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EP2926077B1 - Gaswärmetauscher, im besonderen für abgase eines motors - Google Patents

Gaswärmetauscher, im besonderen für abgase eines motors Download PDF

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Publication number
EP2926077B1
EP2926077B1 EP13801494.9A EP13801494A EP2926077B1 EP 2926077 B1 EP2926077 B1 EP 2926077B1 EP 13801494 A EP13801494 A EP 13801494A EP 2926077 B1 EP2926077 B1 EP 2926077B1
Authority
EP
European Patent Office
Prior art keywords
tubes
tube
transverse
coolant
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.)
Active
Application number
EP13801494.9A
Other languages
English (en)
French (fr)
Other versions
EP2926077A1 (de
Inventor
Inigo TOLOSA ECHARRI
Rosa PUERTOLAS REBOLLAR
Juan Carlos De Francisco Moreno
Dario PENA SANCHEZ
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.)
Valeo Termico SA
Original Assignee
Valeo Termico SA
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 Valeo Termico SA filed Critical Valeo Termico SA
Publication of EP2926077A1 publication Critical patent/EP2926077A1/de
Application granted granted Critical
Publication of EP2926077B1 publication Critical patent/EP2926077B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • 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
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F2001/027—Tubular elements of cross-section which is non-circular with dimples

Definitions

  • the present invention relates to a heat exchanger for gas, in particular for the exhaust gases of an engine.
  • the invention is particularly applicable in heat exchangers of engine exhaust gas recirculation (EGRC).
  • EGRC engine exhaust gas recirculation
  • the two heat exchanging media are separated by a wall.
  • EGR exchangers on the market is a metal heat exchanger typically made of stainless steel or aluminum.
  • EGR heat exchanger there are two types: a first type consists of a housing inside which there is a bundle of parallel tubes for the passage of gases, the refrigerant circulating in the housing, outside tubes, and the second type consists of a series of parallel plates which constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate between two plates, in alternating layers, with the possibility of include fins to improve heat exchange.
  • the assembly between the tubes and the housing can be of different types.
  • the tubes are fixed at their ends between two support plates connected to each end of the housing, the two support plates having a plurality of orifices for the installation of the respective tubes.
  • connection means with the recirculation line which may consist of a V-shaped connection or a peripheral collar or flange, depending on the design of the recirculation line in which is connected the exchanger.
  • the peripheral collar can be assembled with a gas tank, so that the gas tank is a part intermediate between the housing and the collar, or the collar can be assembled directly to the housing.
  • EGR exchangers In both types of EGR exchangers, most of their components are metallic, so that they are assembled by mechanical means and then oven-welded or arc-welded or laser-welded to ensure the proper sealing required this application. In some cases, they may also include some plastic components, which may have a single function or several functions integrated in one piece.
  • One of the conditions to be fulfilled by the EGR heat exchangers is to maintain an appropriate distribution of the coolant flow to ensure good efficiency and sufficient durability. If the distribution of the coolant flow is not good enough, the efficiency may decrease and may appear a boiling phenomenon, which will affect the durability of the heat exchanger subjected to thermal fatigue.
  • the distribution of the coolant flow depends fundamentally on the location of the inlet and outlet conduits of the refrigerant.
  • a general recommendation is that the coolant outlet duct must be located in the upper part of the exchanger, while the coolant inlet duct must be located opposite in the lower part of the exchanger, and the greater the distance between the two inlet and outlet conduits of the coolant, the better the distribution of the coolant.
  • Licences JP2000292089 and JP2000283666 disclose tube bundle heat exchangers which comprise a plurality of plate-shaped cross deflectors disposed within a circular section housing.
  • the design of said baffles is very similar to the configuration of the support plates at both ends of the housing; the diameter of these baffles is equal to the inside diameter of the housing and they include openings to allow the refrigerant fluid to pass through.
  • the positions of said passage openings in the different deflectors are distributed alternately.
  • the patent KR20080013457 discloses a tube bundle heat exchanger which comprises a helical shaped baffle inserted along a circular section housing.
  • the patent US2005161206 A1 discloses a stacked plate heat exchanger whose coolant inlet and outlet conduits are located at opposite ends but in the same side face of the housing. Each plate includes a transverse protuberance embossed in the lateral entry zone of the refrigerant fluid, as well as a plurality of shorter protuberances stamped along the plate, capable of distributing the refrigerant fluid from its lateral entry zone through any the surface of the plates.
  • the patent US2008169093 A1 discloses a stacked plate heat exchanger having the coolant inlet and outlet conduits at opposite ends and opposite sides of the exchanger housing.
  • Each plate includes a transverse protuberance embossed in the lateral entry zone of the refrigerant fluid, as well as a plurality of shorter protuberances stamped along the plate, capable of distributing the refrigerant fluid from its lateral entry zone through any the surface of the plates.
  • the objective of the gas heat exchanger, in particular the exhaust gases of an engine, according to the present invention is to solve the disadvantages that the exchangers known in the art present by proposing a heat exchanger which allows improve the distribution of the flow of refrigerant through it while avoiding the use of deflectors.
  • the gas heat exchanger in particular for the exhaust gas of an engine, is of the type which comprises a plurality of parallel tubes, arranged inside a housing, through which the gases circulate. cooling by heat exchange with a cooling fluid and wherein the refrigerant inlet and outlet conduits are each disposed at an opposite end of the housing, preferably on the same side of said housing; each tube comprises a protuberance facing the direction of the gases, said tubes being capable of being stacked together so that the protuberances of the respective tubes define a barrier, in the form of a baffle, for creating a predetermined path capable of ensuring an appropriate distribution of the flow of refrigerant fluid from its inlet to its exit around the tubes and along the exchanger; the parallel tubes have a substantially rectangular section, each tube comprising a protuberance transverse to the direction of the gases, so that said transverse protuberances of the respective tubes define a substantially vertical transverse barrier, it is characterized in that the tubes are oriented from whereby the upper half of the tube bundle has respective
  • the above-mentioned deflecting effect is obtained by contacting the protuberances of the respective tubes, so that the barrier or deflector obtained forces the circulation of the refrigerant fluid so that it flows along a path suitable for obtaining a good distribution of the refrigerant fluid.
  • the deflectors or cross barriers created force the flow of refrigerant fluid to fill the inside of the exchanger in all directions, but with an appropriate distribution of the refrigerant flow from the inlet to the coolant outlet, thus avoiding a direct flow of refrigerant flow from the inlet to the outlet thereof.
  • the flow generated within the housing has a "Z" shape, which differs completely from the refrigerant flow paths in the stacked plate heat exchangers known in the art that utilize a transverse protuberance.
  • each tube comprises a single transverse protuberance located on one of its faces.
  • each tube comprises two transverse protuberances located on the opposite faces of the tube.
  • each tube comprises a plurality of projections, preferably of circular section, distributed along the tube, intended for support and assembly between the adjacent tubes, which in turn delimit a predetermined space between the tubes for the passage refrigerant.
  • the heat exchanger 1 for gas in particular for the exhaust gases of an engine, according to the present invention is of the type which comprises a plurality of parallel tubes 2 of substantially rectangular section, arranged inside a housing 3, through which circulate the gases to be cooled by heat exchange with a cooling fluid. Similarly, it comprises two inlet ducts 4 and 5 of coolant outlet arranged at the opposite ends and in one and the same side of said casing 3.
  • each tube 2 comprises a transverse protuberance 6 with respect to the direction of the gases, situated, starting from one of its ends, at a distance of approximately one-third of the length of the tube.
  • the tubes 2 may comprise a single transverse protuberance 6 located on one of their faces (see Figure 3 ) or may comprise two transverse protuberances 6 located on the opposite faces of the tube 2 (see Figure 4 ).
  • Each tube 2 also comprises a plurality of projections 7 of circular section distributed along the tube 2, intended for support and assembly between the adjacent tubes 2, which in turn delimit a predetermined space between the tubes 2 for the passage refrigerant.
  • the tubes 2 are assembled by stacking one on the other and oriented so that the upper half of the tube bundle 2 has its respective transverse protuberances 6 located at a distance from to about a third of the length of the tube 2 relative to the gas inlet, thereby defining a first vertical transverse barrier 6a, while the lower half of the tube bundle 2 has its respective transverse protuberances 6 at a distance of approximately two thirds of the length of the tube 2 relative to the gas inlet, thus defining a second vertical transverse barrier 6b.
  • the two transverse barriers 6a and 6b define a "Z" -shaped path for the coolant flow, as shown by the arrows shown in FIG. Figure 6 .
  • the coolant inlet duct 4 is situated in the upper part at one end of a lateral face of the casing 3, upstream of said first transverse barrier 6a, while the refrigerant outlet duct 5 is located in the lower part of the opposite end of the same side face of the housing 3, downstream of said second transverse barrier 6b.
  • the deflecting effect is obtained thanks to the contact between the transverse protuberances 6 of the respective tubes 2, so that the deflectors or transverse barriers 6a and 6b created force the flow of refrigerant fluid to fill the inside of the exchanger 1 in all the directions, but with an appropriate distribution of the refrigerant flow from the inlet 4 to the outlet 5 of refrigerant, thus avoiding a direct flow of coolant flow from the inlet to the outlet thereof.
  • the flow generated within the housing has a "Z" shape, which differs completely from the refrigerant flow paths in the stacked plate heat exchangers known in the art that utilize a transverse protuberance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (4)

  1. Gaswärmetauscher (1), insbesondere für die Abgase eines Motors, umfassend eine Vielzahl von parallelen Röhren (2), die innerhalb eines Gehäuses (3) angeordnet sind, durch die die durch Wärmeaustausch mit einem Kühlfluid zu kühlenden Gase zirkulieren, und bei dem die Eingangs- (4) und Ausgangsleitungen (5) von Kältefluid jeweils an einem gegenüberliegenden Ende des Gehäuses (3), vorzugsweise auf einer selben Seite des Gehäuses (3) angeordnet sind, bei dem jede Röhre (2) eine Ausstülpung (6) umfasst, die der Richtung der Gase gegenüberliegt, wobei die Röhren (2) geeignet sind, durch Übereinanderstapeln zusammengefügt zu werden, so dass die Ausstülpungen (6) der jeweiligen Röhren (2) eine Barriere (6a, 6b) definieren, die einen Abweiser darstellt und dazu bestimmt ist, eine vorbestimmte Bahn zu erzeugen, die geeignet ist, eine geeignete Verteilung des Kältefluidstroms von seinem Eingang (4) bis zu seinem Ausgang (5) um die Röhren (2) und entlang des Wärmetauschers (1) zu gewährleisten, und bei dem die parallelen Röhren (2) einen im Wesentlichen rechteckigen Querschnitt aufweisen, wobei jede Röhre (2) eine Ausstülpung (6) quer zur Richtung der Gase umfasst, so dass die Querausstülpungen (6) der jeweiligen Röhren (2) eine im Wesentlichen vertikale quer verlaufende Barriere (6a, 6b) bilden, dadurch gekennzeichnet, dass die Röhren (2) derart ausgerichtet sind, dass die obere Hälfte des Bündels von Röhren (2) ihre jeweiligen Querausstülpungen (6) in einem Abstand von ungefähr einem Drittel der Länge der Röhre (2) in Bezug zum Eintritt der Gase befindlich aufweist, wodurch eine erste vertikale quer verlaufende Barriere (6a) gebildet wird, während die untere Hälfte des Bündels von Röhren (2) ihre jeweiligen Querausstülpungen (6) in einem Abstand von ungefähr zwei Drittel der Länge der Röhre (2) in Bezug zum Eintritt der Gase befindlich aufweist, wodurch eine zweite vertikale quer verlaufende Barriere (6b) definiert wird, so dass die zwei quer verlaufenden Barrieren (6a, 6b) eine "Z-förmige" Bahn für den Kältefluidstrom definieren, wobei die Eingangsleitung (4) von Kältefluid in dem oberen Teil an einem Ende einer Seitenfläche des Gehäuses (3) stromaufwärts zur ersten quer verlaufenden Barriere (6a) angeordnet ist, und die Ausgangsleitung (5) von Kältefluid in dem unteren Teil des gegenüberliegenden Endes auf derselben Seitenfläche des Gehäuses (3) stromabwärts zu der zweiten quer verlaufenden Barriere (6b) angeordnet ist.
  2. Wärmetauscher (1) nach Anspruch 1, bei dem jede Röhre (2) eine einzige Querausstülpung (6), die sich auf einer seiner Flächen befindet, umfasst.
  3. Wärmetauscher (1) nach Anspruch 1, bei dem jede Röhre (2) zwei Querausstülpungen (6) umfasst, die sich auf gegenüberliegenden Seiten der Röhre (2) befinden.
  4. Wärmetauscher (1) nach Anspruch 1, bei dem jede Röhre (2) eine Vielzahl von Vorsprüngen (7), vorzugsweise mit kreisförmigem Querschnitt, umfasst, die entlang der Röhre (2) verteilt und zur Abstützung und Montage der aneinandergrenzenden Röhren (2) aneinander bestimmt sind, die ihrerseits einen vorbestimmten Raum zwischen den Röhren (2) für den Durchgang des Kältefluids begrenzen.
EP13801494.9A 2012-11-28 2013-11-22 Gaswärmetauscher, im besonderen für abgase eines motors Active EP2926077B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201231852A ES2463616B1 (es) 2012-11-28 2012-11-28 Intercambiador de calor para gases, en especial de los gases de escape de un motor
PCT/EP2013/074480 WO2014082931A1 (fr) 2012-11-28 2013-11-22 Échangeur thermique pour gaz, en particulier pour les gaz d'échappement d'un moteur

Publications (2)

Publication Number Publication Date
EP2926077A1 EP2926077A1 (de) 2015-10-07
EP2926077B1 true EP2926077B1 (de) 2018-12-19

Family

ID=49724547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13801494.9A Active EP2926077B1 (de) 2012-11-28 2013-11-22 Gaswärmetauscher, im besonderen für abgase eines motors

Country Status (6)

Country Link
US (1) US20150308387A1 (de)
EP (1) EP2926077B1 (de)
KR (1) KR101694083B1 (de)
CN (1) CN104981678B (de)
ES (2) ES2463616B1 (de)
WO (1) WO2014082931A1 (de)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
USD840958S1 (en) * 2016-11-15 2019-02-19 Borgwamer Emissions Systems Spain, S.L.U. Shaped tube with a pattern
CN107246333A (zh) * 2017-06-23 2017-10-13 浙江邦得利环保科技股份有限公司 无外壳的egr冷却器
KR20200006779A (ko) * 2018-07-11 2020-01-21 현대자동차주식회사 Egr 쿨러
EP4491992A1 (de) * 2023-07-13 2025-01-15 Valeo Systemes Thermiques Flachrohr

Citations (1)

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Publication number Priority date Publication date Assignee Title
FR2936043A1 (fr) * 2008-09-12 2010-03-19 Valeo Systemes Thermiques Echangeur de chaleur a tubes

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JP4143966B2 (ja) * 2003-02-28 2008-09-03 株式会社ティラド Ｅｇｒクーラ用の偏平チューブ
JP2005036739A (ja) * 2003-07-16 2005-02-10 Hino Motors Ltd Ｅｇｒクーラ
JP4602714B2 (ja) * 2004-08-19 2010-12-22 株式会社ティラド 熱交換器
CA2503424A1 (en) * 2005-04-01 2006-10-01 Dana Canada Corporation Stacked-tube heat exchanger
US8272431B2 (en) * 2005-12-27 2012-09-25 Caterpillar Inc. Heat exchanger using graphite foam
JP5145718B2 (ja) * 2006-02-03 2013-02-20 株式会社デンソー 熱交換器
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JP2010048536A (ja) * 2008-08-25 2010-03-04 Denso Corp 熱交換器
FR2935475B1 (fr) * 2008-08-27 2012-12-07 Valeo Systemes Thermiques Echangeur de chaleur pour le refroidissement d'un fluide, en particulier des gaz d'echappement recircules d'un moteur thermique
ES2394406B1 (es) * 2009-11-18 2013-10-23 Valeo Térmico, S.A. Intercambiador de calor para gases, en especial de los gases de escape de un motor.
DE102010003514A1 (de) * 2010-03-31 2011-10-06 Behr Gmbh & Co. Kg Wärmetauscher

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Publication number Priority date Publication date Assignee Title
FR2936043A1 (fr) * 2008-09-12 2010-03-19 Valeo Systemes Thermiques Echangeur de chaleur a tubes

Also Published As

Publication number Publication date
ES2463616B1 (es) 2015-03-04
CN104981678A (zh) 2015-10-14
CN104981678B (zh) 2018-11-27
KR20150088872A (ko) 2015-08-03
KR101694083B1 (ko) 2017-01-06
US20150308387A1 (en) 2015-10-29
EP2926077A1 (de) 2015-10-07
ES2716569T3 (es) 2019-06-13
WO2014082931A1 (fr) 2014-06-05
ES2463616A1 (es) 2014-05-28

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