EP3577407A1 - Plaque d'échange pour échangeur de chaleur à plaques et échangeur de chaleur à plaques correspondant - Google Patents
Plaque d'échange pour échangeur de chaleur à plaques et échangeur de chaleur à plaques correspondantInfo
- Publication number
- EP3577407A1 EP3577407A1 EP18705698.1A EP18705698A EP3577407A1 EP 3577407 A1 EP3577407 A1 EP 3577407A1 EP 18705698 A EP18705698 A EP 18705698A EP 3577407 A1 EP3577407 A1 EP 3577407A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- exchange
- patterns
- heat exchanger
- face
- 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
Links
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 an exchange plate for a plate heat exchanger and more particularly to an exchange plate, the stack of which makes it possible to form circulation circuits for heat transfer fluids.
- the present invention also relates to a plate heat exchanger comprising such exchange plates.
- the plate heat exchangers comprise a stack of exchange plates comprising corrugations. These corrugations allow, within the stack, the formation of circuits for circulating separate heat transfer fluids between fluid inlets and outlets.
- the corrugations of the exchange plates are generally regular, which allows in particular the formation of a first and a second fluid circulation circuit symmetrical and the same volume. This symmetry of the two fluid circulation circuits may not be optimal at the level of heat exchange, especially when the two fluids are different and circulate at different flow rates.
- a known solution to this technical problem is to provide asymmetric fluid flow circuits.
- Such a solution is described in US6237679B1 where the exchange plates are sinusoidal with flats between each sinusoid and on which the contact between two exchange plates is made.
- 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 flowing on the other side of the two exchange plates is important. This decreases the thermal efficiency of the heat exchanger.
- An object of the present invention is therefore to at least partially overcome the disadvantages of the prior art and to provide an improved exchange plate and the corresponding heat exchanger.
- the present invention therefore relates to an exchange plate for plate heat exchanger, said exchange plate comprising corrugations so that when said exchange plate is in contact on both sides with another plate, said corrugations form:
- corrugations having periodic patterns of contiguous reliefs, the periodicity between the patterns being made along two axes perpendicular to each other.
- the patterns have an ellipsoid portion shape whose large diameter is parallel to the plane of the exchange plate, so as to form a recess on the first face and a boss on the second face of the exchange plate.
- the ellipsoid of the ellipsoid portions 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 portions of ellipsoid portions comprise on their periphery a half-groove on the second face of the exchange plate so as to form a circulation groove 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 semi-elliptical shaped section.
- the large diameter of the ellipsoid portion of the patterns is greater than the width of the groove.
- the present invention also relates to a plate heat exchanger comprising a stack of exchange plates as previously described, said exchange plates being stacked so that:
- the first surfaces are opposite to each other to form a first fluid flow path
- the second sides are opposite to each other to form a second fluid circulation circuit.
- the points of contact between the exchange plates on their first faces are made at the corners of the corners of the patterns so that the patterns form relief pincushions.
- the second faces of the exchange plates are in contact with each other at the vertices of the patterns so as to form a second circulation circuit of a second heat transfer fluid between said exchange plates.
- the stack of exchange plates is arranged between two flat end plates.
- FIG. 1 shows a schematic representation in plan view of a stack of two exchange plates
- FIG. 2 shows an exploded schematic representation in perspective of a portion of the corrugated zone of two exchange plates according to a first embodiment
- FIG. 3 shows a schematic representation in perspective of a portion of the corrugated zone of the two exchange plates of FIG. 2 attached
- FIG. 4 shows a schematic representation in perspective of a portion of the corrugated zone of four exchange plates of FIG. 2 attached
- FIG. 5 shows a schematic representation in perspective and in section of a portion of the corrugated zone of the four exchange plates attached in FIG. 4
- FIG. 6 shows a schematic representation in section of a portion of the corrugated zone of an exchange plate according to a second embodiment
- FIGS. 8a and 8b show diagrammatic representations in section of a portion of the corrugated zone of a heat exchanger comprising exchange plates of FIG. 6.
- a second fluid circulation circuit B (visible in Figures 4 and 5) on a second side 10b, opposite the first face 10a, exchange plates 10 and wherein a second heat transfer fluid is intended to flow.
- 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 illustrated in FIG. 1, the circulation within the first A and second B fluid circulation circuits may especially be countercurrent to maximize heat exchanges between the first and second heat transfer fluids.
- the corrugations 3 comprise periodic patterns of contiguous reliefs.
- the periodicity between the patterns 20 is made 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 corrugation patterns 3 are obtained by stamping. More particularly, the patterns 20 may have an ellipsoid portion shape whose large diameter D20 (visible in FIG. 6) is parallel to the plane of the exchange plate 10. This ellipsoid portion configuration of the patterns 20 that the first face 10a of the exchange plate 10 has a recess for each pattern 20 and the second face 10b has a boss for each pattern 20.
- the ellipsoid of the ellipsoid portions may in particular be a flattened ellipsoid, that is to say that its small diameter d20 (visible in FIG. 6) is its diameter of revolution.
- the ellipsoid portions may be half-ellipsoids truncated on four sides perpendicular to each other 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, so 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 plates exchanges 10 on their first faces 10a are made at the corner junctions of the patterns 20.
- the patterns 20 form reliefs cushion.
- These pads are open on their four sides because of the truncations and form the first circulation circuit A of the first heat transfer fluid.
- the first heat transfer fluid can thus flow from one pattern 20 to another as well along the X axis as along the Y axis because of the truncations.
- the exchange plates 10 when two exchange plates 10 are contiguous to each other with their second faces 10a facing one another, the exchange plates 10 are in contact with each other. each other at the vertices of the patterns 20. Due to the ellipsoid portion shape, the exchange plates 10 form the second circulation circuit B of the second heat transfer fluid.
- the second heat transfer fluid can thus flow from one pattern 20 to another both along the X axis and along the Y axis because of the ellipsoid portion shape.
- this ellipsoid-shaped shape of the patterns makes it possible to have first and second asymmetric circulation circuits, that is to say the hydraulic diameter of which is different. This is particularly advantageous when the first and second heat transfer fluids are of different nature and / or circulate at different flow rates.
- the ellipsoid portion units 20 may 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 of circulation of a second coolant between two patterns 20.
- the groove 27 forms a stop on the first face 10a of the exchange plate 10.
- the groove 27 may also have a semi-elliptical shaped section 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 small diameter of the ellipse.
- the first diameter D27 is greater than the second diameter d27. It is however 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 smaller 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 thus 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.
- FIG. 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 large diameter D20 of the ellipsoid portion of the patterns 20 and the second diameter d27 of the groove 27, ie its width.
- the first diameter D27 of the groove 27 and the small diameter d20 of the ellipsoid portion are 1 mm.
- the large diameter D20 of the ellipsoid portion of the patterns 20 may for example vary between 1 and 5 mm while the second diameter d27 of the groove 27 may for example vary between 1 and 4 mm.
- 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 and two flat plates 11 of termination.
- the stack of exchange plates 10 is disposed between the two flat plates 11 of termination.
- the exchange plates 10 are stacked so that:
- FIG. 8b is a section taken 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 FIGS. 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 one another due to the ellipsoid portion of the patterns 20.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1750799A FR3062470B1 (fr) | 2017-01-31 | 2017-01-31 | Plaque d'echange pour echangeur de chaleur a plaques et echangeur de chaleur a plaques correspondant |
| PCT/FR2018/050223 WO2018142065A1 (fr) | 2017-01-31 | 2018-01-31 | Plaque d'échange pour échangeur de chaleur à plaques et échangeur de chaleur à plaques correspondant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3577407A1 true EP3577407A1 (fr) | 2019-12-11 |
| EP3577407B1 EP3577407B1 (fr) | 2022-09-07 |
Family
ID=58632449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18705698.1A Active EP3577407B1 (fr) | 2017-01-31 | 2018-01-31 | Plaque d'échange pour échangeur de chaleur à plaques et échangeur de chaleur à plaques correspondant |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3577407B1 (fr) |
| FR (1) | FR3062470B1 (fr) |
| WO (1) | WO2018142065A1 (fr) |
Family Cites Families (8)
| 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 (fr) * | 1984-02-14 | 1985-08-16 | Gea Ahlborn Gmbh Co Kg | Echangeur de chaleur a plaques |
| SE458806B (sv) * | 1987-04-21 | 1989-05-08 | Alfa Laval Thermal Ab | Plattvaermevaexlare med olika stroemningsmotstaand foer medierna |
| FR2705445B1 (fr) * | 1993-05-18 | 1995-07-07 | Vicarb Sa | Echangeur de chaleur à plaques. |
| DE19628009A1 (de) * | 1996-07-11 | 1998-01-15 | Basf Ag | Verfahren zum Eindampfen von wäßrigen Salzlösungen |
| SE518276C2 (sv) | 1997-12-19 | 2002-09-17 | Swep Int Ab | Plattvärmeväxlare |
| US8833741B2 (en) * | 2011-11-07 | 2014-09-16 | Spx Cooling Technologies, Inc. | Air-to-air atmospheric exchanger |
| FR3031583B1 (fr) * | 2015-01-08 | 2017-03-03 | Cie Ind D'applications Thermiques | Plaque pour echangeur de chaleur, procede de fabrication d'une telle plaque et echangeur de chaleur comprenant une telle plaque |
-
2017
- 2017-01-31 FR FR1750799A patent/FR3062470B1/fr not_active Expired - Fee Related
-
2018
- 2018-01-31 WO PCT/FR2018/050223 patent/WO2018142065A1/fr not_active Ceased
- 2018-01-31 EP EP18705698.1A patent/EP3577407B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3577407B1 (fr) | 2022-09-07 |
| FR3062470B1 (fr) | 2020-12-11 |
| WO2018142065A1 (fr) | 2018-08-09 |
| FR3062470A1 (fr) | 2018-08-03 |
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