EP0828983A1 - Echangeur de chaleur a plaques presentant des zones de repartition - Google Patents

Echangeur de chaleur a plaques presentant des zones de repartition

Info

Publication number
EP0828983A1
EP0828983A1 EP97914447A EP97914447A EP0828983A1 EP 0828983 A1 EP0828983 A1 EP 0828983A1 EP 97914447 A EP97914447 A EP 97914447A EP 97914447 A EP97914447 A EP 97914447A EP 0828983 A1 EP0828983 A1 EP 0828983A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
distribution zone
plates
fins
projections
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.)
Withdrawn
Application number
EP97914447A
Other languages
German (de)
English (en)
Inventor
Keith Thomas Symonds
Steven Paul Symonds
Brian Keith Watton
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.)
Chart Heat Exchangers Ltd
Original Assignee
Denso Marston Ltd
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
Priority claimed from GB9606801A external-priority patent/GB2311844A/en
Priority claimed from GBGB9613105.7A external-priority patent/GB9613105D0/en
Application filed by Denso Marston Ltd filed Critical Denso Marston Ltd
Publication of EP0828983A1 publication Critical patent/EP0828983A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F28F3/048—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 ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28D9/0031—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 for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—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 for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media

Definitions

  • This invention relates to heat exchangers and methods for their manufacture.
  • it relates to "compact" heat exchangers which are characterised by high "area density”. This means that they have a high ratio of heat transfer surface to heat exchange volume.
  • the plates and other components of a heat exchanger should be as uniform as possible, and straightforward to produce from standard machinery or standard components. Design features running in straight lines i.e. rectilinear, or on fixed radii are particularly desirable. This simplifies assembly and it is much cheaper to produce only a limited number of components than a huge variety. The designer is therefore constrained in his efforts to design a "distribution zone" which has a means of progressively adjusting the flow restrictions and hence the pressure drop as the fluid passes through a distribution zone. Flow restrictions associated with any particular movement of fluid through the distribution zone should ideally be decreased as the distance from the entry to the distribution zone increases.
  • a heat exchanger comprising a plurality of plates bonded face-to-face one to the other, said plates having on their faces a plurality of upstanding fins defining therebetween passages for fluid flow, said heat exchanger having a main heat exchange zone and a distribution zone between the entry to the heat exchanger and the main heat exchanger zone, said plates similarly having a main heat exchanger zone and a distribution zone, there being upstanding fins in both said zones of said plates, said upstanding fins in the distribution zone of the plates comprising a plurality of discrete projections along the direction of fluid flow, characterised in that said discrete projections include amongst them a plurality of projections which are aligned differently from adjacent projections along the direction of fluid flow.
  • the projections are typically created by photochemically or electrochemically etching (or by any other appropriate method) a network of discreet upstanding fins on one or both sides of said plates.
  • the fluid passageways through the distribution zone are preferably interconnected, the interconnection being provided by spaces between said fins.
  • side bars are typically created from unetched metal.
  • the fins may be of variable length in the direction of fluid flow and offset at different angles to the overall flow direction of fluid through the heat exchange zone.
  • the fins may comprise both rectilinear and curved projections.
  • the fins may be straight-sided, curved or aerofoil-shaped or a combination of each. Where there are fins on both sides of the plates, the fins on one plate may register with identically configured fins on an adjacent plate and are joined together by e.g. brazing or diffusion bonding, or by the use of adhesives.
  • the fin configuration etched onto one side of a particular plate may be identical to or different from that etched on an adjacent plate, or where a plate is etched on both sides, onto the other side of the same plate.
  • Plane metal sheets may be used as separator plates with two or more finned plates to form one discrete flow layer for a single fluid.
  • the designer of the distribution zone can vary the length of fins, the distance between them, (both along the flow direction and laterally of it), and the density of fins in a particular area of the distribution zone in the direction of fluid flow.
  • the discrete projections, or fins, at the entry to the distribution zone may be positioned and angled such as to create a higher flow resistance to fluid which traverses a shorter path through the heat exchanger.
  • Figure 1 is a schematic plan view showing a cross-section of a heat exchanger in accordance with the invention
  • Figure 2 is a cut-away view of part of the heat exchanger of Figure 1 ;
  • Figure 2 A is a cut-away view of part of an alternative heat exchanger;
  • Figure 3 is a cross-section illustrating a principle of construction of the heat exchanger of Figure 2
  • Figure 3A is a cross-section (similar to that of Figure 3) illustrating a principle of construction of the heat exchanger of Figure 2A
  • Figure 4 is a schematic view, similar to Figure 1 , illustrating certain of the design characteristics of the heat exchangers according to the invention.
  • a heat exchanger 10 (see Figure 1 ) has a main heat exchange zone 1 1 connected with a distribution zone 12 at its entry end.
  • Heat exchanger 10 comprises a series of thin plates aligned parallel to one another, some of which are planar 14 and some of which 15 have a plurality of discrete projections or fins 16 and 17 extending towards plate 15. It is a plate of the type 15 (with projections or fins 16) which is seen in Figures 1, 2, 2A and 4.
  • Plate 15 has fins 16 which extend parallel to one another along the line of flow (shown by arrow 18) through the main heat exchange zone.
  • the distributor fins 17 may have some which are parallel to others but their alignment and location is determined by factors which will be described later in this document.
  • Both types of fin 16 and 17 are photochemically or electrochemically etched from a sheet of parent metal e.g. stainless steel as are upstanding side bars or spacers 19 which are of the same height as the fins 16, 17. Fins 16, 17 and side bars 19 or spacers are etched on either both sides ( Figure 2) or one side only ( Figure 2 A) of plates 15. When both sides of a plate are etched, the fins are coincident with one another, such that they will register identically with fins 16, 17 and side bars 19 on adjacent plates 15 as seen in Figure 3. When etched on one side only, plate 15 may be stacked or shown in Figure 3 A.
  • the side bars or spacers 19 extend around the periphery of plate 15 except for portions where an entry 20 and an exit 21 to the heat exchanger 10 are provided.
  • the entry 20 is a side entry into the distribution zone 12 of heat exchanger 10 such that fluid passing through the heat exchanger 10 can enter at right angles to the direction of fluid flow through the main heat exchange zone 1 1.
  • the exit 21 is similarly treated to permit fluid to exit at right angles to the flow through the main heat exchange zone 1 1.
  • Fins 16, 17 are shown only in the portion of heat exchanger 10 adjacent entry 20, but in practice they extend throughout the heat exchanger.
  • the junction between the distribution zone 12 and the main heat exchange zone 1 1 extends across the heat exchanger from the side 22 of entry 20 away from the end of the heat exchanger.
  • the junction between the main heat exchange zone 1 1 and the exit distribution zone is shown by dashed line 23 in Figure 1. Side entry and exit configurations enable heat exchangers to be provided with multi-stream capability.
  • Plates 14 and plates 15 which are etched on both sides are arranged in a stack, part of which is seen in Figure 3.
  • a pair of etched plates 15 are arranged with their fins 16 and side bars 19 registered (Figure 3 illustrates a fin configuration in the main heat exchange zone 1 1 ).
  • Planar plates (side plates 14) are added to provide a sandwich, or flow layer 30 which has enclosed passageways 30, all of which will carry the same fluid.
  • An adjacent flow layer (not shown) can be built up parallel to that shown in Figure 3 and registering with its side bars 19. A different fluid will flow through the adjacent flow layer, and it may be that the fin pattern and distribution in adjacent flow layers may be different according to the fluid characteristics.
  • the number of plates 15 making up a single flow layer may also be more than two.
  • the entry and exit to the heat exchanger for different fluids are arranged to be from different sides of the heat exchanger, and this may be achieved by etching the entry and exit through the side bars 19 in different positions.
  • An alternative build up of plates which are etched only on one side is shown in Figure 3A.
  • the separation of the fins 17 in the distribution zones 12 (both along the overall flow direction and laterally of it) is generally not uniform, even at entry 20.
  • the flow passageways in the distribution zones 12 which are created by the fins 17 are able to interact with each other by way of the spacings along the flow direction.
  • Fins 16, 17 may be positioned anywhere on the surface of plate 15 where it is desired. As illustrated in this example, in the heat exchange zone 1 1 the fins 16 are arranged in rows in a regular pattern with alternate rows offset relative to each other i.e. the leading edge of each fin 16 in one row trails (or leads) the leading edge of each fin 16 in an adjacent row. The pitch of fins 16 may be such that the gap between fins along the flow direction is greater than the fin length. Each offset fin may then be more than a fin length behind the leading edge of a fin in an adjacent row. In the distribution zone 12, the fins 17 are arranged in lines which will curve towards the heat exchange zone 1 1.
  • Alternate lines of fins 17 are then offset from one another in a similar way to the rows of fins 16 in the heat exchange zone 1 1.
  • the offset fins, or some of them, may be angled differently from adjacent fins 17.
  • the length of the fins 17 may be different at different positions in the distribution zone 12 e.g. the length may be greater as the flow approaches the heat exchange zone 1 1.
  • the pitch of fins 17 may also change along their line through the distribution zone 12.
  • supplementary fins 53, 54, 55 may be used to give a local higher fin density and to make small adjustments to the flow patterns to enhance even distribution of fluid across the whole of the heat exchange zone 1 1. Fins may be curved 40, aerofoil 41 or straight and they may be set at a variety of angles to the fluid flow.
  • a typical distribution side entry could be designed such that the pitch and angle of fins 17 which are encountered by the fluid entering adjacent the point of entry 20 furthest from side 22, are such as to create a lower resistance to flow than the fins 17 (which are differently pitched and angled) encountered by fluid entering the distribution zone 12 closer to side 22 of entry 20. In this way a higher flow resistance may be created to fluid which takes a shorter path (e.g. arrow 51 - see Figure 4) than that which takes a longer path (e.g. arrow 52 - see Figure 4) through the heat exchanger 10.

Abstract

L'invention porte sur un échangeur de chaleur comportant plusieurs plaques (14, 15) reliées face à face l'une à l'autre et qui comportent chacune (14, 15) des ailettes droites (16, 17, 40, 41, 53, 54, 55) délimitant des passages pour l'écoulement du fluide. Chacune des plaques (14, 15) comporte une zone de répartition (12) et une zone principale d'échange de chaleur (11). Les ailettes de la zone de répartition (12) comprennent certaines ailettes (17, 40, 41, 53, 54, 55) présentant une orientation différente de celle des ailettes voisines dans le sens (51, 52) d'écoulement du fluide.
EP97914447A 1996-03-30 1997-03-26 Echangeur de chaleur a plaques presentant des zones de repartition Withdrawn EP0828983A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9606801A GB2311844A (en) 1996-03-30 1996-03-30 Plate heat exchanger
GB9606801 1996-03-30
GB9613105 1996-06-21
GBGB9613105.7A GB9613105D0 (en) 1996-06-21 1996-06-21 Heat exchangers and methods for their manufacture
PCT/GB1997/000848 WO1997037187A1 (fr) 1996-03-30 1997-03-26 Echangeur de chaleur a plaques presentant des zones de repartition

Publications (1)

Publication Number Publication Date
EP0828983A1 true EP0828983A1 (fr) 1998-03-18

Family

ID=26309034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97914447A Withdrawn EP0828983A1 (fr) 1996-03-30 1997-03-26 Echangeur de chaleur a plaques presentant des zones de repartition

Country Status (5)

Country Link
EP (1) EP0828983A1 (fr)
JP (1) JP2000506966A (fr)
AU (1) AU708247B2 (fr)
CA (1) CA2222716A1 (fr)
WO (1) WO1997037187A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6374910B2 (en) * 1997-01-27 2002-04-23 Honda Giken Kogyo Kabushiki Kaisha Heat exchanger
WO2001054806A1 (fr) * 2000-01-25 2001-08-02 Meggitt (Uk) Ltd Reacteur chimique comportant un echangeur de chaleur
FR2831654B1 (fr) * 2001-10-31 2004-02-13 Valeo Climatisation Tubes d'echangeur thermique a plaques optimisees
NL1022794C2 (nl) * 2002-10-31 2004-09-06 Oxycell Holding Bv Werkwijze voor het vervaardigen van een warmtewisselaar, alsmede met de werkwijze verkregen warmtewisselaar.
US7073573B2 (en) 2004-06-09 2006-07-11 Honeywell International, Inc. Decreased hot side fin density heat exchanger
JP2006125767A (ja) * 2004-10-29 2006-05-18 Tokyo Institute Of Technology 熱交換器
DE102005029321A1 (de) 2005-06-24 2006-12-28 Behr Gmbh & Co. Kg Wärmeübertrager
JP4818044B2 (ja) * 2006-09-28 2011-11-16 三洋電機株式会社 熱交換器の製造方法
JP2008128574A (ja) * 2006-11-21 2008-06-05 Toshiba Corp 熱交換器
US9255745B2 (en) * 2009-01-05 2016-02-09 Hamilton Sundstrand Corporation Heat exchanger
EP2431699A1 (fr) * 2010-09-20 2012-03-21 Thermal Corp. Appareil de refroidissement
WO2014137867A1 (fr) * 2013-03-02 2014-09-12 James Carl Loebig Échangeur de chaleur à microcanaux et procédés de fabrication
US10178805B2 (en) * 2014-05-23 2019-01-08 Tesla, Inc. Heatsink with internal cavity for liquid cooling
US10088239B2 (en) 2015-05-28 2018-10-02 Hamilton Sundstrand Corporation Heat exchanger with improved flow at mitered corners
JP7210151B2 (ja) * 2018-03-30 2023-01-23 住友精密工業株式会社 拡散接合型熱交換器

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Publication number Priority date Publication date Assignee Title
DE1259362B (de) * 1959-06-29 1968-01-25 Joachim Beushausen Waermetauscher mit plattenartigen Waermetauschwaenden aus leicht biegsamen Kunststoff-Folien
US3291206A (en) * 1965-09-13 1966-12-13 Nicholson Terence Peter Heat exchanger plate
DE1501568B2 (de) * 1966-10-12 1971-05-13 Linde Ag, 6200 Wiesbaden Plattenwaermetauscher
US4749032A (en) * 1979-10-01 1988-06-07 Rockwell International Corporation Internally manifolded unibody plate for a plate/fin-type heat exchanger
AU568940B2 (en) 1984-07-25 1988-01-14 University Of Sydney, The Plate type heat exchanger
GB2251679B (en) 1989-05-04 1993-12-15 Secretary Trade Ind Brit Heat exchangers
DE4142177C2 (de) * 1991-12-20 1994-04-28 Balcke Duerr Ag Plattenwärmetauscher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9737187A1 *

Also Published As

Publication number Publication date
JP2000506966A (ja) 2000-06-06
CA2222716A1 (fr) 1997-10-09
WO1997037187A1 (fr) 1997-10-09
AU708247B2 (en) 1999-07-29
AU2169197A (en) 1997-10-22

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