US20010054499A1 - Corrugated fin with partial offset for a plate-type heat exchanger and corresponding plate-type heat exchanger - Google Patents
Corrugated fin with partial offset for a plate-type heat exchanger and corresponding plate-type heat exchanger Download PDFInfo
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- US20010054499A1 US20010054499A1 US09/835,409 US83540901A US2001054499A1 US 20010054499 A1 US20010054499 A1 US 20010054499A1 US 83540901 A US83540901 A US 83540901A US 2001054499 A1 US2001054499 A1 US 2001054499A1
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- Prior art keywords
- corrugation
- corrugated fin
- notch
- offset
- heat exchanger
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
- F25J5/002—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger
-
- 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
- F28D9/0068—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 with means for changing flow direction of one heat exchange medium, e.g. using deflecting zones
-
- 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
- F28F3/027—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 with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/42—Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/44—Particular materials used, e.g. copper, steel or alloys thereof or surface treatments used, e.g. enhanced surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
- F28F2250/108—Particular pattern of flow of the heat exchange media with combined cross flow and parallel flow
Definitions
- the present invention relates to a corrugated fin with partial offset for a plate-type heat exchanger, of the type defining a main overall direction of corrugation and comprising a number of adjacent rows of corrugations, each row being more or less transverse with respect to the said main overall direction and being offset, in its own longitudinal direction, with respect to the two adjacent rows, each row of corrugations comprising a set of corrugation legs connected alternately by a corrugation crest and a corrugation trough.
- Corrugated fins of this type are widely used in brazed-plate heat exchangers, which have the advantage of offering a large heat-exchange area in a relatively small volume, and of being easy to manufacture.
- fluid flows may be cocurrent, countercurrent or cross-flow.
- FIG. 1 of the appended drawings depicts, in perspective and with partial cutaways, one example of such a heat exchanger, of a conventional structure, to which the invention applies. This may, in particular, be a cryogenic heat exchanger.
- the heat exchanger 1 depicted consists of a stack of parallel rectangular plates 2 , all identical, which between them define a number of passages for fluids to be placed in an indirect heat-exchange relationship.
- these passages are, successively and cyclically, passages 3 for a first fluid, 4 for a second fluid and 5 for a third fluid.
- Each passage 3 to 5 is bordered by closure bars 6 which delimit it, leaving inlet/outlet openings 7 free for the corresponding fluid.
- closure bars 6 Placed in each passage are corrugated spacer pieces or corrugated fins 8 which act simultaneously as heat-exchange fins and as spacer pieces between the plates, particularly during the brazing operation, and to avoid any deformation of the plates when pressurized fluids are used, and serve to guide the flow of fluids.
- the stack of plates, closure bars and corrugated spacer pieces is generally made of aluminum or aluminum alloy and is assembled in a single operation by furnace brazing.
- Fluid inlet/outlet boxes 9 are then welded onto the exchanger body thus produced, to cap the corresponding rows of inlet/outlet openings, and are connected to pipes 109 for conveying and removing the fluids.
- corrugated spacer pieces 8 there are various types of corrugated spacer pieces 8 in existence.
- the conventional corrugated spacer piece known as the “serrated corrugation” is depicted in FIG. 2.
- This serrated corrugation has a main overall direction of corrugation D 1 and comprises a great many rows of adjacent corrugations 9 , all identical 9 A, 9 B, 9 C etc., oriented in a direction D 2 perpendicular to the direction D 1 .
- Each row of corrugations 3 has a crinkled shape and comprises a great many rectangular corrugation legs 10 , each contained in a vertical plane at right angles to the direction D 2 .
- each leg With respect to an overall direction F of flow of the fluid in the direction D 1 in the passage in question, each leg has a leading edge 11 and a trailing edge 12 .
- the legs are connected alternately along their upper edge by flat and horizontal rectangular corrugation crests 13 and along their lower edge by corrugation troughs 14 which are also rectangular, flat and horizontal.
- the rows 9 are offset from one another in the direction D 2 , in one direction and the other alternately.
- distance p separating two successive legs 10 as the “pitch” (neglecting the thickness e of the thin-sheet material of which the corrugation is made), the offset is p/2.
- each row 9 is connected to the next row 9 by the crests 13 , in sections of straight line 15 measuring p/2, and by the troughs 14 , in sections of straight line 16 with the same length p/2.
- the planes of offsetting are the vertical planes P AB , P BC , etc., and the planes of offsetting when viewed from above are denoted by 17 .
- each row 9 in the direction D 1 is denoted 1 , this length being termed the “serration length”, and the height of the corrugation is denoted h.
- the shapes of the various parts of the corrugations may differ somewhat from the theoretical shapes described hereinabove, particularly as regards the flatness of the facets 10 , 13 and 14 , the verticality and the rectangular shape of these facets.
- FIGS. 3 to 5 of the appended drawings are schematic cross sections taken, respectively, on the vertical plane III-III of FIG. 2, approximately on an offsetting plane P and on the horizontal mid-plane Q of the corrugation. These views illustrate the disadvantage of conventional serrated corrugations.
- the object of the present invention is to reduce or even to eliminate the pressure drops induced in the serrated corrugations by the offset from one row to the next.
- a subject of the invention is a corrugated fin with partial offset of the aforementioned type, characterized in that at least some corrugation legs have a notch on at least one edge and over at least part of their height.
- Another subject of the invention is a plate-type heat exchanger comprising corrugated fins as defined above.
- This exchanger of the type comprising a stack of parallel plates which define a number of passages of flat overall shape for the circulation of fluids, closure bars which delimit these passages, and corrugated fins arranged in the passages, is characterized in that at least some of the corrugated fins are according to the definition provided above.
- FIGS. 6 to 17 of the appended drawings in which:
- FIG. 6 depicts, in perspective, a corrugated fin according to the invention
- FIGS. 7 to 13 are views similar to FIG. 6 but corresponding to various other embodiments of the corrugated fin according to the invention.
- FIG. 14 is a view similar to FIG. 5 but relating to a corrugated fin like those of FIGS. 6, 7 and 8 ;
- FIG. 15 is a view similar to FIG. 14 but relating to a corrugated fin like those of FIGS. 9, 10 and 11 ;
- FIGS. 16 and 17 are details of FIGS. 5 and 14 respectively, illustrating one property of the corrugated fins according to the invention.
- each leg 10 comprises a notch 18 on its single leading edge 11 .
- This notch 18 extends from the trough 14 to mid-height, that is to say to the level h/2.
- FIGS. 6 to 13 two rows of corrugations 9 A and 9 B have been depicted in perspective.
- the corrugation elements have been given suffixes A and B according to the row to which they belong.
- FIG. 7 differs from that of FIG. 6 only in that the notches 18 , which again have the length h/2, are mid-way along the leading edges 11 of the legs 10 .
- FIG. 8 differs from the preceding embodiments only in that the notches 18 have the length h and extend over the entire height of the leading edges 11 , without, however, affecting the crests 13 and the troughs 14 .
- FIG. 9 differs from the previous one only in that the legs 10 also have a notch 21 over the entire height of the height of their trailing edge 12 , these notches 21 not affecting the crests 13 and the troughs 14 either.
- the corrugated fin of FIG. 10 differs from that of FIG. 7 only in the addition of a notch 21 of length h/2 mid-way along the trailing edge 12 of each leg.
- the notches 18 and 21 may have a length other than h/2, and less than h.
- each leg 10 has a notch 18 on its leading edge and a notch 21 on its trailing edge; these two notches have the same height which is between h/2 and h, and the same vertical position, but the notches are offset vertically from one leg to the other.
- the notches 18 and 21 are alternately adjacent to the crest of the corrugation 13 and to the trough 14 .
- FIG. 12 differs from that of FIG. 9 only in that the notches 18 and 21 continue alternately into the crests 13 and into the troughs 14 , weakening these.
- This weakening may be disadvantageous in the case of fluids conveyed under pressure, because it reduces the area of fin brazed to the adjacent plates of the exchanger.
- the notches 18 or 18 and 21 encourage two-dimensional flow of the fluid in the region of the offsetting lines 17 . Accordingly, the streams of fluid coming from the various channels in the fin are partially remixed. The efficiency of the heat exchange is thus improved.
- FIGS. 16 and 17 which respectively illustrate the flow of a stream of fluid through a conventional serrated corrugation (FIG. 16) and through a serrated corrugation according to the invention (FIG. 17) shows that the pressure drop by restriction at the passage of an offsetting line 17 is greatly reduced if the passage cross section 22 defined by the notch 18 (or by the notch 21 if only the trailing edge is notched, or by the notches 18 and 21 facing each other) is at least equal to half the passage cross section 23 of each channel defined between two legs 10 . In effect, the throttling upon crossing the line 17 is then eliminated.
- the fins described hereinabove can be made of various materials commonly used in plate-type heat exchangers: aluminum and aluminum alloys, copper and copper alloys, stainless steels and titanium.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
- The present invention relates to a corrugated fin with partial offset for a plate-type heat exchanger, of the type defining a main overall direction of corrugation and comprising a number of adjacent rows of corrugations, each row being more or less transverse with respect to the said main overall direction and being offset, in its own longitudinal direction, with respect to the two adjacent rows, each row of corrugations comprising a set of corrugation legs connected alternately by a corrugation crest and a corrugation trough.
- Corrugated fins of this type, generally known as “serrated corrugations”, are widely used in brazed-plate heat exchangers, which have the advantage of offering a large heat-exchange area in a relatively small volume, and of being easy to manufacture. In these exchangers, fluid flows may be cocurrent, countercurrent or cross-flow.
- FIG. 1 of the appended drawings depicts, in perspective and with partial cutaways, one example of such a heat exchanger, of a conventional structure, to which the invention applies. This may, in particular, be a cryogenic heat exchanger.
- The
heat exchanger 1 depicted consists of a stack of parallelrectangular plates 2, all identical, which between them define a number of passages for fluids to be placed in an indirect heat-exchange relationship. In the example depicted, these passages are, successively and cyclically,passages 3 for a first fluid, 4 for a second fluid and 5 for a third fluid. - Each
passage 3 to 5 is bordered by closure bars 6 which delimit it, leaving inlet/outlet openings 7 free for the corresponding fluid. Placed in each passage are corrugated spacer pieces orcorrugated fins 8 which act simultaneously as heat-exchange fins and as spacer pieces between the plates, particularly during the brazing operation, and to avoid any deformation of the plates when pressurized fluids are used, and serve to guide the flow of fluids. - The stack of plates, closure bars and corrugated spacer pieces is generally made of aluminum or aluminum alloy and is assembled in a single operation by furnace brazing.
- Fluid inlet/
outlet boxes 9, of semicylindrical overall shape, are then welded onto the exchanger body thus produced, to cap the corresponding rows of inlet/outlet openings, and are connected topipes 109 for conveying and removing the fluids. - There are various types of
corrugated spacer pieces 8 in existence. The conventional corrugated spacer piece known as the “serrated corrugation” is depicted in FIG. 2. - This serrated corrugation has a main overall direction of corrugation D1 and comprises a great many rows of
adjacent corrugations 9, all identical 9A, 9B, 9C etc., oriented in a direction D2 perpendicular to the direction D1. - For the convenience of the description, it will be assumed that, as depicted in FIG. 2, the directions D1 and D2 are horizontal.
- Each row of
corrugations 3 has a crinkled shape and comprises a great manyrectangular corrugation legs 10, each contained in a vertical plane at right angles to the direction D2. With respect to an overall direction F of flow of the fluid in the direction D1 in the passage in question, each leg has a leadingedge 11 and atrailing edge 12. The legs are connected alternately along their upper edge by flat and horizontalrectangular corrugation crests 13 and along their lower edge bycorrugation troughs 14 which are also rectangular, flat and horizontal. - The
rows 9 are offset from one another in the direction D2, in one direction and the other alternately. By terming distance p separating twosuccessive legs 10 as the “pitch” (neglecting the thickness e of the thin-sheet material of which the corrugation is made), the offset is p/2. - Thus, each
row 9 is connected to thenext row 9 by thecrests 13, in sections ofstraight line 15 measuring p/2, and by thetroughs 14, in sections ofstraight line 16 with the same length p/2. The planes of offsetting are the vertical planes PAB, PBC, etc., and the planes of offsetting when viewed from above are denoted by 17. - Incidentally, the length of each
row 9 in the direction D1 is denoted 1, this length being termed the “serration length”, and the height of the corrugation is denoted h. - In practice, the shapes of the various parts of the corrugations may differ somewhat from the theoretical shapes described hereinabove, particularly as regards the flatness of the
facets - FIGS.3 to 5 of the appended drawings are schematic cross sections taken, respectively, on the vertical plane III-III of FIG. 2, approximately on an offsetting plane P and on the horizontal mid-plane Q of the corrugation. These views illustrate the disadvantage of conventional serrated corrugations.
- What happens is that a given stream of fluid flowing in the overall direction D1 has available to it, within a
row 9, for example 9A, a wide passage cross section (FIG. 3), but this cross section is reduced in each plane P because of the presence of thelegs 10 from thenext row 9, in this instance thelegs 10B of therow 9B. - Thus, the characteristic offsetting of the serrated corrugations introduces a substantial pressure drop. In order to limit this effect, relatively
long serration lengths 1 need to be adopted, although these are not optimum from the thermal efficiency standpoint. - The object of the present invention is to reduce or even to eliminate the pressure drops induced in the serrated corrugations by the offset from one row to the next.
- To this end, a subject of the invention is a corrugated fin with partial offset of the aforementioned type, characterized in that at least some corrugation legs have a notch on at least one edge and over at least part of their height.
- Another subject of the invention is a plate-type heat exchanger comprising corrugated fins as defined above. This exchanger, of the type comprising a stack of parallel plates which define a number of passages of flat overall shape for the circulation of fluids, closure bars which delimit these passages, and corrugated fins arranged in the passages, is characterized in that at least some of the corrugated fins are according to the definition provided above.
- Some exemplary embodiments of the invention will now be described with reference to FIGS.6 to 17 of the appended drawings, in which:
- FIG. 6 depicts, in perspective, a corrugated fin according to the invention;
- FIGS.7 to 13 are views similar to FIG. 6 but corresponding to various other embodiments of the corrugated fin according to the invention;
- FIG. 14 is a view similar to FIG. 5 but relating to a corrugated fin like those of FIGS. 6, 7 and8;
- FIG. 15 is a view similar to FIG. 14 but relating to a corrugated fin like those of FIGS. 9, 10 and11; and
- FIGS. 16 and 17 are details of FIGS. 5 and 14 respectively, illustrating one property of the corrugated fins according to the invention.
- In the embodiment of FIG. 6, each
leg 10 comprises a notch 18 on its single leadingedge 11. This notch 18 extends from thetrough 14 to mid-height, that is to say to the level h/2. - In each of FIGS.6 to 13, two rows of
corrugations - The embodiment of FIG. 7 differs from that of FIG. 6 only in that the notches18, which again have the length h/2, are mid-way along the leading
edges 11 of thelegs 10. - The embodiment of FIG. 8 differs from the preceding embodiments only in that the notches18 have the length h and extend over the entire height of the leading
edges 11, without, however, affecting thecrests 13 and thetroughs 14. - The embodiment of FIG. 9 differs from the previous one only in that the
legs 10 also have a notch 21 over the entire height of the height of theirtrailing edge 12, these notches 21 not affecting thecrests 13 and thetroughs 14 either. - The corrugated fin of FIG. 10 differs from that of FIG. 7 only in the addition of a notch21 of length h/2 mid-way along the
trailing edge 12 of each leg. As an alternative, the notches 18 and 21 may have a length other than h/2, and less than h. - In the embodiment of the corrugated fin of FIG. 11, each
leg 10 has a notch 18 on its leading edge and a notch 21 on its trailing edge; these two notches have the same height which is between h/2 and h, and the same vertical position, but the notches are offset vertically from one leg to the other. Thus, on onerow corrugation 13 and to thetrough 14. - The embodiment of FIG. 12 differs from that of FIG. 9 only in that the notches18 and 21 continue alternately into the
crests 13 and into thetroughs 14, weakening these. This weakening may be disadvantageous in the case of fluids conveyed under pressure, because it reduces the area of fin brazed to the adjacent plates of the exchanger. - This is why it may be preferable, in certain applications, as depicted in FIG. 13, in this variant to adopt an offset less than p/2 from one
row 9 to the next. This thus yields an advantage of greater mechanical strength but, on the other hand, gives rise to a loss of thermal efficiency. - As illustrated in FIGS. 14 and 15, in all the variant embodiments of the
fin 8 described above, the notches 18 or 18 and 21 (or 21) encourage two-dimensional flow of the fluid in the region of theoffsetting lines 17. Accordingly, the streams of fluid coming from the various channels in the fin are partially remixed. The efficiency of the heat exchange is thus improved. - When there is also a vertical offset between the notches18 and 21, as in the case of FIG. 11, a three-dimensional effect is introduced into the flow of the fluid, and this encourages heat exchange even more.
- A comparison between FIGS. 16 and 17, which respectively illustrate the flow of a stream of fluid through a conventional serrated corrugation (FIG. 16) and through a serrated corrugation according to the invention (FIG. 17) shows that the pressure drop by restriction at the passage of an
offsetting line 17 is greatly reduced if thepassage cross section 22 defined by the notch 18 (or by the notch 21 if only the trailing edge is notched, or by the notches 18 and 21 facing each other) is at least equal to half thepassage cross section 23 of each channel defined between twolegs 10. In effect, the throttling upon crossing theline 17 is then eliminated. - The fins described hereinabove can be made of various materials commonly used in plate-type heat exchangers: aluminum and aluminum alloys, copper and copper alloys, stainless steels and titanium.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0004942 | 2000-04-17 | ||
FR0004942A FR2807828B1 (en) | 2000-04-17 | 2000-04-17 | CORRUGATED WING WITH PARTIAL OFFSET FOR PLATE HEAT EXCHANGER AND CORRESPONDING PLATE HEAT EXCHANGER |
Publications (2)
Publication Number | Publication Date |
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US20010054499A1 true US20010054499A1 (en) | 2001-12-27 |
US6415855B2 US6415855B2 (en) | 2002-07-09 |
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Application Number | Title | Priority Date | Filing Date |
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US09/835,409 Expired - Lifetime US6415855B2 (en) | 2000-04-17 | 2001-04-17 | Corrugated fin with partial offset for a plate-type heat exchanger and corresponding plate-type heat exchanger |
Country Status (5)
Country | Link |
---|---|
US (1) | US6415855B2 (en) |
JP (1) | JP4524052B2 (en) |
DE (1) | DE10118625B4 (en) |
FR (1) | FR2807828B1 (en) |
GB (1) | GB2362456B (en) |
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US10690421B2 (en) | 2012-03-28 | 2020-06-23 | Modine Manufacturing Company | Heat exchanger and method of cooling a flow of heated air |
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US20160010929A1 (en) * | 2013-02-27 | 2016-01-14 | Denso Corporation | Stacked heat exchanger |
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US20170234622A1 (en) * | 2014-10-01 | 2017-08-17 | Mitsubishi Heavy Industries Compressor Corporation | Plate laminated type heat exchanger |
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US11454448B2 (en) | 2017-11-27 | 2022-09-27 | Dana Canada Corporation | Enhanced heat transfer surface |
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Also Published As
Publication number | Publication date |
---|---|
JP2001349685A (en) | 2001-12-21 |
JP4524052B2 (en) | 2010-08-11 |
FR2807828B1 (en) | 2002-07-12 |
GB0109441D0 (en) | 2001-06-06 |
GB2362456B (en) | 2004-03-17 |
FR2807828A1 (en) | 2001-10-19 |
DE10118625A1 (en) | 2001-10-25 |
GB2362456A (en) | 2001-11-21 |
US6415855B2 (en) | 2002-07-09 |
DE10118625B4 (en) | 2021-07-22 |
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