WO2007028465A1 - Echangeur thermique - Google Patents

Echangeur thermique Download PDF

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Publication number
WO2007028465A1
WO2007028465A1 PCT/EP2006/007555 EP2006007555W WO2007028465A1 WO 2007028465 A1 WO2007028465 A1 WO 2007028465A1 EP 2006007555 W EP2006007555 W EP 2006007555W WO 2007028465 A1 WO2007028465 A1 WO 2007028465A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
inlet
flow
exchanger according
flow channel
Prior art date
Application number
PCT/EP2006/007555
Other languages
German (de)
English (en)
Inventor
Hermann Knaus
Jens Supper
Original Assignee
Behr Gmbh & Co. Kg
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 Behr Gmbh & Co. Kg filed Critical Behr Gmbh & Co. Kg
Priority to EP06776519A priority Critical patent/EP1926963A1/fr
Priority to US12/065,690 priority patent/US20080245502A1/en
Priority to JP2008528365A priority patent/JP2009507162A/ja
Publication of WO2007028465A1 publication Critical patent/WO2007028465A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0462—Liquid cooled heat exchangers
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a heat exchanger, in particular an exhaust gas cooler of a motor vehicle, according to the preamble of claim 1.
  • the return of exhaust gas is known, with both a high-pressure exhaust gas recirculation and a low-pressure exhaust gas recirculation is possible.
  • the exhaust gas flow is cooled to temperatures of about 15O 0 C to 200 0 C and mixed with the intake air.
  • a cooling medium in the exhaust gas cooler a partial flow of the engine coolant is usually used at these temperatures of the cooled intake air.
  • the exhaust gas recirculation is the more effective, the lower the gas outlet temperatures are on the exhaust gas cooler. The same applies to other coolers as well as to heat exchangers in general.
  • a heat exchanger in particular for a motor vehicle, particularly preferably an exhaust gas cooler or charge air cooler, is provided, with at least one inlet and one outlet for the medium to be cooled or heated and / or the cooling or heating medium, wherein the inlet is designed such that a component of movement in the tangential direction with respect to the previous normal direction of movement and / or the main movement direction directly adjoining the inlet is introduced into the heat exchanger, preferably before the medium to be cooled or heated into the heat exchanger, in particular an inlet diffuser or boxes, entrance.
  • the flow pattern on entry into the heat exchanger is improved in that the flow separates less from the wall, in particular when the flow cross-section changes, and thus distributes itself more uniformly over the entire cross-section.
  • the peak flow velocities that typically occur in the middle can thus be reduced.
  • the flow rates in the outer areas are slightly increased.
  • a diffuser is provided or formed in the area of the inlet, which further improves the flow path in the inlet area.
  • a flow channel swirl body arrangement in particular a swirl body diffuser, is preferably provided.
  • the flow in the flow channel swirler assembly preferably receives a tangential component, wherein the tangential component at the outer circumference is preferably greater than in the middle.
  • the swirl body has repeating, uniformly distributed in the circumferential direction, serving as guide elements sections which are formed running in the inflow region in the flow direction and formed in the outflow obliquely to the flow direction in the inflow region running.
  • guide elements sections which are formed running in the inflow region in the flow direction and formed in the outflow obliquely to the flow direction in the inflow region running.
  • two to eight, in particular three to five, particularly preferably four, such sections are provided.
  • the flow channel swirl body arrangement or the swirl body is preferably made of a metal or a metal alloy, in particular aluminum or an aluminum alloy or stainless steel. This is preferably the same material as is used for the heat exchanger.
  • soldering or welding of the arrangement with the inlet or swirl body into the inlet is preferably carried out. This can be done in one operation with the soldering of the heat exchanger, so that the manufacturing costs, in particular with regard to the time required and the required energy can be reduced.
  • one or more components of the heat exchanger are formed of cast iron and a swirl body cast directly.
  • a swirl body is formed by punching out of a sheet metal or cast component.
  • the flow in the region of the inlet into a flow channel of the inlet region can take place in the tangential direction.
  • the flow channel can be both a simple tube and a diffuser.
  • a component in the direction of the longitudinal axis of the flow channel is preferably provided in order to further optimize the velocity distribution.
  • 1 is a schematic view of an exhaust gas cooler
  • 2a is a diagram illustrating the velocity distribution of the coolant flow in the individual channels in a conventional exhaust gas cooler, wherein the deviation of the mass flow distribution is shown by the uniform distribution in%,
  • 2b shows a diagram to illustrate the velocity distribution of the coolant flow in the individual channels in an exhaust gas cooler with a swirler in the inlet, wherein the deviation of the mass flow distribution from the DC distribution is shown in%
  • FIG. 3 is a perspective view of a flow channel swirler assembly
  • FIG. 4 is a perspective view of the swirl body of Fig. 3
  • 5 is a plan view of the flow channel swirler assembly of FIG. 3, FIG.
  • Fig. 6 is a schematic view of the tangential inflow into a diffuser
  • FIG. 7 is a side view of Fig. 6.
  • a heat exchanger 1 is provided, formed by an exhaust gas cooler, as it is used for the cooling of recirculated exhaust gas of a turbocharger.
  • a flow channel swirler assembly 3 is provided at the inlet 2, shown schematically in FIG. 1 by the circular, dotted area in front of the coolant ducts shown in section. as shown in Figures 3 to 5 in detail.
  • the flow channel swirl body arrangement 3 like the exhaust gas cooler, is made of stainless steel and is soldered to the exhaust gas cooler in the region of the inlet opening for the coolant, which takes place in the same working step as the soldering or welding of the individual components forming the exhaust gas cooler.
  • the flow channel swirl body arrangement 3 is designed as a diffuser 4 with a swirl body 5, wherein the cross section of the diffuser 4 widens slightly in the flow direction.
  • the swirl body 5 is provided, consisting of four guide elements 6, which are connected on the outside in one piece with the diffuser 4 and in the middle with each other along the longitudinal axis of the diffuser 4.
  • the four guide elements 6 are each formed the same and evenly over the circumference of the diffuser 4th distributed.
  • Each guide element 6 has an inflow region 7, which extends parallel to the normal flow direction, which runs parallel to the longitudinal axis of the diffuser 4.
  • each guide element 6 After the relatively short inflow region 7, which is formed rounded on the inflow side and in which each Leitele- ment 6 extends radially from the center of the diffuser 4 to the diffuser 4, the guide element 6 is formed bent.
  • the bending of the guide element 6 begins in a region in which the diameter of the diffuser 4 widens so that, in addition to or as a consequence of the tangential velocity component, a radial velocity component of the flow is also imposed, as a result of which the coolant is better distributed to the subsequent cross section .
  • each guide element 6 extends radially from the center of the diffuser 4 to the diffuser 4 (see Fig. 4).
  • the flow channel swirler assembly 3 results in a flow which also - at the wall surfaces substantially adjacent - spreads outwards and thus relatively evenly distributed over a larger cross-section.
  • the more uniform velocity distribution over the entire cross section significantly reduces the conventionally occurring peak flow velocities in the center, with the total flow rate of coolant being approximately the same.
  • the inlet 2 in the heat exchanger 1 is arranged laterally at one end of a flow channel 9 (shown here as a pipe with a larger cross-section than the feed line, although it may also be a diffuser), that the inflowing medium is automatically connected to a ner Tangentialkomponente is acted upon and the following flow path helically or helically widening forms, so that at the outlet from the flow channel there is a flow which also - at the wall surfaces substantially adjacent - spreads outwards and thus relatively evenly distributed over a larger cross-section ,
  • a component in the direction of the downstream flow channel may also be provided by appropriate arrangement of the inlet at the same time.

Landscapes

  • 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)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

La présente invention concerne un échangeur thermique (1) destiné en particulier à un véhicule automobile, comprenant au moins une entrée (2) et une sortie destinées à la substance à refroidir ou à chauffer et/ou à la substance de refroidissement ou de chauffage, l'entrée (2) étant conçue de sorte qu'une composante de mouvement de direction tangentielle par rapport à la direction de mouvement normale précédente et/ou par rapport à la direction de mouvement principale directement après l'entrée, est appliquée à la substance en circulation lors de l'entrée dans l'échangeur thermique (1). Un corps de turbulence (5) se trouve de préférence dans l'entrée (2).
PCT/EP2006/007555 2005-09-06 2006-07-31 Echangeur thermique WO2007028465A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06776519A EP1926963A1 (fr) 2005-09-06 2006-07-31 Echangeur thermique
US12/065,690 US20080245502A1 (en) 2005-09-06 2006-07-31 Heat Exchanger
JP2008528365A JP2009507162A (ja) 2005-09-06 2006-07-31 熱交換器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005042314A DE102005042314A1 (de) 2005-09-06 2005-09-06 Wärmetauscher
DE102005042314.0 2005-09-06

Publications (1)

Publication Number Publication Date
WO2007028465A1 true WO2007028465A1 (fr) 2007-03-15

Family

ID=37117644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/007555 WO2007028465A1 (fr) 2005-09-06 2006-07-31 Echangeur thermique

Country Status (5)

Country Link
US (1) US20080245502A1 (fr)
EP (1) EP1926963A1 (fr)
JP (1) JP2009507162A (fr)
DE (1) DE102005042314A1 (fr)
WO (1) WO2007028465A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013221408A (ja) * 2012-04-12 2013-10-28 Toyota Motor Corp Ｅｇｒガス冷却装置
DE102013207180A1 (de) 2013-04-19 2014-10-23 Behr Gmbh & Co. Kg Wärmeübertrager mit in einem Sammelkanal angeordneten Einsatz
RO129972B1 (ro) * 2014-08-29 2017-09-29 Viorel Micula Sistem modular de antrenare turbionară şi orientabilitate controlată a curenţilor de aer cald
DE102016116245A1 (de) 2016-08-31 2018-03-01 Areva Gmbh Strömungselement zur Erzeugung einer turbulenten Drallströmung und Wärmeübertragungsvorrichtung umfassend ein Strömungselement
EP3309494B1 (fr) * 2016-10-13 2021-04-28 HS Marston Aerospace Limited Échangeur de chaleur
EP3348947B1 (fr) * 2017-01-13 2020-11-04 HS Marston Aerospace Limited Échangeur de chaleur
US11709020B2 (en) * 2021-04-21 2023-07-25 Lennox Industries Inc. Efficient suction-line heat exchanger

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH306359A (de) * 1952-09-12 1955-04-15 Ag Alpura Einrichtung zum Entkeimen von Flüssigkeiten.
US3795259A (en) * 1971-07-07 1974-03-05 Stal Refrigeration Ab Device for evenly mixing and distributing a gas and liquid mixture
DD215155A1 (de) * 1983-05-05 1984-10-31 Zittau Ing Hochschule Turbulator und verfahren zur erhoehung des waermeuebergangs
EP0586747A1 (fr) * 1992-09-10 1994-03-16 The Procter & Gamble Company Système d'échangeur de chaleur avec turbulateur pour dispersions particules/liquide
JPH1162723A (ja) * 1997-08-21 1999-03-05 Toyota Autom Loom Works Ltd 排気ガス冷却装置
CA2219805A1 (fr) * 1997-10-31 1999-04-30 Kvaerner Chemetics Inc. Echangeur de chaleur a admission gazeuse amelioree
JP2000008967A (ja) * 1998-06-17 2000-01-11 Nissan Motor Co Ltd エンジンの排気還流装置
WO2004065876A1 (fr) * 2003-01-24 2004-08-05 Behr Gmbh & Co. Kg Echangeur thermique, notamment refroidisseur de gaz d'echappement pour automobiles

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19654366B4 (de) * 1996-12-24 2005-10-20 Behr Gmbh & Co Kg Strömungskanal, insbesondere für einen Abgaswärmeübertrager
DE19654363B4 (de) * 1996-12-24 2007-09-27 Behr Gmbh & Co. Kg Abgaswärmeübertrager für einen Verbrennungsmotor
DE19955939A1 (de) * 1999-11-20 2001-05-23 Volkswagen Ag Wärmetauscher zur Kühlung von Abgasen und ein Verfahren zur Herstellung eines Rohrs für einen Wärmetauscher
DE10007243C1 (de) * 2000-02-17 2001-04-26 Daimler Chrysler Ag Abgasrückführvorrichtung
DE60103047T2 (de) * 2001-06-27 2004-08-26 Siemens Ag Apparat für Abgasrückführung in einer Ansaugluftströmung
DE10144827A1 (de) * 2001-09-12 2003-03-27 Behr Gmbh & Co Abgaswärmeübertrager
GB2403605B (en) * 2003-06-21 2005-09-07 Elektro Magnetix Ltd Improvements to cooling system for dynamoelectric machines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH306359A (de) * 1952-09-12 1955-04-15 Ag Alpura Einrichtung zum Entkeimen von Flüssigkeiten.
US3795259A (en) * 1971-07-07 1974-03-05 Stal Refrigeration Ab Device for evenly mixing and distributing a gas and liquid mixture
DD215155A1 (de) * 1983-05-05 1984-10-31 Zittau Ing Hochschule Turbulator und verfahren zur erhoehung des waermeuebergangs
EP0586747A1 (fr) * 1992-09-10 1994-03-16 The Procter & Gamble Company Système d'échangeur de chaleur avec turbulateur pour dispersions particules/liquide
JPH1162723A (ja) * 1997-08-21 1999-03-05 Toyota Autom Loom Works Ltd 排気ガス冷却装置
CA2219805A1 (fr) * 1997-10-31 1999-04-30 Kvaerner Chemetics Inc. Echangeur de chaleur a admission gazeuse amelioree
JP2000008967A (ja) * 1998-06-17 2000-01-11 Nissan Motor Co Ltd エンジンの排気還流装置
WO2004065876A1 (fr) * 2003-01-24 2004-08-05 Behr Gmbh & Co. Kg Echangeur thermique, notamment refroidisseur de gaz d'echappement pour automobiles

Also Published As

Publication number Publication date
US20080245502A1 (en) 2008-10-09
DE102005042314A1 (de) 2007-03-08
JP2009507162A (ja) 2009-02-19
EP1926963A1 (fr) 2008-06-04

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