EP4198435A1 - Heat exchanger with partial-height folded fins - Google Patents
Heat exchanger with partial-height folded fins Download PDFInfo
- Publication number
- EP4198435A1 EP4198435A1 EP22212503.1A EP22212503A EP4198435A1 EP 4198435 A1 EP4198435 A1 EP 4198435A1 EP 22212503 A EP22212503 A EP 22212503A EP 4198435 A1 EP4198435 A1 EP 4198435A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fin
- heat exchanger
- height
- pack
- folded
- 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.)
- Pending
Links
- 238000009792 diffusion process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005219 brazing Methods 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910000601 superalloy Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910018487 Ni—Cr Inorganic materials 0.000 description 3
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 229910001026 inconel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001088 rené 41 Inorganic materials 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0025—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 being formed by zig-zag bend plates
-
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0081—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 a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like element
-
- 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
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like 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
- F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
- F28F7/02—Blocks traversed by passages for heat-exchange media
-
- 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
- F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
Definitions
- the disclosure relates to heat exchangers and more particularly to a heat exchanger having fin pack structures to facilitate stacking.
- Conventional plate fin heat exchangers use folded fins on one or both sides of a parting plate, with side bars to seal flows from one another. This structure involves numerous parts that are brazed together to form a cube structure.
- Heat exchangers may also be cast.
- the cast plates define internal flow passages and external flow passages, and the plates are stacked with a fin pack positioned in the external flow passage defined between two cast plates.
- a heat exchanger that comprises a plurality of plates having opposed surfaces and side walls extending beyond the opposed surfaces to a height (h); and a fin pack extending from one opposed surface toward an opposed surface of an adjacent plate, and having a fin height (f), wherein the fin height (f) is equal to or less than the height (h) .
- the heat exchanger further comprises a second fin pack having a height (h) and extending from the opposed surface of the adjacent plate toward the one opposed surface and having a fin height (f) that is less than or equal to the height (h).
- a gap is defined between the fin pack and the second fin pack.
- the fin packs are a folded structure, and the gap is defined between crests of the folded structure.
- the gap is less than or equal to 0.020 inches (0.508 mm).
- the plurality of plates are stacked with side walls of adjacent plates bonded to each other.
- the plurality of plates define an internal flow passage.
- the opposed surfaces of adjacent plates of the plurality of plates define an external flow passage
- the fin pack comprises two fin packs in the external flow passage, with one of the two fin packs extending from each of the opposed surfaces toward the other of the two fin packs.
- the fin pack is diffusion bonded or brazed to one of the opposed surfaces.
- a heat exchanger subassembly that comprises a plate having first and second opposed surfaces, and side walls extending transverse to the opposed surfaces to define a side wall height (h) relative to the opposed surfaces; at least one internal flow passage defined in the plate; and a first folded fin pack on the first opposed surface and a second folded fin pack on the second opposed surface, each folded fin pack having a fin height (f) that is less than or equal to the side wall height (h).
- the internal flow passage extends substantially transverse to flow passages defined along walls of the first folded fin pack and the second folded fin pack.
- first folded fin pack and the second folded fin pack are bonded to the first and second opposed surfaces.
- a method for making a heat exchanger comprises bonding a first folded fin pack and a second folded fin pack to opposed surfaces of a plate having side walls and an internal flow passage to form a heat exchanger subassembly; stacking the heat exchanger subassembly with a further heat exchanger subassembly with a gap defined between adjacent folded fin packs; and bonding the heat exchanger subassembly to the further heat exchanger subassembly at contacting surfaces of the side wall of each heat exchanger subassembly.
- the bonding step comprises diffusion bonding.
- the bonding step comprises brazing.
- the side walls extend beyond the opposed surfaces to a height (h), and wherein the fin pack has a fin height (f), wherein the fin height (f) is equal to or less than the height (h).
- the present disclosure relates to heat exchangers and, more particularly, to cast heat exchangers defining external cooling passages when stacked, and having partial-height fin packs in the external cooling passages.
- FIG. 1 illustrates a known heat exchanger assembly 1 wherein brazing sheets 2 and folded fins 3 are alternatingly stacked. Side bars 4 are positioned along the non-flow edges of the fins to seal flows from one another, and the entire structure is brazed together.
- FIG. 2 is a cross section through a known cast heat exchanger 5 that can be an alternative to the heat exchanger of FIG. 1 .
- cast plates 6 have internal flow passages (not shown in FIG. 2 ) and have cast side portions 7 that extend vertically above the central surfaces 8 of plates 6. When stacked, this defines an external passage 9 bounded by surfaces 8 and side portions 7.
- a fin pack 10 is positioned in external passage 9. In this configuration, tolerance stackups may lead to mismatch of the fin pack, particularly the height of the fin pack, and the height of the external passage defined between the plate surfaces. This leads to either difficulty in bonding the fin pack to both surfaces, or the fin pack being too large for the height of the external passage, leading to difficulties in manufacturing.
- a heat exchanger 20 can include heat exchanger subassemblies 22 having a cast plate 24 and partial-height fin packs 26, 28 on opposed surfaces 30, 32 as shown.
- Cast plate 24 defines internal passages 34 for an internal flow, and has side walls 36 that extend upwardly and downwardly beyond a central surfaces 30, 32 (or beyond a central part of each plate 24 defining the opposed surfaces 30, 32).
- Subassemblies 22 as shown in FIG. 3 can be stacked, see cross section of FIG. 4 , and this defines heat exchanger 20 having external flow passages 38 defined between surfaces 30, 32 and internal portions 40 of side walls 36.
- internal passages 34 are substantially transverse to external flow passages 38, defining a cross flow heat exchanger.
- the partial height fins as disclosed herein would also be well suited to a counter flow heat exchanger wherein flows are counter to each other and substantially parallel, and to other configurations as well.
- Each side wall 36 extends beyond a surface 30, 32 by a height h, and when stacked, the height h of two adjacent plates 24 defines an external flow passage height H between surfaces 30, 32 of adjacent plates 24.
- Fin packs 26, 28 are referred to herein as "partial-height" fin packs because they are configured to have a fin height (f) that can correspond to the height (h) defined by side wall 36. In this configuration, fin height (f) can be approximately the same or less than height (h) such that, when subassemblies 22 are stacked, fin packs 26, 28 of adjacent plates extend toward each other in external flow passage 38 with a small gap defined between them. This allows each fin pack 26, 28 to be bonded to a surface 30, 32 without issues caused by tolerance stackups. As shown in FIGS. 4 and 5 , stacking defines external flow passage 38 between surfaces 30, 32 and having two fin packs 26, 28 positioned for interacting with flow as desired.
- Suitable materials for plate 24 include, but are not limited to: stainless steel, austenitic nickel-chromium-based superalloy such as that marketed under the trademark Inconel, nickel chromium superalloy such as that marketed under the trademark Rene 41, nickel based super-alloy such as that marketed under the trademark Mar-M, and other nickel based super-alloys.
- Plate 24 can be flat, or can be shaped to suit specific uses. In one non-limiting example the plate can be curved.
- Fin packs can be made using known techniques, and suitable materials for fin packs 26, 28 include, but are not limited to: stainless steel, nickel-chromium-based superalloy such as that marketed under the trademark Inconel and other nickel based super-alloys.
- Fin packs 26, 28 can be bonded, for example diffusion bonded, or brazed, to plate 24, for example to both surfaces 30, 32 of plate 24, to produce subassembly 22 such as that illustrated in FIG. 3 .
- Subassemblies 22 can then be stacked and joined at contacting sidewall surfaces 42, again for example by bonding or brazing, diffusion bonding, or other techniques that are known to persons skilled in the art.
- Height (h) of sidewalls can be the same or different on opposite sides of plate 24. Having height (h) be the same is suitable from a uniformity standpoint, but in specialized configurations it may be desirable to have different heights (h) on different surfaces 30, 32.
- Fin height of the fin packs 26, 28 can also be the same, and this matches up with the configuration wherein height (h) is the same on both surfaces 30, 32. It should be appreciated that in some configurations, it may be desirable to have fin heights be different on different surfaces 30, 32, and this can still be accomplished as long as the combined fin height is configured to match height H defined between surfaces 30, 32.
- gap 44 between fold ends 46 can be kept to a very small dimension, for example less than about 0.020 inches (0.508 mm). Gap 44 is not shown to scale.
- Fin packs having fin height (f) equal to or less than height (h) allow fabrication of a stacked heat exchanger where fin packs are brazed to both opposed surfaces that define the external flow passage, and therefore have the desired heat exchange properties with these surfaces, and at the same time the disclosed fin height allows stacking of the heat exchanger subassemblies without issues caused with a single fin pack in known heat exchangers such as that illustrated in FIGS. 1 and 2 .
- Partial height fin packs allow manufacture of heat exchanger subassemblies having the heat exchanger plate as disclosed, with a fin pack on each opposed surface, and brazed or diffusion bonded to the opposed surface. Heat exchanger subassemblies can then be stacked, and the height of the fins as compared to the side wall of the plate allows stacking with a small gap between the fin packs, thereby avoiding issues with respect to stack up tolerance mismatch and the like wherein a single fin pack would either be too large to fit in the space between plates, or would be too small and therefore difficult to bond to both surfaces.
- the subassemblies are stacked as desired, they can then be brazed or diffusion bonded together at the contacting side wall surfaces to complete the heat exchanger.
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
- The disclosure relates to heat exchangers and more particularly to a heat exchanger having fin pack structures to facilitate stacking.
- Conventional plate fin heat exchangers use folded fins on one or both sides of a parting plate, with side bars to seal flows from one another. This structure involves numerous parts that are brazed together to form a cube structure.
- Heat exchangers may also be cast. In this configuration, the cast plates define internal flow passages and external flow passages, and the plates are stacked with a fin pack positioned in the external flow passage defined between two cast plates.
- Tolerance stackups when stacking such structures make it difficult to bond the fin pack to upper and lower sides of the two cast plates, where the fin pack either does not fit within the space, or does not reach both of the upper and lower sides to allow bonding to each surface.
- In one aspect, there is provided a heat exchanger that comprises a plurality of plates having opposed surfaces and side walls extending beyond the opposed surfaces to a height (h); and a fin pack extending from one opposed surface toward an opposed surface of an adjacent plate, and having a fin height (f), wherein the fin height (f) is equal to or less than the height (h) .
- In some examples, the heat exchanger further comprises a second fin pack having a height (h) and extending from the opposed surface of the adjacent plate toward the one opposed surface and having a fin height (f) that is less than or equal to the height (h).
- In some examples, a gap is defined between the fin pack and the second fin pack.
- In some examples, the fin packs are a folded structure, and the gap is defined between crests of the folded structure.
- In some examples, the gap is less than or equal to 0.020 inches (0.508 mm).
- In some examples, the plurality of plates are stacked with side walls of adjacent plates bonded to each other.
- In some examples, the plurality of plates define an internal flow passage.
- In some examples, the opposed surfaces of adjacent plates of the plurality of plates define an external flow passage, and the fin pack comprises two fin packs in the external flow passage, with one of the two fin packs extending from each of the opposed surfaces toward the other of the two fin packs.
- In some examples, the fin pack is diffusion bonded or brazed to one of the opposed surfaces.
- There is also provided a heat exchanger subassembly that comprises a plate having first and second opposed surfaces, and side walls extending transverse to the opposed surfaces to define a side wall height (h) relative to the opposed surfaces; at least one internal flow passage defined in the plate; and a first folded fin pack on the first opposed surface and a second folded fin pack on the second opposed surface, each folded fin pack having a fin height (f) that is less than or equal to the side wall height (h).
- In some examples, the internal flow passage extends substantially transverse to flow passages defined along walls of the first folded fin pack and the second folded fin pack.
- In some examples, the first folded fin pack and the second folded fin pack are bonded to the first and second opposed surfaces.
- There is also provided a method for making a heat exchanger comprises bonding a first folded fin pack and a second folded fin pack to opposed surfaces of a plate having side walls and an internal flow passage to form a heat exchanger subassembly; stacking the heat exchanger subassembly with a further heat exchanger subassembly with a gap defined between adjacent folded fin packs; and bonding the heat exchanger subassembly to the further heat exchanger subassembly at contacting surfaces of the side wall of each heat exchanger subassembly.
- In some examples, the bonding step comprises diffusion bonding.
- In some examples, the bonding step comprises brazing.
- In some examples, the side walls extend beyond the opposed surfaces to a height (h), and wherein the fin pack has a fin height (f), wherein the fin height (f) is equal to or less than the height (h).
- A detailed description of preferred embodiments of the invention follows, with referenced to the attached drawings, wherein:
-
FIG. 1 schematically illustrates components of a known heat exchanger; -
FIG. 2 illustrates a cross sectional view of a different configuration of a known cast heat exchanger; -
FIG. 3 schematically illustrates one non-limiting configuration of a heat exchanger sub-assembly; -
FIG. 4 is a cross section through a stacked heat exchanger having sub-assemblies such as are illustrated inFIG. 3 ; and -
FIG. 5 is an enlarged view of a portion ofFIG. 4 . - Like reference numbers and designations in the various drawings indicate like elements.
- The present disclosure relates to heat exchangers and, more particularly, to cast heat exchangers defining external cooling passages when stacked, and having partial-height fin packs in the external cooling passages.
-
FIG. 1 illustrates a knownheat exchanger assembly 1 whereinbrazing sheets 2 and foldedfins 3 are alternatingly stacked.Side bars 4 are positioned along the non-flow edges of the fins to seal flows from one another, and the entire structure is brazed together. -
FIG. 2 is a cross section through a knowncast heat exchanger 5 that can be an alternative to the heat exchanger ofFIG. 1 . InFIG. 2 ,cast plates 6 have internal flow passages (not shown inFIG. 2 ) and have castside portions 7 that extend vertically above thecentral surfaces 8 ofplates 6. When stacked, this defines anexternal passage 9 bounded bysurfaces 8 andside portions 7. Afin pack 10 is positioned inexternal passage 9. In this configuration, tolerance stackups may lead to mismatch of the fin pack, particularly the height of the fin pack, and the height of the external passage defined between the plate surfaces. This leads to either difficulty in bonding the fin pack to both surfaces, or the fin pack being too large for the height of the external passage, leading to difficulties in manufacturing. - Turning to
FIGS. 3-5 , aheat exchanger 20 can includeheat exchanger subassemblies 22 having acast plate 24 and partial-height fin packs opposed surfaces Cast plate 24 definesinternal passages 34 for an internal flow, and hasside walls 36 that extend upwardly and downwardly beyond acentral surfaces 30, 32 (or beyond a central part of eachplate 24 defining theopposed surfaces 30, 32). -
Subassemblies 22 as shown inFIG. 3 can be stacked, see cross section ofFIG. 4 , and this definesheat exchanger 20 havingexternal flow passages 38 defined betweensurfaces internal portions 40 ofside walls 36. In the configuration shown,internal passages 34 are substantially transverse toexternal flow passages 38, defining a cross flow heat exchanger. It should be appreciated that the partial height fins as disclosed herein would also be well suited to a counter flow heat exchanger wherein flows are counter to each other and substantially parallel, and to other configurations as well. - Each
side wall 36 extends beyond asurface adjacent plates 24 defines an external flow passage height H betweensurfaces adjacent plates 24. -
Fin packs side wall 36. In this configuration, fin height (f) can be approximately the same or less than height (h) such that, whensubassemblies 22 are stacked,fin packs external flow passage 38 with a small gap defined between them. This allows eachfin pack surface FIGS. 4 and5 , stacking definesexternal flow passage 38 betweensurfaces fin packs - The disclosed configuration is well suited to fabrication through casting but it should be appreciated that other methods of manufacturing could also be utilized to produce
heat exchanger 20 andsubassemblies 22 as disclosed. - Suitable materials for
plate 24 include, but are not limited to: stainless steel, austenitic nickel-chromium-based superalloy such as that marketed under the trademark Inconel, nickel chromium superalloy such as that marketed under the trademark Rene 41, nickel based super-alloy such as that marketed under the trademark Mar-M, and other nickel based super-alloys. -
Plate 24 can be flat, or can be shaped to suit specific uses. In one non-limiting example the plate can be curved. - Fin packs can be made using known techniques, and suitable materials for
fin packs -
Fin packs plate 24, for example to bothsurfaces plate 24, to produce subassembly 22 such as that illustrated inFIG. 3 . -
Subassemblies 22 can then be stacked and joined at contactingsidewall surfaces 42, again for example by bonding or brazing, diffusion bonding, or other techniques that are known to persons skilled in the art. - Height (h) of sidewalls can be the same or different on opposite sides of
plate 24. Having height (h) be the same is suitable from a uniformity standpoint, but in specialized configurations it may be desirable to have different heights (h) ondifferent surfaces - Fin height of the
fin packs surfaces different surfaces surfaces - When height (h) is the same on both sides, then the same fin packs can be bonded to each
surface - With the configuration as disclosed herein,
gap 44 between fold ends 46 (FIG. 5 ) can be kept to a very small dimension, for example less than about 0.020 inches (0.508 mm).Gap 44 is not shown to scale. - Fin packs having fin height (f) equal to or less than height (h) allow fabrication of a stacked heat exchanger where fin packs are brazed to both opposed surfaces that define the external flow passage, and therefore have the desired heat exchange properties with these surfaces, and at the same time the disclosed fin height allows stacking of the heat exchanger subassemblies without issues caused with a single fin pack in known heat exchangers such as that illustrated in
FIGS. 1 and 2 . - Partial height fin packs allow manufacture of heat exchanger subassemblies having the heat exchanger plate as disclosed, with a fin pack on each opposed surface, and brazed or diffusion bonded to the opposed surface. Heat exchanger subassemblies can then be stacked, and the height of the fins as compared to the side wall of the plate allows stacking with a small gap between the fin packs, thereby avoiding issues with respect to stack up tolerance mismatch and the like wherein a single fin pack would either be too large to fit in the space between plates, or would be too small and therefore difficult to bond to both surfaces.
- Once the subassemblies are stacked as desired, they can then be brazed or diffusion bonded together at the contacting side wall surfaces to complete the heat exchanger.
- One or more embodiments of the present disclosure have been described. Nevertheless, it will be understood that various modifications may be made without departing from the scope of the invention.
- Accordingly, other embodiments are within the scope of the following claims.
Claims (15)
- A heat exchanger (20), comprising:a plurality of plates (24) having opposed surfaces (30, 32) and side walls (36) extending beyond the opposed surfaces (30, 32) to a height (h);a fin pack (26) extending from one opposed surface (30) toward an opposed surface (32) of an adjacent plate (24), and having a fin height (f), wherein the fin height (f) is equal to or less than the height (h).
- The heat exchanger (20) of claim 1, further comprising a second fin pack (28) having a height (h) and extending from the opposed surface (32) of the adjacent plate (24) toward the one opposed surface (30) and having a fin height (f) that is less than or equal to the height (h).
- The heat exchanger (20) of claim 2, wherein a gap (44) is defined between the fin pack (26) and the second fin pack (28).
- The heat exchanger (20) of claim 3, wherein the fin packs (26, 28) are a folded structure, and wherein the gap (44) is defined between crests (46) of the folded structure.
- The heat exchanger (20) of claim 3 or 4, wherein the gap (44) is less than or equal to 0.020 inches (0.508 mm).
- The heat exchanger (20) of any preceding claim, wherein the plurality of plates (24) are stacked with side walls (36) of adjacent plates (24) bonded to each other.
- The heat exchanger (20) of any preceding claim, wherein the plurality of plates (24) define an internal flow passage (34).
- The heat exchanger (20) of any preceding claim, wherein the opposed surfaces (30, 32) of adjacent plates (24) of the plurality of plates (24) define an external flow passage (38), and wherein the fin pack (26, 28) comprises two fin packs (26, 28) in the external flow passage (38), with one of the two fin packs (26, 28) extending from each of the opposed surfaces (30, 32) toward the other of the two fin packs (28, 26).
- The heat exchanger (20) of any preceding claim, wherein the fin pack (26; 28) is diffusion bonded or brazed to one of the opposed surfaces (30, 32).
- A heat exchanger subassembly (22), comprising:a plate (24) having first and second opposed surface (30, 32), and side walls (36) extending transverse to the opposed surfaces (30, 32) to define a side wall height (h) relative to the opposed surfaces (30, 32);at least one internal flow passage (34) defined in the plate (24); anda first folded fin pack (26) on the first opposed surface (30) and a second folded fin pack (28) on the second opposed surface (32), each folded fin pack (26, 28) having a fin height (f) that is less than or equal to the side wall height (h).
- The heat exchanger subassembly (22) of claim 10, wherein the internal flow passage (34) extends substantially transverse to flow passages (38) defined along walls of the first folded fin pack (26) and the second folded fin pack (28); and/or wherein the first folded fin pack (26) and the second folded fin pack (28) are bonded to the first and second opposed surfaces (30, 32).
- A method for making a heat exchanger (20), comprising:bonding a first folded fin pack (26) and a second folded fin pack (28) to opposed surfaces (30, 32) of a plate (24) having side walls (36) and an internal flow passage (34) to form a heat exchanger subassembly (22);stacking the heat exchanger subassembly (22) with a further heat exchanger subassembly (22) with a gap (44) defined between adjacent folded fin packs (26, 28); andbonding the heat exchanger subassembly (22) to the further heat exchanger subassembly (22) at contacting surfaces (42) of the side wall (36) of each heat exchanger subassembly (22).
- The method of claim 12, wherein the bonding step comprises diffusion bonding.
- The method of claim 12, wherein the bonding step comprises brazing.
- The method of any of claims 12 to 14, wherein the side walls (36) extend beyond the opposed surfaces (30, 32) to a height (h), and wherein the fin pack (26, 28) has a fin height (f), wherein the fin height (f) is equal to or less than the height (h).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/553,929 US20230194182A1 (en) | 2021-12-17 | 2021-12-17 | Heat exchanger with partial-height folded fins |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4198435A1 true EP4198435A1 (en) | 2023-06-21 |
Family
ID=84487824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22212503.1A Pending EP4198435A1 (en) | 2021-12-17 | 2022-12-09 | Heat exchanger with partial-height folded fins |
Country Status (2)
Country | Link |
---|---|
US (1) | US20230194182A1 (en) |
EP (1) | EP4198435A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130020061A1 (en) * | 2010-04-09 | 2013-01-24 | Ingersoll-Rand Company | Formed microchannel heat exchanger |
US9291403B2 (en) * | 2010-03-31 | 2016-03-22 | Yutaka Giken Co., Ltd. | Heat exchanger |
DE102019119257A1 (en) * | 2019-07-16 | 2021-01-21 | Bayerische Motoren Werke Aktiengesellschaft | Exhaust gas recirculation cooler for an internal combustion engine, method for producing such an exhaust gas recirculation cooler and motor vehicle with at least one such exhaust gas recirculation cooler |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE480535A (en) * | 1943-07-29 | |||
GB954066A (en) * | 1960-12-08 | 1964-04-02 | Marston Excelsior Ltd | Improvements relating to heat exchangers |
EP0132237A3 (en) * | 1983-06-30 | 1986-02-05 | Renato Ferroni | Element for exchanging heat between fluids, and radiator constructed with the said heat exchange element |
FR2625692B1 (en) * | 1988-01-13 | 1990-06-22 | Inst Francais Du Petrole | INTERNAL THERMAL CONTROL REACTOR BY HEAT EXCHANGE HOLLOW PLATES |
US5383517A (en) * | 1993-06-04 | 1995-01-24 | Dierbeck; Robert F. | Adhesively assembled and sealed modular heat exchanger |
US5303770A (en) * | 1993-06-04 | 1994-04-19 | Dierbeck Robert F | Modular heat exchanger |
AU1851997A (en) * | 1996-02-01 | 1997-08-22 | Northern Research & Engineering Corporation | Unit construction plate-fin heat exchanger |
US6173493B1 (en) * | 1998-10-15 | 2001-01-16 | Robert F. Dierbeck | Modular heat exchanger and method of making |
US6216343B1 (en) * | 1999-09-02 | 2001-04-17 | The United States Of America As Represented By The Secretary Of The Air Force | Method of making micro channel heat pipe having corrugated fin elements |
EP1243886A4 (en) * | 1999-12-27 | 2006-05-03 | Sumitomo Prec Products Company | Plate fin type heat exchanger for high temperature |
JP2002164071A (en) * | 2000-11-27 | 2002-06-07 | Mitsubishi Heavy Ind Ltd | Stacked heat exchanger |
DE102004057526B4 (en) * | 2003-12-03 | 2020-08-20 | Denso Corporation | Stack cooler |
JP4487880B2 (en) * | 2004-08-26 | 2010-06-23 | 株式会社デンソー | Intercooler |
FR2887020B1 (en) * | 2005-06-09 | 2007-08-31 | Air Liquide | PLATE HEAT EXCHANGER WITH EXCHANGE STRUCTURE FORMING MULTIPLE CHANNELS IN A PASSAGE |
DE102006043951A1 (en) * | 2005-09-16 | 2007-05-03 | Behr Gmbh & Co. Kg | Heat exchanger e.g. exhaust gas cooler or intercooler, for motor vehicle, has gas pipes with ends, which open out at one side of pipes to form rectangular cross section, where pipe ends are soldered with pipe bases |
US8136578B2 (en) * | 2006-03-13 | 2012-03-20 | Volvo Lastvagnar Ab | Heat exchanger for EGR-gas |
JP5321271B2 (en) * | 2009-06-17 | 2013-10-23 | 株式会社デンソー | Heat exchanger for high temperature gas cooling |
DE102012201710A1 (en) * | 2011-02-14 | 2012-08-16 | Denso Corporation | heat exchangers |
US20130206376A1 (en) * | 2012-02-14 | 2013-08-15 | The University Of Tokyo | Heat exchanger, refrigeration cycle device equipped with heat exchanger, or heat energy recovery device |
US20190170445A1 (en) * | 2017-12-01 | 2019-06-06 | United Technologies Corporation | High temperature plate fin heat exchanger |
-
2021
- 2021-12-17 US US17/553,929 patent/US20230194182A1/en active Pending
-
2022
- 2022-12-09 EP EP22212503.1A patent/EP4198435A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9291403B2 (en) * | 2010-03-31 | 2016-03-22 | Yutaka Giken Co., Ltd. | Heat exchanger |
US20130020061A1 (en) * | 2010-04-09 | 2013-01-24 | Ingersoll-Rand Company | Formed microchannel heat exchanger |
DE102019119257A1 (en) * | 2019-07-16 | 2021-01-21 | Bayerische Motoren Werke Aktiengesellschaft | Exhaust gas recirculation cooler for an internal combustion engine, method for producing such an exhaust gas recirculation cooler and motor vehicle with at least one such exhaust gas recirculation cooler |
Also Published As
Publication number | Publication date |
---|---|
US20230194182A1 (en) | 2023-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20210170535A1 (en) | Plate-fin heat exchanger core design for improved manufacturing | |
JPS6227352B2 (en) | ||
JP2012112644A (en) | Heat exchanger | |
JP5511917B2 (en) | Assembly structure of plate fin type heat exchanger and manufacturing method of plate fin type heat exchanger | |
WO2017131240A1 (en) | Stacked plate heat exchanger | |
EP4198435A1 (en) | Heat exchanger with partial-height folded fins | |
EP3779342B1 (en) | Heat exchanger | |
JPH0416707B2 (en) | ||
JP2023518546A (en) | flat plate heat exchanger | |
JPH0645163Y2 (en) | Plate fin type heat exchanger | |
US20200025454A1 (en) | Fin-plate heat exchanger | |
EP4411301A1 (en) | Conformal heat exchanger with triangular offset strip fins | |
WO2005038378A1 (en) | Stacked plate heat exchanger with anticlastic ribs for plate alignment | |
US20230400258A1 (en) | Heat exchanger core layer | |
JP2543973Y2 (en) | Heat exchanger | |
EP4209348A1 (en) | Heat exchanger with undulating parting sheets | |
JP4312640B2 (en) | Stacked heat exchanger | |
EP4306891A1 (en) | Triangular flow passage heat exchanger | |
JP3935711B2 (en) | Manufacturing method of heat exchanger | |
EP4414651A1 (en) | Interlocking plate heat exchanger | |
JP2584745Y2 (en) | Stacked heat exchanger | |
JPS63153397A (en) | Lamination type heat exchanger | |
JPH029279Y2 (en) | ||
JPH08200972A (en) | Plate fin type heat exchanger | |
JPH0622781U (en) | Laminated heat exchange core |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RTX CORPORATION |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20231218 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |