EP3577407B1 - Heat-exchange plate for plate-type heat exchanger and corresponding plate-type heat exchanger - Google Patents

Heat-exchange plate for plate-type heat exchanger and corresponding plate-type heat exchanger Download PDF

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Publication number
EP3577407B1
EP3577407B1 EP18705698.1A EP18705698A EP3577407B1 EP 3577407 B1 EP3577407 B1 EP 3577407B1 EP 18705698 A EP18705698 A EP 18705698A EP 3577407 B1 EP3577407 B1 EP 3577407B1
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EP
European Patent Office
Prior art keywords
patterns
plate
face
heat exchanger
exchange
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EP18705698.1A
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German (de)
French (fr)
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EP3577407A1 (en
Inventor
Kamel Azzouz
Issiaka Traore
Michael LISSNER
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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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
    • 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
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels

Definitions

  • the invention relates to a plate heat exchanger comprising exchange plates
  • a heat exchanger according to the preamble of claim 1 is disclosed in the document DE 196 28 009 .
  • plate heat exchangers comprise a stack of exchange plates comprising corrugations. These corrugations allow, within the stack, the formation of separate heat transfer fluid circulation circuits between fluid inlets and outlets.
  • the corrugations of the exchange plates are generally regular, which in particular allows the formation of a first and a second symmetrical fluid circulation circuit of the same volume. This symmetry of the two fluid circulation circuits may not be optimal in terms of heat exchange, in particular when the two fluids are different and circulate at different flow rates.
  • One of the aims of the present invention is therefore to remedy, at least partially, the drawbacks of the prior art and to propose an improved heat exchanger plate as well as the corresponding heat exchanger.
  • the present invention therefore relates to a plate heat exchanger according to claim 1.
  • the patterns are contiguous and extend along two mutually perpendicular axes, makes it possible to limit the surface area of the contact zone between the exchange plates and thus increases the surface area of the zone where the two heat transfer fluids can exchange heat with each other.
  • the patterns have the shape of an ellipsoid portion, the large diameter of which is parallel to the plane of the exchange plate, so as to form a hollow on the first face and a bump on the second face of the plate. exchange.
  • the ellipsoid of the portions of ellipsoids is a flattened ellipsoid.
  • the ellipsoid portions are half-ellipsoids truncated on four sides perpendicular to each other and perpendicular to the plane of the exchange plate.
  • the four truncated sides of the patterns are of the same length.
  • the patterns in ellipsoid portion comprise on their periphery a half-groove on the second face of the exchange plate so as to form a groove for the circulation of a second heat transfer fluid between two patterns, said groove forming a stop on the first face of the exchange plate, said groove having a section of semi-elliptical shape.
  • the major diameter of the ellipsoid portion of the patterns is greater than the width of the groove.
  • the contact points between the exchange plates on their first faces are made at the level of the junctions of the corners of the patterns so that the patterns form cushion reliefs.
  • the second faces of the exchange plates are in contact with each other at the level of the vertices of the patterns so as to form a second circulation circuit for a second heat transfer fluid between said exchange plates.
  • the stack of exchange plates is arranged between two flat termination plates.
  • the hydraulic diameter ratio between the first fluid circulation circuit and the second fluid circulation circuit is between 1 and 3.
  • first element or second element as well as first parameter and second parameter or even first criterion and second criterion, etc.
  • it is a simple indexing to differentiate and name elements or parameters or criteria that are close but not identical.
  • This indexing does not imply a priority of one element, parameter or criterion with respect to another and it is easy to interchange such denominations without departing from the scope of the present description.
  • This indexing does not imply an order in time either, for example to assess such and such criteria.
  • the circulation of the first and second heat transfer fluids takes place in particular between a fluid inlet 2a and a fluid outlet 2b. As shown in figure 1 , the circulation within the first A and second B fluid circulation circuits can in particular be countercurrent to maximize the heat exchange between the first and second heat transfer fluids.
  • the corrugations 3 comprise periodic patterns 20 of contiguous reliefs.
  • the periodicity between the patterns 20 is produced along two axes X, Y perpendicular to each other.
  • the patterns 20 are contiguous and extend along two axes X, Y perpendicular to each other, makes it possible to limit the area of the contact zone between the exchange plates 10 and thus increases the area of the area where the two heat transfer fluids can exchange heat with each other.
  • Such an exchange plate 10 is generally made of metal and the patterns 20 of the corrugations 3 are obtained by stamping.
  • the patterns 20 can have the shape of an ellipsoid portion whose large diameter D20 (visible on the figure 6 ) is parallel to the plane of the exchange plate 10.
  • This ellipsoid portion configuration of the patterns 20 means that the first face 10a of the exchange plate 10 has a hollow for each pattern 20 and that the second face 10b has one bump for each pattern 20.
  • the ellipsoid of the portions of ellipsoids can in particular be a flattened ellipsoid, that is to say that its small diameter d20 (visible on the figure 6 ) is its diameter of revolution.
  • the ellipsoid portions can be half-ellipsoids truncated on four mutually perpendicular sides and perpendicular to the plane of the exchange plate 10. More particularly, the four truncated sides of the patterns 20 are of the same length, which means that the patterns 20 have a square shape when the exchange plate 10 is viewed from a point of view perpendicular to its XY plane.
  • the contact points 25 between these exchange plates 10 on their first faces 10a are made at the junctions of the corners of the patterns 20.
  • the patterns 20 form cushion reliefs. These pads are open on their four sides due to the truncations and form the first circulation circuit A of the first heat transfer fluid.
  • the first heat transfer fluid can thus circulate from one pattern 20 to another both along the X axis and along the Y axis due to the truncations.
  • the exchange plates 10 when two exchange plates 10 are joined together with their second faces 10a facing each other, the exchange plates 10 are in contact with each other at the tops of the patterns 20. Due to the shape of an ellipsoid portion, the exchange plates 10 form the second circulation circuit B of the second heat transfer fluid.
  • the second heat transfer fluid can thus circulate from one pattern 20 to another both along the X axis and along the Y axis due to the shape in the form of an ellipsoid portion.
  • this contact is made at the level of the vertices of the patterns 20, which have in particular a shape in the form of an ellipsoid portion, makes it possible to limit the surface on which the first heat transfer fluid circulating between two exchange plates 10 is in contact with the first heat transfer fluid circulating between two other exchange plates 10.
  • this ellipsoid portion shape of the patterns 20 makes it possible to have first A and second B asymmetrical circulation circuits, that is to say whose hydraulic diameter is different. This is particularly advantageous when the first and second heat transfer fluids are of different natures and/or circulate at different flow rates.
  • the patterns 20 in ellipsoid portion can also comprise on their periphery a half-groove on the second face 10b of the exchange plate 10 so as to form a groove 27 for the circulation of a second heat transfer fluid between two patterns 20
  • the groove 27 forms an edge on the first face 10a of the exchange plate 10.
  • the groove 27 may also have a section of semi-elliptical shape and therefore have a first diameter D27 and a second diameter d27.
  • the second diameter d27 of the groove 27 corresponds to its width, that is to say that the second diameter d27 of the groove 27 is parallel to the large diameter D20 of the ellipsoid portion of the pattern 20.
  • the second diameter d27 corresponds more exactly to the minor diameter of the ellipse.
  • the first diameter D27 is greater than the second diameter d27.
  • the second diameter d27 corresponds to the large diameter of the ellipse.
  • the first diameter D27 will be less than the second diameter d27.
  • the large diameter D20 of the ellipsoid portion of the patterns 20 is preferably greater than the width of the groove 27.
  • each pattern 20 and therefore the groove 27 follows the edge of the ellipsoid portion of the patterns 20.
  • the hydraulic diameter ratio between the first fluid circulation circuit A and the second fluid circulation circuit B is between 1 and 3.
  • the figure 7 shows in particular a graph of the evolution of the hydraulic diameter ratio between the first fluid circulation circuit A and the second fluid circulation circuit B as a function of the major diameter D20 of the ellipsoid portion of the patterns 20 and of the second diameter d27 of the groove 27, or its width.
  • the first diameter D27 of the groove 27 and the minor diameter d20 of the ellipsoid portion are 1 mm.
  • the large diameter D20 of the ellipsoid portion of the patterns 20 can thus for example vary between 1 and 5 mm while the second diameter d27 of the groove 27 can itself for example vary between 1 and 4 mm.
  • the figures 8a and 8b show schematic sectional representations of a heat exchanger 1 at different locations.
  • the stack of plates forming the heat exchanger 1 here comprises four exchange plates 10 as well as two flat plates 11 of termination.
  • the stack of exchange plates 10 is placed between the two flat end plates 11 .
  • the flat plates 11 face the first faces 10a of the extremal exchange plates 10.
  • the figure 8a is a section made along one of the X or Y axes on the plane formed by the small diameters d20 of the ellipsoid portions of the patterns 20 (just like the section of the figure 5 ).
  • the vertices of the ellipsoid portions of the patterns 20 are in contact with each other.
  • the edges of the grooves 27 are not in contact with each other due to the ellipsoid portion shape of the patterns 20.
  • the figure 8b is a section made along one of the X or Y axes on the plane formed by the contact points 25 between the exchange plates 10 on their first faces 10a (in the same way as the section of the figures 2, 3 and 4 ).
  • the edges of the grooves 27 are in contact with each other.
  • the vertices of the ellipsoid portions of the patterns 20 are not in contact with each other due to the ellipsoid portion shape of the patterns 20.
  • the plate heat exchanger comprising the exchange plate 10 according to the invention makes it possible, due to its particular shape, to reduce the surface area of the contact zones where a heat transfer fluid is in thermal contact with the same fluid. heat transfer fluid circulating between two other exchange plates 10. Because this area is reduced, the contact surface between two separate heat transfer fluids is increased, which improves the performance of the heat exchanger 1.

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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)

Description

L'invention concerne un échangeur de chaleur à plaques comportant des plaques d'échange Un tel échangeur de chaleur selon le préambule de la revendication 1 est divulgué dans le document DE 196 28 009 .The invention relates to a plate heat exchanger comprising exchange plates Such a heat exchanger according to the preamble of claim 1 is disclosed in the document DE 196 28 009 .

De manière générale, les échangeurs de chaleur à plaques comportent un empilement de plaques d'échange comportant des corrugations. Ces corrugations permettent, au sein de l'empilement, la formation de circuits de circulation de fluides caloporteurs distincts entre des entrées et des sorties de fluides. Les corrugations des plaques d'échanges sont généralement régulières ce qui permet notamment la formation d'un premier et d'un deuxième circuit de circulation de fluide symétriques et de même volume. Cette symétrie des deux circuits de circulation de fluides peut ne pas être optimal au niveau des échanges de chaleurs, notamment lorsque les deux fluides sont différents et circulent à des débits différents.In general, plate heat exchangers comprise a stack of exchange plates comprising corrugations. These corrugations allow, within the stack, the formation of separate heat transfer fluid circulation circuits between fluid inlets and outlets. The corrugations of the exchange plates are generally regular, which in particular allows the formation of a first and a second symmetrical fluid circulation circuit of the same volume. This symmetry of the two fluid circulation circuits may not be optimal in terms of heat exchange, in particular when the two fluids are different and circulate at different flow rates.

Une solution connue pour répondre à ce problème technique est de proposer des circuits de circulation de fluides asymétriques. Une telle solution est décrite dans le document US6237679B1 où les plaques d'échanges sont sinusoïdales avec des méplats entre chaque sinusoïde et sur lesquels le contact entre deux plaques d'échange est effectué. Cependant cette solution n'est pas optimale car au niveau de ces méplats, la surface sur laquelle un fluide caloporteur est en contact thermique avec le même fluide caloporteur mais circulant de l'autre côté des deux plaques d'échange est importante. Cela diminue l'efficacité thermique de l'échangeur de chaleur.A known solution for responding to this technical problem is to provide asymmetrical fluid circulation circuits. Such a solution is described in the document US6237679B1 where the exchange plates are sinusoidal with flats between each sinusoid and on which the contact between two exchange plates is made. However, this solution is not optimal because at these flats, the surface on which a heat transfer fluid is in thermal contact with the same heat transfer fluid but circulating on the other side of the two exchange plates is large. This decreases the thermal efficiency of the heat exchanger.

Un des buts de la présente invention est donc de remédier au moins partiellement aux inconvénients de l'art antérieur et de proposer une plaque d'échange améliorée ainsi que l'échangeur de chaleur correspondant.One of the aims of the present invention is therefore to remedy, at least partially, the drawbacks of the prior art and to propose an improved heat exchanger plate as well as the corresponding heat exchanger.

La présente invention concerne donc un échangeur de chaleur à plaques selon la revendication 1.The present invention therefore relates to a plate heat exchanger according to claim 1.

Le fait que les motifs soient contigus et s'étendent selon deux axes perpendiculaires l'un de l'autre, permet de limiter la superficie de la zone de contact entre les plaques d'échange et ainsi augmente la superficie de la zone où les deux fluides caloporteurs peuvent échanger de la chaleur l'un avec l'autre.The fact that the patterns are contiguous and extend along two mutually perpendicular axes, makes it possible to limit the surface area of the contact zone between the exchange plates and thus increases the surface area of the zone where the two heat transfer fluids can exchange heat with each other.

Selon l'invention, les motifs ont une forme de portion d'ellipsoïde dont le grand diamètre est parallèle au plan de la plaque d'échange, de sorte à former un creux sur la première face et une bosse sur la deuxième face de la plaque d'échange.According to the invention, the patterns have the shape of an ellipsoid portion, the large diameter of which is parallel to the plane of the exchange plate, so as to form a hollow on the first face and a bump on the second face of the plate. exchange.

Selon un autre aspect de l'invention, l'ellipsoïde des portions d'ellipsoïdes est un ellipsoïde aplati.According to another aspect of the invention, the ellipsoid of the portions of ellipsoids is a flattened ellipsoid.

Selon l'invention, les portions d'ellipsoïde sont des demi-ellipsoïdes tronqués sur quatre cotés perpendiculaires entre eux et perpendiculairement au plan de la plaque d'échange.According to the invention, the ellipsoid portions are half-ellipsoids truncated on four sides perpendicular to each other and perpendicular to the plane of the exchange plate.

Selon un autre aspect de l'invention, les quatre côtés tronqués des motifs sont de même longueur.According to another aspect of the invention, the four truncated sides of the patterns are of the same length.

Selon un autre aspect de l'invention, les motifs en portion d'ellipsoïde comprennent sur leur périphérie une demi-gorge sur la deuxième face de la plaque d'échange de sorte à former une gorge de circulation d'un deuxième fluide caloporteur entre deux motifs, ladite gorge formant une arrête sur la première face de la plaque d'échange, ladite gorge ayant une section de forme semi-elliptique.According to another aspect of the invention, the patterns in ellipsoid portion comprise on their periphery a half-groove on the second face of the exchange plate so as to form a groove for the circulation of a second heat transfer fluid between two patterns, said groove forming a stop on the first face of the exchange plate, said groove having a section of semi-elliptical shape.

Selon un autre aspect de l'invention, le grand diamètre de la portion d'ellipsoïde des motifs est supérieur à la largeur de la gorge.According to another aspect of the invention, the major diameter of the ellipsoid portion of the patterns is greater than the width of the groove.

Selon un aspect de l'échangeur selon l'invention, les points de contacts entre les plaques d'échanges sur leurs premières faces sont réalisés au niveau des jonctions des coins des motifs de sorte que les motifs forment des reliefs en coussinet.According to one aspect of the exchanger according to the invention, the contact points between the exchange plates on their first faces are made at the level of the junctions of the corners of the patterns so that the patterns form cushion reliefs.

Selon un autre aspect de l'échangeur selon l'invention, les deuxièmes faces des plaques d'échange sont en contact les unes des autres au niveau des sommets des motifs de sorte à former un deuxième circuit de circulation d'un deuxième fluide caloporteur entre lesdites plaques d'échanges.According to another aspect of the exchanger according to the invention, the second faces of the exchange plates are in contact with each other at the level of the vertices of the patterns so as to form a second circulation circuit for a second heat transfer fluid between said exchange plates.

Selon un aspect de l'échangeur selon l'invention, l'empilement de plaques d'échange est disposé entre deux plaques planes de terminaison.According to one aspect of the exchanger according to the invention, the stack of exchange plates is arranged between two flat termination plates.

Selon un aspect de l'échangeur selon l'invention, le ratio de diamètre hydraulique entre le premier circuit de circulation de fluide et le deuxième circuit de circulation de fluide est compris entre 1 et 3.According to one aspect of the exchanger according to the invention, the hydraulic diameter ratio between the first fluid circulation circuit and the second fluid circulation circuit is between 1 and 3.

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante, donnée à titre d'exemple illustratif et non limitatif, et des dessins annexés parmi lesquels :

  • la figure 1 montre une représentation schématique en vue de dessus d'un empilement de deux plaques d'échange,
  • la figure 2 montre une représentation schématique éclatée et en perspective d'une portion de la zone corruguée de deux plaques d'échange selon un premier mode de réalisation,
  • la figure 3 montre une représentation schématique en perspective d'une portion de la zone corruguée des deux plaques d'échange de la figure 2 jointes,
  • la figure 4 montre une représentation schématique en perspective d'une portion de la zone corruguée de quatre plaques d'échange de la figure 2 jointes,
  • la figure 5 montre une représentation schématique en perspective et en coupe d'une portion de la zone corruguée des quatre plaques d'échange jointes de la figure 4,
  • la figure 6 montre une représentation schématique en coupe d'une portion de la zone corruguée d'une plaque d'échange selon un deuxième mode de réalisation,
  • la figure 7 montre un graphique de l'évolution du ratio du diamètre hydraulique entre un premier et un deuxième circuit de circulation de fluide,
  • les figures 8a et 8b montrent des représentations schématiques en coupe d'une portion de la zone corruguée d'un échangeur de chaleur comportant des plaques d'échange de la figure 6.
Other characteristics and advantages of the invention will appear more clearly on reading the following description, given by way of illustrative and non-limiting example, and the appended drawings, among which:
  • the figure 1 shows a schematic representation in top view of a stack of two exchange plates,
  • the figure 2 shows an exploded schematic representation in perspective of a portion of the corrugated zone of two exchange plates according to a first embodiment,
  • the picture 3 shows a schematic representation in perspective of a portion of the corrugated zone of the two exchange plates of the figure 2 attached,
  • the figure 4 shows a schematic representation in perspective of a portion of the corrugated zone of four exchange plates of the figure 2 attached,
  • the figure 5 shows a schematic representation in perspective and in section of a portion of the corrugated zone of the four joined exchange plates of the figure 4 ,
  • the figure 6 shows a schematic sectional representation of a portion of the corrugated zone of an exchange plate according to a second embodiment,
  • the figure 7 shows a graph of the evolution of the hydraulic diameter ratio between a first and a second fluid circulation circuit,
  • them figures 8a and 8b show cross-sectional schematic representations of a portion of the corrugated zone of a heat exchanger comprising exchange plates of the figure 6 .

Les éléments identiques sur les différentes figures, portent les mêmes références.Identical elements in the various figures bear the same references.

Les réalisations suivantes sont des exemples. Bien que la description se réfère à un ou plusieurs modes de réalisation, ceci ne signifie pas nécessairement que chaque référence concerne le même mode de réalisation, ou que les caractéristiques s'appliquent seulement à un seul mode de réalisation. De simples caractéristiques de différents modes de réalisation peuvent également être combinées ou interchangées pour fournir d'autres réalisations.The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference is to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

Dans la présente description, on peut indexer certains éléments ou paramètres, comme par exemple premier élément ou deuxième élément ainsi que premier paramètre et deuxième paramètre ou encore premier critère et deuxième critère etc. Dans ce cas, il s'agit d'un simple indexage pour différencier et dénommer des éléments ou paramètres ou critères proches mais non identiques. Cette indexation n'implique pas une priorité d'un élément, paramètre ou critère par rapport à un autre et on peut aisément interchanger de telles dénominations sans sortir du cadre de la présente description. Cette indexation n'implique pas non plus un ordre dans le temps par exemple pour apprécier tels ou tels critères.In the present description, it is possible to index certain elements or parameters, such as for example first element or second element as well as first parameter and second parameter or even first criterion and second criterion, etc. In this case, it is a simple indexing to differentiate and name elements or parameters or criteria that are close but not identical. This indexing does not imply a priority of one element, parameter or criterion with respect to another and it is easy to interchange such denominations without departing from the scope of the present description. This indexing does not imply an order in time either, for example to assess such and such criteria.

Comme le montre la figure 1, un échangeur de chaleur à plaques 1 comporte un empilement de plaques d'échange 10. Ces plaques d'échange 10 comportent notamment une zone centrale comportant des corrugations 3. Lorsque les plaques d'échange 10 sont empilées, lesdites corrugations 3 forment :

  • ∘ un premier circuit de circulation de fluide A (visible sur les figures 3 à 5) sur une première face 10a des plaques d'échange 10 et dans lequel un premier fluide caloporteur est destiné à circuler, et
  • ∘ un deuxième circuit de circulation de fluide B (visible sur les figures 4 et 5) sur une deuxième face 10b, opposée à la première face 10a, des plaques d'échange 10 et dans lequel un deuxième fluide caloporteur est destiné à circuler.
As shown in figure 1 , a plate heat exchanger 1 comprises a stack of exchange plates 10. These exchange plates 10 notably comprise a central zone comprising corrugations 3. When the exchange plates 10 are stacked, said corrugations 3 form:
  • ∘ a first fluid circulation circuit A (visible on the figures 3 to 5 ) on a first face 10a of the exchange plates 10 and in which a first heat transfer fluid is intended to circulate, and
  • ∘ a second fluid circulation circuit B (visible on the figures 4 and 5 ) on a second face 10b, opposite the first face 10a, of the exchange plates 10 and in which a second heat transfer fluid is intended to circulate.

La circulation des premier et deuxième fluides caloporteurs s'effectue notamment entre une entrée de fluide 2a et une sortie de fluide 2b. Comme illustré à la figure 1, la circulation au sein des premier A et deuxième B circuits de circulation de fluides peut notamment être à contre-courant pour maximiser les échanges de chaleur entre les premier et deuxième fluides caloporteurs.The circulation of the first and second heat transfer fluids takes place in particular between a fluid inlet 2a and a fluid outlet 2b. As shown in figure 1 , the circulation within the first A and second B fluid circulation circuits can in particular be countercurrent to maximize the heat exchange between the first and second heat transfer fluids.

Comme le montrent notamment les figures 2 et 3, les corrugations 3 comportent des motifs 20 périodiques de reliefs contigus. La périodicité entre les motifs 20 est réalisée selon deux axes X, Y perpendiculaires l'un de l'autre.As shown in particular by the figures 2 and 3 , the corrugations 3 comprise periodic patterns 20 of contiguous reliefs. The periodicity between the patterns 20 is produced along two axes X, Y perpendicular to each other.

Le fait que les motifs 20 soient contigus et s'étendent selon deux axes X, Y perpendiculaires l'un de l'autre, permet de limiter la superficie de la zone de contact entre les plaques d'échange 10 et ainsi augmente la superficie de la zone où les deux fluides caloporteurs peuvent échanger de la chaleur l'un avec l'autre.The fact that the patterns 20 are contiguous and extend along two axes X, Y perpendicular to each other, makes it possible to limit the area of the contact zone between the exchange plates 10 and thus increases the area of the area where the two heat transfer fluids can exchange heat with each other.

Un telle plaque d'échange 10 est généralement réalisée en métal et les motifs 20 des corrugations 3 sont obtenus par emboutissage.Such an exchange plate 10 is generally made of metal and the patterns 20 of the corrugations 3 are obtained by stamping.

Plus particulièrement, les motifs 20 peuvent avoir une forme de portion d'ellipsoïde dont le grand diamètre D20 (visible sur la figure 6) est parallèle au plan de la plaque d'échange 10. Cette configuration en portion d'ellipsoïde des motifs 20 fait que la première face 10a de la plaque d'échange 10 comporte un creux pour chaque motif 20 et que la deuxième face 10b comporte une bosse pour chaque motif 20.More particularly, the patterns 20 can have the shape of an ellipsoid portion whose large diameter D20 (visible on the figure 6 ) is parallel to the plane of the exchange plate 10. This ellipsoid portion configuration of the patterns 20 means that the first face 10a of the exchange plate 10 has a hollow for each pattern 20 and that the second face 10b has one bump for each pattern 20.

L'ellipsoïde des portions d'ellipsoïdes peut notamment être un ellipsoïde aplatie, c'est-à-dire que son petit diamètre d20 (visible sur la figure 6) est son diamètre de révolution.The ellipsoid of the portions of ellipsoids can in particular be a flattened ellipsoid, that is to say that its small diameter d20 (visible on the figure 6 ) is its diameter of revolution.

Comme le montrent les figures 2 à 5, les portions d'ellipsoïde peuvent être des demi-ellipsoïdes tronqués sur quatre cotés perpendiculaires entre eux et perpendiculairement au plan de la plaque d'échange 10. Plus particulièrement, les quatre côtés tronqués des motifs 20 sont de même longueur, ce qui fait que les motifs 20 ont une forme carrée lorsque la plaque d'échange 10 est regardée d'un point de vue perpendiculaire à son plan XY.As shown by the figures 2 to 5 , the ellipsoid portions can be half-ellipsoids truncated on four mutually perpendicular sides and perpendicular to the plane of the exchange plate 10. More particularly, the four truncated sides of the patterns 20 are of the same length, which means that the patterns 20 have a square shape when the exchange plate 10 is viewed from a point of view perpendicular to its XY plane.

Comme le montrent les figures 2 et 3, lorsque deux plaques d'échange 10 sont accolées l'une à l'autre avec leurs premières faces 10a en regard l'une de l'autre, les points de contacts 25 entre ces plaques d'échanges 10 sur leurs premières faces 10a sont réalisés au niveau des jonctions des coins des motifs 20. De cette façon, les motifs 20 forment des reliefs en coussinet. Ces coussinets sont ouverts sur leurs quatre cotés du fait des troncatures et forment le premier circuit de circulation A du premier fluide caloporteur. Le premier fluide caloporteur peut ainsi circuler d'un motif 20 à un autre aussi bien selon l'axe X que selon l'axe Y du fait des troncatures.As shown by the figures 2 and 3 , when two exchange plates 10 are joined together with their first faces 10a facing each other, the contact points 25 between these exchange plates 10 on their first faces 10a are made at the junctions of the corners of the patterns 20. In this way, the patterns 20 form cushion reliefs. These pads are open on their four sides due to the truncations and form the first circulation circuit A of the first heat transfer fluid. The first heat transfer fluid can thus circulate from one pattern 20 to another both along the X axis and along the Y axis due to the truncations.

Comme le montrent les figures 4 et 5, lorsque deux plaques d'échange 10 sont accolées l'une à l'autre avec leurs deuxièmes faces 10a en regard l'une de l'autre, les plaques d'échange 10 sont en contact les unes des autres au niveau des sommets des motifs 20. Du fait de la forme en portion d'ellipsoïde les plaques d'échanges 10 forment le deuxième circuit de circulation B du deuxième fluide caloporteur. Le deuxième fluide caloporteur peut ainsi circuler d'un motif 20 à un autre aussi bien selon l'axe X que selon l'axe Y du fait de la forme en portion d'ellipsoïde. Le fait que ce contact se fait au niveau des sommets des motifs 20, qui ont notamment une forme en portion d'ellipsoïde, permet de limiter la surface sur laquelle le premier fluide caloporteur circulant entre deux plaques d'échange 10 est en contact avec le premier fluide caloporteur circulant entre deux autres plaques d'échange 10.As shown by the figures 4 and 5 , when two exchange plates 10 are joined together with their second faces 10a facing each other, the exchange plates 10 are in contact with each other at the tops of the patterns 20. Due to the shape of an ellipsoid portion, the exchange plates 10 form the second circulation circuit B of the second heat transfer fluid. The second heat transfer fluid can thus circulate from one pattern 20 to another both along the X axis and along the Y axis due to the shape in the form of an ellipsoid portion. The fact that this contact is made at the level of the vertices of the patterns 20, which have in particular a shape in the form of an ellipsoid portion, makes it possible to limit the surface on which the first heat transfer fluid circulating between two exchange plates 10 is in contact with the first heat transfer fluid circulating between two other exchange plates 10.

De plus, cette forme en portion d'ellipsoïde des motifs 20 permet d'avoir des premier A et deuxième B circuit de circulation asymétriques, c'est-à-dire dont le diamètre hydraulique est différent. Cela est particulièrement avantageux lorsque les premier et deuxième fluides caloporteurs sont de nature différentes et/ou circulent à des débits différents.In addition, this ellipsoid portion shape of the patterns 20 makes it possible to have first A and second B asymmetrical circulation circuits, that is to say whose hydraulic diameter is different. This is particularly advantageous when the first and second heat transfer fluids are of different natures and/or circulate at different flow rates.

Selon le type d'échangeur de chaleur et surtout les fluides caloporteurs qui seront amenés à circuler dans les premier A et deuxième B circuit de circulation de fluide, il est possible, en choisissant un grand diamètre D20 des motifs 20 en portion d'ellipsoïde adapté, de définir le diamètre hydraulique des différents circuits afin qu'ils soient optimaux.Depending on the type of heat exchanger and especially the heat transfer fluids which will be caused to circulate in the first A and second B fluid circulation circuit, it is possible, by choosing a large diameter D20 of the patterns 20 in a suitable ellipsoid portion , to define the hydraulic diameter of the various circuits so that they are optimal.

Selon un mode de réalisation particulier, illustré notamment à la figure 6, les motifs 20 en portion d'ellipsoïde peuvent également comprendre sur leur périphérie une demi-gorge sur la deuxième face 10b de la plaque d'échange 10 de sorte à former une gorge 27 de circulation d'un deuxième fluide caloporteur entre deux motifs 20. La gorge 27 forme une arrête sur la première face 10a de la plaque d'échange 10.According to a particular embodiment, illustrated in particular in figure 6 , the patterns 20 in ellipsoid portion can also comprise on their periphery a half-groove on the second face 10b of the exchange plate 10 so as to form a groove 27 for the circulation of a second heat transfer fluid between two patterns 20 The groove 27 forms an edge on the first face 10a of the exchange plate 10.

Comme le montre la figure 6, la gorge 27 peut également avoir une section de forme semi-elliptique et donc comporter un premier diamètre D27 et un deuxième diamètre d27. Le deuxième diamètre d27 de la gorge 27 correspond à sa largeur, c'est à dire que le deuxième diamètre d27 de la gorge 27 est parallèle au grand diamètre D20 de la portion d'ellipsoïde du motif 20.As shown in figure 6 , the groove 27 may also have a section of semi-elliptical shape and therefore have a first diameter D27 and a second diameter d27. The second diameter d27 of the groove 27 corresponds to its width, that is to say that the second diameter d27 of the groove 27 is parallel to the large diameter D20 of the ellipsoid portion of the pattern 20.

Sur la figure 6, le deuxième diamètre d27 correspond plus exactement au petit diamètre de l'ellipse. Dans ce cas, le premier diamètre D27 est supérieur au deuxième diamètre d27. Il est cependant tout à fait possible d'imaginer un cas où le deuxième diamètre d27 correspond au grand diamètre de l'ellipse. Dans ce cas, le premier diamètre D27 sera inférieur au deuxième diamètre d27.On the figure 6 , the second diameter d27 corresponds more exactly to the minor diameter of the ellipse. In this case, the first diameter D27 is greater than the second diameter d27. However, it is quite possible to imagine a case where the second diameter d27 corresponds to the large diameter of the ellipse. In this case, the first diameter D27 will be less than the second diameter d27.

Afin que la gorge 27 soit bien marquée, le grand diamètre D20 de la portion d'ellipsoïde des motifs 20 est de préférence supérieur à la largeur de la gorge 27.So that the groove 27 is well marked, the large diameter D20 of the ellipsoid portion of the patterns 20 is preferably greater than the width of the groove 27.

La demi-gorge de chaque motif 20 et donc la gorge 27 suit le bord de la portion d'ellipsoïde des motifs 20.The half-groove of each pattern 20 and therefore the groove 27 follows the edge of the ellipsoid portion of the patterns 20.

De même que précédemment, selon le type d'échangeur de chaleur 1 et surtout selon les fluides caloporteurs qui seront amenés à circuler dans les premier A et deuxième B circuits de circulation de fluide, il est possible, en choisissant un grand diamètre D20 des motifs 20 en portion d'ellipsoïde et une largeur de la gorge 27 adaptés, de définir le diamètre hydraulique des différents circuits afin qu'ils soient optimaux.As before, depending on the type of heat exchanger 1 and especially depending on the heat transfer fluids which will be caused to circulate in the first A and second B fluid circulation circuits, it is possible, by choosing a large diameter D20 of the patterns 20 in portion of ellipsoid and a width of the groove 27 adapted, to define the hydraulic diameter of the various circuits so that they are optimal.

De préférence, le ratio de diamètre hydraulique entre le premier circuit de circulation de fluide A et le deuxième circuit de circulation de fluide B est compris entre 1 et 3.Preferably, the hydraulic diameter ratio between the first fluid circulation circuit A and the second fluid circulation circuit B is between 1 and 3.

La figure 7 montre notamment un graphique de l'évolution du ratio de diamètre hydraulique entre le premier circuit de circulation de fluide A et le deuxième circuit de circulation de fluide B en fonction du grand diamètre D20 de la portion d'ellipsoïde des motifs 20 et du deuxième diamètre d27 de la gorge 27, soit sa largeur. Sur ce graphique, le premier diamètre D27 de la gorge 27 et le petit diamètre d20 de la portion d'ellipsoïde sont de 1mm. Le grand diamètre D20 de la portion d'ellipsoïde des motifs 20 peut ainsi par exemple varier entre 1 et 5 mm alors que le deuxième diamètre d27 de la gorge 27 peut quant à lui par exemple varier entre 1 et 4 mm.The figure 7 shows in particular a graph of the evolution of the hydraulic diameter ratio between the first fluid circulation circuit A and the second fluid circulation circuit B as a function of the major diameter D20 of the ellipsoid portion of the patterns 20 and of the second diameter d27 of the groove 27, or its width. In this graph, the first diameter D27 of the groove 27 and the minor diameter d20 of the ellipsoid portion are 1 mm. The large diameter D20 of the ellipsoid portion of the patterns 20 can thus for example vary between 1 and 5 mm while the second diameter d27 of the groove 27 can itself for example vary between 1 and 4 mm.

Les figures 8a et 8b montrent des représentations schématiques en coupe d'un échangeur de chaleur 1 à différents endroits. L'empilement de plaques formant l'échangeur de chaleur 1 comporte ici quatre plaques d'échange 10 ainsi que deux plaques planes 11 de terminaison. L'empilement de plaques d'échange 10 est disposé entre les deux plaques planes 11 de terminaison.The figures 8a and 8b show schematic sectional representations of a heat exchanger 1 at different locations. The stack of plates forming the heat exchanger 1 here comprises four exchange plates 10 as well as two flat plates 11 of termination. The stack of exchange plates 10 is placed between the two flat end plates 11 .

Les plaques d'échange 10 sont empilées de sorte que :

  • ∘ les premières faces 10a sont en regard l'une de l'autre afin de former le premier circuit de circulation de fluide A, et
  • ∘ les deuxièmes faces 10b sont en regard l'une de l'autre afin de former le deuxième circuit de circulation de fluide B.
The exchange plates 10 are stacked so that:
  • ∘ the first faces 10a face each other to form the first fluid circulation circuit A, and
  • ∘ the second faces 10b face each other to form the second fluid circulation circuit B.

De plus, aux extrémités de l'empilement des plaques d'échanges 10, les plaques planes 11 sont en regards des premières faces 10a des plaques d'échanges 10 extrémales.In addition, at the ends of the stack of exchange plates 10, the flat plates 11 face the first faces 10a of the extremal exchange plates 10.

La figure 8a est une coupe réalisée selon un des axes X ou Y sur le plan formé par les petits diamètres d20 des portions d'ellipsoïde des motifs 20 (au même titre que la coupe de la figure 5). Sur cette figure 8a, sur les deuxièmes faces 10b des plaques d'échange 10, les sommets des portions d'ellipsoïde des motifs 20 sont en contact les uns des autres. Sur les premières faces 10a, les arrêtes des gorges 27 ne sont pas en contact les unes des autres du fait de la forme en portion d'ellipsoïde des motifs 20.The figure 8a is a section made along one of the X or Y axes on the plane formed by the small diameters d20 of the ellipsoid portions of the patterns 20 (just like the section of the figure 5 ). On this figure 8a , on the second faces 10b of the exchange plates 10, the vertices of the ellipsoid portions of the patterns 20 are in contact with each other. On the first faces 10a, the edges of the grooves 27 are not in contact with each other due to the ellipsoid portion shape of the patterns 20.

La figure 8b est une coupe réalisée selon un des axes X ou Y sur le plan formé par les points de contacts 25 entre les plaques d'échanges 10 sur leurs premières faces 10a (au même titre que la coupe des figures 2, 3 et 4). Sur cette figure 8b, sur les premières faces 10a, les arêtes des gorges 27 sont en contact les unes des autres. Sur les deuxièmes faces 10b des plaques d'échange 10, les sommets des portions d'ellipsoïde des motifs 20 ne sont pas en contact les un des autres du fait de la forme en portion d'ellipsoïde des motifs 20.The figure 8b is a section made along one of the X or Y axes on the plane formed by the contact points 25 between the exchange plates 10 on their first faces 10a (in the same way as the section of the figures 2, 3 and 4 ). On this figure 8b , on the first faces 10a, the edges of the grooves 27 are in contact with each other. On the second faces 10b of the exchange plates 10, the vertices of the ellipsoid portions of the patterns 20 are not in contact with each other due to the ellipsoid portion shape of the patterns 20.

Ainsi, on voit bien que l'échangeur de chaleur à plaques comprenant la plaque d'échange 10 selon l'invention permet de part sa forme particulière de diminuer la superficie des zones de contact où un fluide caloporteur est en contact thermique avec le même fluide caloporteur circulant entre deux autres plaques d'échange 10. Du fait que cette superficie est diminuée, la surface de contact entre deux fluides caloporteurs distincts est augmentée ce qui améliore les performances de l'échangeur de chaleur 1.Thus, it is clear that the plate heat exchanger comprising the exchange plate 10 according to the invention makes it possible, due to its particular shape, to reduce the surface area of the contact zones where a heat transfer fluid is in thermal contact with the same fluid. heat transfer fluid circulating between two other exchange plates 10. Because this area is reduced, the contact surface between two separate heat transfer fluids is increased, which improves the performance of the heat exchanger 1.

Claims (9)

  1. Plate-type heat exchanger (1) comprising a stack of heat-exchange plates (10), said heat-exchange plates (10) comprising corrugations (3) and each having a first face (10a) and a second face (10b), said corrugations (3) forming:
    a first fluid-circulation circuit (A) on said first face (10a) and in which a first heat-transfer fluid is intended to circulate, and
    a second fluid-circulation circuit (B) on said second face (10b) which is opposite to the first face (10a), in which circuit a second heat-transfer fluid is intended to circulate,
    the first faces (10a) of two plates that are linked with one another face one another to form said first fluid circulation circuit (A), and
    the second faces (10b) of two plates that are linked with one another face one another so as to form said second fluid circulation circuit (B) such that said corrugations (3) comprise periodic patterns (20) of contiguous reliefs, the periodicity of the patterns (20) being achieved along two axes (X, Y) perpendicular to one another, characterized in that the patterns (20) have the shape of a portion of an ellipsoid of which the major diameter is parallel to the plane of the exchange plate (10), so as to form a hollow on the first face (10a) and a bump on the second face (10b) of each heat-exchange plate (10), and in that the ellipsoid portions are half-ellipsoids truncated on four mutually perpendicular sides perpendicular to the plane of the exchange plate (10).
  2. Heat exchanger (1) according to the preceding claim, characterized in that the ellipsoid of the ellipsoid portions is a flattened ellipsoid.
  3. Heat exchanger (1) according to Claim 1, characterized in that the four truncated sides of the patterns (20) are the same length.
  4. Heat exchanger (1) according to one of the preceding claims, characterized in that the ellipsoid-portion patterns (20) comprise on their periphery a half-groove on the second face (10b) of each heat-exchange plate (10) so as to form a groove (27) for the circulation of the second heat-transfer fluid between two patterns (20), said groove (27) forming a ridge on the first face (10a) of the heat-exchange plate (10), said groove (27) having a cross section of semi-elliptical shape.
  5. Heat exchanger (1) according to the preceding claim, characterized in that the major diameter (D20) of the ellipsoid portion of the patterns (20) is greater than the width of the groove (27).
  6. Plate-type heat exchanger (1) according to either of Claims 4 and 5, characterized in that points (25) of contact between two exchange plates (10) that are linked with one another on their first faces (10a) are achieved at the junctions of the corners of the patterns (20) so that the patterns (20) form pillow-shaped reliefs.
  7. Plate-type heat exchanger (1) according to any one of the preceding claims, characterized in that the second faces (10b) of two heat-exchange plates (10) that are linked with one another are in contact with one another at the tops of the patterns (20) so as to form said second circuit (B) for the circulation of a second heat-transfer fluid between said exchange plates (1).
  8. Plate-type heat exchanger according to one of the preceding claims, characterized in that the stack of heat-exchange plates (10) is placed between two flat end plates (11).
  9. Plate-type heat exchanger according to one of the preceding claims, characterized in that the ratio of hydraulic diameters between the first fluid-circulation circuit (A) and the second fluid-circulation circuit (B) is comprised between 1 and 3.
EP18705698.1A 2017-01-31 2018-01-31 Heat-exchange plate for plate-type heat exchanger and corresponding plate-type heat exchanger Active EP3577407B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1750799A FR3062470B1 (en) 2017-01-31 2017-01-31 EXCHANGE PLATE FOR PLATE HEAT EXCHANGER AND CORRESPONDING PLATE HEAT EXCHANGER
PCT/FR2018/050223 WO2018142065A1 (en) 2017-01-31 2018-01-31 Heat-exchange plate for plate-type heat exchanger and corresponding plate-type heat exchanger

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Publication Number Publication Date
EP3577407A1 EP3577407A1 (en) 2019-12-11
EP3577407B1 true EP3577407B1 (en) 2022-09-07

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EP (1) EP3577407B1 (en)
FR (1) FR3062470B1 (en)
WO (1) WO2018142065A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470453A (en) * 1982-08-19 1984-09-11 Avco Corporation Primary surface for compact heat exchangers
FR2559575A1 (en) * 1984-02-14 1985-08-16 Gea Ahlborn Gmbh Co Kg Plate heat exchanger
SE458806B (en) * 1987-04-21 1989-05-08 Alfa Laval Thermal Ab PLATE HEAT EXCHANGER WITH DIFFERENT FLOW RESISTANCE FOR MEDIA
FR2705445B1 (en) * 1993-05-18 1995-07-07 Vicarb Sa Plate heat exchanger.
DE19628009A1 (en) * 1996-07-11 1998-01-15 Basf Ag Evaporation of aqueous salt solution formed in fertiliser manufacture
SE518276C2 (en) 1997-12-19 2002-09-17 Swep Int Ab plate heat exchangers
US8833741B2 (en) * 2011-11-07 2014-09-16 Spx Cooling Technologies, Inc. Air-to-air atmospheric exchanger
FR3031583B1 (en) * 2015-01-08 2017-03-03 Cie Ind D'applications Thermiques PLATE FOR HEAT EXCHANGER, METHOD OF MANUFACTURING SUCH PLATE AND HEAT EXCHANGER COMPRISING SUCH PLATE

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WO2018142065A1 (en) 2018-08-09
FR3062470B1 (en) 2020-12-11
EP3577407A1 (en) 2019-12-11
FR3062470A1 (en) 2018-08-03

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