EP0169478A1 - Rippenwärmetauschrohr - Google Patents

Rippenwärmetauschrohr Download PDF

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Publication number
EP0169478A1
EP0169478A1 EP85108874A EP85108874A EP0169478A1 EP 0169478 A1 EP0169478 A1 EP 0169478A1 EP 85108874 A EP85108874 A EP 85108874A EP 85108874 A EP85108874 A EP 85108874A EP 0169478 A1 EP0169478 A1 EP 0169478A1
Authority
EP
European Patent Office
Prior art keywords
tube
strip
fin
welded
exchanger
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Withdrawn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
EP85108874A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Semedard
Jean-Pierre Peyrelongue
Josette Trinquet
Monique Lagrange
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.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
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 Stein Industrie SA filed Critical Stein Industrie SA
Publication of EP0169478A1 publication Critical patent/EP0169478A1/de
Withdrawn legal-status Critical Current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
    • 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 present invention relates to an exchanger tube having cooling fins for extending the heat exchange surface.
  • the fins are constituted by a strip of strip wound on a spiral edge around the tube and welded all along.
  • the strip of strip is generally notched at regular intervals on its outer edge so as to form notches in order to allow its winding on the tube which also promotes the circulation of the external fluid.
  • tubes made of special steels such as stainless steel.
  • the heat efficiency of the exchanger is not optimum and it is necessary to produce large exchangers.
  • the present invention therefore aims to achieve a finned exchanger tube applicable to the case of a tube made of a metal relatively poor conductor of heat and which nevertheless can operate with a fluid at very high temperature without excessive stresses due to differential expansions, and making it possible to produce an exchanger ensuring good heat exchange between the fluids internal and external to the tube, while being as small as possible in size.
  • the present invention therefore relates to a finned exchanger tube, consisting of a tube around which is wound a metal strip welded at its base to the tube, said metal strip being produced by the assembly, by butt welding, of two strips of different metals, the one welded to the tube having a coefficient of expansion very close to that of the tube, characterized in that the fin is welded on edge to the tube, and in that the strip located the furthest outside has a higher coefficient of thermal conductivity than that of the tube.
  • said metal strip includes notches extending from the outside until slightly beyond the weld between the two strips constituting said strip.
  • FIG. 1 therefore represents a portion of a tube 1 of a heat exchanger comprising a fin 2 wound in a helix around the tube.
  • the tube 1 is for example a stainless steel tube conveying for example liquid sodium at 550 ° C.
  • the fin 2 is made in two parts. It consists of a heel 3 made from a strip 4 of stainless steel (fig. 2) and a crenellated outer part 5 made from a strip 6 (fig.2) of another metal, having better thermal conductivity than the stainless steel of the tube 1 and the heel 3, for example nickel.
  • the fin 2 is thus wound in a helix around the tube 1 and welded by its heel against the tube.
  • the strip 4 constituting the heel 3 of the fin 2 is made, in the example cited, of the same metal as that of the tube 1. It is optionally possible to use a different metal provided that its coefficient of expansion is very close to that of the tube metal.
  • the arrangement according to the invention makes it possible to avoid the stresses due to differential expansions, while improving the heat exchange coefficients thanks to the part 5 of the fin 2 made of metal having better thermal conductivity.
  • the strips 4 and 6 are not necessarily of the same thickness. Furthermore, in the case of a tube 1 of large diameter or else if the width of the external strip 6 is small, the cuts 7 can be omitted.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP85108874A 1984-07-19 1985-07-16 Rippenwärmetauschrohr Withdrawn EP0169478A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8411462 1984-07-19
FR8411462A FR2568000A1 (fr) 1984-07-19 1984-07-19 Tube d'echangeur a ailettes

Publications (1)

Publication Number Publication Date
EP0169478A1 true EP0169478A1 (de) 1986-01-29

Family

ID=9306287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108874A Withdrawn EP0169478A1 (de) 1984-07-19 1985-07-16 Rippenwärmetauschrohr

Country Status (4)

Country Link
EP (1) EP0169478A1 (de)
JP (1) JPS6138398A (de)
ES (1) ES296142Y (de)
FR (1) FR2568000A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240070A (en) * 1992-08-10 1993-08-31 Fintube Limited Partnership Enhanced serrated fin for finned tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100279334B1 (ko) * 1993-07-21 2001-02-01 가노 다다마사 핀 튜브를 사용한 열교환기

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE545480A (de) *
US2226291A (en) * 1939-07-28 1940-12-24 Gen Electric Heat exchanger
US2464735A (en) * 1944-07-07 1949-03-15 Chase Brass & Copper Co Composite heat-exchange fin
US3177937A (en) * 1962-12-10 1965-04-13 James G De Flon Spirally-finned heat exchanger
GB1286241A (en) * 1968-07-04 1972-08-23 British Steel Corp Finned tube preparation
USRE28115E (en) * 1973-08-20 1974-08-13 Tube fins of outwardly-organized materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1286241A (en) * 1918-08-14 1918-12-03 Nat Tire & Rubber Company Tire-support.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE545480A (de) *
US2226291A (en) * 1939-07-28 1940-12-24 Gen Electric Heat exchanger
US2464735A (en) * 1944-07-07 1949-03-15 Chase Brass & Copper Co Composite heat-exchange fin
US3177937A (en) * 1962-12-10 1965-04-13 James G De Flon Spirally-finned heat exchanger
GB1286241A (en) * 1968-07-04 1972-08-23 British Steel Corp Finned tube preparation
USRE28115E (en) * 1973-08-20 1974-08-13 Tube fins of outwardly-organized materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240070A (en) * 1992-08-10 1993-08-31 Fintube Limited Partnership Enhanced serrated fin for finned tube
WO1994003766A1 (en) * 1992-08-10 1994-02-17 Fintube Limited Partnership Enhanced serrated fin for finned tube
AU668768B2 (en) * 1992-08-10 1996-05-16 Fintube Limited Partnership Enhanced serrated fin for finned tube

Also Published As

Publication number Publication date
ES296142U (es) 1987-08-16
ES296142Y (es) 1988-03-16
FR2568000A1 (fr) 1986-01-24
JPS6138398A (ja) 1986-02-24

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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

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL

17P Request for examination filed

Effective date: 19860729

17Q First examination report despatched

Effective date: 19861031

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: 19870510

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PEYRELONGUE, JEAN-PIERRE

Inventor name: LAGRANGE, MONIQUE

Inventor name: TRINQUET, JOSETTE

Inventor name: SEMEDARD, JEAN-CLAUDE