EP0715144A1 - Stack of plates for a heat exchanger - Google Patents

Stack of plates for a heat exchanger Download PDF

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Publication number
EP0715144A1
EP0715144A1 EP95402548A EP95402548A EP0715144A1 EP 0715144 A1 EP0715144 A1 EP 0715144A1 EP 95402548 A EP95402548 A EP 95402548A EP 95402548 A EP95402548 A EP 95402548A EP 0715144 A1 EP0715144 A1 EP 0715144A1
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EP
European Patent Office
Prior art keywords
plates
zone
fluids
heat exchange
bundle
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.)
Granted
Application number
EP95402548A
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German (de)
French (fr)
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EP0715144B1 (en
Inventor
Dominique Sabin
Carlos Da Costa
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.)
Alfa Laval Packinox SAS
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Packinox SA
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Publication date
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Publication of EP0715144A1 publication Critical patent/EP0715144A1/en
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Publication of EP0715144B1 publication Critical patent/EP0715144B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F28D9/0062—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 spaced plates with inserted 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
    • 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
    • F28F3/044—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 pontual, e.g. dimples
    • 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
    • Y10S165/356—Plural plates forming a stack providing flow passages therein
    • 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
    • Y10S165/356—Plural plates forming a stack providing flow passages therein
    • Y10S165/393—Plural plates forming a stack providing flow passages therein including additional element between heat exchange plates
    • Y10S165/394—Corrugated heat exchange plate

Definitions

  • the present invention relates to a bundle of plates for a heat exchanger.
  • the first type of heat exchanger comprises a bundle of tubes in the shape of a "U" or a bundle of straight tubes, in which a fluid circulates.
  • the second type of heat exchanger comprises a bundle of plates arranged contiguously and parallel to each other.
  • the plates made of thin sheets most often made of stainless steel, have edges with a smooth surface and a central part provided with corrugations by which they are in contact with one another and by which they delimit a double circulation circuit of two independent fluids and against the current from one end to the other of the exchanger.
  • the plates are connected to each other at their longitudinal edges by connecting means constituted for example by longitudinal spacers fixed to each other by a sealed weld wall extending over the entire length and over the entire height of the beam.
  • the plates determine, on the one hand, a central zone of transfer and heat exchange between the fluids and, on the other hand, at each end of the bundle, a superposition of inputs and outputs for these fluids.
  • each plate has particular undulations distributed in directions determined on the surface of said plate and which determine the central zone of transfer and heat exchange as well as the inputs and outputs.
  • the inlets and outlets are therefore formed by a superposition of crisscrossing undulations, creating variations in the cross section of the fluids and thereby generating disturbances in the flow of these fluids.
  • the object of the invention is to propose a bundle of plates for heat exchangers which makes it possible to avoid the drawbacks mentioned above.
  • the subject of the invention is therefore a bundle of plates for a heat exchanger, of the type comprising a stack of metal heat exchange plates, parallel to each other and each comprising edges with a smooth surface and a central part provided with corrugations.
  • a double circulation circuit of two independent and counter-current fluids the plates being connected to each other at their longitudinal edges by connecting means and determining, on the one hand, an area transfer and heat exchange between fluids and, on the other hand, at their free ends, an inlet and outlet area for said fluids, characterized in that the inlet and outlet areas for fluids are formed by the ends of the heat exchange plates between which are inserted independent plates and provided with reliefs to ensure the distribution of fluids in the area heat exchange.
  • the bundle of plates for heat exchanger consists of three parts, a central part A and two end parts, respectively B and C.
  • the central part A which constitutes the actual transfer and heat exchange zone consists of a stack of plates 10 parallel to each other.
  • Each plate 10 consists of a thin sheet, most often made of stainless steel, or any other sufficiently ductile material and comprises, in a conventional manner, longitudinal and transverse edges with a smooth surface and, between these edges, corrugations 11.
  • the plates 10 determine between them a double circulation circuit of two independent fluids.
  • the heat exchange fluids circulate longitudinally from one end to the other of the bundle and against the current.
  • the plates 10 are assembled with each other at their longitudinal edges by connecting means constituted for example by bars 12 extending over the entire length of the longitudinal edges of said plates 10 and by a layer of solder 13 deposited over the entire length and over the entire height of each lateral surface of the bundle to form a sealed weld wall.
  • the stack of plates 10 is placed between an upper plate 14 and a lower plate 15 extending over the entire surface of the plates 10 and the edges of which are connected to the edges of said plates 10 by the layers of solder 13.
  • this beam comprises at each of its ends, an inlet and outlet zone for said fluids which constitute the end portions B and C of said bundle.
  • these fluid inlet and outlet zones are formed by a stack of the planar ends 10a of the heat exchange plates 10 between which are inserted plates 21 provided with reliefs, these plates 10 constituting the transfer and heat exchange zone between the fluids.
  • All of the planar ends 10a of the heat exchange plates 10 and of the plates 21 provided with reliefs determine at each end of the bundle and at each circuit of the central zone A, at least one entry (a) of one fluids and at least one outlet (b) from the other of said fluids.
  • the distribution of inputs (a) and outputs (b) at each end of the bundle is a function of the characteristics of the fluids and the heat exchange to be obtained between these fluids.
  • the inputs and outputs include at upper level of the beam an inlet (a) for one of the fluids, at the level below, two outlets (b) for the other of said fluids and so on to the lower level of this beam.
  • the plates 21 provided with reliefs comprise at their longitudinal edges wedges 22 for fixing and spacing with the planar ends 10a of the heat exchange plates 10.
  • Each longitudinal edge of the plates 21 provided with reliefs is fixed on a wedge 22 for example by a weld bead 23.
  • Each assembly formed by the flat ends 10a of the heat exchange plates 10, the plates 21 provided with reliefs and the shims 22, is secured in a sealed manner with the longitudinal edges of the plates 10 forming the zone A for transfer and exchange by the connecting means of these plates 10, that is to say by the welding walls 13.
  • each plate 21 provided with reliefs comprises at least one zone for guiding one of the fluids towards the corresponding circuit and a zone of low circulation of this fluid, separated from the guide zone by at least one zone transition allowing the passage of said fluid between these two zones.
  • the plate 21 provided with reliefs includes a zone 21a for guiding one of the fluids towards the corresponding circuit and a zone 21b for low circulation of this fluid, separated from the zone 21a for guiding by at least one transition zone 21c allowing the passage of said fluid between these two zones 21a and 21b.
  • the guide zone 21a of the plate 21 comprises continuous corrugations 210a which form with the planar ends 10a of the heat exchange plates 10 circulation channels of the corresponding fluid of constant section and oriented towards the circuit in which this fluid circulates.
  • the zone 21b of low circulation of the plate 21 comprises pins 210b for maintaining the spacing with the planar ends 10a of the associated heat exchange plates 10.
  • the transition zone 21c comprises longitudinally discontinuous corrugations 210c forming passages 211c between the guide zone 21a and the low circulation zone 21b.
  • the transition zone 21c ensures the passage of a small quantity of fluid from the guiding zone 21a towards the zone 21b of low circulation so that the latter is bathed by a small quantity of fluid and thus thus a total stagnation of this fluid is avoided in this area.
  • the bundle of plates according to the invention therefore has, at each of its ends, inlet and outlet zones formed by the planar ends of the heat exchange plates between which are inserted independent plates and provided with reliefs which form fluid passages of constant section which allows a uniform flow of fluids to be obtained, thereby improving the efficiency of the plate bundle.

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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)

Abstract

The bundle comprises a stack of parallel stainless steel plates (10). Each plate has smooth surfaced edges and a central undulated part (11) which forms with the plates circuits for two contra-flowing independent fluids. The plates are joined together along their longitudinal sides by a welded wall (13). The fluid inlet and outlet zone are formed by the plane ends (10a) of the parallel plates between which are inserted independent plates (21) having reliefs which ensure fluid distribution in the heat exchange zone. Each plate with reliefs has a zone for guiding one off the fluids towards the corresponding circuit. They also have a zone with a low fluid flow separated from the guide zone by a transition zone allowing passage of fluid between the low flow and guide zones.

Description

La présente invention a pour objet un faisceau de plaques pour échangeur thermique.The present invention relates to a bundle of plates for a heat exchanger.

Les échangeurs thermiques sont généralement de deux types.There are generally two types of heat exchangers.

Le premier type d'échangeurs thermiques comporte un faisceau de tubes en forme de "U" ou un faisceau de tubes droits, dans lequel circule un fluide.The first type of heat exchanger comprises a bundle of tubes in the shape of a "U" or a bundle of straight tubes, in which a fluid circulates.

Mais ce type d'échangeurs est d'une conception coûteuse et le rendement thermique est limité, compte tenu que le nombre de tubes dépend de la place disponible qui est dans la plupart des cas restreinte.However, this type of exchanger is of an expensive design and the thermal efficiency is limited, given that the number of tubes depends on the space available which is in most cases limited.

Le second type d'échangeurs thermiques comporte un faisceau de plaques disposées jointivement et parallèlement les unes aux autres.The second type of heat exchanger comprises a bundle of plates arranged contiguously and parallel to each other.

Les plaques constituées de tôles fines, le plus souvent en acier inoxydable, comportent des bords à surface lisse et une partie centrale munie d'ondulations par lesquelles elles sont en contact les unes sur les autres et par lesquelles elles délimitent un double circuit de circulation de deux fluides indépendants et à contre-courant d'une extrémité à l'autre de l'échangeur.The plates made of thin sheets, most often made of stainless steel, have edges with a smooth surface and a central part provided with corrugations by which they are in contact with one another and by which they delimit a double circulation circuit of two independent fluids and against the current from one end to the other of the exchanger.

Les plaques sont reliées les unes aux autres au niveau de leurs bords longitudinaux par des moyens de liaison constitués par exemple par des entretoises longitudinales fixées entre elles par un mur de soudure étanche s'étendant sur toute la longueur et sur toute la hauteur du faisceau.The plates are connected to each other at their longitudinal edges by connecting means constituted for example by longitudinal spacers fixed to each other by a sealed weld wall extending over the entire length and over the entire height of the beam.

Par ailleurs, les plaques déterminent, d'une part, une zone centrale de transfert et d'échange thermique entre les fluides et, d'autre part, à chaque extrémité du faisceau, une superposition d'entrées et de sorties pour ces fluides.Furthermore, the plates determine, on the one hand, a central zone of transfer and heat exchange between the fluids and, on the other hand, at each end of the bundle, a superposition of inputs and outputs for these fluids.

Jusqu'à présent, chaque plaque comporte des ondulations particulières réparties selon des directions déterminées sur la surface de ladite plaque et qui déterminent la zone centrale de transfert et d'échange thermique ainsi que les entrées et les sorties.Until now, each plate has particular undulations distributed in directions determined on the surface of said plate and which determine the central zone of transfer and heat exchange as well as the inputs and outputs.

Les entrées et les sorties sont donc formées par une superposition d'ondulations qui s'entrecroisent, créant des variations de section de passage des fluides et générant de ce fait des perturbations dans l'écoulement de ces fluides.The inlets and outlets are therefore formed by a superposition of crisscrossing undulations, creating variations in the cross section of the fluids and thereby generating disturbances in the flow of these fluids.

L'invention a pour but de proposer un faisceau de plaques pour échangeurs thermiques qui permet d'éviter les inconvénients mentionnés ci-dessus.The object of the invention is to propose a bundle of plates for heat exchangers which makes it possible to avoid the drawbacks mentioned above.

L'invention a donc pour objet un faisceau de plaques pour un échangeur thermique, du type comprenant un empilement de plaques d'échange thermique métalliques, parallèles les unes aux autres et comportant chacune des bords à surface lisse et une partie centrale munie d'ondulations pour former avec les plaques associées un double circuit de circulation de deux fluides indépendants et à contre-courant, les plaques étant reliées les unes aux autres au niveau de leurs bords longitudinaux par des moyens de liaison et déterminant, d'une part, une zone de transfert et d'échange thermique entre les fluides et, d'autre part, au niveau de leurs extrémités libres, une zone d'entrées et de sorties desdits fluides, caractérisé en ce que les zones d'entrées et de sorties des fluides sont formées par les extrémités des plaques d'échange thermique entre lesquelles sont insérées des plaques indépendantes et munies de reliefs pour assurer la distribution des fluides dans la zone d'échange thermique.The subject of the invention is therefore a bundle of plates for a heat exchanger, of the type comprising a stack of metal heat exchange plates, parallel to each other and each comprising edges with a smooth surface and a central part provided with corrugations. to form with the associated plates a double circulation circuit of two independent and counter-current fluids, the plates being connected to each other at their longitudinal edges by connecting means and determining, on the one hand, an area transfer and heat exchange between fluids and, on the other hand, at their free ends, an inlet and outlet area for said fluids, characterized in that the inlet and outlet areas for fluids are formed by the ends of the heat exchange plates between which are inserted independent plates and provided with reliefs to ensure the distribution of fluids in the area heat exchange.

Selon d'autres caractéristiques de l'invention :

  • l'ensemble de plaques planes et de plaques munies de reliefs déterminent, au niveau de chaque extrémité du faisceau, une superposition d'au moins une entrée de l'un des fluides et d'au moins une sortie de l'autre desdits fluides,
  • chaque plaque munie de reliefs comporte au moins une zone de guidage de l'un des fluides vers le circuit correspondant et une zone de faible circulation de ce fluide, séparée de la zone de guidage par au moins une zone de transition permettant le passage dudit fluide entre ces deux zones,
  • la zone de guidage comporte des ondulations continues,
  • les ondulations continues de la zone de guidage forment avec les extrémités planes des plaques d'échange thermique des canaux de circulation des fluides de section constante et orientés vers les circuits correspondants,
  • la zone de faible circulation comporte des picots de maintien de l'écartement avec les extrémités planes des plaques d'échange thermique associées,
  • la zone de transition comporte des ondulations discontinues longitudinalement formant des passages entre la zone de guidage et la zone de faible circulation,
  • les plaques munies de reliefs comportent au niveau de leurs bords longitudinaux des cales de fixation et d'écartement avec les extrémités planes des plaques d'échange thermique,
  • chaque ensemble, formé par les extrémités des plaques d'échange thermique, les plaques munies de reliefs et les cales, est solidarisé de manière étanche avec les bords longitudinaux des plaques formant la zone de transfert et d'échange par les moyens de liaison de ces plaques.
According to other characteristics of the invention:
  • the set of flat plates and plates provided with reliefs determine, at each end of the beam, a superposition of at least one inlet of one of the fluids and at least one outlet of the other of said fluids,
  • each plate provided with reliefs comprises at least one zone for guiding one of the fluids towards the corresponding circuit and a zone for low circulation of this fluid, separated from the guide zone by at least one transition zone allowing the passage of said fluid between these two areas,
  • the guide zone has continuous undulations,
  • the continuous undulations of the guide zone form, with the planar ends of the heat exchange plates, channels for the circulation of fluids of constant section and oriented towards the corresponding circuits,
  • the low circulation zone includes pins for maintaining the spacing with the flat ends of the associated heat exchange plates,
  • the transition zone comprises longitudinally discontinuous undulations forming passages between the guide zone and the light circulation zone,
  • the plates provided with reliefs comprise at their longitudinal edges fixing and spacing shims with the planar ends of the heat exchange plates,
  • each assembly, formed by the ends of the heat exchange plates, the plates provided with reliefs and the shims, is secured in a sealed manner with the longitudinal edges of the plates forming the transfer and exchange zone by the means of connection of these plates.

Les caractéristiques et avantages de l'invention apparaîtront au cours de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue schématique en perspective partiellement arrachée d'un faisceau de plaques selon l'invention,
  • la figure 2 est une vue en plan d'une extrémité du faisceau de plaques selon l'invention,
  • la figure 3 est une demi-vue en coupe selon la ligne 3.3 de la figure 2,
  • la figure 4 est une vue de dessus d'un exemple d'une plaque munie de reliefs, d'une entrée ou d'une sortie du faisceau de plaques selon l'invention.
The characteristics and advantages of the invention will appear during the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • FIG. 1 is a schematic perspective view partially cut away of a bundle of plates according to the invention,
  • FIG. 2 is a plan view of one end of the bundle of plates according to the invention,
  • FIG. 3 is a half-view in section along the line 3.3 of FIG. 2,
  • Figure 4 is a top view of an example of a plate provided with reliefs, an inlet or an outlet of the bundle of plates according to the invention.

Comme représenté schématiquement à la figure 1, le faisceau de plaques pour échangeur thermique se compose de trois parties, une partie centrale A et deux parties d'extrémités, respectivement B et C.As shown schematically in Figure 1, the bundle of plates for heat exchanger consists of three parts, a central part A and two end parts, respectively B and C.

La partie centrale A qui constitue la zone de transfert et d'échange thermique proprement dite se compose d'un empilement de plaques 10 parallèles les unes aux autres.The central part A which constitutes the actual transfer and heat exchange zone consists of a stack of plates 10 parallel to each other.

Chaque plaque 10 est constituée d'une tôle fine, le plus souvent en acier inoxydable, ou tout autre matériau suffisamment ductile et comporte, de manière classique, des bords longitudinaux et transversaux à surface lisse et, entre ces bords, des ondulations 11.Each plate 10 consists of a thin sheet, most often made of stainless steel, or any other sufficiently ductile material and comprises, in a conventional manner, longitudinal and transverse edges with a smooth surface and, between these edges, corrugations 11.

Les plaques 10 déterminent entre elles un double circuit de circulation de deux fluides indépendants. Les fluides d'échange thermique circulent longitudinalement d'une extrémité à l'autre du faisceau et à contre-courant.The plates 10 determine between them a double circulation circuit of two independent fluids. The heat exchange fluids circulate longitudinally from one end to the other of the bundle and against the current.

Selon un mode préférentiel de réalisation, les plaques 10 sont assemblées les unes avec les autres au niveau de leurs bords longitudinaux par des moyens de liaison constitués par exemple par des barrettes 12 s'étendant sur toute la longueur des bords longitudinaux desdites plaques 10 et par une couche de soudure 13 déposée sur toute la longueur et sur toute la hauteur de chaque surface latérale du faisceau pour former un mur de soudure étanche.According to a preferred embodiment, the plates 10 are assembled with each other at their longitudinal edges by connecting means constituted for example by bars 12 extending over the entire length of the longitudinal edges of said plates 10 and by a layer of solder 13 deposited over the entire length and over the entire height of each lateral surface of the bundle to form a sealed weld wall.

L'empilement de plaques 10 est placé entre une tôle supérieure 14 et une tôle inférieure 15 s'étendant sur toute la surface des plaques 10 et dont les pourtours sont reliés aux bords desdites plaques 10 par les couches de soudure 13.The stack of plates 10 is placed between an upper plate 14 and a lower plate 15 extending over the entire surface of the plates 10 and the edges of which are connected to the edges of said plates 10 by the layers of solder 13.

Pour diriger les fluides qui circulent à contre-courant dans la partie centrale A d'une extrémité à l'autre du faisceau dans les circuits correspondants, ce faisceau comporte à chacune de ses extrémités, une zone d'entrées et de sorties desdits fluides qui constituent les parties d'extrémités B et C dudit faisceau.To direct the fluids which flow against the current in the central part A from one end to the other of the beam in the corresponding circuits, this beam comprises at each of its ends, an inlet and outlet zone for said fluids which constitute the end portions B and C of said bundle.

Comme représentées sur les figures 2 et 3, ces zones d'entrées et de sorties des fluides sont formées par un empilement des extrémités planes 10a des plaques 10 d'échange thermique entre lesquelles sont insérées des plaques 21 munies de reliefs, ces plaques 10 constituant la zone de transfert et d'échange thermique entre les fluides.As shown in FIGS. 2 and 3, these fluid inlet and outlet zones are formed by a stack of the planar ends 10a of the heat exchange plates 10 between which are inserted plates 21 provided with reliefs, these plates 10 constituting the transfer and heat exchange zone between the fluids.

L'ensemble des extrémités planes 10a des plaques 10 d'échange thermique et des plaques 21 munies de reliefs déterminent à chaque extrémité du faisceau et au niveau de chaque circuit de la zone centrale A, au moins une entrée (a) de l'un des fluides et au moins une sortie (b) de l'autre desdits fluides.All of the planar ends 10a of the heat exchange plates 10 and of the plates 21 provided with reliefs determine at each end of the bundle and at each circuit of the central zone A, at least one entry (a) of one fluids and at least one outlet (b) from the other of said fluids.

La répartition des entrées (a) et des sorties (b) à chaque extrémité du faisceau est fonction des caractéristiques des fluides et de l'échange thermique à obtenir entre ces fluides.The distribution of inputs (a) and outputs (b) at each end of the bundle is a function of the characteristics of the fluids and the heat exchange to be obtained between these fluids.

Selon un exemple de réalisation représenté à la figure 2, les entrées et les sorties comprennent au niveau supérieur du faisceau une entrée (a) pour l'un des fluides, au niveau situé au-dessous, deux sorties (b) pour l'autre desdits fluides et ainsi de suite jusqu'au niveau inférieur de ce faisceau.According to an exemplary embodiment shown in Figure 2, the inputs and outputs include at upper level of the beam an inlet (a) for one of the fluids, at the level below, two outlets (b) for the other of said fluids and so on to the lower level of this beam.

Ainsi que représentées aux figures 2 et 3, les plaques 21 munies de reliefs comportent au niveau de leurs bords longitudinaux des cales 22 de fixation et d'écartement avec les extrémités planes 10a des plaques d'échange thermique 10.As shown in FIGS. 2 and 3, the plates 21 provided with reliefs comprise at their longitudinal edges wedges 22 for fixing and spacing with the planar ends 10a of the heat exchange plates 10.

Chaque bord longitudinal des plaques 21 munies de reliefs est fixé sur une cale 22 par exemple par un cordon de soudure 23.Each longitudinal edge of the plates 21 provided with reliefs is fixed on a wedge 22 for example by a weld bead 23.

Chaque ensemble, formé par les extrémités planes 10a des plaques 10 d'échange thermique, les plaques 21 munies de reliefs et les cales 22, est solidarisé de manière étanche avec les bords longitudinaux des plaques 10 formant la zone A de transfert et d'échange par les moyens de liaison de ces plaques 10, c'est-à-dire par les murs de soudure 13.Each assembly, formed by the flat ends 10a of the heat exchange plates 10, the plates 21 provided with reliefs and the shims 22, is secured in a sealed manner with the longitudinal edges of the plates 10 forming the zone A for transfer and exchange by the connecting means of these plates 10, that is to say by the welding walls 13.

Les portions situées, soit de part et d'autre des entrées (a), soit entre les sorties (b), sont fermées par des cales 24, comme représentées aux figures 2 et 3.The portions located either on either side of the inlets (a) or between the outlets (b) are closed by wedges 24, as shown in FIGS. 2 and 3.

D'une manière générale, chaque plaque 21 munie de reliefs comporte au moins une zone de guidage de l'un des fluides vers le circuit correspondant et une zone de faible circulation de ce fluide, séparée de la zone de guidage par au moins une zone de transition permettant le passage dudit fluide entre ces deux zones.In general, each plate 21 provided with reliefs comprises at least one zone for guiding one of the fluids towards the corresponding circuit and a zone of low circulation of this fluid, separated from the guide zone by at least one zone transition allowing the passage of said fluid between these two zones.

En se rapportant à la figure 4, on va maintenant décrire un exemple de réalisation d'une plaque 21 munie de reliefs.Referring to Figure 4, we will now describe an embodiment of a plate 21 provided with reliefs.

Ainsi, la plaque 21 munie de reliefs comporte une zone 21a de guidage de l'un des fluides vers le circuit correspondant et une zone 21b de faible circulation de ce fluide, séparée de la zone 21a de guidage par au moins une zone 21c de transition permettant le passage dudit fluide entre ces deux zones 21a et 21b.Thus, the plate 21 provided with reliefs includes a zone 21a for guiding one of the fluids towards the corresponding circuit and a zone 21b for low circulation of this fluid, separated from the zone 21a for guiding by at least one transition zone 21c allowing the passage of said fluid between these two zones 21a and 21b.

La zone de guidage 21a de la plaque 21 comporte des ondulations continues 210a qui forment avec les extrémités planes 10a des plaques 10 d'échange thermique des canaux de circulation du fluide correspondant de section constante et orientés vers le circuit dans lequel circule ce fluide.The guide zone 21a of the plate 21 comprises continuous corrugations 210a which form with the planar ends 10a of the heat exchange plates 10 circulation channels of the corresponding fluid of constant section and oriented towards the circuit in which this fluid circulates.

La zone 21b de faible circulation de la plaque 21 comporte des picots 210b de maintien de l'écartement avec les extrémités planes 10a des plaques 10 d'échange thermique associées.The zone 21b of low circulation of the plate 21 comprises pins 210b for maintaining the spacing with the planar ends 10a of the associated heat exchange plates 10.

La zone 21c de transition comporte des ondulations 210c discontinues longitudinalement formant des passages 211c entre la zone 21a de guidage et la zone 21b de faible circulation.The transition zone 21c comprises longitudinally discontinuous corrugations 210c forming passages 211c between the guide zone 21a and the low circulation zone 21b.

La zone 21c de transition assure le passage d'une faible quantité de fluide de la zone 21a de guidage vers la zone 21b de faible circulation de telle sorte que cette dernière soit baignée par une petite quantité de fluide et qu'ainsi une totale stagnation de ce fluide soit évitée dans cette zone.The transition zone 21c ensures the passage of a small quantity of fluid from the guiding zone 21a towards the zone 21b of low circulation so that the latter is bathed by a small quantity of fluid and thus thus a total stagnation of this fluid is avoided in this area.

Le faisceau de plaques, selon l'invention possède donc, au niveau de chacune de ses extrémités, des zones d'entrées et de sorties formées par les extrémités planes des plaques d'échange thermique entre lesquelles sont insérées des plaques indépendantes et munies de reliefs qui forment des passages de fluides de section constante ce qui permet d'obtenir un écoulement uniforme des fluides améliorant ainsi le rendement du faisceau de plaques.The bundle of plates according to the invention therefore has, at each of its ends, inlet and outlet zones formed by the planar ends of the heat exchange plates between which are inserted independent plates and provided with reliefs which form fluid passages of constant section which allows a uniform flow of fluids to be obtained, thereby improving the efficiency of the plate bundle.

Claims (9)

Faisceau de plaques pour un échangeur thermique, du type comprenant un empilement de plaques (10) d'échange thermique métalliques, parallèles les unes aux autres et comportant chacune des bords à surface lisse et une partie centrale munie d'ondulations (11) pour former avec les plaques (10) d'échange thermique associées un double circuit de circulation de deux fluides indépendants et à contre-courant, les plaques (10) étant reliées les unes aux autres au niveau de leurs bords longitudinaux par des moyens de liaison (13) et comprenant, d'une part, une zone de transfert et d'échange thermique entre les fluides et, d'autre part, au niveau de leurs extrémités libres, une zone d'entrées et de sorties desdits fluides, caractérisé en ce que les zones d'entrées et de sorties des fluides sont formées par les extrémités (10a) planes des plaques (10) d'échange thermique entre lesquelles sont insérées des plaques (21) indépendantes et munies de reliefs pour assurer la distribution des fluides dans la zone d'échange thermique.Bundle of plates for a heat exchanger, of the type comprising a stack of metal heat exchange plates (10), parallel to each other and each having edges with a smooth surface and a central part provided with corrugations (11) to form with the heat exchange plates (10) associated with a double circulation circuit of two independent and counter-current fluids, the plates (10) being connected to each other at their longitudinal edges by connecting means (13 ) and comprising, on the one hand, a heat transfer and exchange zone between the fluids and, on the other hand, at their free ends, an inlet and outlet area for said fluids, characterized in that the fluid inlet and outlet zones are formed by the flat ends (10a) of the heat exchange plates (10) between which are inserted independent plates (21) provided with reliefs to ensure the dist ribution of fluids in the heat exchange zone. Faisceau de plaques selon la revendication 1, caractérisé en ce que l'ensemble des extrémités (10a) des plaques d'échange thermique et des plaques (21) munies de relief détermine au niveau de chaque extrémité du faisceau une superposition d'au moins une entrée (a) de l'un des fluides et d'au moins une sortie (b) de l'autre extrémité desdits fluides.Plate bundle according to claim 1, characterized in that the set of ends (10a) of the heat exchange plates and plates (21) provided with relief determines at each end of the bundle a superposition of at least one inlet (a) of one of the fluids and at least one outlet (b) of the other end of said fluids. Faisceau de plaques selon les revendications 1 et 2, caractérisé en ce que chaque plaque (21) munie de reliefs comporte au moins une zone (21a) de guidage de l'un des fluides vers le circuit correspondant et une zone (21b) de faible circulation de ce fluide séparée de la zone (21a) de guidage par au moins une zone (21c) de transition permettant le passage dudit fluide entre ces deux zones (21a,21b).Bundle of plates according to claims 1 and 2, characterized in that each plate (21) provided with reliefs comprises at least one zone (21a) for guiding one of the fluids towards the corresponding circuit and a zone (21b) of low circulation of this fluid separated from the guiding zone (21a) by at least one transition zone (21c) allowing the passage of said fluid between these two zones (21a, 21b). Faisceau de plaques selon la revendication 3, caractérisé en ce que la zone (21a) de guidage comporte des ondulations continues (210a).Plate bundle according to claim 3, characterized in that the guide zone (21a) has continuous undulations (210a). Faisceau de plaques selon l'une quelconque des revendications précédentes, caractérisé en ce que les ondulations continues (210a) de la zone (21a) de guidage forment avec les extrémités (10a) des plaques (10) d'échange thermique des canaux de circulation des fluides de section constante et orientés vers les circuits correspondants.Plate bundle according to any one of the preceding claims, characterized in that the continuous undulations (210a) of the guide zone (21a) form, with the ends (10a), heat exchange plates (10) of the circulation channels fluids of constant section and oriented towards the corresponding circuits. Faisceau de plaques selon la revendication 3, caractérisé en ce que la zone (21b) de faible circulation comporte des picots (210b) de maintien de l'écartement avec les extrémités (10a) planes des plaques (10) d'échange thermiques associées.Bundle of plates according to claim 3, characterized in that the zone (21b) of low circulation comprises pins (210b) for maintaining the spacing with the planar ends (10a) of the plates (10) associated heat exchange. Faisceau de plaques selon la revendication 3, caractérisé en ce que la zone (21c) de transition comporte des ondulations discontinues (210c) longitudinalement formant des passages (211c) entre la zone (21a) de guidage et la zone (21b) de faible circulation.Plate bundle according to claim 3, characterized in that the transition zone (21c) comprises discontinuous undulations (210c) longitudinally forming passages (211c) between the guide zone (21a) and the low circulation zone (21b) . Faisceau de plaques selon l'une quelconque des revendications précédentes, caractérisé en ce que les plaques (21) munies de reliefs comporte au niveau de leurs bords longitudinaux des cales (22) de fixation et d'écartement avec les extrémités (10a) planes des plaques (10) d'échange thermique.Bundle of plates according to any one of the preceding claims, characterized in that the plates (21) provided with reliefs comprises at their longitudinal edges wedges (22) for fixing and spacing with the planar ends (10a) of the heat exchange plates (10). Faisceau de plaques selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque ensemble formé par les extrémités (10a) planes des plaques (10) d'échange thermique, les plaques (21) munies de reliefs et les cales (22) est solidarisé de manière étanche avec les bords longitudinaux des plaques (10) formant la zone de transfert et d'échange par les moyens (13) de liaison de ces plaques (10).Plate bundle according to any one of the preceding claims, characterized in that each assembly formed by the flat ends (10a) of the heat exchange plates (10), the plates (21) provided with reliefs and the shims (22) is secured in a sealed manner with the longitudinal edges of the plates (10) forming the transfer and exchange zone by the means (13) connecting these plates (10).
EP95402548A 1994-11-28 1995-11-14 Stack of plates for a heat exchanger Expired - Lifetime EP0715144B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414231A FR2727505A1 (en) 1994-11-28 1994-11-28 PLATE HARNESS FOR A HEAT EXCHANGER
FR9414231 1994-11-28

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EP0715144A1 true EP0715144A1 (en) 1996-06-05
EP0715144B1 EP0715144B1 (en) 1999-04-07

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EP (1) EP0715144B1 (en)
JP (1) JP3691136B2 (en)
DE (1) DE69508892T2 (en)
FR (1) FR2727505A1 (en)

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Also Published As

Publication number Publication date
JPH08219677A (en) 1996-08-30
JP3691136B2 (en) 2005-08-31
US5584341A (en) 1996-12-17
DE69508892D1 (en) 1999-05-12
FR2727505A1 (en) 1996-05-31
DE69508892T2 (en) 1999-08-12
EP0715144B1 (en) 1999-04-07
FR2727505B1 (en) 1997-02-14

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