US3630274A - Heat exchanger provided with a thermal barrier - Google Patents

Heat exchanger provided with a thermal barrier Download PDF

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Publication number
US3630274A
US3630274A US826307A US3630274DA US3630274A US 3630274 A US3630274 A US 3630274A US 826307 A US826307 A US 826307A US 3630274D A US3630274D A US 3630274DA US 3630274 A US3630274 A US 3630274A
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US
United States
Prior art keywords
tubes
tube
heat exchanger
tube sheet
sodium
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
US826307A
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English (en)
Inventor
Kornelis Lievense
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.)
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Publication date
Application filed by Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Application granted granted Critical
Publication of US3630274A publication Critical patent/US3630274A/en
Assigned to NEDERLANDSE CENTRALE ORGANISATIE VOOR TOEGEPAST-NATUURWETEN-SCHAPPELIJK ONDERZOEK, THE reassignment NEDERLANDSE CENTRALE ORGANISATIE VOOR TOEGEPAST-NATUURWETEN-SCHAPPELIJK ONDERZOEK, THE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TEN BEHOEVE VAN NIJVERHEID, HANDEL EN VERKEER
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
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
    • F22B1/063—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium for metal cooled nuclear reactors
    • 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
    • F28D7/1607—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 particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0229—Double end plates; Single end plates with hollow spaces

Definitions

  • the invention relates to a heat exchanger in which steam is produced and which operates with liquid metal, as for example sodium as heat-transferring medium, mainlyformed by a casing, inside of which abundle of watertubes or steam tubes is provided attached between tube sheets, and inside of which casing the heat-transferring-medium flows around these tubes.
  • liquid metal as for example sodium as heat-transferring medium
  • the thermal stresses arisen from stationary and nonstationary temperature gradients mainly occur in the area of the tube sheet where the tubes are connected with the tube sheet.
  • Such a gas shield has its drawbackscan for example only be embodied in a heat exchanger of the vertical type, which further necessitates a construction with one or more bent tube bundles so that on either side of these tube bundles such a gas shield can be applied.
  • a heat exchanger is known in which a similar kind of thermal barrier is formedby application of a battle arranged transversely to the tube bundle at some distance of the tube sheet, themedium being stationary between this transverse baffle and the tube sheet, causing likewise a kind of thermal barrier grid to be formed for reduction of the heat transfer to the tube sheet fromthe heat-transferring medium flowing through the heat-exchanger.
  • a large drawback of sucha transverse baffle is, when sodium is applied as heat-transferring-medium in a steam generator that if a leakage should arise in a tube-to-tube-sheet joint, the pressure of a sodium-water reaction. created by this will push aside the transverse baffle in'axial direction, causing a great damage to arise because the transverse baffle-will injure the tubes.
  • thermal shocks from the sodium will be considerably reduced or prevented.
  • tubular spaces will be composed of a number of baffles, together forming a grid, and at one side abutting to the tube sheet.
  • This grid can for example be composed of two rows, provided at a certain angle, of several bafl'les provided parallel to each other, these baffles being provided with notches in such a way that a number of tubular spaces (sleeves) are formed, enclosing the tubes.
  • each sleeve formed by these baffles enclose an individual water tube or steam tube.
  • FIG. l shows a cross section of part of the tube bundle of a heat exchanger in which the positioning of the grid construction composed of tubular channels against the tube sheet is shown.
  • FIG. 2 gives a cross section accordiirgto the line ll-ll in FIG. 1 in the direction of the tube sheet, the arrangement of the baffles being shown.
  • FIG. 3 shows in what way this grid construction is situated with respect to the remaining parts of the heat exchanger.
  • F IG. 1 l are the water tubes or steam tubes, which are attached to tube sheet 2, the tubes corresponding with holes 3 provided in the tube sheet for the connection of the steam tubes with header 4.
  • the grid construction built up from baffles 5 is provided within a short open cylinder 6, with which the grid construction is attached to the tube sheet 2.
  • open cylinder 6 is provided along its periphery with a flange-shaped ring 7 provided with holes, with which the cylinder is attached to the tube sheet by means of tapped bolts 8 and nuts 9.
  • a large number of tubular channels 10, which enclose the steam tubes locally, are formed by two rows, provided at an angle, of bafiles 5, mutually parallel (see FIG. 2).
  • tubular channels are closed at tube sheet side 11 and on the other side 12 they form an openconnection with the remaining inner space of the heat exchanger in which the sodium flows around the steam tubes.
  • a heat exchanger for producing steam and operating with liquid metal as a heat-transferring medium comprising a plurality of water or steam tubes attached between two tube sheets, a casing enclosing said plurality of tubes and in which liquid metal flows around said tubes and a thermal barrier means in the transition area from tubes to tube sheets to reduce heat transfer to the tube sheets and the tubes near their attachment to the tube sheets, said thermal barrier means comprising a plurality of tubular spaces with their walls parallel to the tube walls and enclosing one or more of the tubes along a portion of their length, which spaces are closed on the one side by the tube sheet and on the other side are in open connection with the inner space of the heat exchanger.
  • tubular spaces are formed by a number of baffles, together forming a grid, and at one side abutting to the tube sheet.
  • a heat exchanger according to claim 1 wherein each tubular space encloses an individual tube.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US826307A 1968-05-30 1969-05-21 Heat exchanger provided with a thermal barrier Expired - Lifetime US3630274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6807673A NL6807673A (fr) 1968-05-30 1968-05-30

Publications (1)

Publication Number Publication Date
US3630274A true US3630274A (en) 1971-12-28

Family

ID=19803786

Family Applications (1)

Application Number Title Priority Date Filing Date
US826307A Expired - Lifetime US3630274A (en) 1968-05-30 1969-05-21 Heat exchanger provided with a thermal barrier

Country Status (8)

Country Link
US (1) US3630274A (fr)
JP (1) JPS4833670B1 (fr)
BE (1) BE733751A (fr)
DE (1) DE1927388C3 (fr)
FR (1) FR2009633B1 (fr)
GB (1) GB1262377A (fr)
LU (1) LU58745A1 (fr)
NL (1) NL6807673A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236576A (en) * 1978-09-14 1980-12-02 Borsig Gmbh Heat exchangers with tube bundles
US4418748A (en) * 1981-02-02 1983-12-06 Commissariat A L'energie Atomique Heat exchanger whose hot end has a device for protecting the tube plate
US4537249A (en) * 1981-02-02 1985-08-27 The United States Of America As Represented By The United States Department Of Energy Heat flux limiting sleeves
WO2013164083A1 (fr) * 2012-05-01 2013-11-07 Benteler Automobiltechnik Gmbh Échangeur thermique pourvu d'un canal d'alimentation
WO2018017773A1 (fr) * 2016-07-19 2018-01-25 Lummus Technology Inc. Échangeur de chaleur à effluent d'alimentation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2224841A1 (de) * 1971-05-26 1972-12-07 Atomic Energy Authority Uk Wärmetauscher
FR2183539B1 (fr) * 1972-05-09 1974-12-20 Stein Industrie
FR2509432B1 (fr) * 1981-07-08 1986-07-11 Electricite De France Perfectionnement aux generateurs de vapeur boites a eau et a vapeur spheriques
FR2509431A1 (fr) * 1981-07-08 1983-01-14 Electricite De France Dispositif de compensation des dilatations dans un generateur de vapeur
IT1200308B (it) * 1986-10-29 1989-01-12 Ansaldo Spa Schermo termico a nido d ape per scambiatori di calore
MX173351B (es) * 1989-06-14 1994-02-22 Carrier Corp Cabezal para un intercambiador de calor tubo dentro de tubo

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825463A (en) * 1954-12-31 1958-03-04 Standard Oil Co Thermal diffusion apparatus
US3029796A (en) * 1959-08-26 1962-04-17 Wallace R Simmons Sodium-water heat exchanger
US3132691A (en) * 1959-02-06 1964-05-12 Babcock & Wilcox Co Heat exchanger construction and thermal shield therefor
US3140792A (en) * 1957-05-28 1964-07-14 Babcock & Wilcox Ltd Pressure vessel closure member
DE1205121B (de) * 1959-05-02 1965-11-18 Scheer & Cie C F Stehender Waermetauscher

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1225967A (fr) * 1967-03-22 1971-03-24

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825463A (en) * 1954-12-31 1958-03-04 Standard Oil Co Thermal diffusion apparatus
US3140792A (en) * 1957-05-28 1964-07-14 Babcock & Wilcox Ltd Pressure vessel closure member
US3132691A (en) * 1959-02-06 1964-05-12 Babcock & Wilcox Co Heat exchanger construction and thermal shield therefor
DE1205121B (de) * 1959-05-02 1965-11-18 Scheer & Cie C F Stehender Waermetauscher
US3029796A (en) * 1959-08-26 1962-04-17 Wallace R Simmons Sodium-water heat exchanger

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236576A (en) * 1978-09-14 1980-12-02 Borsig Gmbh Heat exchangers with tube bundles
US4418748A (en) * 1981-02-02 1983-12-06 Commissariat A L'energie Atomique Heat exchanger whose hot end has a device for protecting the tube plate
US4537249A (en) * 1981-02-02 1985-08-27 The United States Of America As Represented By The United States Department Of Energy Heat flux limiting sleeves
WO2013164083A1 (fr) * 2012-05-01 2013-11-07 Benteler Automobiltechnik Gmbh Échangeur thermique pourvu d'un canal d'alimentation
WO2018017773A1 (fr) * 2016-07-19 2018-01-25 Lummus Technology Inc. Échangeur de chaleur à effluent d'alimentation
EA038419B1 (ru) * 2016-07-19 2021-08-26 Ламмус Текнолоджи Инк. Теплообменник "входящий/выходящий поток"

Also Published As

Publication number Publication date
LU58745A1 (fr) 1969-09-15
FR2009633B1 (fr) 1973-12-21
BE733751A (fr) 1969-11-03
NL6807673A (fr) 1969-12-02
DE1927388B2 (de) 1980-01-24
DE1927388A1 (de) 1969-12-04
FR2009633A1 (fr) 1970-02-06
GB1262377A (en) 1972-02-02
JPS4833670B1 (fr) 1973-10-16
DE1927388C3 (de) 1980-09-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: NEDERLANDSE CENTRALE ORGANISATIE VOOR TOEGEPAST-NA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TEN BEHOEVE VAN NIJVERHEID, HANDEL EN VERKEER;REEL/FRAME:003864/0013

Effective date: 19801222