US3366172A - Heat exchanger tube support and tube assembly - Google Patents

Heat exchanger tube support and tube assembly Download PDF

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Publication number
US3366172A
US3366172A US520559A US52055966A US3366172A US 3366172 A US3366172 A US 3366172A US 520559 A US520559 A US 520559A US 52055966 A US52055966 A US 52055966A US 3366172 A US3366172 A US 3366172A
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United States
Prior art keywords
tube
heat exchanger
flanges
flow
stacks
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
US520559A
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English (en)
Inventor
Doroszlai Pal Gyorgy
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.)
Sulzer AG
Original Assignee
Sulzer AG
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Filing date
Publication date
Application filed by Sulzer AG filed Critical Sulzer AG
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Publication of US3366172A publication Critical patent/US3366172A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F28D7/082—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 with serpentine or zig-zag configuration
    • F28D7/085—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 with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions
    • 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
    • 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
    • F28D7/16—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 arranged in parallel spaced relation
    • F28D7/163—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 arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1653—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 arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
    • 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
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • 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
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/40—Shell enclosed conduit assembly
    • Y10S165/401—Shell enclosed conduit assembly including tube support or shell-side flow director
    • Y10S165/405—Extending in a longitudinal direction
    • Y10S165/412—Extending in a longitudinal direction including transverse element, e.g. fin, baffle

Definitions

  • a pair of opposed walls of the heat exchanger are provided with inwardly directed flanges which extend to the straight finned sections of the tube sections so as to confine the rising gas to the finned sections.
  • the tube panels are secured in alternating manner to the top surfaces or bottom surfaces of the flanges.
  • This invention relates to a heat exchanger tube assembly having a plurality of tubes subject to an external cross flow of a gaseous heat carrier.
  • the gases discharged from heat exchangers which are positioned in the flow ducts of the hot gases to be cooled such as, the heat exchangers employed as the reactor cooling medium of a gas cooled nuclear reactor, be discharged with a uniform temperature over the cross section of the discharge area. Therefore, it is necessary that the gas particles of each stream of flow give up approximately the same amount of heat at the end of their passage through the heat exchanger.
  • This invention solves the same problems of the prior art in a much simpler and more efficient manner.
  • the invention provides a heat exchanger tube assembly for interposition in the flow path of a gaseous heat carrier which includes a flow duct housing and a plurality of coiled tube stacks secured within the housing.
  • the flow duct housing has a pair of opposed walls each of which is provided with a plurality of carrying flanges projecting into the interior of the housing at substantially right angles to the flow path of the heat carrier and a removable wall secured to the flange carrying walls for the purpose of assembly and accessibility to the coiled tube stacks.
  • the carrying flanges on each opposed wall are arranged in an offset pattern with respect to the carrying flanges on the opposed wall.
  • Each coiled tube stack which includes a plurality of straight tube portions joined together by reversing bends is secured to the top or bottom surface of the carrying flanges of the opposed walls in alternating manner with respect to the adjacent coiled tube stack in order to prevent the carrying flanges 3,366,172 Patented Jan. 30, 1968 from causing a spatial obstruction of the securement of the tube stacks. That is, where one coiled tube stack is secured to the bottom surface of the respective carrying flanges, the adjacent coiled tube stack is secured to the top surface of the same carrying flanges. Further, the carrying flanges are secured to the coiled tube stacks to the extent of the juncture of the respective reversing bends and straight tube portions.
  • saddles are provided on the carrying flanges to engage the coiled tube stacks.
  • the straight tube portions are each provided with suitable fins for the purposes above noted.
  • the mechanical strength of the housing walls may be increased by using corrugated sheets. It is also possible to achieve a particularly closely spaced arrangement of the finned tubes by using the offset arrangement of the coiled tube stacks.
  • FIG. 1 shows a cross section along the line 1-1 of FIG. 2 of a heat exchanger whose pipe bundle is subdivided into individual, parallel, plane pipe coils and is located in a flow duct which carries a heat medium, for example a gas.
  • a heat medium for example a gas.
  • FIG. 2 is a plan view of FIG. 1, partially in section.
  • FIG. 3 is a section along the line III-III of FIG. 1.
  • FIG. 4 illustrates a fragmentary view of the mounting of the pipe coils in the heat exchanger of FIG. 1.
  • FIG. 5 illustrates a perspective view of a saddle.
  • FIG. 6 illustrates a view taken on line 66 of FIG. 7 of a modified heat exchanger of the invention having corrugated walls;
  • FIG. 7 illustrates a view taken on line 77 of FIG. 6.
  • the heat exchanger shown in the embodiment example is intended for fitting into the reactor plant of a gas cooled nuclear reactor.
  • the coiled tubes 3 of the tube bundle through which the heating steam flows are fitted into a flow duct housing 1 of rectangular cross section which is open at the top and bottom.
  • the reactor cooling medium for example CO which carries the heat, flows in the direction of the arrow A (FIG. 1), so that the tubes 3 are subject to a cross flow by the gaseous heat carrier.
  • Several of such flow duct housings are located adjacently in a pressure vessel in an actual embodiment of such a reactor plant.
  • a single flow duct housing of this type may be 2 x 2 x 10 m. and may have a weight of more than 100 tons.
  • the wall 2 of the duct housing 1 is detachable and is secured with the screws 6 to two fixed walls of the housing 1, these walls being located opposite each other.
  • the straight, parallel tube sections 3 are provided with circular fins 7 and are joined to each other with finless reversing bends 8 to form plane, parallel tube stacks through which the medium to be heated flows in parallel upwards from below as indicated by the small arrows in FIG. 1.
  • the pipe stacks which are located vertically adjacent in the duct 1 are secured to the carrier flanges 4 with saddles 5.
  • the carrier flanges in turn are welded, parallel to each other and at a certain spacing, onto those walls of the duct 1 which adjoin the wall 2 while the carrier flanges are arranged in offset relation to each other on the two walls.
  • each saddle is formed with a pair of outwardly extending flanges each of which has a bore 12 (FIG. 5) for the passage of a bolt 11 (FIG. 4).
  • Each saddle also has a side 14 which is turned towards a fixed wall of the housing 1 and which is shaped with a lightly upward bend to adjust to a pipe bend 8.
  • the saddles 5 are secured to the carrier flanges 4 over the coiled tube stacks in a manner whereby a single bolt 11 passes through a bore 12 of a saddle on top of the flange 4 and a bore of a saddle on the bottom of the flange 4 and a nut 13 is threaded on the bolt 11 to secure the respective saddles in place,
  • the saddles 5 are thus arranged across the carrier flanges 4 in an alternating above and below manner (FIG. 4).
  • the depending saddles thus act as supports for the coiled tube stacks.
  • the subdivision of the tube bundle into plane, parallel tube stacks results in individual passages which may extend in a diagonal direction through the tube bundle and through which vibration damping rods are pushed between the pipes 3.
  • vibration damper rods 10 are provided to dampen out tube vibrations which may be caused by the gases which flow transversely against the tubes. These rods are of known structure and use as described in copending US. patent application Ser. No. 531,178, filed Mar. 2, 1966 and need not be further described.
  • the arrangement of the carrier flanges 4 at right angles to the direction of flow of the gas ensures effective throttling of the gas flow in the zone of the reversing bends so that the gas flow extends substantially in the zone of the straight tube sections provided with fins. In this way a temperature distribution of the gas which is uniform over the cross section is obtained in a simple manner at the end of the heat exchanger.
  • the walls of the housing 1 are formed in another embodi ment from sheets in a corrugated manner in order to increase the mechanical strength of the walls.
  • the remainder of the heat exchanger is similar to that described above.
  • a heat exchanger tube assembly for interposition in the flow path of a gaseous heat carrier comprising a flow duct housing interposed in the flow path of the heat carrier, said flow duct housing having a pair of opposed walls,
  • each of said coiled tube stacks being staggered with respect to an adjacent tube stack and having a plurality of straight tube portions, a plurality of reversing bends joining said straight tube portions together in a single plane parallel to said pair of opposed walls, and a plurality of radially extending fins on each of said straight tube portions, said carrying flanges being secured to each said coiled tube stack to the extent of the juncture of said reversing bends and said straight tube portions whereby the flow path of the gaseous heat carrier is confined to said finned straight tube portions so as to maintain a uniform temperature over the cross section of the discharge area of the tube assembly.
  • a heat exchanger tube assembly for interposition in the flow path of a gaseous heat carrier comprising a flow duct housing interposed in the flow path of the heat carrier, said flow duct housing having a pair of opposed walls;
  • each of said coiled tube stacks having a plurality of straight tube portions, a plurality of reversing bends joining said straight tube portions together, and a plurality of radially extending fins on each of said straight tube portions, said carrying flanges being secured to each said coiled tube stack to the extent of the juncture of said reversing bends and said straight tube portions whereby the flow path of the gaseous heat carrier is confined in said finned straight tube portions so as to maintain a uniform temperature over the cross section of the discharge area of the tube assembly.
  • a heat exchanger tube assembly as set forth in claim 5 further comprising a plurality of saddles secured on the top and bottom surfaces of each of said carrying flanges for securing said coiled tube stacks thereon.
  • FOREIGN PATENTS 8 A heat exchanger tube assembly as set forth in claim 5 7 wherein each of said opposed walls and said removable 818O28 8/1959 Great Bntam' Wall is corrugated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US520559A 1965-01-21 1966-01-14 Heat exchanger tube support and tube assembly Expired - Lifetime US3366172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH88565A CH428814A (de) 1965-01-21 1965-01-21 Abstützung für ein Bündel quer angeströmter Rohre eines Wärmeübertragers

Publications (1)

Publication Number Publication Date
US3366172A true US3366172A (en) 1968-01-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US520559A Expired - Lifetime US3366172A (en) 1965-01-21 1966-01-14 Heat exchanger tube support and tube assembly

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US (1) US3366172A (fr)
CH (1) CH428814A (fr)
FR (1) FR1462841A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143709A (en) * 1977-03-15 1979-03-13 Westinghouse Electric Corp. Tube support system
US4552292A (en) * 1982-11-12 1985-11-12 General Electric Company Heat exchanger
US20160265851A1 (en) * 2013-11-28 2016-09-15 Flowforce Co., Ltd. Heat exchanger and method for manufacturing same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278086A (en) * 1940-01-02 1942-03-31 Buensod Stacey Air Conditionin Extended surface heat exchanger
GB818028A (en) * 1956-07-10 1959-08-12 Babcock & Wilcox Ltd Improvements in tubulous heat exchange apparatus
US3267914A (en) * 1964-10-27 1966-08-23 Foster Wheeler Corp Economizer support
US3277958A (en) * 1962-11-27 1966-10-11 Babcock & Wilcox Ltd Heat exchangers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278086A (en) * 1940-01-02 1942-03-31 Buensod Stacey Air Conditionin Extended surface heat exchanger
GB818028A (en) * 1956-07-10 1959-08-12 Babcock & Wilcox Ltd Improvements in tubulous heat exchange apparatus
US3277958A (en) * 1962-11-27 1966-10-11 Babcock & Wilcox Ltd Heat exchangers
US3267914A (en) * 1964-10-27 1966-08-23 Foster Wheeler Corp Economizer support

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143709A (en) * 1977-03-15 1979-03-13 Westinghouse Electric Corp. Tube support system
US4552292A (en) * 1982-11-12 1985-11-12 General Electric Company Heat exchanger
US20160265851A1 (en) * 2013-11-28 2016-09-15 Flowforce Co., Ltd. Heat exchanger and method for manufacturing same

Also Published As

Publication number Publication date
FR1462841A (fr) 1966-12-16
CH428814A (de) 1967-01-31

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