EP0835416B1 - Heat exchanger with improved configuration - Google Patents

Heat exchanger with improved configuration Download PDF

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Publication number
EP0835416B1
EP0835416B1 EP96921155A EP96921155A EP0835416B1 EP 0835416 B1 EP0835416 B1 EP 0835416B1 EP 96921155 A EP96921155 A EP 96921155A EP 96921155 A EP96921155 A EP 96921155A EP 0835416 B1 EP0835416 B1 EP 0835416B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plates
channels
sort
combination
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.)
Expired - Lifetime
Application number
EP96921155A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0835416A1 (en
Inventor
Wessel Bart Veltkamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Level Energietechniek BV
Original Assignee
Level Energietechniek BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Level Energietechniek BV filed Critical Level Energietechniek BV
Publication of EP0835416A1 publication Critical patent/EP0835416A1/en
Application granted granted Critical
Publication of EP0835416B1 publication Critical patent/EP0835416B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • 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
    • F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction

Definitions

  • the invention relates to a heat exchanger, comprising channels of the first sort and channels of the second sort, wherein the channels extend mutually parallel, are mutually separated by walls, are substantially mutually adjacent and in section are ordered according to a regular pattern.
  • Such a heat exchanger is known inter alia from the patent application with publication number WO 94/100520.
  • This heat exchanger of the prior art has the drawback that the seals between the various walls must satisfy strict requirements relating to the sealing of the fluids to be transported through the heat exchanger in order to prevent fluid flowing in the channels of the first sort from entering fluid flowing through channels of the second sort and vice versa.
  • DE-A-33 30 254 discloses a heat exchanger comprising channels of the first sort and channels of the second sort, wherein the channels extend mutually parallel, over the full length of the heat exchanger, are mutually separated by walls, are substantially mutually adjacent, and in cross section are arranged to a regular pattern, the heat exchanger being assembled from flat plates and profiled plates stacked alternately on eachother and forming the walls, wherein the profiled plates come into contact with both adjoining flat plates and each of the plates forms a separation between channnels of the first sort on a first side and channnels of the second sort on the second side.
  • the flat and the profiled plates being provided on at least one of their sides with a connecting piece formed by continuations being flat and mutually equidistant and transitional areas being formed between the plates (2,3) and the continuations.
  • EP-A-20B 042 shows a heat exchanger comprising only flat plots being provided with grooves functioning as supports.
  • Another application lies in use as condenser and also recuperator in for instance tumble dryers or refrigeration installations, or as pre-heater for burners.
  • the profiled plates are connected by adhesion to each of the adjoining flat plates.
  • the continuations of the flat plates and the flat continuations of the profiled plates extend into the region of the first and the second connecting space, and the continuations of the plates are interrupted at the position of the first and second connecting space.
  • FIG. 1 Shown in figure 1 is a heat exchanger 1 which is formed by plates 2, 3 stacked on each other.
  • This configuration is particularly suitable for heating fresh ventilating air flowing into a house by warm ventilating air leaving the house.
  • the plates are formed alternately by flat plates 2 and by profiled plates 3, as will be elucidated hereinbelow, inter alia with reference to figure 2.
  • Figure 1 serves only to demonstrate that the heat exchanger 1 is essentially formed by plates 2,3 which are stacked on each other and which are placed in a housing 4.
  • the housing 4 is divided on the top of the heat exchanger 1 into a first chamber 5 and a second chamber 6.
  • the first chamber 5 is provided with a connection 7 for supply of discharge air, while a connection 8 is arranged in the second space 6 for discharge of the fresh air.
  • a fan 9 is furthermore arranged in the second space 6.
  • the housing 4 On the underside of the actual heat exchanger 1 the housing 4 is divided into a third space 10 and a fourth space 11.
  • the third space 10 is provided with a connection 12 for supply of fresh air
  • the fourth space 11 is provided with a discharge connection 13 for used air.
  • a further fan 14 is moreover arranged in the space 11.
  • the air for discharge via the connecting piece 7 is guided via the space 5 to the actual heat exchanger which is formed by the plates 2,3 stacked on each other, exits therefrom into the fourth space 11 in housing 4 and is discharged by means of fan 14 and connecting piece 13.
  • the actual heat exchanger is formed by plates 2,3 stacked on each other.
  • Figure 2 shows a detail of a profiled plate 3.
  • the plate 3 comprises a highly profiled portion 15.
  • This portion has in cross section a profile corrugated in V-shape, wherein it is noted that the invention is not limited to a purely V-shape; it is also possible to use other shapes, for example a sine shape or other slightly rounded shape.
  • a flat portion 16 On the outside the plate 3 is formed by a flat portion 16.
  • This flat portion 16 serves respectively to discharge and supply the fluids for carrying through the V-shaped recesses which are otherwise bounded on their top side by the flat plate 2 for placing on plate 3.
  • a standing edge 17 On its outside the plate 3 is provided with a standing edge 17 which transposes into a flat edge 18, with which the relevant plate can be adhered to the flat plate for fixing thereon.
  • the plates are manufactured from a plastic which is easy to thermally deform.
  • Figure 2 further shows that the flat portion 16 is provided with ribs 19 and 20 respectively.
  • the guide rib 19 serves to guide to the relevant channels the gases leaving the channels of the first sort or to be fed thereto and also to maintain distance between the flat portion 16 and the flat plate 2 placed thereon.
  • the same consideration applies for the downward directed guide ribs 20; however, these form the spacer to the flat plate 2 placed under the plate 3.
  • transition area 21 which is shown in more detail in figure 3.
  • Figure 3 shows clearly how the triangular configuration transposes into the flat configuration via a gradual transition area.
  • figure 4 shows in schematic form a complete plate 3. It is pointed out here that the plate shown in figure 4 has relatively few channels; the number of channels is in fact much greater relative to the dimensions of the plate.
  • FIG 6 Shown in figure 6 is a variant of the profile plate 3 wherein the flat portion 16 of plate 3 is shaped differently.
  • each flat portion 16 of plates 3 is bounded on one side by a boundary surface connected to a space of the first sort and another boundary surface connected to a space of the second sort. There are therefore always two boundary surfaces per flat portion 16.
  • FIG 7. A heat exchanger assembled according to this construction is shown in figure 7.
  • this embodiment has three boundary surfaces of the first sort 22 as well as three boundary surfaces of the second sort 23.
  • the path of the fluid is hereby considerably shortened, this by a factor of about 3.
  • a greater number of boundary surfaces for example 8 or 10, this effect is intensified still further.
  • FIG 8 shows how the heat exchanger according to the embodiment of figure 7 is connected. It can be seen here that each of the boundary surfaces of the first sort is connected to a space 24 of the first sort which is partially closed off on its top side by a surface 25. In similar manner the boundary surfaces of the second sort 23 are closed off by a space of the second sort 26 which is partially closed off by a boundary surface 27.
  • figure 9 is shown how the spaces of the first sort 24 are connected to a chamber 15 of the first sort and also how the spaces of the second sort 26 are connected to the chamber 16 of the second sort.
  • the chamber 15 of the first sort 24 and the chamber 16 of the second sort 26 are separated by a surface 28 and enclosed by a housing 29.
  • FIG. 10 shows a diagram of a tumble dryer.
  • the tumble dryer designated integrally with 30 comprises a drying drum 31, a heating element 32 and a condenser 33, as is the case in conventional tumble dryers.
  • the tumble dryer according to the present invention is further provided with a recuperator or heat exchanger 34. It will be apparent that use can be made for recuperator 34 of a heat exchanger according to the present invention.
  • the diverse components are otherwise mutually connected by channels 35.
  • the recuperator serves herein to pre-heat the air which comes from the condenser and from which the moisture has been condensed, this with the cooling air coming from outside which is heated in the condenser and the heat of which is transferred at least partially in the recuperator to the air circulating in the tumble dryer.
  • the amount of heat which must be supplied to the air at heating element 32 in order to obtain sufficient evaporation in drying drum 31 is hereby greatly reduced.
  • recuperator 34 and the condenser 33 are combined into a separate unit which is shown in figure 11.
  • a unit 36 is herein divided by means of a substantially vertically extending surface 37 into a condenser 33 and a recuperator or preheating unit 34.
  • the connecting piece is herein adapted to guide the cooling air heated in condenser 33 in a U-shape to recuperator 34, while the connecting piece on the other side is adapted to guide the air leaving condenser 33 in a U-shape back to pre-heater 34.
  • connecting pieces 25 and 27 have the same shape as connecting pieces 25 and 27 of the normal embodiment of a heat exchanger shown in figure 8, but that the housing connecting thereto is provided with partitions 39 and is closed on its underside by a partition 38 in order to form the U-shaped guide.
  • the total assembly is of all relevant parts of the combination of a heat exchanger or recuperator and condenser for use in for instance a tumble dryer.
  • FIG 14 is shown another embodiment of plates 2 and 3 which'is a variant of the plate 3 shown in figure 6.
  • the plate 3 is extended beyond the flat portion 16 of profiled plate 3 and beyond the ribs placed hereon and formed by 17 and 18.
  • the thus formed extension 40 are also formed ribs 41 as well as openings 42.
  • At the corresponding locations of plate 2 recesses 42 are likewise arranged in the extensions 40 thereof.
  • figure 16 shows an embodiment of a top view of a further embodiment of a plate 3, wherein for correct distribution of the gases flowing through the heat exchanger the channels are embodied on one side of the heat exchanger at least partially diverging or converging, and diverging in the direction from outside toward the actual heat exchanger.
  • Such an embodiment is of particular importance in the case of large temperature gradients wherein, as a result of a temperature change caused by the fluids passing through, particularly when these fluids are gaseous, a considerable change in volume can occur.
  • this embodiment is particularly suitable for heat exchangers with large temperature gradients in the order of magnitude of several hundreds of K, for example as pre-heaters in gas burners. The invention therefore extends to such combinations of gas burners and heat exchangers.

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)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP96921155A 1995-06-30 1996-06-27 Heat exchanger with improved configuration Expired - Lifetime EP0835416B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1000706A NL1000706C2 (nl) 1995-06-30 1995-06-30 Warmtewisselaar met verbeterde configuratie.
NL1000706 1995-06-30
PCT/NL1996/000263 WO1997002461A1 (en) 1995-06-30 1996-06-27 Heat exchanger with improved configuration

Publications (2)

Publication Number Publication Date
EP0835416A1 EP0835416A1 (en) 1998-04-15
EP0835416B1 true EP0835416B1 (en) 1999-04-07

Family

ID=19761257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96921155A Expired - Lifetime EP0835416B1 (en) 1995-06-30 1996-06-27 Heat exchanger with improved configuration

Country Status (7)

Country Link
EP (1) EP0835416B1 (xx)
AT (1) ATE178707T1 (xx)
DE (1) DE69602025T2 (xx)
DK (1) DK0835416T3 (xx)
ES (1) ES2129976T3 (xx)
NL (1) NL1000706C2 (xx)
WO (1) WO1997002461A1 (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19648139A1 (de) * 1996-11-21 1998-05-28 Klingenburg Gmbh Gegenstromwärmetauscher
AU1267101A (en) * 1999-09-03 2001-04-10 Ryll Heizungs Gmbh Heat exchanger
GB0023427D0 (en) * 2000-09-23 2000-11-08 Smiths Industries Plc Apparatus
NL1030270C2 (nl) * 2005-10-26 2007-04-27 Level Holding Bv Werkwijze en inrichting voor het vervaardigen van een warmtewisselaar.
DE102010006277A1 (de) * 2010-01-25 2011-07-28 Joma-Polytec GmbH, 72411 Wärmetauscher, insbesondere zur Vorwärmung von Verbrennungsluft von Warmwasserheizkesseln
KR101428542B1 (ko) * 2013-01-18 2014-08-11 주식회사 경동나비엔 급기 예열기를 구비한 연소장치
NL2012548B1 (nl) * 2014-04-02 2016-02-15 Level Holding Bv Recuperator, waarvan de warmtewisselkanalen zich dwars op de lengterichting van het huis uitstrekken.
FR3069918B1 (fr) 2017-08-04 2020-01-17 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Echangeur de chaleur comprenant un element de distribution a canaux multiples
PL435267A1 (pl) * 2020-09-11 2022-03-14 Swiss Rotors Spółka Z Ograniczoną Odpowiedzialnością Moduł rekuperatora do systemów wentylacyjnych
NL2026943B1 (nl) 2020-11-20 2022-07-01 Level Holding Ii B V Recuperator met verbeterde kanaalconfiguratie

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB527585A (en) * 1938-04-16 1940-10-11 Gyoergy Jendrassik Plate heat exchange apparatus for gas turbines
DE2226056A1 (de) * 1972-05-29 1973-12-20 Licentia Gmbh Kondensator
FR2315674A1 (fr) * 1975-06-27 1977-01-21 Ferodo Sa Perfectionnements aux echangeurs de chaleur a plaques
DE3330254A1 (de) * 1983-08-22 1985-03-14 Farkas, György, Dipl.-Ing., 3340 Wolfenbüttel Waermetauscher fuer belueftung
EP0208042A1 (fr) * 1985-07-10 1987-01-14 Hamon-Industries Feuille thermoformée pour échangeur de chaleur gaz/gaz à plaques et échangeur en résultant
DE9115813U1 (xx) * 1991-12-20 1992-02-20 Balcke-Duerr Ag, 4030 Ratingen, De
DE4301296A1 (de) * 1993-01-20 1994-07-21 Philipp Dipl Ing Breitling Plattenwärmetauscher nach dem Gegenstromprinzip

Also Published As

Publication number Publication date
EP0835416A1 (en) 1998-04-15
DE69602025D1 (de) 1999-05-12
NL1000706C2 (nl) 1996-12-31
DK0835416T3 (da) 1999-10-18
ES2129976T3 (es) 1999-06-16
ATE178707T1 (de) 1999-04-15
DE69602025T2 (de) 1999-08-05
WO1997002461A1 (en) 1997-01-23

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