EP0094578A1 - Tube à transfert de chaleur - Google Patents

Tube à transfert de chaleur Download PDF

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Publication number
EP0094578A1
EP0094578A1 EP83104516A EP83104516A EP0094578A1 EP 0094578 A1 EP0094578 A1 EP 0094578A1 EP 83104516 A EP83104516 A EP 83104516A EP 83104516 A EP83104516 A EP 83104516A EP 0094578 A1 EP0094578 A1 EP 0094578A1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
tube
transfer tube
chambers
longitudinal webs
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.)
Ceased
Application number
EP83104516A
Other languages
German (de)
English (en)
Inventor
Edmund Dipl.-Ing. Schmid
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.)
Wieland Werke AG
Original Assignee
Wieland Werke 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 Wieland Werke AG filed Critical Wieland Werke AG
Publication of EP0094578A1 publication Critical patent/EP0094578A1/fr
Ceased 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
    • 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
    • F28F1/34—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 obliquely
    • F28F1/36—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 obliquely the means being helically wound fins or wire spirals

Definitions

  • the invention relates to a heat transfer tube with integral ribs running on the outside in a helical line and with inner longitudinal webs, the tube wall and / or longitudinal webs each delimiting separate chambers running in the longitudinal direction of the tube.
  • Heat transfer tubes of the type mentioned, for example according to DE-AS 2.717.802 consist of an externally finned tube and an inner, star-shaped core insert.
  • the outer tube and the core insert are usually made of different metals.
  • the production of such pipes requires several separate operations: a smooth pipe and the core insert have to be produced, the core insert has to be inserted into the smooth pipe, and finally ribs have to be rolled out of the outer smooth pipe, the rolling process being controlled so that the longitudinal webs of the inner core insert more or less engage in the tube wall of the outer tube. Difficulties often arise here, since the connection - and thus the heat transfer - at the contact points is insufficient.
  • the invention is therefore based on the object of specifying a heat transfer tube of the type mentioned which can be produced much more simply with improved heat transfer properties.
  • the object is achieved in that the tube wall and longitudinal webs consist of one piece.
  • Rectangular tubes with inner longitudinal chambers and outer longitudinal webs are known, for example, from US Pat. No. 3,202,212, from whose material fins are worked out and, remaining connected to them, bent away from them. On this basis, however, it is impossible to produce helical outer ribs on round cross-sectioned tubes; because just cutting out the rib material would lead to torn ribs.
  • the heat transfer tube consists of an aluminum alloy.
  • the minimum tube wall thickness D W is at least 1.5 mm or the minimum longitudinal web thickness D L is at least 0.5 mm.
  • the method for producing the heat transfer tube according to the invention is characterized by a combination of the extrusion known per se and the also known finned tube rolling * in such a way that an extruded tube is produced by extrusion and then fins are rolled out on the outer surface of the press tube in that the fin material is obtained by displacing material from the tube wall to the outside by means of a rolling process and the heat transfer tube is rotated by the rolling forces and is advanced according to the resulting fins.
  • the heat transfer tube 1 according to FIGS. 1 and 2 has helical ribs 2 on the outside.
  • the chambers 5 have a round cross section.
  • Ribs 2, tube wall 4 and longitudinal webs 3 consist of one piece, preferably of an aluminum alloy.
  • FIG. 3 schematically shows the production of a heat transfer tube 1.
  • a device cf. in particular FIG. 4
  • the tool holder 9 are each offset by 120 ° on the circumference of the tube 8.
  • the tool holder 9 are radially adjustable. They are in turn arranged in a stationary roller head (not shown).
  • the press tube 8 runs into the device in the direction of the arrow and is rotated by the driven rolling tools 10 arranged on the circumference, the axes of the rolling tools 10 being inclined to the tube axis.
  • the rolling tools 10 consist, in a manner known per se, of a plurality of rolling disks 11 arranged side by side, the diameter of which increases in the direction of the arrow. (Eight rolling disks 11 are indicated in FIG. 4.)
  • the centrally arranged rolling tools 10 form the helically surrounding ribs 2 from the tube wall 4 of the pressing tube 8 in a known manner.
  • the forming of the pressing tube 8 means that no separate rolling mandrel is required.
  • the heat transfer tubes 1 produced in this way showed good heat transfer wearing properties.
  • the tubes were exposed to the outside of the gas flame, water flowed in the chambers 5 as a medium. There were no signs of "hotspot cavitation".

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Paper (AREA)
  • Valve Device For Special Equipments (AREA)
EP83104516A 1982-05-13 1983-05-07 Tube à transfert de chaleur Ceased EP0094578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823217998 DE3217998A1 (de) 1982-05-13 1982-05-13 Waermeuebertragungsrohr
DE3217998 1982-05-13

Publications (1)

Publication Number Publication Date
EP0094578A1 true EP0094578A1 (fr) 1983-11-23

Family

ID=6163473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104516A Ceased EP0094578A1 (fr) 1982-05-13 1983-05-07 Tube à transfert de chaleur

Country Status (4)

Country Link
EP (1) EP0094578A1 (fr)
DE (1) DE3217998A1 (fr)
DK (1) DK214183A (fr)
NO (1) NO831319L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998055813A1 (fr) * 1997-06-05 1998-12-10 American Standard Inc. Echangeur thermique avec tuyauterie a microcanaux

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR362995A (fr) * 1906-02-05 1906-07-18 Paul Determes Tubes doubles à ailettes pour le chauffage ou le refroidissement des liquides
US1823919A (en) * 1929-03-28 1931-09-22 Frigidaire Corp Refrigerating apparatus
US2022173A (en) * 1931-02-18 1935-11-26 Clive M Alexander Heat transfer apparatus
GB601833A (en) * 1944-06-19 1948-05-13 Calumet And Hecla Cons Copper Method of preforming finned tubing and the product thereof
FR1103336A (fr) * 1954-07-01 1955-11-02 Favier Ets Tube à ailettes pour échangeur de température
FR1460063A (fr) * 1965-10-15 1966-06-17 Babcock & Wilcox France Procédé de fabrication de tubes échangeurs de chaleur à ailettes destinés notamment aux applications nucléaires

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR362995A (fr) * 1906-02-05 1906-07-18 Paul Determes Tubes doubles à ailettes pour le chauffage ou le refroidissement des liquides
US1823919A (en) * 1929-03-28 1931-09-22 Frigidaire Corp Refrigerating apparatus
US2022173A (en) * 1931-02-18 1935-11-26 Clive M Alexander Heat transfer apparatus
GB601833A (en) * 1944-06-19 1948-05-13 Calumet And Hecla Cons Copper Method of preforming finned tubing and the product thereof
FR1103336A (fr) * 1954-07-01 1955-11-02 Favier Ets Tube à ailettes pour échangeur de température
FR1460063A (fr) * 1965-10-15 1966-06-17 Babcock & Wilcox France Procédé de fabrication de tubes échangeurs de chaleur à ailettes destinés notamment aux applications nucléaires

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998055813A1 (fr) * 1997-06-05 1998-12-10 American Standard Inc. Echangeur thermique avec tuyauterie a microcanaux
US5967228A (en) * 1997-06-05 1999-10-19 American Standard Inc. Heat exchanger having microchannel tubing and spine fin heat transfer surface

Also Published As

Publication number Publication date
DK214183D0 (da) 1983-05-13
NO831319L (no) 1983-11-14
DK214183A (da) 1983-11-14
DE3217998A1 (de) 1983-11-17

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Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 19830526

AK Designated contracting states

Designated state(s): DE FR GB NL SE

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19850321

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHMID, EDMUND, DIPL.-ING.