US3250324A - Heat exchanger having extended heat transfer surfaces - Google Patents

Heat exchanger having extended heat transfer surfaces Download PDF

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Publication number
US3250324A
US3250324A US371459A US37145964A US3250324A US 3250324 A US3250324 A US 3250324A US 371459 A US371459 A US 371459A US 37145964 A US37145964 A US 37145964A US 3250324 A US3250324 A US 3250324A
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US
United States
Prior art keywords
plates
heat
plain
plate
gas
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
US371459A
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English (en)
Inventor
Hicks John Gordon Clayton
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.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
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 English Electric Co Ltd filed Critical English Electric Co Ltd
Application granted granted Critical
Publication of US3250324A publication Critical patent/US3250324A/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
    • F28F1/24—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 transversely
    • F28F1/32—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 transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • 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
    • F28F1/24—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 transversely
    • F28F1/32—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 transversely the means having portions engaging further 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/50—Side-by-side conduits with fins
    • Y10S165/501—Plate fins penetrated by plural conduits
    • Y10S165/502—Lanced

Definitions

  • such a heat exchanger includes at least one duct for the second fluid and at least one extended heat-transfer surface arranged on the outside of said duct or ducts in direct heat-transfer relationship therewith and in the flow path of said first fluid, the extended heat-transfer surface or surfaces having a plurality of discontinuous surfaces substantially in line with each other across said flow path, and a plurality of continuous portions of extended heat-transfersurface being arranged between some of said discontinuous surfaces so as to interrupt the succession of the discontinuities in said surfaces.
  • the extended heat-transfer surface comprises a number of first plate members generally parallel to each other, said discontinuities comprising perforations in the first plate members, said continuous portions comprise unperforated second plate members, each of which is arranged between two of said first plate members and parallel thereto.
  • the said continuous portions of extended heat-transfer surface are arranged at intervals less than half of the shortest wave-length of an audible wave in said first fluid.
  • the heat exchanger has a number of heat-exchange elements, each comprising a number of parallel liquidcarrying tubes 10 and a number of substantially fiat metal plates or fins 11 arranged at right angles to the axes of the tubes 10. Spacers 12 are provided around the tubes 10 between the plates 11. Only a few of the plates 11 are shown in the drawing.
  • the majority of the plates 11 have a depressed portion 11A formed by forcing a portion of the metal down- Wardly (as seen in the drawing), parallel to the plate, and so creating a hole 11B in the plate in order to improve its heat transfer characteristics.
  • the depressed portion 11A of each plate is partly separated from the plate so that there is communication between the gas above and below the plate (as seen in the drawing) around the separated sides of the portion 11A and through the hole 11B.
  • the remainder of the plates 11, indicated at 11C are plain plates with no depressed portion, that is to say each plate 11C lies in a single plane.
  • the plates 11 are arranged in the heat-exchange element so that the holes 11B are substantially in line one above the other.
  • the maximum possible wave-length of the standing waves is limited to approximately twice the distance between the plane plates 11C.
  • the plain plates are so spaced that this distance is less than half of the shortest wave-length of an audible standing wave that would occur at a predetermined maximum gas flow velocity in the absence of the plain plates 11C.
  • a standing wave of sufficient wave-length to be audible cannot form when the gas flow is no greater than this predetermined maximum value.
  • Heat exchangers according to the invention may normally be used in any position and are not confined to the position, or directions of liquid and gas flow, shown in the drawing.
  • the spacing of the plain plates 11C may be so arrangedthat not all vibration of the plates is prevented but only that at audible frequencies.
  • the fluid flowing past the plates can be any gaseous fluid, whether dry or not, and it may be arranged to flow in any desired direction with respect to the extended heat transfer surface in contact with it (such as the plates 11).
  • the gas flow may be in a general direction inclined to the plane of the strips, and it may then flow both across the strips through the gaps and along the strips.
  • the strips in successive parallel planes may be staggered in such a way that the longest possible straight gas flow path intersecting the planes is less than half the shortest wave-length of an audible standing wave that would occur at a predetermined maximum gas flow velocity in the absence of such staggering.
  • the plain plates 11C any tendency for vortices shed from the edges of the strips to set up such a standing wave is avoided, in the same way as, in the example described above, by the plain plates 11C.
  • a heat exchanger for transferring heat between a first flowing gaseous fluid and a second fluid comprising a plurality of parallel tubes for the second fluid and -a plurality of parallel flat plates spaced apart and arranged transversely on the outside of said tubes in direct heat exchange therewith, and adapted to receive said first fluid flowing laterally in a flow path across the surfaces of said plates, said plates including a plurality of .plain plates, each said plain plate being separated from the next plain plate in a direction parallel to the tubes by a plurality of further said plates and each said further plate having an elongated bent-out portion extending in a direction parallel to the-plate, joined thereto at each end of said bent-out portion and extending in a direction transverse to said flow path, the spacing between each plain plate and the said next plain plate being less than half the shortest wavelength of an audible wave in said first fluid so as to prevent the formation of standing au- 5 dible waves in said first fluid in a direction parallel-to the 3,135,320 6/1964 Forgo 165151 RO

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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)
US371459A 1963-06-11 1964-06-01 Heat exchanger having extended heat transfer surfaces Expired - Lifetime US3250324A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23165/63A GB1077007A (en) 1963-06-11 1963-06-11 Heat exchangers

Publications (1)

Publication Number Publication Date
US3250324A true US3250324A (en) 1966-05-10

Family

ID=10191220

Family Applications (1)

Application Number Title Priority Date Filing Date
US371459A Expired - Lifetime US3250324A (en) 1963-06-11 1964-06-01 Heat exchanger having extended heat transfer surfaces

Country Status (3)

Country Link
US (1) US3250324A (it)
JP (1) JPS415514B1 (it)
GB (1) GB1077007A (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465128A (en) * 1980-04-22 1984-08-14 Orszagos Koolaj Es Gazipari Troszt Plate floor heat exchanger
US4676304A (en) * 1985-01-15 1987-06-30 Sanden Corporation Serpentine-type heat exchanger having fin plates with louvers
US6321833B1 (en) 1999-10-15 2001-11-27 H-Tech, Inc. Sinusoidal fin heat exchanger
US11225807B2 (en) 2018-07-25 2022-01-18 Hayward Industries, Inc. Compact universal gas pool heater and associated methods
US12110707B2 (en) 2020-10-29 2024-10-08 Hayward Industries, Inc. Swimming pool/spa gas heater inlet mixer system and associated methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325876C1 (de) * 1983-07-18 1985-02-07 Dieter Prof. Dr.-Ing. 7500 Karlsruhe Wurz Rippenrohranordnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005235A (en) * 1931-07-22 1935-06-18 Modine Mfg Co Radiator structure
US3135320A (en) * 1959-03-09 1964-06-02 Licencia Talalmanyokat Heat exchangers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005235A (en) * 1931-07-22 1935-06-18 Modine Mfg Co Radiator structure
US3135320A (en) * 1959-03-09 1964-06-02 Licencia Talalmanyokat Heat exchangers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465128A (en) * 1980-04-22 1984-08-14 Orszagos Koolaj Es Gazipari Troszt Plate floor heat exchanger
US4676304A (en) * 1985-01-15 1987-06-30 Sanden Corporation Serpentine-type heat exchanger having fin plates with louvers
US6321833B1 (en) 1999-10-15 2001-11-27 H-Tech, Inc. Sinusoidal fin heat exchanger
US11225807B2 (en) 2018-07-25 2022-01-18 Hayward Industries, Inc. Compact universal gas pool heater and associated methods
US11649650B2 (en) 2018-07-25 2023-05-16 Hayward Industries, Inc. Compact universal gas pool heater and associated methods
US12110707B2 (en) 2020-10-29 2024-10-08 Hayward Industries, Inc. Swimming pool/spa gas heater inlet mixer system and associated methods

Also Published As

Publication number Publication date
JPS415514B1 (it) 1966-03-26
GB1077007A (en) 1967-07-26

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