EP0037854A1 - Tube pour un échangeur de chaleur, en particulier pour un évaporateur, et méthode pour sa fabrication - Google Patents

Tube pour un échangeur de chaleur, en particulier pour un évaporateur, et méthode pour sa fabrication Download PDF

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Publication number
EP0037854A1
EP0037854A1 EP80107846A EP80107846A EP0037854A1 EP 0037854 A1 EP0037854 A1 EP 0037854A1 EP 80107846 A EP80107846 A EP 80107846A EP 80107846 A EP80107846 A EP 80107846A EP 0037854 A1 EP0037854 A1 EP 0037854A1
Authority
EP
European Patent Office
Prior art keywords
tube
corrugated
roughness
rollers
metal strip
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Withdrawn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
EP80107846A
Other languages
German (de)
English (en)
Inventor
Klaus Dipl.-Ing. Schimmelpfennig
Harry Ing.-Grad. Staschewski
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.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
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 KM Kabelmetal AG filed Critical KM Kabelmetal AG
Publication of EP0037854A1 publication Critical patent/EP0037854A1/fr
Withdrawn legal-status Critical Current

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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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
    • F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • F28F1/424—Means comprising outside portions integral with inside portions
    • F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex

Definitions

  • the invention relates to a tube for heat exchanger purposes, in particular for evaporators, consisting of a metal tube with an annular or helical corrugation.
  • the invention is based, in particular for use as an evaporator, to improve the known corrugated tube heat exchanger tube in such a way that evaporation on the surface of the corrugated tubes is significantly intensified.
  • This object is achieved according to the invention in that the inner and / or the outer surface of the corrugated tube is plastically deformed in such a way that a uniform micro-roughness with a depth of 10 to 250 ⁇ m is produced.
  • the micro-roughness accelerates the vapor bubble formation, increases the vapor bubble frequency, and increases the number of vapor bubble formation centers per unit area, so that heat Exchangers in which pipes are used according to the teaching of the invention have a higher efficiency than the known heat exchangers.
  • the micro roughness is particularly advantageous due to the large number of evenly distributed cones. Such a micro roughness can be produced in a particularly economical manner. Another possibility is to sandblast the surface of the corrugated pipe.
  • the invention further relates to a method for producing a heat exchanger tube. In this method, a metal strip, preferably made of copper, drawn continuously from a supply spool is passed between two rollers, at least one of which has knurling on its working surface, the metal strip is deformed to form a slotted tube and its strip edges are connected by means of arc welding under protective gas. Finally the pipe is corrugated. With the aid of the method according to the invention, corrugated pipes with a uniform micro-roughness have been successfully produced. In particular, the method is suitable for economically providing the desired microroughness to the inner surface of a relatively thin-walled tube with a wall thickness of less than 0.5 mm and a diameter of less than 30 mm.
  • a copper tube 1 with a helical corrugation which has a wall thickness of 0.3 mm and an outer diameter of 15 mm, has on its inner surface a micro-roughness 2 produced by a large number of uniformly distributed impressions.
  • Such a heat exchanger tube is preferably used where a liquid flowing inside a tube is to be evaporated by heat passed through the tube wall from the outside.
  • FIG. 2 shows a section through a part of the tube wall which is provided with artificial boiling-point sites (impressions 3) on the inside.
  • the shape and arrangement of the germ site geometry is preferably regular.
  • a germination point arrangement in which the distances between the germination points are equal to one another (triangles on the same side) has proven particularly favorable.
  • ⁇ T In order to keep the energy losses as small as possible, a small value of ⁇ T should be aimed for. However, this means producing relatively large germ sites.
  • the germination depths For liquids to be evaporated, whose temperature-dependent densities are in the range from 500 kg / m to 1,600 kg / m, the germination depths should be between 50 to 150 ⁇ m and the opening diameter of the germination points should be between 10 to 200 ⁇ m.
  • the circular cone shape represents a favorable germination point geometry. It is particularly easy to produce a cone shape with a square base.
  • the distance from the germination point to the germination point should be such that the bubbles do not touch each other when torn off the heating wall.
  • a soft annealed copper strip 6 is continuously drawn off from a supply reel 5 and passed between two rollers 7 and 8, which can either be driven or designed as drag rollers.
  • the upper roller 8 has knurling on its working surface, which introduces the impressions 3 into the copper strip 6 in a uniform distribution.
  • Behind the rollers 7 and 8, the copper strip 6 passes into a shaping device (not shown in more detail), in which the copper strip 6 is shaped into the slotted tube 9, and the last shaping step of which is a drawing ring 10 which holds the strip edges tightly together.
  • a welding oxide device 11 Arranged behind the drawing ring 10 is a welding oxide device 11, which welds the slotted tube 9 under protective gas to the tube by means of a non-melting electrode.
  • a jaw extraction is designated, which pulls the copper strip 6 and the welded tube through the system and feeds the tube to a corrugated device 13, in which the tube is deformed into a corrugated tube 14.
  • the corrugated tube 14 is then drummed onto a conventional coil 15.
  • a continuous annealing device can be provided behind the rollers 7 and 8 , which reverses the hardening of the material.
  • the heat exchanger tubes according to the teaching of the invention are preferably used as evaporator tubes in heat exchangers for heat pump systems, the refrigerant flowing inside the tube and being vaporized there by supplying heat from the outside.
  • Another preferred area of application is the so-called heat pipe.
  • This is understood to mean a tube which is closed in a vacuum-tight manner at both ends and which is filled with a working medium in a precisely dimensioned manner. If heat is supplied to this heat pipe at one end, the liquid located there evaporates and flows to the cooler end of the heat pipe, where the steam condenses and the condensate is transported back to the warm end of the pipe due to gravity or capillary forces. Due to the micro roughness, a delay in boiling is avoided with certainty and the heat transfer is improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP80107846A 1980-03-19 1980-12-12 Tube pour un échangeur de chaleur, en particulier pour un évaporateur, et méthode pour sa fabrication Withdrawn EP0037854A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803010450 DE3010450A1 (de) 1980-03-19 1980-03-19 Rohr fuer waermetauscherzwecke, insbesondere fuer verdampfer
DE3010450 1980-03-19

Publications (1)

Publication Number Publication Date
EP0037854A1 true EP0037854A1 (fr) 1981-10-21

Family

ID=6097609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107846A Withdrawn EP0037854A1 (fr) 1980-03-19 1980-12-12 Tube pour un échangeur de chaleur, en particulier pour un évaporateur, et méthode pour sa fabrication

Country Status (2)

Country Link
EP (1) EP0037854A1 (fr)
DE (1) DE3010450A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119777A2 (fr) * 1983-03-22 1984-09-26 Imperial Chemical Industries Plc Pompe à chaleur centrifuge
FR2631431A1 (fr) * 1988-05-11 1989-11-17 Frigofrance Machine pour la fabrication de glace en ecailles par congelation d'eau de mer
EP0819908A3 (fr) * 1996-07-19 1999-06-09 Alcan Alluminio S.p.A. Section laminée pour échangeur de chaleur et méthode de production
EP1202018A3 (fr) * 2000-10-27 2004-04-07 Alcoa Inc. Surface microtexturée d'échange de chaleur
WO2009071698A1 (fr) * 2007-12-06 2009-06-11 Erk Eckrohrkessel Gmbh Élément pour transfert de chaleur et/ou mise en oeuvre technique de réaction et procédé de production dudit élément
EP2554292A1 (fr) * 2011-08-05 2013-02-06 Witzenmann GmbH Élément conducteur avec structure de surface ainsi que procédé de fabrication et d'utilisation d'un tel élément conducteur
WO2013079665A1 (fr) * 2011-12-02 2013-06-06 Wickeder Westfalenstahl Gmbh Échangeur de chaleur
EP3097377A1 (fr) * 2014-01-20 2016-11-30 Neotiss SAS Tube amélioré pour échangeur thermique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3424658C2 (de) * 1984-07-02 1986-11-13 Mannesmann AG, 4000 Düsseldorf Wärmeübertragungsrohr, insbesondere Wärmerohr, und Verfahren zum Herstellen desselben
DE19510124A1 (de) * 1995-03-21 1996-09-26 Km Europa Metal Ag Austauscherrohr für einen Wärmeaustauscher
DE102011078730A1 (de) * 2011-07-06 2013-01-10 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076034A1 (fr) * 1970-01-12 1971-10-15 Universal Oil Prod Co
GB1267149A (en) * 1970-06-01 1972-03-15 Universal Oil Prod Co Heat transfer tube with porous boiling-surface
DE2049420A1 (de) * 1970-10-08 1972-04-13 Kabel Metallwerke Ghh Verfahren zur kontinuierlichen Herstellung längsnahtgeschweißter Rohre
DE2420002A1 (de) * 1974-04-25 1975-11-13 Kurt Friedrich Rohr fuer waermetechnische zwecke
GB1427513A (en) * 1972-03-03 1976-03-10 Yorkshire Imperial Metals Ltd Method and apparatus for producing heat exchanger tubes
DE2740582A1 (de) * 1976-09-13 1978-03-16 Plannja Ab Verfahren und vorrichtung zur profilierung eines bandes aus elastoplastischem oder plastischem material
FR2407448A1 (fr) * 1977-11-01 1979-05-25 Borg Warner Surface de transfert de chaleur, procede de preparation de cette surface et procede d'ebullition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076034A1 (fr) * 1970-01-12 1971-10-15 Universal Oil Prod Co
GB1267149A (en) * 1970-06-01 1972-03-15 Universal Oil Prod Co Heat transfer tube with porous boiling-surface
DE2049420A1 (de) * 1970-10-08 1972-04-13 Kabel Metallwerke Ghh Verfahren zur kontinuierlichen Herstellung längsnahtgeschweißter Rohre
GB1427513A (en) * 1972-03-03 1976-03-10 Yorkshire Imperial Metals Ltd Method and apparatus for producing heat exchanger tubes
DE2420002A1 (de) * 1974-04-25 1975-11-13 Kurt Friedrich Rohr fuer waermetechnische zwecke
DE2740582A1 (de) * 1976-09-13 1978-03-16 Plannja Ab Verfahren und vorrichtung zur profilierung eines bandes aus elastoplastischem oder plastischem material
FR2407448A1 (fr) * 1977-11-01 1979-05-25 Borg Warner Surface de transfert de chaleur, procede de preparation de cette surface et procede d'ebullition

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119777A2 (fr) * 1983-03-22 1984-09-26 Imperial Chemical Industries Plc Pompe à chaleur centrifuge
US4793154A (en) * 1983-03-22 1988-12-27 Imperial Chemical Industries Plc Centrifugal heat pump
EP0119777A3 (en) * 1983-03-24 1985-08-07 Imperial Chemical Industries Plc Centrifugal heat pump
FR2631431A1 (fr) * 1988-05-11 1989-11-17 Frigofrance Machine pour la fabrication de glace en ecailles par congelation d'eau de mer
EP0819908A3 (fr) * 1996-07-19 1999-06-09 Alcan Alluminio S.p.A. Section laminée pour échangeur de chaleur et méthode de production
EP1202018A3 (fr) * 2000-10-27 2004-04-07 Alcoa Inc. Surface microtexturée d'échange de chaleur
US6925711B2 (en) 2000-10-27 2005-08-09 Alcoa Inc. Micro-textured heat transfer surfaces
WO2009071698A1 (fr) * 2007-12-06 2009-06-11 Erk Eckrohrkessel Gmbh Élément pour transfert de chaleur et/ou mise en oeuvre technique de réaction et procédé de production dudit élément
EP2554292A1 (fr) * 2011-08-05 2013-02-06 Witzenmann GmbH Élément conducteur avec structure de surface ainsi que procédé de fabrication et d'utilisation d'un tel élément conducteur
WO2013079665A1 (fr) * 2011-12-02 2013-06-06 Wickeder Westfalenstahl Gmbh Échangeur de chaleur
EP3097377A1 (fr) * 2014-01-20 2016-11-30 Neotiss SAS Tube amélioré pour échangeur thermique
EP3097377B1 (fr) * 2014-01-20 2022-04-20 Neotiss SAS Tube amélioré pour échangeur thermique

Also Published As

Publication number Publication date
DE3010450A1 (de) 1981-09-24

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

17P Request for examination filed

Effective date: 19810827

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830117

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHIMMELPFENNIG, KLAUS, DIPL.-ING.

Inventor name: STASCHEWSKI, HARRY, ING.-GRAD.