WO2003085344A1 - Ensemble echangeur de chaleur - Google Patents

Ensemble echangeur de chaleur Download PDF

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Publication number
WO2003085344A1
WO2003085344A1 PCT/EP2002/003971 EP0203971W WO03085344A1 WO 2003085344 A1 WO2003085344 A1 WO 2003085344A1 EP 0203971 W EP0203971 W EP 0203971W WO 03085344 A1 WO03085344 A1 WO 03085344A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
inner tube
bore
tube
fluid
Prior art date
Application number
PCT/EP2002/003971
Other languages
English (en)
Inventor
Anders Tage Jensen
Leif Petersen
Original Assignee
Norsk Hydro Asa
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 Norsk Hydro Asa filed Critical Norsk Hydro Asa
Priority to AU2002304735A priority Critical patent/AU2002304735A1/en
Priority to PCT/EP2002/003971 priority patent/WO2003085344A1/fr
Publication of WO2003085344A1 publication Critical patent/WO2003085344A1/fr

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
    • 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
    • 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
    • F28D7/10—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 one within the other, e.g. concentrically
    • F28D7/106—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 one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • 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
    • F28F1/14—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 longitudinally
    • F28F1/16—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 longitudinally the means being integral with the element, e.g. formed by extrusion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded

Definitions

  • the invention relates to a heat exchanger assembly comprising an inner tube forming a first channel for a first fluid, an outer tube completely surrounding the inner tube and extending in a parallel manner with respect to the inner tube, thereby defining a second channel for a second fluid, fins extending between the outside wall of the inner tube and the inside wall of the outer tube and further extending in the longitudinal direction of these tubes.
  • Coaxial heat exchangers are normally made of an inner tube and an outer tube mutually connected by connection walls.
  • a first fluid having a first temperature flows through the channel formed by the inner tube and a second fluid having another temperature is flowing through the channel formed between the inner and the outer tube.
  • the inner tube wall and to some extent the intermediate ribs will transfer heat from the first fluid to the second fluid or vice versa. In order to get the best heat transfer between the fluids it is important to ensure a good contact between the tubes and the ribs formed by the connection walls..
  • the outer and inner tube and the connection walls are extruded as a one piece profile whereby the connecting walls are integrated with the inner and the outer tube.
  • the end portion of the outer tube has to be removed before the heat exchanger can be connected to a manifold or connecting member. This is an additional step in the production process and a waste of material. This is especially impor- tant as the profile is difficult to extrude and the extrusion speed relatively slow for such a coaxial heat exchanger.
  • the fins are integrated with the inner tube only.
  • the inner tube being able to be inserted into the outer tube while having a somewhat greater length.
  • the connection to a header or connecting member is now possible without the need to remove part of the outer tube.
  • two differ- ent alloys for the two tubes such as a high corrosion resistant alloy for the simple outer tube, which normally has a somewhat lower extrudability and a lean and therefor cheap alloy for the inner tube enabling a higher extrusion speed.
  • US-A 6 098 704 also describes a coaxial heat exchanger consisting of two tubes, in which the inner tube is a standard round tube and the outer tube is an extruded tube with internal ribs.
  • the heat exchanger is made by pushing or threading the inner tube into the outer tube.
  • the same type of heat exchanger can be made except for the fact that the fins are integrated with the outer tube.
  • the contact between the inner tube and the ribs is not always complete. As most of the fluid in the second channel is in contact with the fins, and the contact with the fins and the inner tube might be defective the ability to transfer heat from the fluid in the inner tube through the inner tube and ribs to the outer fluid or vice versa is lowered.
  • fig. 1 shows a cross-section of a first embodiment of a heat exchanger according to the invention
  • fig. 2 shows a cross-section of a second embodiment of a heat exchanger according to the invention
  • fig. 3 shows in a perspective view of a connector leading in or out a first and a second fluid into or out of the channels of the heat exchanger according to the invention
  • fig. 4 shows a top view of the connector of fig.
  • fig. 5 shows a cross sectional view of the connector of fig.
  • fig. 6 shows the same cross sectional view of the connector of fig.
  • fig. 7 shows a perspective view of a second embodiment of a connector.
  • Fig. 1 shows the cross section of a heat exchanger according to the present invention.
  • the heat exchanger comprises an inner tube 3, an outer tube 1 and fins 2 extending between the inner tube 3 and the outer tube 1.
  • the intermediate fins 2 are extruded in one part with the inner tube 3.
  • Through an inner channel 24 formed by the inner tube 3 a first fluid can flow.
  • the inner tube 3, the outer tube 1 and the ribs form a number of channels 25 through which a second fluid can flow, whereby, if the temperature of the two fluids is different, heat exchange can take place between the first fluid and the second fluid.
  • the flow direction of the two fluids may be a counter flow or they may flow in the same direction, dependent upon the application of the heat exchanger.
  • Both tubes 1 and 3 can be made by means of extrusion as is common in the art.
  • the heat exchanger can be assembled by inserting the inner tube 3 into the outer tube 1.
  • the external diameter of the fins 2 is substantially equal to the inner diameter of the outer tube 1.
  • the dimensions are selected in such a way that a small defor- mation of the end of the fins 2 is needed to insert the inner tube into the outer tube, so that the inner tube 3 is somewhat fixed with respect to the outer tube 1 and the heat transfer between the fins 2 and the outer tube 1 is improved.
  • the outer tube 1 is made separately it is possible to select a different alloy for the outer tube 1 and the inner tube 3.
  • the inner tube 1 and intermediate fins 2 can be made of a lean or softer alloy than normally used in heat exchangers, leading to a considerable gain in extrusion speed. This is especially important as this tube has a complicate cross- section shape and therefor needs a complicated die.
  • the outer tube 1 can be made of a stronger and more corrosion resistant material. In this way a corrosion resistant outer surface is ensured while a cheap and flexible inner part is obtained.
  • the first fluid in channel 24 is completely surrounded by the inner tube 3, whereas the second fluid in the channels 25 is for the greater part in contact with portions belonging to the inner tube, and for a smaller part with portions of the outer tube 1.
  • these deficiencies will influence in a negative way the total heat transfer between the first and the second fluid, but as most of the surrounding surface of the second fluid is constituted by the inner tube, this has less influence than according to the prior art.
  • Fig. 2 shows a second embodiment of a heat exchanger according to the invention.
  • This heat exchanger is almost identical to the heat exchanger shown in Figure 1, with the exception of the shape of the inner channel 24.
  • protrusions 6 are provided to the inner wall of the inner tube 3.
  • these protrusions are extruded integrally with the inner tube and intermediate fins.
  • the protrusions 6 have the shape of continuous ribs extending parallel to the axis of the tube 3, but can also be shaped in different forms, such as screw-line shaped ribs, interrupted protrusions as seen along the axis of the tube etc.
  • the connector consists of a block member, which may be an aluminium block obtained by extrusion and cut to an appropriate length.
  • the extruded profile has a semicircular cross-section with one flat surface 101, and the block has two end faces 102 and 103.
  • a bore 104 has been made with a diameter which is almost equal to the external diameter of the heat exchanger 7 and extending in the axial direction of the extruded profile and parallel to the surface 101. This bore extends to somewhat halfway the length of the block 8 in a wall 105.
  • a second bore 106 has been made extending in the same direction as the bore 104.
  • This bore has a diameter which is substantially equal to the inner diameter of diameter of the inner tube 3.
  • two parallel bores are made, a first bore 9 and a second bore 10 ending respectively in the bore 106 and 104 respectively.
  • These bores 9 and 10 may be provided with standard implements for connecting a bore to another tube or hose for fluid transport.
  • the bores as described are cylindrical but the bores may also have any other cross section, such as rectangular, within the scope of the invention.
  • the heat exchanger 7 is assembled in such a way that the inner tube is extending from the outer tube over a distance which is about equal to the diameter of the bore 10. After insertion of one end of the heat exchanger 7 in the bore 104 a situation as shown in figure 6 will be obtained, in which the inner tube 3 extend up till the wall 105, and the channels 25 are in fluid communication with the bore 10. The inner channel 24 is in fluid communication with the bore 9. After brazing the heat exchanger 7 to the connector 8 whereby fluid tight connections can be made the heat exchanger 7 is provided with a connector 8 allowing the supply and the removal of the fluids through standard connectors, as commonly used in the art.
  • the connecting lines leading the fluids into and out from the connector 8 and heat exchanger 7 can be placed parallel to each other, due to the bores being arranged in the same direction. This leads to a space saving way of organising the connecting lines leading into and out from the heat exchanger.
  • annular chamber 11 in the connector 8 is surrounding the end part of the inner tube 3.
  • the annular chamber 11 enables the second fluid to flow around the inner tube 3 and to be led into the openings to the channels 25 between the inner and the outer tubes in a equally distributed fluid flow. In this way, a processing step is eliminated, thereby saving production time and costs.
  • the chamber 11 is leading the second fluid into or out of the outer channels 25 between the inner tube 3 and the outer tube 1 of the heat exchanger.
  • the arrangement of the chamber 11 allows the intermediate fins 2 (shown on fig. 4) to be integrated with the inner tube, saving production costs.
  • Fig. 7 shows a second embodiment of a connector 110 for the coaxial heat exchanger according to the invention.
  • the two embodiments of the connector enables a flexible system suitable for the narrow spaces in a vehicle body.

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

L'invention concerne un ensemble échangeur de chaleur qui comprend un tube intérieur (3) formant un premier canal (24) destiné à un premier fluide et un tube extérieur (1) entourant complètement le tube intérieur (3) et s'étendant parallèlement à ce tube intérieur, définissant ainsi un second canal (25) destiné à un second fluide. Des ailettes (2) s'étendent entre la paroi extérieure du tube intérieur (3) et la paroi intérieure du tube extérieur (1), et s'étendent également dans la direction longitudinale de ces tubes. Ces ailettes (2) font partie intégrante uniquement du tube intérieur (3). Cet ensemble échangeur de chaleur comprend également un élément de connexion (8) possédant un bloc avec un alésage permettant l'introduction des extrémités des deux tubes, ainsi qu'un orifice cylindrique (9) en communication fluidique avec le premier canal (24) et un orifice cylindrique (10) en communication fluidique avec le second canal (25).
PCT/EP2002/003971 2002-04-08 2002-04-08 Ensemble echangeur de chaleur WO2003085344A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002304735A AU2002304735A1 (en) 2002-04-08 2002-04-08 Heat exchanger assembly
PCT/EP2002/003971 WO2003085344A1 (fr) 2002-04-08 2002-04-08 Ensemble echangeur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2002/003971 WO2003085344A1 (fr) 2002-04-08 2002-04-08 Ensemble echangeur de chaleur

Publications (1)

Publication Number Publication Date
WO2003085344A1 true WO2003085344A1 (fr) 2003-10-16

Family

ID=28685823

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/003971 WO2003085344A1 (fr) 2002-04-08 2002-04-08 Ensemble echangeur de chaleur

Country Status (2)

Country Link
AU (1) AU2002304735A1 (fr)
WO (1) WO2003085344A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004003325A1 (de) * 2004-01-22 2005-08-18 Valeo Klimasysteme Gmbh Koaxial-Wärmetauscher, Verfahren zur Herstellung eines Koaxial-Wärmetauschers, Verfahren zum Anschließen eines Koaxial-Wärmetauschers und ringförmige Dichtung für einen Koaxial-Wärmetauscher
WO2006059215A1 (fr) * 2004-12-02 2006-06-08 Groppalli S.R.L. Dispositif de recuperation de la chaleur de gaz de combustion d'une chaudiere domestique
WO2006110087A1 (fr) 2005-04-15 2006-10-19 Jerzy Hawranek Echangeur thermique axial
CN102192670A (zh) * 2010-03-05 2011-09-21 和承R&A株式会社 双套管及具备该双套管的热交换机
WO2013070450A1 (fr) * 2011-11-08 2013-05-16 Carrier Corporation Échangeur de chaleur et son procédé de réalisation
CN103437106A (zh) * 2013-09-10 2013-12-11 吴江涵辉纺织有限公司 一种拉幅定型机的换热管
CN104359339A (zh) * 2014-11-18 2015-02-18 福建省万旗非金属材料有限公司 纳米碳酸钙二氧化碳余热的回收设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR874111A (fr) * 1940-07-03 1942-07-29 Escher Wyss & Cie Const Mec Appareil échangeur de chaleur à contre-courant et doubles tubes
US4778002A (en) * 1985-09-14 1988-10-18 Norsk Hydro A.S Fluid cooler
JPH01230990A (ja) * 1988-03-09 1989-09-14 Showa Alum Corp ２重管式熱交換器
EP0550845A1 (fr) * 1991-12-12 1993-07-14 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Vaporisateur pour gaz naturel liquéfié
US6098704A (en) 1997-06-06 2000-08-08 Denso Corporation Heat exchanger having a double pipe construction and method for manufacturing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR874111A (fr) * 1940-07-03 1942-07-29 Escher Wyss & Cie Const Mec Appareil échangeur de chaleur à contre-courant et doubles tubes
US4778002A (en) * 1985-09-14 1988-10-18 Norsk Hydro A.S Fluid cooler
JPH01230990A (ja) * 1988-03-09 1989-09-14 Showa Alum Corp ２重管式熱交換器
EP0550845A1 (fr) * 1991-12-12 1993-07-14 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Vaporisateur pour gaz naturel liquéfié
US6098704A (en) 1997-06-06 2000-08-08 Denso Corporation Heat exchanger having a double pipe construction and method for manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 559 (M - 905) 12 December 1989 (1989-12-12) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004003325A1 (de) * 2004-01-22 2005-08-18 Valeo Klimasysteme Gmbh Koaxial-Wärmetauscher, Verfahren zur Herstellung eines Koaxial-Wärmetauschers, Verfahren zum Anschließen eines Koaxial-Wärmetauschers und ringförmige Dichtung für einen Koaxial-Wärmetauscher
WO2006059215A1 (fr) * 2004-12-02 2006-06-08 Groppalli S.R.L. Dispositif de recuperation de la chaleur de gaz de combustion d'une chaudiere domestique
WO2006110087A1 (fr) 2005-04-15 2006-10-19 Jerzy Hawranek Echangeur thermique axial
US7438122B2 (en) 2005-04-15 2008-10-21 Jerzy Hawranek Axial heat exchanger
CN102192670A (zh) * 2010-03-05 2011-09-21 和承R&A株式会社 双套管及具备该双套管的热交换机
WO2013070450A1 (fr) * 2011-11-08 2013-05-16 Carrier Corporation Échangeur de chaleur et son procédé de réalisation
US9943088B2 (en) 2011-11-08 2018-04-17 Carrier Corporation Heat exchanger and method of making thereof
US10785992B2 (en) 2011-11-08 2020-09-29 Taylor Commercial Foodservice, Llc Heat exchanger and method of making thereof
US11278040B2 (en) 2011-11-08 2022-03-22 Taylor Commercial Foodservice, Llc Heat exchanger and method of making thereof
CN103437106A (zh) * 2013-09-10 2013-12-11 吴江涵辉纺织有限公司 一种拉幅定型机的换热管
CN104359339A (zh) * 2014-11-18 2015-02-18 福建省万旗非金属材料有限公司 纳米碳酸钙二氧化碳余热的回收设备

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