EP0851197B1 - Echangeur de chaleur, en particulier pour gaz d'échappement - Google Patents

Echangeur de chaleur, en particulier pour gaz d'échappement Download PDF

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Publication number
EP0851197B1
EP0851197B1 EP97120667A EP97120667A EP0851197B1 EP 0851197 B1 EP0851197 B1 EP 0851197B1 EP 97120667 A EP97120667 A EP 97120667A EP 97120667 A EP97120667 A EP 97120667A EP 0851197 B1 EP0851197 B1 EP 0851197B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
projections
shells
tube nest
rectangular ducts
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
EP97120667A
Other languages
German (de)
English (en)
Other versions
EP0851197A3 (fr
EP0851197A2 (fr
Inventor
Herbert Dr.-Ing. Damsohn
Conrad Dr.-Ing. Pfender
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
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Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0851197A2 publication Critical patent/EP0851197A2/fr
Publication of EP0851197A3 publication Critical patent/EP0851197A3/fr
Application granted granted Critical
Publication of EP0851197B1 publication Critical patent/EP0851197B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
    • 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
    • F28F1/045—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular with assemblies of stacked elements
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, with one used for gas guidance Tube bundle made of rectangular tubes and with one the tube bundle surrounding, for guiding a liquid coolant Outer jacket that has a coolant inlet and a Coolant outlet is provided.
  • a heat exchanger of the type mentioned is the subject the older, unpublished EP-A-0 772 018.
  • the invention has for its object a heat exchanger of the type mentioned in such a way that the rectangular tubes and possibly also the outer jacket with small Wall thicknesses can be realized while still a sufficient strength is given, even if the gaseous Medium and / or the liquid coolant under a certain Pressure are supplied.
  • the rectangular tubes are mutually supported during assembly to form a bundle.
  • the outer rectangular tubes of the tube bundle are supported on the outer jacket.
  • This design ensures that rectangular tubes with a small wall thickness can be used, and yet a high compressive strength is achieved.
  • the protrusions also affect the flow of the liquid coolant so that heat transfer is improved. Since the liquid coolant is constantly exchanged, O 2 diffusion is prevented, which could cause crevice corrosion.
  • Rectangular tubes composed of two U-shaped half-shells are whose bottoms are provided with embossed projections. This design of the rectangular tubes is economical Manufacturing possible.
  • the projections have an oval base, the largest of which Dimension runs in the direction of flow. It will be advantageous further provided that the projections transverse to the direction of flow an essentially semi-cylindrical cross section exhibit. Such projections can be easily formed while offering the advantage of a linear support is obtained on the other rectangular tube.
  • the bottoms of the half-shells with a V-shape in the direction of flow diverging tabs are provided.
  • the projections and the tabs in are arranged in succession at regular intervals.
  • the arrangement is expediently made such that the projections one half-shell opposite the tabs of the other Half-shell are arranged. This ensures that favorable flow conditions also within the rectangular tubes exist while attaching the protrusions Attaching the tabs does not interfere.
  • the rectangular tubes are sculpted and gas-tightly connected to each other are. This creates a replacement for a tube sheet, which saves a lot of weight and also still leads to a simplified production.
  • the outer jacket consists of two preferably deep-drawn sheet metal shells is composed in the longitudinal direction of the tube bundle are profiled so that they with one of the height the projections of the rectangular tubes corresponding to the distance follow the outer contour of the tube bundle. This ensures that also in the area of the outer rectangular tubes of Pipe bundle flow channels exist, which are essentially the cross sections of the flow channels between the others Correspond to rectangular tubes.
  • the sheet metal shells in the area of the ends of the tube bundle form a circumferential ring channel, with an annular channel one coolant inlet and one to the other ring channel Coolant outlet are molded, and preferably the Coolant inlet and the coolant outlet approximately to each other diagonally opposite.
  • the ring channels provide one good distribution of the liquid coolant.
  • the exhaust gas heat exchanger shown in the drawing has a tube bundle 10 from a plurality of the same as each other Rectangular tubes that are spaced like this are arranged so that they approximate the contour of an ellipse form.
  • the rectangular tubes of the tube bundle 10, which will be used later 4 and 5 to be explained are in the Embodiment sculpted on its ends, i.e. so expanded that they are flat against each other at the area of the ends issue. As can be seen from Fig. 3, these are tulip-connected ends connected gastight, for example by welding or soldering.
  • the tube bundle 10 is surrounded by an outer jacket 11 which assembled from two preferably deep-drawn sheet metal shells 12, 13 is.
  • the two sheet metal shells 12, 13 on Flanges 14, 15 are tightly connected, for example welded or soldered, are shaped like a step, that they are from the outer rectangular tubes of the tube bundle 10 follow formed outer contour and to this outer Rectangular tubes maintain a distance that is essentially the distance between the rectangular tubes of the tube bundle 10 with each other equivalent.
  • In the area of the ends of the rectangular tubes of the tube bundle 10 they have a circumferential recess, so they are in this area at the ends of the rectangular tubes of the tube bundle 10 and connected to them in a gastight manner are, for example, welded or soldered.
  • a circumferential ring channel 16 To one of these ring channels 16 is a coolant inlet 17 and at the others, is located at the other end of the tube bundle 10 ring channel a coolant outlet 18 is formed. As can be seen from Fig. 2 is the coolant inlet 17 and the coolant outlet 18 essentially diagonally opposite each other, so that there are essentially the same length flow channels for the result in liquid coolant.
  • the tube bundle 10 consists of a plurality of rectangular tubes 19, in the embodiment, a total of sixty-four Rectangular tubes 19 which are mirror symmetrical to the vertical and are arranged to the horizontal longitudinal median plane and the with their flat sides in the horizontal direction and with their narrow sides extend in the vertical direction.
  • This Rectangular tubes 19 are in Figs. 4 and 5 on a larger scale shown.
  • Each rectangular tube 19 is made of two U-shaped Half shells 20, 21 assembled on their thighs are interconnected, preferably welded.
  • the bottoms of the half-shells 20, 21 are each in the middle with regularly arranged, protruding outwards, embossed projections 22 provided.
  • the projections 22 have an essentially oval base in the plane the bottoms of the half-shells 20, 21 and are approximately with one semicylindrical cross section pronounced outwards.
  • the height this protrusion 22 corresponds to the distance between the floors two adjacent rectangular tubes 19. In practice is this height about 1.5 mm, with a total height the rectangular tubes of about 6 mm.
  • the half-shells 20, 21 are on the inside with tabs projecting inwards 23, 24 provided, which are about a quarter of the inner height extend a flat tube.
  • These tabs 23, 24, which is about a quarter of the inside height of a Rectangular tube 19 have a V-shape in the direction of flow apart at an angle of the order of 40 °, the front ends of these tabs 23, 24 leave a space between them.
  • the tabs 23, 24 arranged in pairs are regular Distances distributed over the length of the rectangular tubes 19 arranged.
  • the distance between the pairs of tabs 23, 24 in the longitudinal direction of the rectangular tubes 19 corresponds essentially the distance of the projections 22.
  • FIG. 4 can be seen are the half-shells 20, 22 of a rectangular tube offset in the axial direction so that one outward projection 22 of a shell 20 a Pair of tabs 23, 24 of the other half-shell 21 is opposite.
  • the rectangular tubes 19 are identical to one another and arranged so that they are mutually by means of the projections 22 in half the division of the projections 22 one Rectangular tube 19 are mutually supported.
  • the ends of the Rectangular tubes of the tube bundle are not deformed, i.e. not sculpted. Rather, they are inserted into tube sheets with both ends and with these firmly by soldering or welding and connected gastight.
  • a tube sheet provides a grid represents that follows the outer contour of the outer shell 11 and with cutouts corresponding to the rectangular tubes of the tube bundle 10 is provided. These tube sheets are then gas-tight in welded the outer jacket 11.

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  • 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)

Claims (12)

  1. Échangeur de chaleur, en particulier pour gaz d'échappement, comportant un faisceau tubulaire servant au passage des gaz et constitué de tubes rectangulaires (19), ainsi qu'une enveloppe extérieure (11) entourant le faisceau tubulaire, servant au passage d'un fluide réfrigérant liquide et présentant une entrée (17) pour le fluide réfrigérant et une sortie (18) pour le fluide réfrigérant, les tubes rectangulaires (19) comportant des saillants (22) qui sont orientés vers l'extérieur et déterminent la distance des tubes rectangulaires voisins (19) l'un par rapport à l'autre et par rapport à la paroi intérieure de l'enveloppe extérieure (11).
  2. Échangeur de chaleur selon la revendication 1, caractérisé par le fait que les tubes rectangulaires sont composés de deux demi-coques (20, 21) en forme de U dont les fonds comportent des saillants emboutis (22).
  3. Échangeur de chaleur selon la revendication 1 ou 2, caractérisé par le fait que les saillants (22) sont disposés sur une rangée, au milieu, dans les fonds des demi-coques (20, 21).
  4. Échangeur de chaleur selon l'une des revendications 1 à 3, caractérisé par le fait que les saillants (22) présentent une surface de base ovale dont la plus grande dimension est orientée selon la direction de l'écoulement.
  5. Échangeur de chaleur selon l'une des revendications 1 à 4, caractérisé par le fait que les saillants (22) présentent, perpendiculairement à la direction de l'écoulement, une section sensiblement semi-cylindrique.
  6. Échangeur de chaleur selon l'une des revendications 1 à 5, caractérisé par le fait que les fonds des demi-coques (20, 21) comportent des languettes (23, 24) qui sont disposées par paire et s'écartent l'une de l'autre en forme de V selon la direction de l'écoulement.
  7. Échangeur de chaleur selon la revendication 6, caractérisé par le fait que les saillants (22) et les paires de languettes (23, 24) sont disposées successivement à intervalles réguliers.
  8. Échangeur de chaleur selon la revendication 6 ou 7, caractérisé par le fait que les saillants (22) de l'une des demi-coques (20, 21) sont disposés en face des paires de languettes (23, 24) de l'autre demi-coque (21, 22).
  9. Échangeur de chaleur selon l'une des revendications 1 à 8, caractérisé par le fait que les extrémités des tubes rectangulaires (19) du faisceau tubulaire (10) sont tenues dans les plaques tubulaires avec étanchéité aux gaz.
  10. Échangeur de chaleur selon l'une des revendications 1 à 8, caractérisé par le fait que les extrémités des tubes rectangulaires (19) du faisceau tubulaire (10) sont élargies par emboutissage et reliées l'une à l'autre et avec l'enveloppe extérieure (11) avec étanchéité aux gaz.
  11. Échangeur de chaleur selon l'une des revendications 1 à 10, caractérisé par le fait que l'enveloppe extérieure (11) est composée de deux coques de tôle (12, 13) qui sont de préférence embouties et qui, selon la direction longitudinale du faisceau tubulaire (10), sont profilées de façon à suivre le contour extérieur du faisceau tubulaire (10) à une distance correspondant à la hauteur des saillants (22) des tubes rectangulaires (19).
  12. Échangeur de chaleur selon la revendication 11, caractérisé par le fait que les coques de tôle (12, 13) forment dans chacune des zones des extrémités du faisceau tubulaire (10) un canal annulaire périphérique (16), sur l'un des canaux annulaires (16) étant formée une entrée de fluide réfrigérant (17) et, sur l'autre canal annulaire, étant formée une sortie de fluide réfrigérant (18), et l'entrée de fluide réfrigérant (17) et la sortie de fluide réfrigérant (18) étant de préférence situées diagonalement en face l'une de l'autre.
EP97120667A 1996-12-24 1997-11-26 Echangeur de chaleur, en particulier pour gaz d'échappement Expired - Lifetime EP0851197B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654368A DE19654368B4 (de) 1996-12-24 1996-12-24 Wärmeübertrager, insbesondere Abgaswärmeübertrager
DE19654368 1996-12-24

Publications (3)

Publication Number Publication Date
EP0851197A2 EP0851197A2 (fr) 1998-07-01
EP0851197A3 EP0851197A3 (fr) 1999-05-19
EP0851197B1 true EP0851197B1 (fr) 2002-03-06

Family

ID=7816221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120667A Expired - Lifetime EP0851197B1 (fr) 1996-12-24 1997-11-26 Echangeur de chaleur, en particulier pour gaz d'échappement

Country Status (3)

Country Link
US (1) US6321835B1 (fr)
EP (1) EP0851197B1 (fr)
DE (2) DE19654368B4 (fr)

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EP2242979B1 (fr) * 2008-01-10 2014-09-24 Behr GmbH & Co. KG Tube filé pour échangeur de chaleur
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Also Published As

Publication number Publication date
DE19654368A1 (de) 1998-06-25
DE59706551D1 (de) 2002-04-11
EP0851197A3 (fr) 1999-05-19
DE19654368B4 (de) 2006-01-05
US6321835B1 (en) 2001-11-27
EP0851197A2 (fr) 1998-07-01

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