EP2909560A1 - Flachrohr - Google Patents
FlachrohrInfo
- Publication number
- EP2909560A1 EP2909560A1 EP13756175.9A EP13756175A EP2909560A1 EP 2909560 A1 EP2909560 A1 EP 2909560A1 EP 13756175 A EP13756175 A EP 13756175A EP 2909560 A1 EP2909560 A1 EP 2909560A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flat
- projections
- walls
- flat tube
- interior
- Prior art date
- 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.)
- Granted
Links
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000004049 embossing Methods 0.000 description 7
- 238000007373 indentation Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
-
- 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
- F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
-
- 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
-
- 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
-
- 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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- 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
- F28F2001/027—Tubular elements of cross-section which is non-circular with dimples
Definitions
- the invention relates to a flat tube with two oppositely disposed substantially parallel first walls and with two connecting the two flat first walls arcuate second walls, with an interior for the flow of a medium, wherein in at least one of the flat first walls projecting into the interior Projections are provided.
- the invention also relates to a heat exchanger with such flat tubes.
- flat tubes have been known as so-called rectangular tubes, which have two flat, broad side walls, which are connected by flat side walls. The corners between the flat wide and the flat side walls are provided with a small radius.
- These flat tubes are essentially rectangular and are used for various types of heat exchanger.
- these rectangular tubes are provided with projections projecting into the interior in order to improve the heat transfer between the flowing exhaust gas and the wall.
- the projections are also referred to as winglets.
- Outwardly projecting projections are also used as spacers between adjacent flat tubes, see also DE 10 2004 045 923 A1.
- flat round flat tubes which have two flat wide side walls which are connected by arcuate side walls. These flat tubes are formed substantially rectangular-like with bulged side walls and are also used for different heat exchanger types.
- these flat-round flat tubes are provided with projections projecting into the interior in the flat, broad side walls, in order to improve the heat transfer between the exhaust gas flowing through and the wall. Since, however, in these flat tubes, the width of the flat side wall is reduced compared to the rectangular tubes, because the lateral arc requires more space than a rectangular tube, the flat side wall, the embossed projections are narrower and the projections can not protrude into the regions of the fillets , This causes a reduced heat transfer in the flat round flat tube compared to the rectangular tube. Comparative measurements show reductions of up to 10%.
- the flat-round flat tubes have the advantage that they show a significantly higher service life in thermoelectric loads than comparable rectangular tubes, since the fillets have a higher strength than the flat side walls of the rectangular tubes.
- An embodiment of the invention relates to a flat tube with two oppositely disposed substantially parallel first walls and with two connecting the two flat first walls arcuate second walls, with an interior for flowing through an edum, wherein in at least one of the flat first walls are provided in the interior protruding projections, wherein in the arcuate second walls in the interior protruding projections are provided.
- both opposing flat first walls each have projections projecting into the interior space. This leads to an increased power density.
- both opposing arcuate second walls have protrusions protruding into the interior space.
- the power density is increased because projecting projections are now provided on both end-side fillets.
- at least one, preferably both, of the two opposite flat first walls have outwardly directed projections.
- nubs are created as spacers between adjacent flat tubes, so that the distance of the tubes is defined and the flat tubes can touch only in small areas.
- the inwardly directed projections of the flat first walls are arranged at a first repetition rate along the longitudinal axis of the flat tube. This results in a simpler production because the projections can be embossed periodically by means of embossing rollers or correspondingly repeating embossing tools.
- the inwardly directed projections of the arcuate second walls are arranged at a second repetition rate along the longitudinal axis of the flat tube.
- the projections can also be generated periodically by means of simplified tool design.
- a repetition rate is an integer multiple, including 1, the other repetition rate. This limits the overall period length, which in turn facilitates a length variation of the tubes, and reduces the expense of periodically repeating tools.
- the second repetition rate is twice as high as the first repetition rate.
- the same power densities could be achieved with the flat-round flat tube, with the same pressure drop, as with a comparable rectangular tube.
- the protruding projections of the flat first walls are arranged in an X-shaped and / or O-shaped manner. As a result, an optimized flow can be achieved. It is particularly advantageous if the outwardly projecting projections of the flat walls are arranged between the o-shaped protrusions of the first wall which project into the interior space.
- the protrusions of opposing first walls projecting into the interior space are arranged complementary to one another so that an x-shaped arrangement in a first wall lies opposite an o-shaped arrangement opposite an opposite first wall.
- an improved formation of turbulence is achieved.
- the projections provided in the arcuate second walls and projecting into the interior space have an oval cross-section.
- a projection in the arcuate second wall is arranged substantially at the level of the center of a projection in the flat first wall.
- a favorable pipe design is created because the pipe constrictions are not arranged by the projections at the same height, which limits the pressure drop increase.
- at least one end region or preferably both end regions of the roofing tube is or are formed without projections. This improves the boiling prevention in the tube of the heat exchanger.
- the end regions have a length of about 5 mm to 50 mm, these end regions for the various projections can be different lengths. Preferably, 15 mm without any kind of projections and another 30mm without protrusions are performed to the outside.
- At least one end region or preferably both end regions of the flat tube is or are formed without projections. This is particularly advantageous because Wtngtets, knobs and dents do not start on the same longitudinal coordinate of the pipe and / or must end.
- the object of the present invention with respect to the heat exchanger is achieved by a heat exchanger with the features of claim 16.
- FIG. 1 a shows a schematic view of a flat tube in a view from above
- FIG. 1 b shows a schematic view of a flat tube in a view from the side
- 1 c is a schematic view of a flat tube in a view from below
- Fig.ld a schematic view of a flat tube in a front view
- Fig.l e is a schematic view of a flat tube in a perspective view
- 2b shows a schematic view of a flat tube in a front view
- 2 c is a schematic view of a flat tube in a perspective view
- 3a a schematic view of a section of a flat tube in a view from above
- 3b shows a schematic view of a section of a flat tube in a view from below
- 3 c is a schematic view of a projection in an arcuate wall
- Figures 1 a to 1 e show an embodiment of a flat round flat tube
- the two flat first walls 2, 3 are substantially flat and arranged parallel to each other.
- the flat first walls 2, 3 are by means of arcuate second walls 4, 5 on the longitudinal side of the flat first walls
- the arcuate second walls 4, 5 are semicircular or otherwise arcuate, formed.
- the flat tube defines between the substantially flat first walls 2, 3 and the arcuate second walls 4, 5 an inner space 6 for the flow through the flat tube by means of a medium.
- the medium is preferably exhaust gas or an exhaust gas-air mixture.
- the flat tube is advantageously used as a tube of an exhaust gas cooler or intercooler.
- projections 7 are impressed, which protrude into the interior 6 of the flat tube 1 in order to achieve there a turbulence of the flowing through the flat tube 1 medium.
- the projections 7 are stamped as elongated projections 7 in the flat first wall 2, 3.
- the projections 7 are x- shaped and o-shaped arranged in the opposite walls 2, 3 embossed »wherein the x-shaped indentations 8 alternate with the o-shaped indentations 9 viewed in the longitudinal direction of the flat tube 1.
- An o-shaped arrangement of projections means that four of the projections are arranged diamond-shaped, so that they form a quasi ⁇ .
- An x-shaped arrangement of projections means that four of the projections are arranged x- or star-shaped, so that they form an X virtually.
- outwardly directed projections 10 are provided, which can serve as spacers of adjacent flat tubes 1, wherein the outwardly projecting projections 10 are arranged in the region of the o-shaped projections arranged.
- the projections are arranged in the center of four o-shaped projections 7.
- the arrangement of the projections 7 on a wall 2 in comparison to the arrangement of the projections 7 on the opposite wall 3 is offset from each other.
- the arrangement of the outwardly projecting projections 10 is offset between opposite first walls 2, 3,
- the periodicity of the projections 7 is plotted with the repeat length L, wherein the periodicity of the projections 1 1 is designated by the repeat length I.
- the repeat length is the length after which the same pattern is repeated.
- the repeat length l is in the figures 1 a to 1 e half the repetition length L, so that the recovery rate of the projections 1 1 is twice as high as the repetition rate of the projections 7.
- the projections 11 are arranged opposite one another in both arcuate second walls 4, 5.
- the projections 11 of an arcuate wall 4 could also be arranged offset relative to the projections 11 of the opposite wall 5.
- FIGS. 2 a to 2 c show a further exemplary embodiment of a flat tube 21 according to the invention which, like the exemplary embodiment of FIGS. 1 a to 1 e, has substantially flat first walls 22, 23 which lie opposite one another and which are arranged parallel to one another.
- the first walls 22, 23 are formed by second arcuate walls 24, 25 connected to each other.
- projections, such as indentations, 27, 28 are provided in the flat first walls, which protrude from the first walls 22, 23.
- the projections 27 protrude into the interior 26 and the projections 28 protrude outward.
- projections 29 are also provided, which protrude into the interior 26.
- the arrangement of the projections 27, 28 corresponds substantially to the arrangement of the projections 7, 10 of Figures 1a to 1 e, wherein the arrangement of the projections 29 substantially corresponds to the arrangement of the projections 1 1 of Figures 1 a to 1 e.
- the difference between the embodiment of Figures 2a to 2c to the embodiment of Figures 1 a to 1 e is that the repeat length in the embodiment of Figures 2a to 2c the Wiederholpar L of the projections 27 corresponds.
- Figures 3a and 3b show the arrangement of a projection 29 in relation to the arrangement of the projections 27. It can be seen that the center 30 of the projection 29 is approximately at the same height as the center 31 of a projection 27. The projection 29 is thus centered to a projection 27 which is connected to a group of Jumps 27 is arranged in an O-shape, wherein in the center of the O-shaped arrangement, a projection 28 is arranged.
- FIG. 3 c shows by way of example the extension of a projection 29, wherein the extent transverse to the longitudinal direction of the flat tube, the embossing depth, is approximately 1.0 mm and the embossing radii and the outlet radii are each approximately 6.0 mm.
- the embossing depth of the projections 29 can usefully be selected in the range between 0.5 mm and 1, 2 mm in order to protrude sufficiently deep into the interior relative to the arcuate second wall.
- the impression is formed by a central recuperadtus with two marginal Auslaufradien.
- the length, transverse to the embossing depth can advantageously amount to several times the embossing depth.
- the projections 27 are arranged at an angle of approximately 22 ° to the longitudinal axis of the tube, wherein the projections 28 are round or oval, wherein, in the case of an oval shape, the longitudinal axis is arranged parallel to the longitudinal axis of the tube is.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012217333.1A DE102012217333A1 (de) | 2012-09-25 | 2012-09-25 | Flachrohr |
PCT/EP2013/068192 WO2014048688A1 (de) | 2012-09-25 | 2013-09-03 | Flachrohr |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2909560A1 true EP2909560A1 (de) | 2015-08-26 |
EP2909560B1 EP2909560B1 (de) | 2017-11-15 |
Family
ID=49085043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13756175.9A Active EP2909560B1 (de) | 2012-09-25 | 2013-09-03 | Flachrohr |
Country Status (4)
Country | Link |
---|---|
US (1) | US10520261B2 (de) |
EP (1) | EP2909560B1 (de) |
DE (1) | DE102012217333A1 (de) |
WO (1) | WO2014048688A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3270085A1 (de) * | 2016-07-12 | 2018-01-17 | Borgwarner Emissions Systems Spain, S.L.U. | Wärmetauscher für ein agr-system |
FR3069628A1 (fr) * | 2017-07-31 | 2019-02-01 | Valeo Systemes Thermiques | Tube pour echangeur de chaleur avec dispositif de perturbation |
WO2019025719A1 (fr) * | 2017-07-31 | 2019-02-07 | Valeo Systemes Thermiques | Tube pour echangeur de chaleur avec dispositif de perturbation |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5850693B2 (ja) * | 2011-10-05 | 2016-02-03 | 日野自動車株式会社 | 熱交換器用チューブ |
DE102014108463B4 (de) * | 2014-06-16 | 2020-03-05 | Fischer Edelstahlrohre Gmbh | Wärmeübertragerrohr, Wärmeübertrager und Verfahren zur Herstellung eines Wärmeübertragerrohrs |
CN105300157A (zh) * | 2014-07-08 | 2016-02-03 | 东风贝洱热系统有限公司 | 一种新型强化换热管 |
JP2017523375A (ja) | 2014-08-12 | 2017-08-17 | ダンフォス・マイクロ・チャンネル・ヒート・エクスチェンジャー・(ジャシン)・カンパニー・リミテッド | 熱交換用プレート及びプレート型熱交換器 |
CN104567522A (zh) * | 2014-10-29 | 2015-04-29 | 张博然 | 机翼式换热扁管 |
US20160123683A1 (en) * | 2014-10-30 | 2016-05-05 | Ford Global Technologies, Llc | Inlet air turbulent grid mixer and dimpled surface resonant charge air cooler core |
DE102015107927A1 (de) * | 2015-05-20 | 2016-11-24 | Volkswagen Aktiengesellschaft | Flachrohrkühler und Verfahren zur Herstellung eines Flachrohrs |
US20170010046A1 (en) * | 2015-07-08 | 2017-01-12 | Thermolift, Inc. | Heat Exchanger |
FR3063026B1 (fr) * | 2017-02-23 | 2019-05-10 | Valeo Systemes Thermiques | Echangeur de chaleur brase et procede de fabrication associe. |
KR20190133258A (ko) * | 2017-05-09 | 2019-12-02 | 아사히 인텍크 가부시키가이샤 | 열수축 튜브 |
DE102017222742A1 (de) * | 2017-12-14 | 2019-06-19 | Hanon Systems | Rohr, insbesondere Flachrohr für einen Abgaskühler und Abgaskühler |
DE102017223616A1 (de) * | 2017-12-21 | 2019-06-27 | Mahle International Gmbh | Flachrohr für einen Abgaskühler |
US11391523B2 (en) * | 2018-03-23 | 2022-07-19 | Raytheon Technologies Corporation | Asymmetric application of cooling features for a cast plate heat exchanger |
CN110887396B (zh) * | 2018-09-10 | 2021-03-05 | 浙江盾安热工科技有限公司 | 换热器扁管及具有其的换热器 |
CN111397426A (zh) * | 2020-03-16 | 2020-07-10 | 南京理工大学 | 一种减弱管道截面热分层的强化传热装置 |
FR3129716B1 (fr) * | 2021-11-30 | 2023-12-22 | Valeo Systemes Thermiques | Eléments de perturbation avancés pour l’amélioration de la performance des tubes |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2539971A1 (de) * | 1975-09-02 | 1977-03-10 | Becker Apparatebau Geb | Vorrichtung zum erhitzen von hochviskosen medien oder medien mit hochviskosen oder festen bestandteilen, insbesondere von maische |
IT1291636B1 (it) * | 1997-04-22 | 1999-01-19 | Whirlpool Co | Scambiatore di calore modulare particolarmente per macchine asciugabiancheria lavaasciugabiancheria e simili |
US6286201B1 (en) * | 1998-12-17 | 2001-09-11 | Livernois Research & Development Co. | Apparatus for fin replacement in a heat exchanger tube |
US6209629B1 (en) * | 1999-07-09 | 2001-04-03 | Visteon Global Technologies, Inc. | Beaded plate for a heat exchanger and method of making same |
CA2323026A1 (en) * | 2000-10-10 | 2002-04-10 | Long Manufacturing Ltd. | Heat exchangers with flow distributing orifice partitions |
EP1256772A3 (de) * | 2001-05-11 | 2005-02-09 | Behr GmbH & Co. KG | Wärmetauscher |
US7726390B2 (en) * | 2002-06-11 | 2010-06-01 | Erbslöh Aluminium Gmbh | Hollow chamber profile made of metal, especially for heat exchangers |
KR100950714B1 (ko) * | 2003-05-29 | 2010-03-31 | 한라공조주식회사 | 열교환기용 플레이트 |
DE102004045018B4 (de) | 2003-09-30 | 2019-08-01 | Mahle International Gmbh | Verfahren zur Herstellung eines flachen Rohres für einen Wärmetauscher eines Kraftfahrzeugs, flaches Rohr, Verfahren zur Herstellung eines Wärmetauschers und Wärmetauscher |
CN1875240B (zh) * | 2003-10-28 | 2010-10-13 | 贝洱两合公司 | 热交换器的流道以及带有这种流道的热交换器 |
US7182128B2 (en) * | 2005-03-09 | 2007-02-27 | Visteon Global Technologies, Inc. | Heat exchanger tube having strengthening deformations |
US8235098B2 (en) * | 2008-01-24 | 2012-08-07 | Honeywell International Inc. | Heat exchanger flat tube with oblique elongate dimples |
US8267163B2 (en) * | 2008-03-17 | 2012-09-18 | Visteon Global Technologies, Inc. | Radiator tube dimple pattern |
DE102008064090A1 (de) | 2008-12-19 | 2010-08-12 | Mahle International Gmbh | Abgaskühler |
DE102010005269A1 (de) * | 2010-01-20 | 2011-07-21 | Behr GmbH & Co. KG, 70469 | Wärmetauscherrohr und Verfahren zur Herstellung eines Wärmetauscherrohres |
DE102010003514A1 (de) | 2010-03-31 | 2011-10-06 | Behr Gmbh & Co. Kg | Wärmetauscher |
-
2012
- 2012-09-25 DE DE102012217333.1A patent/DE102012217333A1/de not_active Withdrawn
-
2013
- 2013-09-03 US US14/430,637 patent/US10520261B2/en not_active Expired - Fee Related
- 2013-09-03 EP EP13756175.9A patent/EP2909560B1/de active Active
- 2013-09-03 WO PCT/EP2013/068192 patent/WO2014048688A1/de active Application Filing
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2014048688A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3270085A1 (de) * | 2016-07-12 | 2018-01-17 | Borgwarner Emissions Systems Spain, S.L.U. | Wärmetauscher für ein agr-system |
FR3069628A1 (fr) * | 2017-07-31 | 2019-02-01 | Valeo Systemes Thermiques | Tube pour echangeur de chaleur avec dispositif de perturbation |
WO2019025719A1 (fr) * | 2017-07-31 | 2019-02-07 | Valeo Systemes Thermiques | Tube pour echangeur de chaleur avec dispositif de perturbation |
Also Published As
Publication number | Publication date |
---|---|
EP2909560B1 (de) | 2017-11-15 |
US10520261B2 (en) | 2019-12-31 |
US20150247680A1 (en) | 2015-09-03 |
WO2014048688A1 (de) | 2014-04-03 |
DE102012217333A1 (de) | 2014-03-27 |
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Owner name: MAHLE INTERNATIONAL GMBH |
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Inventor name: BRUNNER, STEFFEN Inventor name: HOLDENRIED, JENS Inventor name: HERBER, ACHIM Inventor name: STAUCH, RAINER |
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