US3896874A - Support system for serpentine tubes of a heat exchanger - Google Patents

Support system for serpentine tubes of a heat exchanger Download PDF

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Publication number
US3896874A
US3896874A US240145A US24014572A US3896874A US 3896874 A US3896874 A US 3896874A US 240145 A US240145 A US 240145A US 24014572 A US24014572 A US 24014572A US 3896874 A US3896874 A US 3896874A
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US
United States
Prior art keywords
heat exchanger
support
strips
tubes
tube
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
US240145A
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English (en)
Inventor
Donald J Bongaards
A Robert Giardina
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US240145A priority Critical patent/US3896874A/en
Priority to JP48034165A priority patent/JPS5214462B2/ja
Priority to IT22317/73A priority patent/IT981741B/it
Application granted granted Critical
Publication of US3896874A publication Critical patent/US3896874A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/24—Supporting, suspending or setting arrangements, e.g. heat shielding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
    • 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
    • Y10S165/051—Heat exchange having expansion and contraction relieving or absorbing means
    • Y10S165/052—Heat exchange having expansion and contraction relieving or absorbing means for cylindrical heat exchanger
    • Y10S165/067—Cylindrical heat exchanger rectilinearly slidable relative to its support

Definitions

  • the tubes forming the serpentine tube bundle may have walls as thin as 65.000 of an inch. therefore it is imperative that they be protected from damage.
  • the serpentine arrangement necessarily subjects portions of the tubes to transverse flow and results in resonant vibration.
  • the large temperature differential occurring across the steam generator results in thermal differential expansion, which must be accommodated.
  • the system utilized to support the tubes for such a liquid metal to water heat exchanger warrants judicious analysis to prevent tube damage.
  • To provide an economical heat exchanger its size must be minimized requiring closely spaced tubes. which leaves little room for the tube support system.
  • a support system for supporting closely packed serpentine tubes for a heat exchanger when made in accordance with this invention, comprises a plurality of support strips which are disposed to repeatedly support each serpentine tube. and each support strip is fastened to an adjacent support strip in such a manner that the strips can only move lengthwise with respect to each other.
  • FIG. I is a partial enlarged isometric view of a support system for serpentine tubes made in accordance with this invention.
  • FIG. 2 is a partial sectional view taken on line ll-Il of FIG. 1'.
  • FIG. 4 is a partial sectional view taken on line IV-IV of FIG. I'.
  • FIG. 1 shows I a portion of a tube support system for a nuclear steam generator. in which closely packed serpentine tubes I are utilized to transfer heat from a liquid metal. such'as sodium. which is introduced into the shell side of the heat exchanger to water, which is evaporated to produce steam in the tubes.
  • a liquid metal such'as sodium
  • a serpentine tube bundle is formed by bending a plurality of tubes so that they may be closely packed in a group generally resembling a multiple return bend or serpentine shape.
  • the individual tube rnust'be When disposed vertically in the heat exchanger. the individual tube rnust'be repeatedly supported by the tube support system in order to prevent resonant vibration induced by the transverse flow of liquid metal around the outside of the tubes.
  • the support system as shown in the drawings comprises a plurality of strips or panels 3 depending vertically from a tube sheet 4 of the heat exchanger; each panel 3 is supported at its upper end and depends therefrom.
  • Adjacent panels are fastened together by a pin 7. which slidably fits into a vertical slot 9 in one panel and a hole 11 in the other panel. Collars 13 are fastened to the pin on opposite sides of each panel 3 allowing the panels to move vertically or lengthwise with respect to each other.
  • the pins 7 also provide spaces between adjacent panels to allow liquid metal to flow therebetween.
  • the holes 11 which receive the pins 7 are disposed in cars 15, which extend outwardly from the margins of every other panel 3.
  • the panels 3 are formed by a plurality of flat bars l7, l8 and 19 clamped or fastened together by through bolts 21 or bars plug welded at the ends.
  • Bars 17 and 19 are the outer bars and have a plurality of notches 23 and 25, respectively, spaced longitudinally or lengthwise along one margin thereof, while bars 18 are intermediate bars having a plurality of notches 23 spaced longitudinally along one margin and a plurality of notches 25 spaced lengthwise along the other margin.
  • the notch 23 is U-shaped formed by a semicircular opening 27 with parallel tangential extensions 29, while the notch 25 is a chordal shaped opening 31 smaller than a semicircular opening.
  • the U-shaped and chordal shaped notches 23 and 25 cooperate to form an opening which will receive a tube. but will not contact the tube with a sharp corner or edge if the notches do not register exactly.
  • the bars are chamfered or a radius 31 is formed on both sides of the bar adjacent the notches.
  • the notches 23 register with the notches 25 of an adjacent bar to provide a plurality of openings to repeatedly support a serpentine shaped tube.
  • one row of serpentine tubes is laid in the notches 23 of one of the end bars 17.
  • An intermediate bar 18 is slipped over the through bolts 21 and the notches 25 engage the tube to lock it in position.
  • Another row of tubes is laid in the notches 23 disposed along the opposite margin of the bar I8 and another intermediate bar 18 is put in place; this continues until the bar 19 is in place and the through bolts are tightened or bars plug welded in place to secure thetubes and form a portion of the tube bundle.
  • next portion of the tube bundle is formed in a similar manner, however, the bars 17 and 19 of the next panel have ears which receive the pins 7.
  • the two portions are then assembled by inserting the pins 7 in the slots 9 and holes 11 and fastening the collars 13 to the. pins 7.
  • the slots 9 are disposed lengthwise at regular intervals and are formed by elongated notches in the margins of the bars l7, l8 and 19. Besides allowing for relative longitudinal movement of the panels the slots 9 also allow liquid metal to flow from one side of the panel to the other to help distribute the flow evenly across all portions of the tube surfaces.
  • Lateral support is provided by a plurality of lateral support plates 35 which are fastened to an intermediate bar 18 and extend outwardly normal thereto.
  • the lateral support plates 35 are disposed at the axis of the tube bends and have a plurality of lenthwise spaced openings 37, which receive spacer rod s or bars 39 which are disposed normal to the lateral support plates and are spaced and sized to provide generally equal spacing between the return bends of the tubes and to limit lateral movement of the tubes with respect to the support panels 3.
  • guide pins 41 which are fastened to the heat exchanger by horizontal bars or other means, may be slidably disposed in several of the slots to prevent the long support panels 3 from vibrating in a transverse direction.
  • the guide pins 41 have collars 43 which fasten to the guide pins 41 on each side of the panels 3 to allow the panels to move only lengthwise with respect to the heat exchanger, and to prevent the long support panels 3 from vibrating in a direction perpendicular to the panels 3.
  • the tube support system may utilize multiple panels 3 in parallel relation to support the tube and have lateral support plates 35 which extend outwardly in opposite directions to maintain equal spacing between the reverse bends and to maintain the serpentine tubes in predetermined positions.
  • the pins 7 and 41 may be chrome plated to prevent galling and to allow free lengthwise movement of the panels.
  • the hereinbefore described support system advantageously provides a low cost reliable system which permits adequate thermal expansion, minimizes the effect of transverse fluid flow. which causes tube vibrations, and prevents lateral tube movement. It also advantageously provides the following:
  • Flow holes and staggered tubes support panels, which allow sodium to' flow evenly across all portions of the tube bundle;
  • Panels. which can be made in .half. third or less lengths to reduce stress caused by differential thermal expansion
  • a heat exchanger having a tube bundle of closely packed serpentine tubes and a support system for the tubes, said support system comprising a plurality of support strips, which are disposed to repeatedly support each serpentine tube, means for fastening each support strip to an adjacent support strip in such a manner that the strips can only move lengthwise with respect to each other, and a plurality of lateral support sheets disposed normal to the strips, said support sheets having a plurality of openings spaced lengthwise along the sheet, the openings in adjacent support sheets registering and being adapted to receive a spacer which fits between adjacent rows of tubes.
  • each support strip comprises a bar having a plurality of U-shaped notches spaced along a longitudinal margin thereof and a bar having a chordal shaped notch spaced along a longitudinal margin thereof, and a plurality of bars having a series of U-shaped notches along one margin and a series of chordal notches along the opposite margin, the bars being so disposed that the U- shaped notches register with the chordal shaped notches providing an opening which will accept a tube.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US240145A 1972-03-31 1972-03-31 Support system for serpentine tubes of a heat exchanger Expired - Lifetime US3896874A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US240145A US3896874A (en) 1972-03-31 1972-03-31 Support system for serpentine tubes of a heat exchanger
JP48034165A JPS5214462B2 (esLanguage) 1972-03-31 1973-03-27
IT22317/73A IT981741B (it) 1972-03-31 1973-03-29 Sistema di supporto per tubi a serpentino di un scambiatore di calore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US240145A US3896874A (en) 1972-03-31 1972-03-31 Support system for serpentine tubes of a heat exchanger

Publications (1)

Publication Number Publication Date
US3896874A true US3896874A (en) 1975-07-29

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ID=22905293

Family Applications (1)

Application Number Title Priority Date Filing Date
US240145A Expired - Lifetime US3896874A (en) 1972-03-31 1972-03-31 Support system for serpentine tubes of a heat exchanger

Country Status (3)

Country Link
US (1) US3896874A (esLanguage)
JP (1) JPS5214462B2 (esLanguage)
IT (1) IT981741B (esLanguage)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036289A (en) * 1975-01-20 1977-07-19 General Atomic Company Heat exchanger tube bundle support system
US4114684A (en) * 1977-04-11 1978-09-19 General Electric Company Tube support system for heat exchanger
FR2425620A1 (fr) * 1978-05-09 1979-12-07 Kraftwerk Union Ag Echangeur de chaleur a tubes coudes deux fois a angle droit en forme d'u
US4246872A (en) * 1979-04-30 1981-01-27 General Electric Company Heat exchanger tube support
US4270599A (en) * 1978-09-29 1981-06-02 Foster Wheeler Energy Corporation Tube support structure for a fluidized bed heat exchanger
EP0038543A3 (en) * 1980-04-21 1982-05-05 Phillips Petroleum Company Heat exchanger
WO1983000371A1 (en) * 1981-07-15 1983-02-03 Babcock Power Ltd Waste heat boilers
US4579089A (en) * 1981-11-25 1986-04-01 Kraftwerk Union Aktiengesellschaft Steam generator, especially a continuous flow steam generator
US4685511A (en) * 1985-10-08 1987-08-11 Westinghouse Electric Corp. Tube support for moisture separator reheater
US6244330B1 (en) 1998-11-16 2001-06-12 Foster Wheeler Corporation Anti-vibration ties for tube bundles and related method
CN102221304A (zh) * 2011-07-28 2011-10-19 山东北辰压力容器有限公司 组装式矩形管束支持板
US20130062036A1 (en) * 2010-03-16 2013-03-14 Babcock Borsig Service Gmbh Retaining Element and Spacer Plane of a Tube Bundle
US20130180696A1 (en) * 2012-01-17 2013-07-18 Alstom Technology Ltd. A method and apparatus for connecting sections of a once-through horizontal evaporator
US9746174B2 (en) 2012-01-17 2017-08-29 General Electric Technology Gmbh Flow control devices and methods for a once-through horizontal evaporator
US11519597B2 (en) * 2019-11-08 2022-12-06 General Electric Company Multiple cooled supports for heat exchange tubes in heat exchanger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847192A (en) * 1955-09-12 1958-08-12 Acme Ind Inc Tube supporting and spacing structure for heat exchangers
US3126949A (en) * 1964-03-31 Heat exchanger construction
US3286767A (en) * 1964-10-01 1966-11-22 Babcock & Wilcox Co Tube support arrangement
US3317707A (en) * 1964-08-24 1967-05-02 Mc Graw Edison Co Baseboard heater
US3545537A (en) * 1968-12-13 1970-12-08 Combustion Eng Anti-vibration tube support for vertical steam generator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126949A (en) * 1964-03-31 Heat exchanger construction
US2847192A (en) * 1955-09-12 1958-08-12 Acme Ind Inc Tube supporting and spacing structure for heat exchangers
US3317707A (en) * 1964-08-24 1967-05-02 Mc Graw Edison Co Baseboard heater
US3286767A (en) * 1964-10-01 1966-11-22 Babcock & Wilcox Co Tube support arrangement
US3545537A (en) * 1968-12-13 1970-12-08 Combustion Eng Anti-vibration tube support for vertical steam generator

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036289A (en) * 1975-01-20 1977-07-19 General Atomic Company Heat exchanger tube bundle support system
US4114684A (en) * 1977-04-11 1978-09-19 General Electric Company Tube support system for heat exchanger
FR2425620A1 (fr) * 1978-05-09 1979-12-07 Kraftwerk Union Ag Echangeur de chaleur a tubes coudes deux fois a angle droit en forme d'u
US4270599A (en) * 1978-09-29 1981-06-02 Foster Wheeler Energy Corporation Tube support structure for a fluidized bed heat exchanger
US4246872A (en) * 1979-04-30 1981-01-27 General Electric Company Heat exchanger tube support
EP0038543A3 (en) * 1980-04-21 1982-05-05 Phillips Petroleum Company Heat exchanger
WO1983000371A1 (en) * 1981-07-15 1983-02-03 Babcock Power Ltd Waste heat boilers
US4579089A (en) * 1981-11-25 1986-04-01 Kraftwerk Union Aktiengesellschaft Steam generator, especially a continuous flow steam generator
US4685511A (en) * 1985-10-08 1987-08-11 Westinghouse Electric Corp. Tube support for moisture separator reheater
US6244330B1 (en) 1998-11-16 2001-06-12 Foster Wheeler Corporation Anti-vibration ties for tube bundles and related method
US10222139B2 (en) * 2010-03-16 2019-03-05 Babcock Borsig Service Gmbh Retaining element and spacer plane of a tube bundle
US20130062036A1 (en) * 2010-03-16 2013-03-14 Babcock Borsig Service Gmbh Retaining Element and Spacer Plane of a Tube Bundle
CN102221304A (zh) * 2011-07-28 2011-10-19 山东北辰压力容器有限公司 组装式矩形管束支持板
US20130192810A1 (en) * 2012-01-17 2013-08-01 Alstom Technology Ltd. Tube and baffle arrangement in a once-through horizontal evaporator
US9696098B2 (en) * 2012-01-17 2017-07-04 General Electric Technology Gmbh Method and apparatus for connecting sections of a once-through horizontal evaporator
US9746174B2 (en) 2012-01-17 2017-08-29 General Electric Technology Gmbh Flow control devices and methods for a once-through horizontal evaporator
US9989320B2 (en) * 2012-01-17 2018-06-05 General Electric Technology Gmbh Tube and baffle arrangement in a once-through horizontal evaporator
US20130180696A1 (en) * 2012-01-17 2013-07-18 Alstom Technology Ltd. A method and apparatus for connecting sections of a once-through horizontal evaporator
US10274192B2 (en) 2012-01-17 2019-04-30 General Electric Technology Gmbh Tube arrangement in a once-through horizontal evaporator
US11519597B2 (en) * 2019-11-08 2022-12-06 General Electric Company Multiple cooled supports for heat exchange tubes in heat exchanger

Also Published As

Publication number Publication date
IT981741B (it) 1974-10-10
JPS5214462B2 (esLanguage) 1977-04-21
JPS497842A (esLanguage) 1974-01-24

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