US3636607A - Method of making a heat exchange tube - Google Patents

Method of making a heat exchange tube Download PDF

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Publication number
US3636607A
US3636607A US889123A US3636607DA US3636607A US 3636607 A US3636607 A US 3636607A US 889123 A US889123 A US 889123A US 3636607D A US3636607D A US 3636607DA US 3636607 A US3636607 A US 3636607A
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US
United States
Prior art keywords
tube
fin
annulus
tube wall
central support
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
US889123A
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English (en)
Inventor
Samuel J Demarco
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Parker Intangibles LLC
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United Aircraft Products Inc
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Publication date
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Publication of US3636607A publication Critical patent/US3636607A/en
Assigned to PARKER-HANNIFIN CORPORATION, A CORP. OF OHIO reassignment PARKER-HANNIFIN CORPORATION, A CORP. OF OHIO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNITED AIRCRAFT PRODUCTS, INC., A CORP. OF OHIO
Anticipated expiration legal-status Critical
Assigned to PARKER INTANGIBLES INC., A CORP. OF DE reassignment PARKER INTANGIBLES INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PARKER-HANNIFIN CORPORATION
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
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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
    • F28F1/105—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being corrugated elements extending around the tubular elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49361—Tube inside tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49803—Magnetically shaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49879—Spaced wall tube or receptacle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube

Definitions

  • Tube assemblies of the kind to which the invention pertains comprise a tube usually arranged in a bundle with other like tubes for a flow of a first fluid over and around the tube exteriors.
  • a second fluid different in temperature from that of the first and separated therefrom, is passed through the tubes.
  • An exchange of heat occurs through the tube walls.
  • a strip of corrugated metal termed a fin, is contoured to an annular shape and inserted in the tube where it is in common contact with the tube wall and the internally flowing second fluid.
  • the fin is an extended surface member, supplementing the tube wall in achieving a conduct of heat. It has an efiiciency determined in large part by the excellence and continuity of its contact with the tube wall.
  • Expanding of the inner tube is, moreover, an indirect means of compressing the fin material to the outer tube wall. Since contact resistance at the outer tube wall is of chief concern in a tube assembly of the class described, expansion of the inner tube is a less effective means of reaching the desired end than would be contraction of the outer tube. This, however, is a problem of less-obvious solution and the use of a die or the like is in any event subject to the same disadvantages as the forcing of a mandrel through the inner tube. The die would of necessity be fixed in diameter and incapable of compelling the tube to deform in accordance with deformities of the fin surface.
  • the present invention has in view a method of fixing a fin annulus within a tube involving metal displacement, but which is not limited by the geometry of a particular die or mandrel.
  • a process of unison deforming is proposed in which an outer or an inner tube is displaced radially against the resistance of the fin annulus.
  • the tube wall is allowed to flow freely into a conforming relation with the fin surface with the result that the entire fin strip is placed uniformly under compression irrespective of undulations and irregularities in fin height.
  • Contact resistance is reduced to minimal levels and is uniformly low over the length of the tube.
  • tube wall displacement is a function of applied electromagnetic forces and may be reflected in either an expansion of an inner tube or contraction of an outer tube.
  • shrinking of the outer tube is contemplated in order that direct action may be exerted upon confronting surfaces of the outer tube and the fin material, the electromagnetic forming process lending itself readily to an arrangement in which an assembled tube is bodily received within a forming coil.
  • Objects of the invention are to provide an improved method substantially of the class described resulting in improved utilization of the principle of contact resistance, specifically advancing the pertaining segment of the heat transfer art.
  • FIG. 1 is a detail view in perspective of an outer tube comprised in a tube assembly produced in accordance with the method of the invention
  • FIG. 2 is a view in perspective of an inner tube useful alternatively as a backup means and as a means to apply a compressive force;
  • FIG. 3 is a view in perspective of a length of fin material as interposed between the inner and outer tubes;
  • FIG. 4 is a view in longitudinal section, partly diagrammatic, showing a tube assembly within an electromagnetic forming coil and indicating the direction of applied force;
  • FIG. 5 is a detail fragmentary view like FIG. 4, showing the parts after completion of the forming operation;
  • FIG. 6 is a fragmentary view of a tube as shown in FIG. 5, enlarged with respect thereto;
  • FIG. 7 is a view in cross section taken through an assembled tube.
  • a tube assembly as achieved by the method of the invention includes an outer tube 10 made of a metal of good thermal and electrical conductivity.
  • the tube is of a uniform diameter, is relatively thin walled and is open at both ends.
  • an inner tube 11 which may be constructed like the tube 10 but which in any event provides a relatively unyielding exterior for the seating thereon of fin material as will hereinafter more clearly appear.
  • the inner tube is designed solely for use as a backup means for the fin material. At least one end thereof is closed, as by crushing or pinching an end 12.
  • the tube assembly is a strip 13 of fin material.
  • the strip 13 is comprised of a thin gauge, ductile metal of good conductivity. Originally in sheet form, it is gathered and crimped to a corrugated formation to define a series of parallel fins 14 of longitudinal extent. Each fin comprises a peak portion 15 connected by inclining beam portions and vertically spaced valley portions 17 to adjacent fins.
  • the fins 14 are formed with a ruffled configuration, that is, with continuous undulations from side to side along the length thereof. A fluid flowing through the fins accordingly is subjected to repeated changes of direction with turbulent effect yielding increased heat transfer efficiency.
  • the method of the invention involves a preassembly of the parts in which fin strip 13 is rolled to an annular configuration about inner tube 11 with these parts then being inserted as a subassembly into outer tube 10.
  • the strip 13 With the parts so positioned, the strip 13 has an outer surface presented for contact with the inner wall of tube 10 and an inner surface presented for contact with the exterior of inner tube II.
  • the parts will have a relatively close fit in which they are frictionally held in an assembled relation. High points on the fin strip will at least lightly engage confronting tube surfaces, but the relationship of the fin surfaces to the wall surfaces is irregular and numerous locations exist of high-contact resistance, as indicated in FIG. 4.
  • a preassembled tube is inserted in an electromagnetic forming coil 21.
  • This is a device storing and releasing electrical energy which assumes the form of magnetic pressure with respect to a workpiece.
  • the forming coil has a cylindrical shape and is suitably connected to a power source to draw energy for a period of seconds, store it and then release the energy in a fraction of a second to do work at a high-energy rate.
  • the coil is constructed to have a length exceeding that of the tube so that a fully inserted tube is completely contained within the coil which overlaps the ends thereof. Approximately centered within the coil, the tube is completely and uniformly subject to the magnetic field exerted by the discharging coil 21.
  • electrically conductive outer tube 10 becomes the work piece. It is subjected, in response to release of the stored electrical energy, to a force proportional to the intensity of the magnetic field and current. The generated force results in a movement of the conductor, in this instance the tube 10.
  • the coil since it completely. surrounds the tube 10, applies a force directed radially inwardly so that the material of the tube is displaced in this direction resulting in a reduction in tube diameter.
  • all parts of the tube are independently and equally responsive to the inwardly directed pressure.
  • the tube is uniformly affected by the electrical discharge it is free to conform to the underlying surface against which it is pressed.
  • the tube is not compressed upon a fixed die but rather upon a relatively compressible member as defined by the fin strip 13.
  • the contracting tube applies a compressive pressure to the fin material, squeezing it between the inner wall of the outer tube 10 and the outer surface of inner tube 11. Peaks l and valleys 17 are to a limited extent distorted by such compressive forces but the beamlike walls 16 provide effective resistance inhibiting a uniform crushing of the fin. Fluid passageways as defined by the fins l4 accordingly remain open.
  • the tube is constrained thereby the flow into a conforming relation to the high and low points 18 and 19 of the tin surface as well as to low areas existing in consequence of manufacturing tolerance.
  • the tube effects a glovelike fit with the fin strip 13 and may assume externally an irregular or undulating configuration matching that of the fin strip.
  • FIGS. 5, 6 and 7 The parts are shown in FIGS. 5, 6 and 7 in the position they assume following application of the electromagnetic forces.
  • the tube 10 has decreased in diameter, shrinking slightly away from adapter 22 and assuming an irregular configuration, shown in greater detail in the expanded segmental view of FIG. 6.
  • the undulating configuration of the tube has been somewhat exaggerated.
  • the conforming configuration assumed by the outer tube does in fact exist and is effective to apply a substantially uniform compression to the entire fin strip.
  • the strip is accordingly subjected over its entire area to a firm, pressural contact with the outer tube wall assuring a low, uniform level of contact resistance.
  • means for energizing coil 21 are not shown as being unessential to an understanding of the method of the invention. They may include a suitable charging circuit, switching and capacitor means. Arrows 23 in FIG. 4 illustrate how current discharging from the coil 21 is directed as an inwardly forming pulse upon the tube 10.
  • a formed tube assembly is withdrawn from the forming coil and is ready for use.
  • Installations thereof may include one in which a plurality of formed tubes are disposed in a bundle for flow of a first fluid over and around the tube exteriors.
  • a second fluid, in separated relation to the first, is controlled and directed to pass longitudinally through the tubes.
  • the flow is in a annular form, inner tube 11 being closed.
  • the flowing fluid is in contact with the inner wall of tube 10 and is also in contact with the material of fin strip 13. Assuming the fluids to be of different temperature, a transfer of heat takes place through the tube wall.
  • the tube wall serves as primary heat transfer surface with respect to the second fluid in contact therewith.
  • the material of fin strip 13 acts as a secondary surface, conducting heat to or from the tube wall.
  • the uniform tight fitting engagement of the tube wall with the fin surface ensures low-contact resistance for uniformly effective heat transfer.
  • Fin strip 13 assumes the characteristics of a die, and, since it is compressible, yields for the application of uniform compressive forces. If found necessary or desirable, dielike inserts may be placed in the tube ends to define a fixed diameter at these locations to simplify mounting of the tubes in a header plate or the like.
  • the fin strip 13 has been disclosed as having a ruffled configuration and the invention has special merit applied to such a fin since it provides a method heretofore unknown of achieving excellent contact resistance over the rippling fin surface as defined by high and low points 18 and 19.
  • the problem particularly present in the rufi'led fin is to a degree present in all fin constructions, however, due to a practicable inability to maintain precise height dimensions over the full area of a completed fin.
  • the method of the invention accordingly is used with advantage with fins of other configuration, including straight fins.
  • the wave form of the fin strip 13 exists, of course. with respect to both upper and lower surfaces thereof, or with respect to outer and inner surfaces as the strip is bent to an annular configuration.
  • locations of high-contact resistance are present along the exterior of inner tube 11 as well as along the interior of outer tube 10.
  • the electromagnetic forming operation seats the fin strip to the inner tube but with an irregular effect which it has not been attempted to illustrate in FIGS. 5 and 6.
  • the concern is with the interface between the fin material and the outer tube 10.
  • an electroforming coil of expansion effect would be inserted in tube 11.
  • Outer tube 11 would then serve as a back up while tube 11 deforms to a glove fit with the inner fin surface.
  • a method of achieving minimal contact resistance to heat transfer between a tube wall and a tube contained fin annulus including the steps of inserting a compressible fin annulus in a tube, said annulus comprising corrugated thin metal deformable material, providing a central support for said annulus, said support rigidly backing said fin annulus, and applying a radial compressive force to said fin annulus so that all parts thereof are in closely contacting compressive relation to the interior wall of said tube irrespective of irregularities in fin height, the application of compressive forces being accomplished by displacing the tube wall radially inwardly so that all parts thereof are in closely contacting compressive relation to the fin annulus irrespective of irregularities in fin height, the fin annulus reacting upon said central support and the tube deforming to conform to fin irregularities.
  • a method according to claim 1, wherein the displacement of the tube material is accomplished by electromagnetic forming, a tube and inserted fin annulus and central support being mounted within an electromagnetic coil disposing in a fully surrounding relation to the tube.
  • the fin annulus is comprised of thin deformable sheet metal corrugated to produce alternate peaks and valleys, the sheet being formed to a circular configuration for insertion in the tube to present an outer surface for contact with the tube wall and an inner surface for contact with the said central support, inward displacement of tube material being resisted by the fin material with the tube wall flowing to conform to and uniformly compressed undulations in the outer fin surface.
  • a method of achieving minimal contact resistance to heat transfer between a tube wall and a fin annulus contained in an outer tube, wherein an inner tube is disposed centrally of the fin annulus in support thereof characterized by the step of deforming one of said tubes to reduce the annular space occupied by the fin annulus and apply a compressive force to said annulus, the deforming step being an electromagnetic forming process carried out simultaneously over the length of the fin annulus and accomplishing a glove fit of the deformed tube wall to the contacting surface of the fin annulus in which the tube conforms to and adopts a configuration matching irregularities in the fin surface while uniformly compressing said surface.
  • the fin annulus is comprised of corrugated sheet metal material providing adjacent longitudinal channels defined by alternating peaks and valleys and connecting beam walls, said walls occupying substantially radial positions between said tubes, said peaks and valleys being compressed and said walls being substantially incompressible by the deforming tube to require the tube substantially to conform to the encountered fin surface while deforming peaks and valleys insure close fitting intimate contact between the tube wall and the fin annulus for minimal contact resistance.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US889123A 1969-12-30 1969-12-30 Method of making a heat exchange tube Expired - Lifetime US3636607A (en)

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US88912369A 1969-12-30 1969-12-30

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FR (1) FR2072108B1 (fr)
GB (1) GB1294400A (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783483A (en) * 1970-09-18 1974-01-08 Borg Warner Ltd Method of making a fluid coupling member
US3874053A (en) * 1972-10-18 1975-04-01 Philips Corp Method of manufacturing a radiator
US4059882A (en) * 1976-05-24 1977-11-29 United Aircraft Products, Inc. Method of making an annular tube-fin heat exchanger
FR2369034A1 (fr) * 1976-10-28 1978-05-26 Gen Electric Procede de fabrication d'un echangeur de chaleur a tubes concentriques
US4135298A (en) * 1977-06-21 1979-01-23 The United States Of America As Represented By The Secretary Of The Air Force Deformable heat transfer fin
JPS5447951U (fr) * 1977-09-09 1979-04-03
US4186495A (en) * 1976-11-30 1980-02-05 Werner Frischmann Apparatus for freeze drying of gas, especially compressed air
US4215454A (en) * 1978-04-07 1980-08-05 United Aircraft Products, Inc. Attaching fin material to a heat transfer or like surface
US4419802A (en) * 1980-09-11 1983-12-13 Riese W A Method of forming a heat exchanger tube
US4633939A (en) * 1982-02-11 1987-01-06 Modine Manufacturing Heat transfer device for oil temperature regulator
US20030218333A1 (en) * 2002-05-24 2003-11-27 Elliott Tool Technologies Ltd. System and method for joining tubes to sheets in a tubular heat transfer system
US20050045315A1 (en) * 2003-08-29 2005-03-03 Seager James R. Concentric tube heat exchanger and end seal therefor
US20050155748A1 (en) * 2003-08-29 2005-07-21 Dana Canada Corporation Concentric tube heat exchanger end seal therefor
US20060048921A1 (en) * 2004-09-08 2006-03-09 Usui Kokusai Sangyo Kaisha Limited Fin structure, heat-transfer tube having the fin structure housed therein, and heat exchanger having the heat-transfer tube assembled therein
US20090133259A1 (en) * 2006-04-26 2009-05-28 Yutaka Yoshida Method for manufacturing hydrogen generator
CN101210780B (zh) * 2006-12-30 2010-10-20 卡特彼勒公司 具有非平行冷却散热片的冷却系统
CN101210779B (zh) * 2006-12-30 2010-12-01 卡特彼勒公司 具有带扁平顶部的弯曲散热片的冷却系统
US20160040940A1 (en) * 2014-08-06 2016-02-11 Indian Institute Of Technology Kanpur Microfluidic devices and methods for their preparation and use
US20170065975A1 (en) * 2015-09-08 2017-03-09 Spacepharma SA Liquid reservoir for microgravity system
US20180252475A1 (en) * 2015-08-25 2018-09-06 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
CN110030087A (zh) * 2019-03-28 2019-07-19 西北工业大学 一种正弦型纵向波纹翅片构型的发动机主动冷却通道
US20200017349A1 (en) * 2018-07-11 2020-01-16 Riprup Company S.A. Flow-type carbonization device with improved disinfection properties and beverage dispenser having such device
US10995998B2 (en) * 2015-07-30 2021-05-04 Senior Uk Limited Finned coaxial cooler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE425224B (sv) * 1977-11-29 1982-09-13 Flygt Ab Sett att forbinda tva ringformiga element

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1840724A (en) * 1929-11-25 1932-01-12 Moraine Products Company Process of bonding cooling fins to cylinders
US2692763A (en) * 1952-03-08 1954-10-26 Air Preheater Supporting spacer for annular corrugated fins
US3005036A (en) * 1957-11-21 1961-10-17 Atlas E E Corp Tube shield
US3088200A (en) * 1960-11-10 1963-05-07 Dale H Birdsall Magnetic shaping process
US3267559A (en) * 1961-12-01 1966-08-23 Martin Marietta Corp Multi-contoured structures and process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1246917A (fr) * 1959-10-16 1960-11-25 Perfectionnements à la fabrication de tuyaux ondulés
FR1429634A (fr) * 1965-03-26 1966-02-25 Euratom Procédé magnétique de formage de gorges profondes sur des pièces ayant une forme plate ou une forme de tubes, et dispositif pour la mise en oeuvre de ce procédé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1840724A (en) * 1929-11-25 1932-01-12 Moraine Products Company Process of bonding cooling fins to cylinders
US2692763A (en) * 1952-03-08 1954-10-26 Air Preheater Supporting spacer for annular corrugated fins
US3005036A (en) * 1957-11-21 1961-10-17 Atlas E E Corp Tube shield
US3088200A (en) * 1960-11-10 1963-05-07 Dale H Birdsall Magnetic shaping process
US3267559A (en) * 1961-12-01 1966-08-23 Martin Marietta Corp Multi-contoured structures and process

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783483A (en) * 1970-09-18 1974-01-08 Borg Warner Ltd Method of making a fluid coupling member
US3874053A (en) * 1972-10-18 1975-04-01 Philips Corp Method of manufacturing a radiator
US4059882A (en) * 1976-05-24 1977-11-29 United Aircraft Products, Inc. Method of making an annular tube-fin heat exchanger
FR2369034A1 (fr) * 1976-10-28 1978-05-26 Gen Electric Procede de fabrication d'un echangeur de chaleur a tubes concentriques
US4096616A (en) * 1976-10-28 1978-06-27 General Electric Company Method of manufacturing a concentric tube heat exchanger
US4186495A (en) * 1976-11-30 1980-02-05 Werner Frischmann Apparatus for freeze drying of gas, especially compressed air
US4135298A (en) * 1977-06-21 1979-01-23 The United States Of America As Represented By The Secretary Of The Air Force Deformable heat transfer fin
JPS5447951U (fr) * 1977-09-09 1979-04-03
US4215454A (en) * 1978-04-07 1980-08-05 United Aircraft Products, Inc. Attaching fin material to a heat transfer or like surface
US4419802A (en) * 1980-09-11 1983-12-13 Riese W A Method of forming a heat exchanger tube
US4633939A (en) * 1982-02-11 1987-01-06 Modine Manufacturing Heat transfer device for oil temperature regulator
US20030218333A1 (en) * 2002-05-24 2003-11-27 Elliott Tool Technologies Ltd. System and method for joining tubes to sheets in a tubular heat transfer system
US20040231157A1 (en) * 2002-05-24 2004-11-25 Elliott Tool Technologies Ltd. System and method for joining tubes to sheets in a tubular heat transfer system
US6857185B2 (en) 2002-05-24 2005-02-22 Iap Research, Inc. Method for electromagnetically joining tubes to sheets in a tubular heat transfer system
US20050045315A1 (en) * 2003-08-29 2005-03-03 Seager James R. Concentric tube heat exchanger and end seal therefor
US20050155748A1 (en) * 2003-08-29 2005-07-21 Dana Canada Corporation Concentric tube heat exchanger end seal therefor
US20060048921A1 (en) * 2004-09-08 2006-03-09 Usui Kokusai Sangyo Kaisha Limited Fin structure, heat-transfer tube having the fin structure housed therein, and heat exchanger having the heat-transfer tube assembled therein
US7303002B2 (en) * 2004-09-08 2007-12-04 Usui Kokusai Sangyo Kaisha Limited Fin structure, heat-transfer tube having the fin structure housed therein, and heat exchanger having the heat-transfer tube assembled therein
US20090133259A1 (en) * 2006-04-26 2009-05-28 Yutaka Yoshida Method for manufacturing hydrogen generator
CN101210780B (zh) * 2006-12-30 2010-10-20 卡特彼勒公司 具有非平行冷却散热片的冷却系统
CN101210779B (zh) * 2006-12-30 2010-12-01 卡特彼勒公司 具有带扁平顶部的弯曲散热片的冷却系统
US20160040940A1 (en) * 2014-08-06 2016-02-11 Indian Institute Of Technology Kanpur Microfluidic devices and methods for their preparation and use
US10995998B2 (en) * 2015-07-30 2021-05-04 Senior Uk Limited Finned coaxial cooler
US20180252475A1 (en) * 2015-08-25 2018-09-06 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
US10690420B2 (en) * 2015-08-25 2020-06-23 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
US20170065975A1 (en) * 2015-09-08 2017-03-09 Spacepharma SA Liquid reservoir for microgravity system
US9808805B2 (en) * 2015-09-08 2017-11-07 Spacepharma SA Liquid reservoir for microgravity system
US20200017349A1 (en) * 2018-07-11 2020-01-16 Riprup Company S.A. Flow-type carbonization device with improved disinfection properties and beverage dispenser having such device
CN110030087A (zh) * 2019-03-28 2019-07-19 西北工业大学 一种正弦型纵向波纹翅片构型的发动机主动冷却通道

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FR2072108A1 (fr) 1971-09-24
GB1294400A (en) 1972-10-25
FR2072108B1 (fr) 1975-07-04

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