EP0759139B1 - Wärmetauscher - Google Patents

Wärmetauscher Download PDF

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Publication number
EP0759139B1
EP0759139B1 EP95918810A EP95918810A EP0759139B1 EP 0759139 B1 EP0759139 B1 EP 0759139B1 EP 95918810 A EP95918810 A EP 95918810A EP 95918810 A EP95918810 A EP 95918810A EP 0759139 B1 EP0759139 B1 EP 0759139B1
Authority
EP
European Patent Office
Prior art keywords
sheet
package
flow
heat exchanger
casing
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.)
Expired - Lifetime
Application number
EP95918810A
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English (en)
French (fr)
Other versions
EP0759139A1 (de
Inventor
Björn Heed
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.)
Individual
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Individual
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Filing date
Publication date
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Publication of EP0759139A1 publication Critical patent/EP0759139A1/de
Application granted granted Critical
Publication of EP0759139B1 publication Critical patent/EP0759139B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0025—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by zig-zag bend plates

Definitions

  • the present invention concerns a recuperative heat exchanger for the transfer of heat between two media through a heat transferring wall, and a method of producing such a heat exchanger.
  • the invention relates to a heat exchanger of the type disclosed in FR-1 569 887, comprising a folded sheet of metal that is contained in a casing, which sheet comprises a pattern of corrugations forming crossing ridges in the folded condition.
  • Heat exchangers are used for the transfer of heat between two media flows of different temperatures.
  • heat is transferred from the hot medium through a separating wall to the cooler medium.
  • the design often comprises tubes inside which one of the media flows whereas the outer medium flows outside the tubes.
  • This type of heat exchanger is often called tube-and-shell heat exchangers. It is also common practice to separate the media by means of more or less flat separating plates. This type of heat exchangers is often called plate heat exchangers.
  • the heat exchanger is to serve its function of transferring heat it is important that the heat transfer surface area is as large as possible. This is often accomplished by dividing the media flows into multiple parallel part flows moving inside alternatingly juxtaposed passageways to form a unit with a large transfer surface area within a limited volume.
  • the devices that are necessary for the separation of the flows into parallel streams are often complicated and expensive to produce. Often, the specifications for inter-flow leak sealing are stringent.
  • the media change their temperature when passing through the heat exchanger.
  • the temperature of the hot medium gradually decreases and the temperature of the cooler medium gradually increases.
  • the flow geometry in the heat exchanger is such that the hottest part (the beginning) of the hot flow heats the hottest part (the end) of the cool flow and that the coldest part (the end) of the hot flow heats the coldest part (the beginning) of the cool flow.
  • Using such counter-current flow geometry in the heat exchanger makes it possible to achieve such a degree of heat exchange that the outgoing temperature of the cool flow is higher than the outgoing temperature of the hot flow. This is not possible when using a flow geometry where the media travel in the same direction through the heat exchanger, i.e. so called parallel flow heat exchangers.
  • objectives can be difficult to achieve. Especially objectives number 1 and 3 have proved difficult to achieve at the same time without causing high costs.
  • the present invention relates to a heat exchanger wherein all three objectives are met simultaneously while the costs are kept low.
  • a heat exchanger according to the invention preferably is produced as shown in Figure 1 from a continuous sheet 1 of metal, plastic or other suitable material which in the completed heat exchanger will serve as a heat transferring wall.
  • numeral references 2 and 3 denote rollers between which the sheet is fed in the direction of arrow 4.
  • the surfaces of the rollers are formed with patterns of oblique ridges and grooves 5 and 6.
  • the rollers are formed with ridges 7 and grooves 8 extending in parallel with the roller axis. Every ridge 7 corresponds to a groove 8 on the opposite roller. Accordingly, when the sheet passes between the rollers, the ridges 7 and the grooves 8 form folding lines 9 in the sheet.
  • the ends of the package 12 are closed by covering elements 13 which may be produced for instance by dipping the package ends into a compound that is soft from the beginning but after a while solidifies when cooling or by chemical reaction.
  • Numeral reference 14 relates to a sealing strip which is applied to one side of the package, e.g. the bottom part. A corresponding seal, not visible in the drawing, is applied to the opposite side of the package.
  • Numeral reference 15 denotes a box-shaped casing 15 generally, into which the package 12 is intended to be placed as indicated by arrow 16. When the package is thus placed inside the casing, the seal 14 will be forced against the bottom of the casing and the covering elements 13 will seal against the end walls 17 and 18 of the casing.
  • the width B of the package 12 essentially corresponds to the spacing between the side walls 19 and 20 of the casing while the height H of the package essentially corresponds to the height of the casing.
  • the casing 15 has a lid 21 the shape of which matches that of the open upper side of the casing 15 in Figure 1.
  • connecting ports 22 - 25 are arranged.
  • the connecting ports 22 and 25 serve as inlet and outlet ports respectively for one of the media and connecting ports 23 and 24 serve as inlet and outlet ports respectively for the other medium.
  • FIG 2 for the sake of clarity showing the upper part of the package slightly raised, illustrates the flow paths of the two media. The directions of flow are shown by arrows 26 for one of the media and with arrows 27 for the other medium.
  • the corrugations in one layer of the folded sheet will extend crosswise with respect to the corrugations in the next layer. These crossing corrugations formed in the facing sides of adjacent layers create a turbulent flow in the medium flowing between the layers. To a considerable extent, this will contribute to an efficient exchange of heat between the two media.
  • the shaped pattern was made by means of rollers, but the shaped pattern can also be accomplished by stamping.
  • the covering elements 13 are made of a solidifying compound.
  • layers of soft material between the ends of the package and the end walls of the outer casing thus form an outer shell that together with the seals 13 and 14 on the package 12 constitutes an efficient media flow separating and sealing means.
  • the seal shown in the figures could however, be made in a very simple and inexpensive manner.
  • the application of the sealing compound or other soft material can be made without high precision or geometrical exactness.
  • this shell is formed according to Figure 4 by a box 28 having a rectangular cross sectional shape.
  • the box On one side, the box is equipped with an inlet port 29 and an outlet port 30 for one of the media and on the other side with an inlet port 31 and an outlet port 32 for the other medium.
  • the package 12 is inserted through one open end of the box which thus forms a casing 33 which may be closed by lids 34 and 35.
  • the lids 34 and 35 are designed to seal against the ends of the package 12, either by themselves or by means of intermediate sealing layers.
  • the lower lid 34 in Figure 4 could for instance be fastened by means of a liquid sealing compound which is poured into the lid and which solidifies after the assembly 28, 12 has been dipped into it.
  • the other lid 35 can then be fastened in the same way after the assembly 28, 12 having been turned upside down.
  • This kind of moulding can also be used in the example shown in Figures 1 and 2.
  • the lids may be removed after the moulding operation and thus only serve as moulds in the moulding process.
  • the shaped pattern in the sheet serves at least three purposes. One is to establish a certain distance or pitch between successive layers in the folded sheet so that a medium can flow in the inter-layer space.
  • the shaped pattern should also promote turbulence in the flow as described earlier.
  • the simple pattern described above serves both these purposes.
  • the oblique corrugations form a system of crossing ridges.
  • the ridges maintain a certain spacing between the different folds and produce a tortuous, turbulence-inducing flow path for the medium which, as mentioned above, promotes heat transfer to the wall.
  • the two media flows are distributed over a number of parallel channels that are placed in alternating nesting position.
  • the third purpose of the shaped pattern is to achieve an evenly distribution of the flow sideways within and across each channel.
  • an essentially counter-current flow pattern is established between the two media flows even when their inlet and outlet ports do not extend in the prolongation of the flow direction.
  • the simple corrugation pattern which has been used as an example above is easy to produce between two helically cut rollers as in Figure 1. It is also well suited to fulfill the objects of keeping the spacing between the layers, and of promoting turbulence and lateral distribution of the flow as have been discussed above.
  • the corrugations are interrupted and replaced by folding lines at suitable spaced-apart intervals as shown in Figure 1.
  • Another improvement of the pattern would be to provide the inlet and outlet areas (the outer parts of the sheet) with a different pattern from the main part of the sheet area so as to give an efficient lateral distribution of the flow without making the lengthwise resistance to flow too high in the main part of the heat exchanger.
  • a reduction of the resistance to flow in the heat transferring part of the heat exchanger most often however involves a reduction of the heat transfer there, which is not desirable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (2)

  1. Rekuperativ-Wärmetauscher zum Wärmeaustausch zwischen zwei Medien über eine Wärmeübertragungswand aus einem gemusterten Form-Flächengebilde, das wiederholt gefaltet ist, um ein mehrlagiges Paket zu bilden, das in einem äußeren Gehäuse eingeschlossen ist, mit Anschlußöffnungen (22 - 25; 29 - 32) für die beiden Medien der beiden einander gegenüberliegenden Seiten des Pakets, wobei das Flächengebilde aufgrund seiner Form nach dem Falten ein Paket von abwechselnden Strömungskanälen bildet, wobei das Muster des Flächengebildes in Form von Wellungen vorliegt, die sich in einem schiefen Winkel zur Längserstreckung des ungefalteten Flächengebildes erstrecken und im gefalteten Zustand des Flächengebildes sich kreuzende Stege bilden, dadurch gekennzeichnet, daß die Wellungen im wesentlichen den gesamten Bereich des Flächengebildes bedecken, daß die Wellungen in geeigneten Abständen unterbrochen sind und durch Faltlinien (9) ersetzt werden, die in dem Flächengebilde ausgebildet sind, um das Falten des Flächengebildes zu erleichtern, wobei die Enden des durch die Längsseitenränder des Flächengebildes gebildeten Pakets von einer Dichtungsschicht (13) bedeckt sind und einander gegenüberliegende Seiten des Pakets, die sich zwischen den Enden erstrecken, ebenfalls mit Dichtungsstreifen (14) versehen sind, die auf einem unteren Flächengebildeteil und auf einem oberen Flächengebildeteil des gefalteten Pakets aufgebracht sind und sich zwischen den Enden erstrecken, wobei das Paket so an die Abmessungen des äußeren Gehäuses (15, 21; 28, 34, 35) angepaßt ist, daß das Paket, wenn es innerhalb des Gehäuses angeordnet ist, von diesem entlang den Dichtungen zwischen dem Paket und dem Gehäuse umgeben ist, wodurch jedes Medium auf seiner jeweiligen Seite der Seiten des gefalteten Flächengebildes in Verbindung mit seinen zugeordneten Anschlußöffnungen (22 - 25; 29 - 32) von dem anderen getrennt gehalten wird.
  2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß der Winkel der Wellungen zu der Längserstreckung des ungefalteten Flächengebildes kleiner ist als 45°, wodurch der Strömungswiderstand zu den Enden des Flächengebildepakets hin in der beabsichtigten Strömungsrichtung höher wird als quer zu der Richtung, während der Strömungswiderstand im mittleren Abschnitt des Flächengebildepakets in der beabsichtigten Strömungsrichtung klein ist.
EP95918810A 1994-05-06 1995-05-02 Wärmetauscher Expired - Lifetime EP0759139B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9401567A SE515923C2 (sv) 1994-05-06 1994-05-06 Värmeväxlare
SE9401567 1994-05-06
PCT/SE1995/000479 WO1995030867A1 (en) 1994-05-06 1995-05-02 Heat exchanger and method for its manufacture

Publications (2)

Publication Number Publication Date
EP0759139A1 EP0759139A1 (de) 1997-02-26
EP0759139B1 true EP0759139B1 (de) 2000-03-08

Family

ID=20393915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95918810A Expired - Lifetime EP0759139B1 (de) 1994-05-06 1995-05-02 Wärmetauscher

Country Status (7)

Country Link
EP (1) EP0759139B1 (de)
JP (1) JP3669590B2 (de)
AT (1) ATE190394T1 (de)
AU (1) AU2458695A (de)
DE (1) DE69515474T2 (de)
SE (1) SE515923C2 (de)
WO (1) WO1995030867A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101427093B (zh) * 2006-04-24 2010-06-02 丰田自动车株式会社 热交换器、热交换重整器以及制造热交换器和热交换重整器的方法
DE102011011326A1 (de) 2011-02-16 2012-08-16 Mtu Aero Engines Gmbh Plattenwärmetauscher

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308883A (en) * 1996-01-03 1997-07-09 Simon Derricutt Heat exchanger with concertina plate
US5732460A (en) * 1996-05-17 1998-03-31 Livernois Research & Development Company Corrugation machine for making a core for a heat exchanger
US6186223B1 (en) * 1998-08-27 2001-02-13 Zeks Air Drier Corporation Corrugated folded plate heat exchanger
IT1314398B1 (it) 2000-04-19 2002-12-13 Cosmotec S P A Scambiatore di calore ad elevata efficienza termica, lamieraparzialmente corrugata per scambiatori di calore, impianto e
DE10146258A1 (de) * 2001-09-20 2003-04-17 Behr Gmbh & Co Wärmetauscher und gehäuseartige Halterung für den Wärmetauscher
DE10302708A1 (de) * 2003-01-23 2004-07-29 Behr Gmbh & Co. Kg Vorrichtung zum Austausch von Wärme
DK200600137A (da) * 2005-12-21 2007-06-22 Petersen Peder Vejsig Varmeveksler i tynde profilerede plader
DE102007004993A1 (de) * 2007-02-01 2008-08-07 Modine Manufacturing Co., Racine Herstellungsverfahren für Flachrohre und Walzenstraße
NO334102B1 (no) 2010-09-07 2013-12-09 Pleat As Varmeveksler
JP6093240B2 (ja) * 2013-05-15 2017-03-08 株式会社タクボ精機製作所 熱交換装置
NO340556B1 (no) 2014-05-30 2017-05-08 Pleat As Anordning for varmeveksling
NO342528B1 (no) 2016-01-29 2018-06-11 Sperre Coolers As System for varmeveksling
KR20210087941A (ko) * 2018-11-05 2021-07-13 젠더 그룹 인터내셔널 아게 열 교환기 블록에 하우징을 제공하는 방법 및 이러한 하우징을 갖는 열 교환기 블록
CN112845938B (zh) * 2020-12-31 2023-06-23 南宁市安和机械设备有限公司 一种制作错位打点油冷器管的设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1201715A (en) * 1967-04-19 1970-08-12 Mtu Muenchen Gmbh Improved heat exchanger
SE352724B (de) * 1969-11-10 1973-01-08 Thermovatic Jenssen S
US3640340A (en) * 1970-11-20 1972-02-08 Baxter Laboratories Inc Heat exchange device with convoluted heat transfer wall
DE2408462A1 (de) * 1974-02-22 1975-08-28 Kernforschungsanlage Juelich Waermetauscher fuer getrennt gefuehrte medien
US4043388A (en) * 1975-04-14 1977-08-23 Deschamps Laboratories, Inc. Thermal transfer care
DE3416840A1 (de) * 1984-05-07 1985-11-07 Etablissement Agura, Vaduz Verfahren zur herstellung eines heizkessels mit einer doppelwandigen, maeanderfoermigen lamelle als ein waermeuebertragendes medium fuehrendem teil
GB8611667D0 (en) * 1986-05-13 1986-06-18 Mckirdy I D Heat exchanger
US5224538A (en) * 1991-11-01 1993-07-06 Jacoby John H Dimpled heat transfer surface and method of making same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101427093B (zh) * 2006-04-24 2010-06-02 丰田自动车株式会社 热交换器、热交换重整器以及制造热交换器和热交换重整器的方法
DE102011011326A1 (de) 2011-02-16 2012-08-16 Mtu Aero Engines Gmbh Plattenwärmetauscher

Also Published As

Publication number Publication date
SE9401567D0 (sv) 1994-05-06
JPH09512895A (ja) 1997-12-22
WO1995030867A1 (en) 1995-11-16
EP0759139A1 (de) 1997-02-26
SE515923C2 (sv) 2001-10-29
ATE190394T1 (de) 2000-03-15
AU2458695A (en) 1995-11-29
JP3669590B2 (ja) 2005-07-06
DE69515474T2 (de) 2000-11-02
DE69515474D1 (de) 2000-04-13
SE9401567L (sv) 1995-11-07

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