US20100132929A1 - Heat exchanger with welded exchange plates - Google Patents

Heat exchanger with welded exchange plates Download PDF

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Publication number
US20100132929A1
US20100132929A1 US12/298,938 US29893807A US2010132929A1 US 20100132929 A1 US20100132929 A1 US 20100132929A1 US 29893807 A US29893807 A US 29893807A US 2010132929 A1 US2010132929 A1 US 2010132929A1
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US
United States
Prior art keywords
heat exchanger
heat
plates
weld
welded
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.)
Abandoned
Application number
US12/298,938
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English (en)
Inventor
Jean-Noel Fernandez
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.)
Mersen France PY SAS
Original Assignee
Carbone Lorraine Equipements Genie Chimique SAS
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 Carbone Lorraine Equipements Genie Chimique SAS filed Critical Carbone Lorraine Equipements Genie Chimique SAS
Assigned to CARBONE LORRAINE EQUIPEMENTS GENIE CHIMIQUE reassignment CARBONE LORRAINE EQUIPEMENTS GENIE CHIMIQUE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FERNANDEZ, JEAN-NOEL
Publication of US20100132929A1 publication Critical patent/US20100132929A1/en
Assigned to MERSEN FRANCE PY SAS reassignment MERSEN FRANCE PY SAS CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CARBONE LORRAINE EQUIPEMENTS GENIE CHIMIQUE
Abandoned 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Definitions

  • the present invention relates to a heat exchanger with welded heat-exchange plates, in order to achieve an exchange of heat between a first fluid and a second fluid.
  • European patent No. EP 0639258 B1 offers a solution which removes the stresses of differential expansion, between the heat-exchange block constituted by all the stacked plates, on the one hand, and the frame on the other hand, thanks to “corner gutters” that are secured to the aforementioned connecting walls, and that partially surround the uprights of the frame, with the possibility of relative sliding.
  • the heat exchanger according to European patent No. EP 0639258 B1 has advantageous features, in terms of behavior at temperature, relative to the prior embodiments, also known, of heat exchangers with welded plates, such as those described in European patent applications EP 0165179 A and EP 0186592 A.
  • the heat-exchange plates tend to expand lengthwise, in a direction perpendicular to the connecting walls situated at their ends.
  • the corresponding expansion stress is calculated by the ratio F/S, F being the expansion force and S the section of the weld withstanding this stress.
  • the invention provides enhancements to the heat exchanger with welded plates, as described in European patent No. EP 0639258 B1, for the purpose of enhancing its behavior at temperature, and notably to prevent the risk of breakage under the effect of the expansion stresses.
  • the essential subject of the invention is a heat exchanger with welded heat-exchange plates, of the type considered above, that is to say comprising previously swaged metal plates assembled in twos by welding on two opposite sides in order to form stacked modular elements defining two independent circuits respectively for a first fluid and for a second fluid, the ends of the heat-exchange plates being welded by being placed alongside one another on the edge of openings made in the opposite connecting walls, perpendicular to said plates, in order to form an overall parallelepipedal heat-exchange block which is assembled to four posts or corner uprights belonging to the frame of the heat exchanger, this exchanger being characterized in that, on their sides to be assembled, the two swaged metal plates constituting each modular element are on each side pressed flat against one another over a predefined width, are joined together by a first weld made in this width and providing the mechanical cohesion of the assembly, and are also joined together along their outer edges by a second weld providing the seal.
  • the invention replaces the usual “edge-to-edge” assembly of the two swaged plates with a particular configuration consisting in carrying out a “dimpling” of one of the plates and even of both plates, so that both plates are juxtaposed over a predefined width, preferably at least equal to fifteen millimeters, allowing the achievement of a double weld.
  • the first weld which is a spot weld or a laser weld or an electrode wheel weld, ensures the mechanical cohesion of the assembly, that is to say its resistance to pressure.
  • the second weld which is advantageously a weld of the “TIG” or “plasma” type, for its part simply ensures the seal. The total weld section is therefore greatly increased, making the assembly of the plates much stronger.
  • each post or corner upright of the frame of the heat exchanger with welded heat-exchange plates has a beveled inner edge, the adjacent connecting wall being connected to the post or corner upright in the region of this beveled edge.
  • the heat-exchange plates tend to expand, they may take with them the connecting walls which then comprise a possibility of additional deformation, by bending in the space released by the beveled edges of the posts or corner uprights.
  • the expansion stress is therefore absorbed largely by the bending, now made possible, of the connecting wall.
  • each connecting wall comprises, in its two lateral zones, bellows-like conformations for its connection to the post or corner upright, in the region of the beveled edge.
  • the bellows-like conformations which may each consist simply of two inverted folds together forming a sort of sinewave, facilitate, as required, an expansion along an axis perpendicular to the direction of longitudinal expansion of the heat-exchange plates.
  • the beveled edges of the posts or uprights offer a free space used here not only for the bending of the connecting walls, but also for the housing and the deformation of the bellows-like conformations.
  • FIG. 1 is a partial and very schematic view, in exploded perspective, showing the general principle of assembling a heat exchanger of the type covered by the present invention
  • FIG. 2 is a view in cross section illustrating the current method of assembling the plates of such an exchanger, on one of their sides;
  • FIG. 3 is a view in section similar to FIG. 2 , but illustrating the method of assembly according to the present invention
  • FIG. 4 is a view in section passing through one of the corner zones of such an exchanger, and illustrating the current method of connection between a connecting wall and a post or corner upright;
  • FIG. 5 is a view in section similar to FIG. 4 , but illustrating the method of connection according to the present invention
  • FIG. 6 is a view in horizontal section of a heat exchanger according to the present invention.
  • FIG. 7 is a view in perspective showing a detail of the bottom portion of the heat exchanger of FIG. 6 .
  • a heat exchanger with welded heat-exchange plates comprises a series of modular elements 2 , of generally square or rectangular shape, that are stacked and all assembled between two opposite connecting walls 3 , of rectangular shape, perpendicular to the modular elements 2 .
  • These modular elements 2 have a very elongated section, and their ends are welded, by being placed alongside, on the edges of parallel openings 4 arranged in the connecting walls 3 .
  • connecting walls 3 are themselves assembled, along their longitudinal edges (vertical in this instance), to posts or corner uprights 5 , that are four in number.
  • the bottom and top ends of the posts or corner uprights 5 are assembled, respectively, to a bottom support and a top support, not shown in FIG. 1 , to form a complete frame, of generally parallelepipedal shape.
  • each modular element 2 results from the assembly, on two opposite sides, of two metal plates 6 and 7 with at least one of them being previously swaged.
  • FIG. 2 illustrates the current method of assembling the two plates 6 and 7 , on one of the sides (the other side being made in a symmetrical manner).
  • the two plates 6 and 7 are in this instance each folded at 45°, one in the direction of the other, and a single longitudinal weld 8 , of the “TIG” type, joins these two plates 6 and 7 along their edges, brought one against the other.
  • the welded assembly of the end of the latter to the connecting wall is carried out, in the illustrated example (for plates of a thickness of 1.5 mm), over a section of 2 ⁇ 2.8 mm ⁇ 1.5 mm, or 8.4 mm 2 , and this welded assembly has a concentration of stresses at a point, level with the longitudinal weld 8 .
  • FIG. 3 illustrates the solution proposed here by the present invention.
  • One of the plates 6 in this instance remains flat in the region of the side of the modular element 2 , while the other plate 7 is made with a “dimpling”, that is to say that it has a first fold 9 , for example at 45°, followed by a second fold 10 for example at 45° but in the direction opposite to the previous one, leading to the formation of a lateral band 11 of width L, parallel to the main plane of the plate 7 in question.
  • a “dimpling” that is to say that it has a first fold 9 , for example at 45°, followed by a second fold 10 for example at 45° but in the direction opposite to the previous one, leading to the formation of a lateral band 11 of width L, parallel to the main plane of the plate 7 in question.
  • a first weld 12 which may be a spot weld or a laser weld or an electrode wheel weld, ensuring the mechanical strength of the assembly.
  • the two plates 6 and 7 are also joined to one another, along their outer edges, by a second weld 13 which is notably a weld of the “TIG” type, by which in this instance simply the seal is ensured.
  • a second weld 13 which is notably a weld of the “TIG” type, by which in this instance simply the seal is ensured.
  • the two plates 6 and 7 are therefore juxtaposed in the lateral region of the modular element 2 , over a width L equal to at least fifteen millimeters.
  • the embodiment according to the invention achieves, at the assembly of the end of the modular element 2 to the connecting wall, a weld section equal to: [(2 ⁇ 15)+5.6+4] ⁇ 1.5 or 59.4 mm 2 , instead of the 8.4 mm 2 obtained with the current method of assembly.
  • the mechanically strong weld section is therefore multiplied by more than 7, in other words increased by more than 600%.
  • FIG. 4 represents, in horizontal section, one of the corner zones of a heat exchanger, showing a portion of a modular element 2 assembled to a connecting wall 3 , and a post or corner upright 5 belonging to the frame of the heat exchanger. More particularly, this FIG. 4 illustrates the current method of connection between the connecting wall 3 and the post or corner upright 5 , the latter having a usual square section.
  • the connection has a rigidity at the two points P 1 and P 2 , a rigidity which opposes the free longitudinal expansion of the heat-exchange plates, in the direction of the arrow F.
  • FIG. 5 illustrates the solution proposed here by the present invention.
  • the latter consists in beveling the inner edge of the post or corner upright 5 . More particularly, a 45° cut of the two adjacent faces 14 and 15 of the post or upright 5 is made over a width of at least ten millimeters, so as to form a bevel 16 which itself releases a free space 17 of triangular section.
  • the modular element 2 when it tends to expand, in the direction of the arrow F, it may carry with it the adjacent connecting wall 3 , which can bend by entering the free space 17 , the first point of rigidity P 1 being removed.
  • the expansion stress is therefore largely absorbed by the bending of the connecting wall 3 .
  • the connecting wall 3 is connected to the post or corner upright 5 , in each lateral zone, by a bellows-like conformation, resulting from two inverted folds 18 and 19 , giving this wall 3 locally (seen in horizontal section) a sinewave appearance.
  • This bellows-like conformation introduces an additional zone of flexibility, making it easier, if necessary, for the heat-exchange block to expand along an axis perpendicular to the direction of the arrow F.
  • FIG. 6 , and FIG. 7 which represents a detail thereof, also illustrate additional arrangements provided at the base and the top of the heat exchanger, to allow the expansion of the heat-exchange block on two opposite sides.
  • the bottom support of the frame in this instance being marked 20
  • each connecting wall 3 has, at its base, a portion 21 deprived of openings 4 and folded to the horizontal above the bottom support 20 , to which it is attached.
  • On the portion 21 a longitudinal fold 22 is formed which makes it possible to absorb the expansion at this location.
  • similar arrangements are provided in the top portion of the heat exchanger.
  • heat exchanger described above may be produced equally with swaged plates provided with a network of bosses, or dishes, or with swaged plates having parallel ribs or grooves, or else with smooth plates provided with fitted mounting blocks, according to all configurations known per se.
  • These heat-exchange plates may consist of simple metal sheets, for example made of stainless steel.
  • they may also be metal sheets called “sandwich” metal sheets, made on one face with a stainless steel support layer, sufficiently thick to ensure resistance to the pressure, and on the other face by a thin layer made of precious metal or alloy, particularly nickel-based, tantalum-based or zirconium-based.
  • the layer of precious metal protrudes from the stainless steel support layer, and it is possible to produce on the one hand the spot weld 12 ensuring the cohesion of the assembly, and on the other hand the sealing weld 13 of the “TIG” type, only by overlap between the two layers of precious metal or alloy which protrude from the respective stainless steel support layers.
  • Heat exchangers with welded heat-exchange plates may find industrial applications in varied fields: the chemical and pharmaceutical industry, the agribusiness industry, heating installations, etc.

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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)
  • Separation By Low-Temperature Treatments (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US12/298,938 2006-05-12 2007-05-10 Heat exchanger with welded exchange plates Abandoned US20100132929A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0604244 2006-05-12
FR0604244A FR2901016B1 (fr) 2006-05-12 2006-05-12 Echangeur de chaleur a plaques d'echange soudees
PCT/FR2007/000792 WO2007132083A1 (fr) 2006-05-12 2007-05-10 Echangeur de chaleur a plaques d'echange soudees

Publications (1)

Publication Number Publication Date
US20100132929A1 true US20100132929A1 (en) 2010-06-03

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US12/298,938 Abandoned US20100132929A1 (en) 2006-05-12 2007-05-10 Heat exchanger with welded exchange plates

Country Status (14)

Country Link
US (1) US20100132929A1 (fr)
EP (1) EP2021720B1 (fr)
JP (1) JP5313131B2 (fr)
KR (1) KR101344827B1 (fr)
CN (1) CN101443619B (fr)
AT (1) ATE443839T1 (fr)
BR (1) BRPI0712792A2 (fr)
DE (1) DE602007002565D1 (fr)
DK (1) DK2021720T3 (fr)
ES (1) ES2334285T3 (fr)
FR (1) FR2901016B1 (fr)
PL (1) PL2021720T3 (fr)
PT (1) PT2021720E (fr)
WO (1) WO2007132083A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130068428A1 (en) * 2010-06-15 2013-03-21 Alfa Laval Corporate Ab Heat exchanger with improved corrosion resistance
US20160131433A1 (en) * 2013-11-12 2016-05-12 Trane International Inc. Brazed heat exchanger with fluid flow to serially exchange heat with different refrigerant circuits
US10379582B2 (en) * 2014-02-18 2019-08-13 Forced Physics Llc Assembly and method for cooling

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SE534915C2 (sv) * 2010-06-18 2012-02-14 Alfa Laval Corp Ab Plattvärmeväxlare och metod för tillverkning av en plattvärmeväxlare
CN105834652B (zh) * 2016-05-30 2018-07-10 兰州兰石集团有限公司 板对激光焊固定及气体保护工装
CN106152818A (zh) * 2016-06-30 2016-11-23 广州捷玛换热设备有限公司 换热片及其制作工艺
FR3086742B1 (fr) 2018-10-01 2020-10-30 Heurtey Petrochem S A Plaque pour un echangeur de chaleur a plaques
CN109489453B (zh) * 2018-12-11 2023-12-19 河南龙成煤高效技术应用有限公司 换热单元、换热器及换热设备

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Publication number Priority date Publication date Assignee Title
US2539870A (en) * 1946-04-24 1951-01-30 Modine Mfg Co Crossflow heat exchanger
US3111982A (en) * 1958-05-24 1963-11-26 Gutehoffnungshuette Sterkrade Corrugated heat exchange structures
US3669851A (en) * 1970-09-08 1972-06-13 Kewanee Oil Co Method of electrodepositing onto stainless steel
US4214627A (en) * 1977-11-09 1980-07-29 Interliz Anstalt Fire tube for a heating boiler
US4440337A (en) * 1980-10-10 1984-04-03 Klockner-Humboldt-Deutz Aktiengesellschaft Method of producing similar deep-drawn parts
US4442886A (en) * 1982-04-19 1984-04-17 North Atlantic Technologies, Inc. Floating plate heat exchanger
US4596285A (en) * 1985-03-28 1986-06-24 North Atlantic Technologies, Inc. Heat exchanger with resilient corner seals
US4805695A (en) * 1986-04-25 1989-02-21 Sumitomo Heavy Industries, Ltd. Counterflow heat exchanger with floating plate
US5186250A (en) * 1990-05-11 1993-02-16 Showa Aluminum Kabushiki Kaisha Tube for heat exchangers and a method for manufacturing the tube
US5505256A (en) * 1991-02-19 1996-04-09 Rolls-Royce Plc Heat exchangers and methods of manufacture thereof
WO1993022608A1 (fr) * 1992-05-05 1993-11-11 Fernandez Jean Noel Echangeur de chaleur a plaques soudees
US6399216B1 (en) * 1997-09-17 2002-06-04 Gas Research Institute Corrosion-resistant coatings for steels used in bromide-based absorption cycles
US6736193B2 (en) * 1998-11-10 2004-05-18 Valeo Thermique Moteur Side member for heat exchanger and heat exchanger incorporating side plate
US20010032716A1 (en) * 2000-03-09 2001-10-25 Wolf-Dieter Consilius Heat exchanger element
US6651332B2 (en) * 2000-12-22 2003-11-25 Xenesys Inc. Method for manufacturing heat transfer member
US6725911B2 (en) * 2001-09-28 2004-04-27 Gas Research Institute Corrosion resistance treatment of condensing heat exchanger steel structures exposed to a combustion environment
US20030160116A1 (en) * 2002-02-22 2003-08-28 Molnar James R. Solenoid-type fuel injector assembly having stabilized ferritic stainless steel components
US20050252645A1 (en) * 2002-06-28 2005-11-17 Methanol Casale S.A. Multiservice heat exchange unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130068428A1 (en) * 2010-06-15 2013-03-21 Alfa Laval Corporate Ab Heat exchanger with improved corrosion resistance
US20160131433A1 (en) * 2013-11-12 2016-05-12 Trane International Inc. Brazed heat exchanger with fluid flow to serially exchange heat with different refrigerant circuits
US9903663B2 (en) * 2013-11-12 2018-02-27 Trane International Inc. Brazed heat exchanger with fluid flow to serially exchange heat with different refrigerant circuits
US10379582B2 (en) * 2014-02-18 2019-08-13 Forced Physics Llc Assembly and method for cooling
US11327540B2 (en) 2014-02-18 2022-05-10 Forced Physics Llc Assembly and method for cooling

Also Published As

Publication number Publication date
PT2021720E (pt) 2010-01-04
CN101443619A (zh) 2009-05-27
BRPI0712792A2 (pt) 2012-09-11
KR20090016581A (ko) 2009-02-16
JP2009537006A (ja) 2009-10-22
EP2021720B1 (fr) 2009-09-23
FR2901016A1 (fr) 2007-11-16
FR2901016B1 (fr) 2008-07-18
DK2021720T3 (da) 2010-02-01
ATE443839T1 (de) 2009-10-15
PL2021720T3 (pl) 2010-07-30
DE602007002565D1 (de) 2009-11-05
WO2007132083A1 (fr) 2007-11-22
JP5313131B2 (ja) 2013-10-09
EP2021720A1 (fr) 2009-02-11
ES2334285T3 (es) 2010-03-08
KR101344827B1 (ko) 2013-12-26
CN101443619B (zh) 2010-12-08

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