US3434533A - Gilled pipes for heat exchange - Google Patents

Gilled pipes for heat exchange Download PDF

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Publication number
US3434533A
US3434533A US593138A US3434533DA US3434533A US 3434533 A US3434533 A US 3434533A US 593138 A US593138 A US 593138A US 3434533D A US3434533D A US 3434533DA US 3434533 A US3434533 A US 3434533A
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US
United States
Prior art keywords
heat exchange
gill
gills
foot portion
gilled
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
US593138A
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English (en)
Inventor
Edmond Pignal
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.)
Biraghi SA
Original Assignee
Biraghi 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 Biraghi SA filed Critical Biraghi SA
Application granted granted Critical
Publication of US3434533A publication Critical patent/US3434533A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28F1/14—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
    • F28F1/20—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 attachable to the element

Definitions

  • the invention provides gills or fins that have corrugated legs and an integral foot portion including at least two parallel and axially extending and outwardly protruding ribs adapted to be welded to the surface of the heat exchange tube.
  • This invention relates to tubular heat exchangers of the gilled type and, more particularly, concerns a novel gill structure for substantially increasing the heat exchange coefiicient of the gilled pipes.
  • gills may be radial, axially spaced individual crowns, helically wound continuous strips, or radial, axially extending and circumferentially spaced ribs.
  • This invention pertains to a novel gill structure particularly adapted for tubular heat exchangers having gillS in the form of a plurality of radially offstanding, longitudinally extending and circumferentially spaced strips. Any cross-section along the axis of such heat exchange pipes has a star-like appearance.
  • gills of this type have been made of flat strips of U or L cross-section and welded to the tube by means of a weld of relatively small sectional area.
  • the invention provides gills of U or L cross-section that are corrugated and which, at their foot portion, have at least two adjacent rib-like protrusions adapted to be welded to the heat exchange tube. It was found that heat exchange structures of this construction have remarkably superior heat exchange characteristics and substantially improved mechanical strength.
  • FIG. 1 is a fragmentary cross-section of a gilled tube representing the prior art
  • FIG. 2 is a perspective view of a novel gill according to the invention.
  • FIG. 3 is a fragmentary cross-section of a heat exchange tube provided with the novel gills shown in FIG. 2;
  • FIG. 4 is a perspective view of another embodiment according to the invention.
  • FIG. 1 representing the prior art, there is shown in fragmentary section a heat exchange pipe 1 to which there is welded a fiat, planar gill of U cross-section comprising two spaced, substantially radially offstanding legs 2 and an interconnecting foot portion afiixed to the outer face of tube 1 by means of a longitudinally, axially extending weld 3.
  • FIG. 2 there is shown in perspective a novel gill comprising a pair of substantially parallel
  • legs 4-4 defining the height of the gill, interconnected by an integral foot portion 5.
  • Legs 4 are corrugated, preferably in such a manner that the corrugations extend parallel to one another and along the length dimension of the gill.
  • each leg 4 Immediately adjacent the foot portion 5 each leg 4 has a relatively short, planar portion before the corrugations begin.
  • the corrugations are symmetrical with respect to a plane in which said planar portion lies.
  • the foot portion 5 is provided with a pair of parallel, lengthwise extending and outwardly protruding ribs 6.
  • FIG. 3 shows, in fragmentary section, a heat exchange tube or conduit 7, to the outer face of which there is aflixed a plurality of gills of the structure shown in FIG. 2.
  • These gills, having corrugated legs 8, extend parallel to the longitudinal axis of tube 7 and are arranged in a parallel, circumferentially spaced relation with respect to one another. It is preferred that said corrugations are symmetrical with respect to a plane containing the longitudinal axis of tube 7.
  • Each gill is afiixed to tube 7 by means of a pair of longitudinal, continuous welds along the peak of ribs 6.
  • FIG. 4 there is shown a second embodiment of the gill according to the invention.
  • the gill shown in perspective has an L cross-section and comprises a corrugated leg 10 and an integral foot portion 11 extending substantially normal to leg 10.
  • the foot portion 11 is provided with a pair of parallel, lengthwise extending and outwardly protruding ribs 9.
  • These gills are arranged on the surface of a heat exchange tube in a manner similar to that described in connection with the embodiment of FIG. 2.
  • novel gill structure In addition to the improved heat exchange characteristics th novel gill structure also has improved mechanical strength.
  • the double weld ensures a more stable securing means without increase in the thickness of the material and the corrugated nature of the radially olfstanding legs makes them less vulnerable to deformations or other mechanical damage during storage, transportation, installation or other handling operation.
  • a heat exchanger comprising: (a) a tubular conduit having an external face, and (b) a plurality of circumferentially spaced gills secured to said external face and disposed thereon parallel with the longitudinal axis of said conduit, said gills being axially elongated and each including (1) an axially continuous foot portion extending throughout the length of said gill and disposed substantially parallel with and adjacent 3 9 said external face, said foot portion having at least two axially extending ribs projecting towards said external face and secured thereto by means of a Weld, and (2) at least one leg integral with said foot portion and extending substantially normal thereto, said leg provided with a plurality of radially spaced corrugations extending axially throughout the length of said gill, said corrugations being symmetrical with a plane containing said axis and passing through said leg.
  • An elongated gill adapted to be afiixed to the surface of a heat exchange conduit comprising a foot portion extending throughout the length of said gill and adapted to be disposed immediately adjacent and parallel with the surface and at least one corrugated leg integral with said foot portion and including a relatively short planar portion immediately adjacent said foot portion and extending substantially normal thereto, the corrugations of said leg being symmetrical with respect to a plane lying in said short planar portion.

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  • 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 Or Joining Of Plastics Or The Like (AREA)
US593138A 1965-11-26 1966-11-09 Gilled pipes for heat exchange Expired - Lifetime US3434533A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1636965A CH427868A (fr) 1965-11-26 1965-11-26 Tube à ailettes

Publications (1)

Publication Number Publication Date
US3434533A true US3434533A (en) 1969-03-25

Family

ID=4416751

Family Applications (1)

Application Number Title Priority Date Filing Date
US593138A Expired - Lifetime US3434533A (en) 1965-11-26 1966-11-09 Gilled pipes for heat exchange

Country Status (9)

Country Link
US (1) US3434533A (zh)
AT (1) AT278063B (zh)
BE (1) BE673408A (zh)
CH (1) CH427868A (zh)
DE (1) DE1994723U (zh)
ES (1) ES320881A1 (zh)
FR (1) FR1460382A (zh)
GB (1) GB1069179A (zh)
NL (1) NL6515855A (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132772U (zh) * 1974-04-16 1975-10-31
JPS50134764U (zh) * 1974-03-14 1975-11-06
US4224984A (en) * 1974-03-20 1980-09-30 Sharp Kabushiki Kaisha Finned tube useful for heat exchangers
US4543943A (en) * 1982-03-11 1985-10-01 Webasto-Werk W. Baier Gmbh & Co. Heater fired with liquid fuel
WO1987002443A1 (en) * 1985-10-11 1987-04-23 Neste Oy Heat transfer member and procedure for manufacturing same
WO2001081022A1 (de) * 2000-04-22 2001-11-01 Bruendermann Georg Rippenrohr
US20110226782A1 (en) * 2010-03-17 2011-09-22 Gm Global Technology Operations, Inc. Gas temperature moderation within compressed gas vessel through heat exchanger

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4159739A (en) * 1977-07-13 1979-07-03 Carrier Corporation Heat transfer surface and method of manufacture

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US833486A (en) * 1905-06-14 1906-10-16 James H Sager Means for cooling hot bodies.
US851978A (en) * 1906-03-09 1907-04-30 Jesse W Bigsby Explosive-engine cylinder.
US1821080A (en) * 1930-10-15 1931-09-01 Engineering Products Corp Inc Radiator
US3305013A (en) * 1963-11-01 1967-02-21 Webasto Werk Baier Kg W Heat radiator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US833486A (en) * 1905-06-14 1906-10-16 James H Sager Means for cooling hot bodies.
US851978A (en) * 1906-03-09 1907-04-30 Jesse W Bigsby Explosive-engine cylinder.
US1821080A (en) * 1930-10-15 1931-09-01 Engineering Products Corp Inc Radiator
US3305013A (en) * 1963-11-01 1967-02-21 Webasto Werk Baier Kg W Heat radiator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50134764U (zh) * 1974-03-14 1975-11-06
JPS5632790Y2 (zh) * 1974-03-14 1981-08-04
US4224984A (en) * 1974-03-20 1980-09-30 Sharp Kabushiki Kaisha Finned tube useful for heat exchangers
JPS50132772U (zh) * 1974-04-16 1975-10-31
US4543943A (en) * 1982-03-11 1985-10-01 Webasto-Werk W. Baier Gmbh & Co. Heater fired with liquid fuel
WO1987002443A1 (en) * 1985-10-11 1987-04-23 Neste Oy Heat transfer member and procedure for manufacturing same
WO2001081022A1 (de) * 2000-04-22 2001-11-01 Bruendermann Georg Rippenrohr
US6843273B2 (en) 2000-04-22 2005-01-18 Georg Brundermann Gilled pipe
US20110226782A1 (en) * 2010-03-17 2011-09-22 Gm Global Technology Operations, Inc. Gas temperature moderation within compressed gas vessel through heat exchanger

Also Published As

Publication number Publication date
AT278063B (de) 1970-01-26
ES320881A1 (es) 1966-10-01
CH427868A (fr) 1967-01-15
DE1994723U (de) 1968-10-17
BE673408A (zh)
NL6515855A (zh) 1967-05-29
GB1069179A (en) 1967-05-17
FR1460382A (fr) 1966-06-17

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