US20100193172A1 - Fin for a heat exchanger - Google Patents

Fin for a heat exchanger Download PDF

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Publication number
US20100193172A1
US20100193172A1 US12/697,586 US69758610A US2010193172A1 US 20100193172 A1 US20100193172 A1 US 20100193172A1 US 69758610 A US69758610 A US 69758610A US 2010193172 A1 US2010193172 A1 US 2010193172A1
Authority
US
United States
Prior art keywords
face
edge
tab
fin
fin according
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.)
Abandoned
Application number
US12/697,586
Other languages
English (en)
Inventor
Hermann Knaus
Florian Schmidt
Stefan ROESLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Assigned to BEHR GMBH & CO. KG reassignment BEHR GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROESLER, STEFAN, KNAUS, HERMANN, SCHMIDT, FLORIAN
Publication of US20100193172A1 publication Critical patent/US20100193172A1/en
Abandoned legal-status Critical Current

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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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F28F1/128—Fins with openings, e.g. louvered fins
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • 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
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips

Definitions

  • the invention relates to a fin for a heat exchanger.
  • Heat exchangers are known in which fins are provided in channels through which fluid flows in order to improve the capacity of the exchanger.
  • Such fins can be designed, for example, in the form of smooth fins, gill-shaped fins or also in the form of web fins.
  • Web fins show a particularly clear improvement in the performance of the exchanger for a given size, but also often mean an undesirably large drop in pressure across the flow channel.
  • web fins are used in charge air coolers of motor vehicles, predominantly on the charge air side.
  • DD 0 152 187 describes a strip-shaped tubular installation element for tube bundle heat exchangers in the petrochemical industry field with which trapezoidal flaps are provided for producing turbulence.
  • the flaps have a variable width in the flow direction, wherein the flaps are bent out from the strip by an angle of more than 30° about a longer of two parallel edges of the trapezium.
  • an improved air flow is achieved in the area of the flaps, as a result of which a greater quantity of heat is transmitted between air and fin for a given drop in pressure.
  • the first edge, end-side edges of the side walls, and a second straight edge of the wall can form a rectangle which is oriented perpendicularly to the flow direction and through which the first fluid can flow.
  • a long side of the rectangle can correspond to the first edge and can have a length which is approximately five times the length of short side of the rectangle.
  • the length of the tab face in the flow direction is approximately eight times the length of the short sides of the rectangle.
  • the flap can be designed mirror-symmetrically with respect to a central plane of symmetry, and furthermore a width of the tab face preferably reduces with increasing distance from the first edge.
  • an end of the tab face opposite the first edge has a smallest width, wherein the smallest width advantageously is no more than one tenth, in particular about one twelfth of the length of the first edge.
  • the curve of one of the side walls also has at least one point of inflection in its course with regard to the direction of curvature.
  • the inclination of the tab face with respect to the wall face is approximately seven degrees. Overall, this provides a hood-like tab with a particularly low drop in pressure with good heat transfer of the air flowing through it, as has been shown by trials.
  • the shape of the tab face starting from the first edge can have approximately the parameterisation [0; 2.500], [0.805; 2.470], [1.610; 2.290], [2.420; 1.910], [3.220; 1.540], [4.030; 1.210], [4.840; 0.980], [5.640; 0.780], [6.440; 0.590], [7.240; 0.400], [8.050; 0.210].
  • This parameterisation is understood to mean that the first value in each case specifies the distance from the first edge and the second value in each case specifies the distance from a central axis of symmetry to one of the two mirror-symmetrical side walls. Apart from a considerable scaling factor, this parameterisation corresponds to the shape of the air inlet described in the NACA report RM A9L29.
  • the fin can have a plurality of flaps arranged one after the other in the direction of flow, which, particularly in the case of long fins, results in an expedient arrangement for the purpose of deflecting the air several times over the length of the fin. Otherwise, the air flow would only be advantageously affected by the flap over part of the fin.
  • At least two flaps with different opening directions can be provided in the wall face.
  • heat can be exchanged with the flowing air particularly uniformly on both sides of the fin.
  • the invention also relates to a heat exchanger having at least one fin.
  • FIG. 1 shows a spatial representation of a first exemplary embodiment of a fin according to the invention
  • FIG. 2 shows a scale plan view on a flap of a fin according to the invention from above;
  • FIG. 3 shows a spatial representation of a second exemplary embodiment of a fin according to the invention.
  • the exemplary embodiment of the invention shown in FIG. 1 comprises a fin 1 made from an aluminium sheet which has been folded several times.
  • a flow channel 2 through which a first fluid of the heat exchanger, in this case air, flows in the direction of the arrow A or also in the opposite direction as shown by the arrow A′, is formed between two parallel wall faces 1 a .
  • the heat exchanger is designed so that a plurality of the fins 1 are arranged adjacent to one another to form parallel adjacent flow channels 2 .
  • Exchanger tubes or separating walls (not shown), which form the boundary of a second fluid, are connected to the surface of the fins 1 above and below the fins 1 .
  • a flap 3 which has a smooth tab face 4 and is inclined with respect to the sidewall 1 a is arranged in at least one of the side walls 1 a of the fin 1 .
  • the angle of inclination is approximately 7°.
  • the tab face 4 has a first straight edge 5 which extends perpendicular to the flow direction A, A′ and parallel to the wall face 1 a.
  • a cutout which is coincident with the tab face and which has a second straight edge 6 is provided in the wall face 1 a.
  • the tab face 4 is connected to the wall face 1 a of the fin by means of two side walls 7 , 8 which have a curved profile and are arranged mirror-symmetrically with respect to an axis of symmetry S of the flap and to each other.
  • the side walls 7 , 8 of the flap are perpendicular to the wall face 1 a of the fin 1 .
  • the height of the side walls 7 , 8 increases in the flow direction A and decreases in the opposite, likewise possible, flow direction A′.
  • edges 7 a, 8 a with the maximum height of the side walls 7 , 8 are formed at the end and lie in one plane with the first straight edge 5 of the tab face and the second straight edge 6 of the wall face 1 a , wherein the four edges 5 , 6 , 7 a, 8 a form a rectangular aperture or opening 9 perpendicular to the wall face 1 a .
  • the rectangle 9 has a side ratio of 1:5, the long sides of the rectangle being formed by the first and second straight edge 5 , 6 .
  • the curved, mirror-symmetrical side walls 7 , 8 are initially at a smallest distance from one another at their beginning, the distance growing steadily over the length L of the tab face.
  • the side walls run approximately parallel to the axis of symmetry S so that at the end of their path they meet the first and second straight edge 5 , 6 approximately at right angles (see FIG. 2 ).
  • the length L of the tab face 4 is approximately eight times the maximum height of the side walls 7 , 8 .
  • the side walls 7 , 8 change their direction of curvature approximately halfway through their path so that the curve has exactly one point of inflection.
  • a parameterisation of the path of the side walls of the preferred exemplary embodiment is:
  • the first number of a coordinate pair [x; y] in each case means the distance starting from the first edge 6 in the direction of the axis of symmetry S, that is to say in the opposite direction to the flow direction A.
  • the second number y describes the perpendicular distance of a side wall from the axis of symmetry S at this point.
  • the side walls 7 , 8 have a maximum height of approximately 1.0 and the maximum width B of the tab face 4 which runs along the first straight edge is correspondingly 5.0.
  • the air flowing through the flow channel 2 along the wall face 1 a can pass through the opening 9 , wherein it both swirls and is exchanged with an adjacent flow channel.
  • the ascending path of the tab face and the curved diverging side walls result in a form which is particularly favourable for dynamic flow and which achieves a good exchange of heat with a low drop in pressure.
  • FIG. 3 An improvement of the fin according to the invention is shown in FIG. 3 in which a plurality of flaps 3 are arranged one behind the other in the direction of flow.
  • two consecutive flaps are shown reversed with regard to their opening direction in the wall face 1 a , that is to say alternating. This achieves a uniform and optimum swirling of the air particularly with long flow channels 2 .

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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US12/697,586 2007-07-31 2010-02-01 Fin for a heat exchanger Abandoned US20100193172A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEDE102007036308.9 2007-07-31
DE102007036308A DE102007036308A1 (de) 2007-07-31 2007-07-31 Rippe für einen Wärmetauscher
PCT/EP2008/005983 WO2009015805A1 (de) 2007-07-31 2008-07-22 Rippe für einen wärmetauscher

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/005983 Continuation WO2009015805A1 (de) 2007-07-31 2008-07-22 Rippe für einen wärmetauscher

Publications (1)

Publication Number Publication Date
US20100193172A1 true US20100193172A1 (en) 2010-08-05

Family

ID=39968008

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/697,586 Abandoned US20100193172A1 (en) 2007-07-31 2010-02-01 Fin for a heat exchanger

Country Status (6)

Country Link
US (1) US20100193172A1 (de)
EP (1) EP2185884B1 (de)
CN (1) CN101790671B (de)
AT (1) ATE494521T1 (de)
DE (2) DE102007036308A1 (de)
WO (1) WO2009015805A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180335263A1 (en) * 2017-05-17 2018-11-22 Mahle International Gmbh Heat exchanger

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2096397B1 (de) * 2007-10-08 2015-01-21 Behr GmbH & Co. KG Rippe für einen Wärmetauscher
CN103245248A (zh) * 2012-02-10 2013-08-14 上海协合散热器制造有限公司 一种新型矩形散热带
NL2019040B1 (en) * 2017-06-09 2018-12-17 Optixolar Holding B V Heat sink panel for a photovoltaic panel
CN110307745A (zh) * 2019-07-15 2019-10-08 浙江工业大学 一种带犁形微凸的板翅式换热器翅片

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1689271A (en) * 1926-09-17 1928-10-30 Perfex Corp Radiator
US3265127A (en) * 1963-10-21 1966-08-09 Ford Motor Co Heat exchange element
US4615384A (en) * 1983-06-30 1986-10-07 Nihon Radiator Co., Ltd. Heat exchanger fin with louvers
US4676304A (en) * 1985-01-15 1987-06-30 Sanden Corporation Serpentine-type heat exchanger having fin plates with louvers
US4709753A (en) * 1986-09-08 1987-12-01 Nordyne, Inc. Uni-directional fin-and-tube heat exchanger
US5669438A (en) * 1996-08-30 1997-09-23 General Motors Corporation Corrugated cooling fin with louvers
US5787972A (en) * 1997-08-22 1998-08-04 General Motors Corporation Compression tolerant louvered heat exchanger fin
US6957694B2 (en) * 2001-03-16 2005-10-25 Calsonic Kansei Corporation Core structure of integral heat-exchanger
US20070107882A1 (en) * 2003-10-28 2007-05-17 Behr Gmbh & Co. Kg Flow channel for a heat exchanger, and heat exchanger comprising such flow channels
US20090090497A1 (en) * 2007-10-08 2009-04-09 Behr Gmbh & Co. Kg Fin for a heat exchanger and manufacturing method

Family Cites Families (11)

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GB1116621A (en) * 1963-12-27 1968-06-12 Ass Eng Ltd Improvements in or relating to heat exchangers
JPS5694194A (en) * 1979-12-27 1981-07-30 Taisei Kogyo Kk Water cooling type oil cooler
DD152187A1 (de) 1980-07-23 1981-11-18 Ernst Roth Streifenfoermiges rohreinbauelement
JPS62112997A (ja) * 1985-11-08 1987-05-23 Matsushita Refrig Co 熱交換器
US4815532A (en) * 1986-02-28 1989-03-28 Showa Aluminum Kabushiki Kaisha Stack type heat exchanger
JPH0769114B2 (ja) * 1986-05-31 1995-07-26 カルソニック株式会社 熱交換器用フインの製造方法
JP3731247B2 (ja) * 1996-04-26 2006-01-05 株式会社デンソー 熱交換器
FR2824895B1 (fr) * 2001-05-18 2005-12-16 Air Liquide Ailette ondulee a persiennes pour echangeur de chaleur a plaques, et echangeur a plaques muni de telles ailettes
AU2003270279A1 (en) * 2002-09-28 2004-04-23 Ebm-Papst St. Georgen Gmbh And Co. Kg Arrangement and method for removing heat from a component which is to be cooled
EP1606569B1 (de) * 2003-03-26 2007-06-27 Calsonic Kansei Corporation Innere rippe mit ausgeschnittenem fenster für wärmetauscher
DE202004013882U1 (de) * 2004-09-03 2006-01-12 Autokühler GmbH & Co. KG Wärmeübertragungsbauteil und damit hergestellter Wärmeaustauscher

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1689271A (en) * 1926-09-17 1928-10-30 Perfex Corp Radiator
US3265127A (en) * 1963-10-21 1966-08-09 Ford Motor Co Heat exchange element
US4615384A (en) * 1983-06-30 1986-10-07 Nihon Radiator Co., Ltd. Heat exchanger fin with louvers
US4676304A (en) * 1985-01-15 1987-06-30 Sanden Corporation Serpentine-type heat exchanger having fin plates with louvers
US4709753A (en) * 1986-09-08 1987-12-01 Nordyne, Inc. Uni-directional fin-and-tube heat exchanger
US5669438A (en) * 1996-08-30 1997-09-23 General Motors Corporation Corrugated cooling fin with louvers
US5787972A (en) * 1997-08-22 1998-08-04 General Motors Corporation Compression tolerant louvered heat exchanger fin
US6957694B2 (en) * 2001-03-16 2005-10-25 Calsonic Kansei Corporation Core structure of integral heat-exchanger
US20070107882A1 (en) * 2003-10-28 2007-05-17 Behr Gmbh & Co. Kg Flow channel for a heat exchanger, and heat exchanger comprising such flow channels
US20090090497A1 (en) * 2007-10-08 2009-04-09 Behr Gmbh & Co. Kg Fin for a heat exchanger and manufacturing method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Martin et al., An Experimental Investigation at Large Scale of Several Configurations of an NACA Submerged Air Intake. NACA RM a8F21, 1948. *
Mossman et al., An Experimental Investigation of the Design Variables for NACA Submerged Duct Entrances. NACA RM A7I30, 1948. *
Ross et al., Tests of a Small-Scale NACA Submerged Inlet at Transonic Mach Numbers NACA RM A9L29 of the National, 1950. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180335263A1 (en) * 2017-05-17 2018-11-22 Mahle International Gmbh Heat exchanger
US10883773B2 (en) * 2017-05-17 2021-01-05 Mahle International Gmbh Heat exchanger with a separator

Also Published As

Publication number Publication date
CN101790671A (zh) 2010-07-28
WO2009015805A1 (de) 2009-02-05
DE502008002244D1 (de) 2011-02-17
WO2009015805A8 (de) 2010-06-24
CN101790671B (zh) 2012-06-27
ATE494521T1 (de) 2011-01-15
EP2185884B1 (de) 2011-01-05
EP2185884A1 (de) 2010-05-19
DE102007036308A1 (de) 2009-02-05

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AS Assignment

Owner name: BEHR GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KNAUS, HERMANN;SCHMIDT, FLORIAN;ROESLER, STEFAN;SIGNING DATES FROM 20100214 TO 20100225;REEL/FRAME:024253/0933

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION