EP2635867B1 - Echangeur de chaleur a plaques soudees, et plaque constitutive d'un tel echangeur - Google Patents

Echangeur de chaleur a plaques soudees, et plaque constitutive d'un tel echangeur Download PDF

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Publication number
EP2635867B1
EP2635867B1 EP11802458.7A EP11802458A EP2635867B1 EP 2635867 B1 EP2635867 B1 EP 2635867B1 EP 11802458 A EP11802458 A EP 11802458A EP 2635867 B1 EP2635867 B1 EP 2635867B1
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EP
European Patent Office
Prior art keywords
plates
bumps
heat exchanger
ribs
vertices
Prior art date
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Application number
EP11802458.7A
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German (de)
English (en)
French (fr)
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EP2635867A1 (fr
Inventor
Jean-Noël FERNANDEZ
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KAPP
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Individual
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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
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations

Definitions

  • the present invention relates to a welded plate heat exchanger as defined in the preamble of claim 1.
  • the invention relates to a heat exchanger which comprises pre-stamped metal plates, assembled in pairs by welding on two opposite sides and thus forming stacked modular elements, all of the plates thus joined together forming an exchange unit.
  • a heat exchanger which comprises pre-stamped metal plates, assembled in pairs by welding on two opposite sides and thus forming stacked modular elements, all of the plates thus joined together forming an exchange unit.
  • the spaces which remain between the pairs of consecutive plates, in other words between two modular elements, define the circuit for the second fluid.
  • ribbed plate exchangers also called “corrugated” plates
  • plate exchangers linked by spacers also called “studded” plates
  • padded plate exchangers the latter can be considered as a variant of plate heat exchangers linked by spacers.
  • each plate of a modular element has parallel ribs, giving this plate a corrugated profile.
  • the ribs of a plate of the modular element have a different direction from that of the ribs of the other plate of the same modular element.
  • numerous points of contact of one plate with the other are thus created over the extent of these plates, which makes it possible to obtain a constant spacing between the two plates.
  • the ribs form undulations which oppose the flow of fluid between the two plates and which generate strong turbulence in this flow.
  • the exchangers thus formed therefore have high efficiency.
  • they have the drawback of having relatively narrow passage sections for the fluid and, given the many points of contact between the two plates, of having great risks of clogging or clogging, in certain applications and according to the fluids involved.
  • the plates In plate heat exchangers linked by spacers, the plates have spacers arranged over their extent, according to a grid with a square or triangular base. Thus, when stacking such plates, fluid circuits are obtained, the thickness of which corresponds to the spacing between consecutive plates, itself determined by the height of said spacers.
  • Padded plate heat exchangers have, over the extent of their plates, bosses arranged in a regular pattern. During the assembly of two plates arranged in opposite directions, the bosses of one plate come into contact with the bosses of the other plate, to form spacers connecting these two plates and fixing their spacing, the corresponding bosses of the two plates being welded together.
  • the patent European EP 0639258 B1 discloses such an embodiment of a heat exchanger with padded plates, with bosses in the form of tapered cups, with a flat bottom, obtained by stamping.
  • the padded plates have the advantage of creating, for one of the fluids, a pressure-resistant circuit.
  • the stamped bosses generate quite correct turbulence in the flow of fluid between the two plates, and thus provide performance close to that of ribbed plates.
  • the circuit for the second fluid delimited between the modular elements formed by two plates joined by their bosses, offers a perfectly free passage and can therefore be very advantageously used for highly loaded fluids.
  • this circuit has the drawback of having a thermal performance close to that of a flat tube, and therefore relatively average.
  • the padded plate heat exchangers thus have performance superior to traditional tubular heat exchangers, but notably inferior to ribbed plate heat exchangers.
  • the present invention aims to provide a welded plate heat exchanger which combines the advantages of the various categories of exchangers previously mentioned, while avoiding their drawbacks, and thus the aim of the invention is to create an exchanger which has high efficiency. thermal, while retaining the possibility of easily cleaning its internal channels, this heat exchanger must moreover be resistant to pressure and be able to be manufactured and assembled in a convenient and economical manner.
  • Another object of the invention is to provide a plate for constituting such an exchanger.
  • the subject of the invention is a heat exchanger with welded plates as defined in claim 1.
  • the bosses of each plate of the exchanger have vertices of flat shape, located in the plane containing the bases or the tops of the ribs of this plate.
  • bosses are distributed over the extent of each plate of the exchanger, according to a predefined pattern and with a more or less dense distribution. These bosses can, in particular, be aligned with certain ribs of each plate of the exchanger, and in this case appear as local interruptions, regularly spaced, of these ribs. For example, bosses are thus formed on one rib on two of each plate of the exchanger. Seen in the direction of the ribs, the bosses may have a staggered arrangement, the bosses formed on a rib being offset, in this direction, with respect to the bosses formed on the next encountered rib provided with bosses.
  • the two plates of a modular element must also be assembled by welding, on two opposite sides.
  • the plates have, for this purpose, respective edges welded to one another, edges which are either located in the plane of the tops of the bosses, or bent at right angles to this plane.
  • a heat exchanger thus produced combines the peculiarities and advantages of ribbed plate exchangers and padded plate exchangers.
  • the heat exchanger according to the invention creates strong turbulence like a traditional ribbed plate heat exchanger, while having excellent resistance to pressure thanks to the connection by welding produced between the plates, over the extent of the latter. .
  • at least one fluid circuit of the exchanger is made very resistant to pressure, and consequently the effects of inflation of the channels and the risks of breakage by fatigue are avoided; this eliminates the limits to which traditional ribbed plate heat exchangers are subject.
  • the plates are assembled two by two by their bosses, one obtains modular elements between which is formed a completely free flow channel, of thickness which can reach for example 25mm, allowing the circulation of highly charged fluids, without risk of obstruction, while retaining the advantage of the ribbed plates with regard to the creation of turbulence.
  • the ribbed plates provided with bosses constitute an excellent compromise between the simply ribbed plates on the one hand, and the padded plates on the other hand, by combining the resistance to the pressure to one of the fluid circuits, free access for cleaning of the other fluid circuit and very high thermal efficiency.
  • each boss located on a rib comprises a flat portion of square or rectangular shape, located at the base of the rib, and two opposite facets, generally triangular in appearance, located in inclined planes and joining the top of the rib.
  • the figure 1 shows two metal plates 1 and 2, of generally square shape, intended to be assembled together to form a modular element 3, itself shown in figure figure 2 , which is meant to be stacked with similar elements in order to constitute a parallelepipedal exchange block.
  • the plate 1, described here mainly, has over its extent ribs 4 and 5 parallel to each other and to a diagonal direction of this plate 1, so that the latter has a general corrugated profile.
  • Every second rib 4 is a continuous rib from end to end.
  • the continuous ribs 4 alternate with ribs 5 which are interrupted locally, at regular intervals, by bosses 6 whose vertices 7 lie in a plane containing the bases of the ribs 4 and 5.
  • the set of bosses 6 has an arrangement in staggered, that is to say that the bosses 6 of a rib 5 are offset (in the longitudinal direction of the ribs) with respect to the bosses 7 of the nearest ribs 5, the offset being equal to a "half step ".
  • each boss 6 has a flat top 7, of square or rectangular shape, and two opposite facets 8 and 9, triangular in shape and located in inclined planes, the inclination of one of the facets 8 being the opposite. of the inclination of the other facet 9.
  • the base of each triangular facet 8 or 9 is situated in the plane of the apex 7 of the boss 6, while the point of this facet is situated at the apex of the corresponding rib 5.
  • the other plate 2 has a configuration similar to that of plate 1.
  • the two plates 1 and 2 each have two first flat and parallel edges 10 and 11, located in the plane of the vertices 7 of their respective bosses 6.
  • Each of the two plates 1 and 2 also has two other edges 12 and 13, parallel to each other but perpendicular to the preceding edges 10 and 11, these other edges 12 and 13 having an offset zone, that is to say located at the level of the base of the bosses 6.
  • tops 7 of the bosses 6 of a plate 1 are also located in correspondence with the tops 7 of the bosses of the other plate 2.
  • the two plates 1 and 2 being close to each other, they are welded together along their edges 10 and 11, as well as at the vertices 7 of their respective bosses 6 which are brought into contact. We then obtain the modular element 3 in which the two plates 1 and 2 also come into contact at the crossing points of their ribs 4 and 5 - see figure 2 .
  • the offset zones of these edges lead to the formation of elongated gills 14, allowing on one side the entry of a fluid and on the other side the exit of. this fluid.
  • the figures 3 to 5 illustrate stacking modes of modular elements 3 thus constituted, for the constitution of an exchange unit.
  • the modular elements 3 are spaced from each other. These modular elements 3, traversed by a first fluid, are thus separated from each other by entirely free spaces 15, in which a second fluid circulates.
  • the spacing and maintenance of the modular elements 3 is ensured by the engagement of their angles, at the junction of the edges 10 to 13, in “combs” 16 provided with parallel slots 17 judiciously spaced apart.
  • the modular elements 3 here advantageously comprise side panels 18 folded at right angles, which laterally close (on two opposite sides) the free spaces 15.
  • the exchange block thus constituted, is itself placed inside a framework or a frame, comprising two parallel square plates 19 and 20 connected by four corner posts 21, as shown in FIG. figure 5 , the side faces of this frame being closed by panels or doors not shown.
  • edges of the plates 1 and 2 may comprise, on two opposite sides, respective edges bent at right angles and welded to one another, to constitute each modular element 3.

Landscapes

  • 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)
EP11802458.7A 2010-11-05 2011-10-31 Echangeur de chaleur a plaques soudees, et plaque constitutive d'un tel echangeur Active EP2635867B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1059128A FR2967247B1 (fr) 2010-11-05 2010-11-05 Echangeur de chaleur a plaques soudees, et plaque constitutive d'un tel echangeur
PCT/FR2011/052552 WO2012059683A1 (fr) 2010-11-05 2011-10-31 Echangeur de chaleur a plaques soudees, et plaque constitutive d'un tel echangeur

Publications (2)

Publication Number Publication Date
EP2635867A1 EP2635867A1 (fr) 2013-09-11
EP2635867B1 true EP2635867B1 (fr) 2021-11-17

Family

ID=44166485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11802458.7A Active EP2635867B1 (fr) 2010-11-05 2011-10-31 Echangeur de chaleur a plaques soudees, et plaque constitutive d'un tel echangeur

Country Status (5)

Country Link
EP (1) EP2635867B1 (pt)
ES (1) ES2901707T3 (pt)
FR (1) FR2967247B1 (pt)
PT (1) PT2635867T (pt)
WO (1) WO2012059683A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI2944912T1 (sl) 2014-05-13 2017-04-26 Alfa Laval Corporate Ab Ploščni toplotni izmenjevalnik

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01203892A (ja) * 1988-02-09 1989-08-16 Mitsubishi Heavy Ind Ltd プレート式熱交換器
JPH07260384A (ja) * 1994-03-28 1995-10-13 Hisaka Works Ltd プレート式熱交換器
JP3543993B2 (ja) * 1994-03-28 2004-07-21 株式会社日阪製作所 プレート式熱交換器
SE9601438D0 (sv) * 1996-04-16 1996-04-16 Tetra Laval Holdings & Finance Plattvärmeväxlare
SE520702C2 (sv) * 2001-12-18 2003-08-12 Alfa Laval Corp Ab Värmeväxlarplatta med minst två korrugeringsområden, plattpaket samt plattvärmeväxlare
US20080078538A1 (en) * 2006-09-28 2008-04-03 Ali Jalilevand Heat exchanger plate having integrated turbulation feature

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2012059683A1 (fr) 2012-05-10
PT2635867T (pt) 2022-01-07
EP2635867A1 (fr) 2013-09-11
FR2967247A1 (fr) 2012-05-11
FR2967247B1 (fr) 2012-11-02
ES2901707T3 (es) 2022-03-23

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