pipe can be saved the matrix raw material more than 30%.
Description of drawings
Fig. 1 is that the utility model appearance over glaze is surveyed schematic diagram.
Fig. 2 is that the utility model inner surface axle is surveyed schematic diagram.
Fig. 3 is the utility model profile.
Fig. 4 is the utility model cross-sectional view.
Fig. 5 is the utility model application implementation illustration.
Number in the figure: 1 is tube body, and 2 is the wing platform, and 3 is the wing groove, and 4 is internal thread, and 5 is groove, and 6 is heat exchanger, and 7 is tube sheet, and 8 is circulating pump, and 9 is refrigerant inlet, and 10 is refrigerant outlet, and 11 are the hydroecium outlet, and 12 are the hydroecium inlet, and 13 is spray head.
The specific embodiment
Further specify the utility model below by embodiment, but be not limited to present embodiment.
The shape of wing platform 2 is cubic taper type, because frustum forms domaticly, is beneficial to the diffusion of cold-producing medium (water); Axially the wing spacing is 2.31mm, and wing platform 2 axial lengths are 1.8mm, and wing platform 2 circumferential lengths are 0.6mm.By the quantity of Fig. 3 circumference upper fin platform is 40-80, forms long channel along axis wing interstation like this, helps water in axial diffusion with prolong water in the time of staying on surface, is convenient to the liquid film evaporation heat exchange.The height of wing platform 2 is 0.65mm, and too high height is unfavorable for the tube-surface hydrophily, and consumes many, the low excessively wing platforms of basepipe materials, and its heat exchange area is less.Wing root groove is a rectangle, and the degree of depth of wing root groove is 0.08mm, and rectangle length provides the gasification core of the circumferential current of wing root like this less than 0.5mm, steams the method heat exchange and is reinforced.
The utility model can process internal thread simultaneously in pipe, with the coefficient of heat transfer in the enhanced tube, the height of tube body internal thread is high more, number of starts is many more, its intraductal heat exchange is strengthened also many more, but has also increased the resistance of tube fluid simultaneously, so the height of internal thread 4 is 0.3mm, with the angle C of axis be 46 degree, number of starts is 24.Because the outer wing platform of pipe is provided with and processing, in pipe, can nature formation groove 5 internal thread be pressed the fixed range partition, formed three-dimensional inside strengthening surface like this, compare common internal thread, further increase heat exchange area, the fluid heat transferring boundary layer is damaged in axial cyclic simultaneously, but therefore the thickness in attenuate fluid heat transferring boundary layer can improve convection transfer rate.
Claims (5)
1, a kind of two-sided strengthened falling film type heat-transfer pipe, the outer surface that it is characterized in that tube body (1) is along the bossed wing platform (2) that circumferentially distributes, and the edge is circumferentially with wing root groove (3) between the wing platform (2); The inner surface of tube body (1) is distributed with the internal thread (4) of rifling formula, and the edge is fluted (5) circumferentially, and circumferential recess (5) position is corresponding with the outer corresponding wing platform (2) of pipe, and the internal thread (4) of tube body (1) is by evenly separation of circumferential recess (5).
2, two-sided strengthened falling film type heat-transfer pipe according to claim 1, it is characterized in that the axial spacing between the wing platform (2) of tube outer surface is 0.8～2.8mm, the axial length of wing platform (2) is 0.5～1.87mm, circumferential lengths gets final product less than axial length, and the height of wing platform (2) is 0.35～0.8mm.
3, two-sided strengthened falling film type heat-transfer pipe according to claim 1 is characterized in that the rectangular or round point shape of wing root groove (3), and the degree of depth of wing root groove (3) is 0.04～0.12mm.
4, two-sided strengthened falling film type heat-transfer pipe according to claim 1 is characterized in that the height of the internal thread (4) of tube body (1) is 0.15～0.4mm, is 40～46 degree with the angle of axis, and number of starts is 8～30.
5, two-sided strengthened falling film type heat-transfer pipe according to claim 1 is characterized in that the shape of wing platform (2) is cubic taper type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520042093 CN2798021Y (en) | 2005-06-02 | 2005-06-02 | Two surface stengthened falling-film type heat transfer tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520042093 CN2798021Y (en) | 2005-06-02 | 2005-06-02 | Two surface stengthened falling-film type heat transfer tube |
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| Publication Number | Publication Date |
|---|---|
| CN2798021Y true CN2798021Y (en) | 2006-07-19 |
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| CN 200520042093 Expired - Fee Related CN2798021Y (en) | 2005-06-02 | 2005-06-02 | Two surface stengthened falling-film type heat transfer tube |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813433A (en) * | 2010-03-18 | 2010-08-25 | 金龙精密铜管集团股份有限公司 | Enhanced heat transfer tube for condensation |
| CN101338987B (en) * | 2007-07-06 | 2011-05-04 | 高克联管件(上海)有限公司 | Heat transfer pipe for condensation |
| CN101338959B (en) * | 2008-01-11 | 2011-06-08 | 高克联管件(上海)有限公司 | Efficient shell and tube type condenser |
| CN102121804A (en) * | 2011-03-04 | 2011-07-13 | 无锡化工装备有限公司（原无锡化工装备总厂) | Fixed tube-sheet heat exchanger with grooved parent tube surfaces |
| CN102401598A (en) * | 2011-11-23 | 2012-04-04 | 苏州新太铜高效管有限公司 | Falling film evaporation heat exchange pipe |
| CN102581583A (en) * | 2011-01-14 | 2012-07-18 | 浙江宏天铜业有限公司 | Copper heat tube with high-tooth fins and production technology of copper heat tube |
| CN102671399A (en) * | 2012-05-23 | 2012-09-19 | 中国化学工程第十一建设有限公司 | Reboiler |
| CN102138057B (en) * | 2008-07-24 | 2013-01-02 | 丰田自动车株式会社 | Heat exchanger and method of manufacturing same |
| CN102980432A (en) * | 2012-11-12 | 2013-03-20 | 沃林/维兰德传热技术有限责任公司 | Evaporation heat transfer pipe with hollow cavity body |
| CN103017593A (en) * | 2012-12-13 | 2013-04-03 | 吉林大学 | Bionic surface structure for strengthening evaporation heat exchanging of liquid film |
| CN103157965A (en) * | 2011-12-12 | 2013-06-19 | 浙江宏天铜业有限公司 | Production technology of high-tooth fin copper heat tube |
| CN104006579A (en) * | 2014-05-20 | 2014-08-27 | 江苏萃隆精密铜管股份有限公司 | Efficient heat-exchange tube for evaporator |
| CN105300161A (en) * | 2014-07-11 | 2016-02-03 | 杭州三花研究院有限公司 | Heat exchanger and cooling fin thereof |
| CN106767099A (en) * | 2016-12-20 | 2017-05-31 | 江苏萃隆精密铜管股份有限公司 | A kind of efficient heat conducting tube of inner surface enhanced type |
| CN108020110A (en) * | 2016-10-31 | 2018-05-11 | 中国科学院工程热物理研究所 | There is the heat exchanger tube for managing outer microflute group for function of mechanical steam recompression system |
| CN110195994A (en) * | 2019-04-29 | 2019-09-03 | 西安交通大学 | A kind of high efficiency composition bilateral augmentation of heat transfer pipe |
| CN111288831A (en) * | 2020-03-07 | 2020-06-16 | 广东龙丰精密铜管有限公司 | Falling film type efficient outer finned tube |
-
2005
- 2005-06-02 CN CN 200520042093 patent/CN2798021Y/en not_active Expired - Fee Related
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338987B (en) * | 2007-07-06 | 2011-05-04 | 高克联管件(上海)有限公司 | Heat transfer pipe for condensation |
| CN101338959B (en) * | 2008-01-11 | 2011-06-08 | 高克联管件(上海)有限公司 | Efficient shell and tube type condenser |
| CN102138057B (en) * | 2008-07-24 | 2013-01-02 | 丰田自动车株式会社 | Heat exchanger and method of manufacturing same |
| CN101813433A (en) * | 2010-03-18 | 2010-08-25 | 金龙精密铜管集团股份有限公司 | Enhanced heat transfer tube for condensation |
| CN101813433B (en) * | 2010-03-18 | 2012-10-24 | 金龙精密铜管集团股份有限公司 | Enhanced heat transfer tube for condensation |
| US9683791B2 (en) | 2010-03-18 | 2017-06-20 | Golden Dragon Precise Copper Tube Group Inc. | Condensation enhancement heat transfer pipe |
| CN102581583A (en) * | 2011-01-14 | 2012-07-18 | 浙江宏天铜业有限公司 | Copper heat tube with high-tooth fins and production technology of copper heat tube |
| CN102121804A (en) * | 2011-03-04 | 2011-07-13 | 无锡化工装备有限公司（原无锡化工装备总厂) | Fixed tube-sheet heat exchanger with grooved parent tube surfaces |
| CN102401598A (en) * | 2011-11-23 | 2012-04-04 | 苏州新太铜高效管有限公司 | Falling film evaporation heat exchange pipe |
| CN103157965A (en) * | 2011-12-12 | 2013-06-19 | 浙江宏天铜业有限公司 | Production technology of high-tooth fin copper heat tube |
| CN102671399A (en) * | 2012-05-23 | 2012-09-19 | 中国化学工程第十一建设有限公司 | Reboiler |
| CN102671399B (en) * | 2012-05-23 | 2014-07-16 | 中国化学工程第十一建设有限公司 | Reboiler |
| CN102980432A (en) * | 2012-11-12 | 2013-03-20 | 沃林/维兰德传热技术有限责任公司 | Evaporation heat transfer pipe with hollow cavity body |
| CN103017593B (en) * | 2012-12-13 | 2014-06-18 | 吉林大学 | Bionic surface structure for strengthening evaporation heat exchanging of liquid film |
| CN103017593A (en) * | 2012-12-13 | 2013-04-03 | 吉林大学 | Bionic surface structure for strengthening evaporation heat exchanging of liquid film |
| CN104006579A (en) * | 2014-05-20 | 2014-08-27 | 江苏萃隆精密铜管股份有限公司 | Efficient heat-exchange tube for evaporator |
| CN104006579B (en) * | 2014-05-20 | 2016-03-02 | 江苏萃隆精密铜管股份有限公司 | A kind of high-efficient heat-exchanger of evaporimeter |
| CN105300161B (en) * | 2014-07-11 | 2018-06-01 | 杭州三花研究院有限公司 | Heat exchanger and its radiating fin |
| CN105300161A (en) * | 2014-07-11 | 2016-02-03 | 杭州三花研究院有限公司 | Heat exchanger and cooling fin thereof |
| CN108020110A (en) * | 2016-10-31 | 2018-05-11 | 中国科学院工程热物理研究所 | There is the heat exchanger tube for managing outer microflute group for function of mechanical steam recompression system |
| CN106767099A (en) * | 2016-12-20 | 2017-05-31 | 江苏萃隆精密铜管股份有限公司 | A kind of efficient heat conducting tube of inner surface enhanced type |
| CN110195994A (en) * | 2019-04-29 | 2019-09-03 | 西安交通大学 | A kind of high efficiency composition bilateral augmentation of heat transfer pipe |
| CN110195994B (en) * | 2019-04-29 | 2021-07-13 | 西安交通大学 | High-efficiency composite double-side reinforced heat transfer pipe |
| CN111288831A (en) * | 2020-03-07 | 2020-06-16 | 广东龙丰精密铜管有限公司 | Falling film type efficient outer finned tube |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |