EP2494297A2 - Évaporateur à gaz d'échappement - Google Patents

Évaporateur à gaz d'échappement

Info

Publication number
EP2494297A2
EP2494297A2 EP10770804A EP10770804A EP2494297A2 EP 2494297 A2 EP2494297 A2 EP 2494297A2 EP 10770804 A EP10770804 A EP 10770804A EP 10770804 A EP10770804 A EP 10770804A EP 2494297 A2 EP2494297 A2 EP 2494297A2
Authority
EP
European Patent Office
Prior art keywords
flow channel
evaporator
plate
exhaust gas
flow
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.)
Withdrawn
Application number
EP10770804A
Other languages
German (de)
English (en)
Inventor
Steffen Brunner
Peter Geskes
Jens Holdenried
Klaus Irmler
Michael Schmidt
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and 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 and Co KG filed Critical Behr GmbH and Co KG
Publication of EP2494297A2 publication Critical patent/EP2494297A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • 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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • 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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/086—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning having one or more openings therein forming tubular heat-exchange passages
    • 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
    • F28D2021/0085—Evaporators
    • 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

Definitions

  • the present invention relates to an evaporator, in particular an exhaust gas evaporator for an exhaust system of a motor vehicle.
  • a heat energy recovery from exhaust gases of an internal combustion engine attained a steadily increasing importance in the field of automotive engineering.
  • the heat energy recovery by means of exhaust gas evaporator always moves into focus, in order to achieve an increase in efficiency in terms of the operation of the internal combustion engine.
  • heat is removed from the exhaust gas, which is supplied to a coolant or refrigerant, which is usually evaporated.
  • the heat energy extracted from the exhaust gas can be used for a downstream Clau8iu8 Rankine process, for example.
  • DE 10 2007 060 523 A1 of the applicant discloses an exhaust gas evaporator, wherein the exhaust gas evaporator has a sandwich construction aufwelst, in which exhaust gas levels and coolant levels are arranged alternately unmitt elbar side by side. It is the object of the invention to provide an improved evaporator with regard to its pressure stability, which is additionally easy and inexpensive to produce.
  • the evaporator which is suitable in particular for use as an exhaust gas evaporator for an exhaust system of a motor vehicle, has a plate structure with a plurality of stacked fluid-carrying plate elements for guiding a first fluid, wherein between two plate elements at least one rib, in particular a ribbed rib or corrugated fin, for guiding a second fluid, wherein a plate element comprises at least one flow channel covering cover plate and a Strömungskanalplatteetn- unit, wherein the Strömungskanalpfatteneinhett has at least one flow channel plate provided with flow channel plate to the first fluid from an inlet to an outlet respectively.
  • the flow skanalplatterv elnheit exactly one flow channel plate, wherein the flow channel plate is closed by a flow channel covering cover plate.
  • Egg- Such an embodiment represents the simplest and least expensive embodiment of a flow channel plate unit.
  • another cover element is provided, which is arranged between the exactly one flow channel plate and the at least one rib, so that the flow channel plate is arranged between the two cover plates.
  • the plate elements are arranged in the order cover plate - flow channel plate - cover plate, so that the two cover plates represent a good contact surface or a flat connection to the rib.
  • the flow channel plate unit comprises exactly two flow channel plates, which are arranged between two cover plates.
  • a channel structure is provided which has an increased pressure resistance.
  • the flow channels of the flow channel plates are preferably provided by an embossing process or a deep-drawing process.
  • Such methods are cost-effective and, in addition, different channel structures can be introduced into the flow channel plates by these methods.
  • An example of a meander-shaped channel structure is conceivable in which the first fluid, for example water or an alcohol mixture of a Clausius-Rankl-Krelsmoores is led from an inlet to an outlet.
  • the flow channels are formed by parallel slits, which are connected to one another by openings.
  • a particularly simple provided flow channel plate provided, which, depending on the application, in particular punched breakthroughs can be introduced at any point.
  • the flow channels of the flow channel plates are formed as openings, wherein the openings of the two flow channel plates Appen appen to form one or more flow channels.
  • the width of the overlapping apertures is formed differently, so that any burrs at the edges of the apertures do not hinder the fluidic connection of the flow channels with each other.
  • the openings are preferably provided by a stamping process, by laser cutting or water jet cutting.
  • the inlet and / or the outlet are arranged in a central region of the evaporator.
  • a "middle region” is understood to mean a region which extends from the geometric center of the evaporator in both longitudinal directions from 0 to 20 percent, preferably 0 to 10 percent of the total length of the evaporator. or the outlet is arranged laterally on the evaporator so as not to obstruct the flow of the second fluid, in particular of an exhaust gas of a motor vehicle
  • At least one, preferably each, flow channel plate comprises an element configured to produce an increased pressure loss.
  • the element here is preferably designed as a nozzle, aperture or as a labyrinth.
  • Flg. 1 schematically a view of a motor vehicle with an internal combustion engine and an exhaust system with an exhaust gas evaporator;
  • FIG. 2a to Fig. 2d schematically a view of different flow channel plates
  • FIG. 3 schematically a view of an exhaust gas evaporator according to the invention
  • Fig. 4 to Fig. 6 schematically a view of three further exemplary embodiments of a flow channel plate according to the invention
  • FIG. 7 and Flg. 8th schematically two embodiments of a plate element according to the invention with interposed corrugated fin;
  • FIG. 9 and Rg. 10 schematically a view of another Ausbowungsbei- game of a flow channel plate according to the invention and the flow channel plate in a detailed view;
  • the motor vehicle 1 shown in FIG. 1 comprises an internal combustion engine 2 with a downstream exhaust system 3, in which an exhaust gas evaporator 5, a catalytic converter 6, a middle damper damper 7 and a rear silencer 8 are arranged in an exhaust gas line 4 in this exemplary embodiment.
  • the motor vehicle 1 is provided with four wheels 9 (here only exemplarily numbered) on a road surface 10, which, according to the representation of FIG. 1, lies in the plane of the paper.
  • Such an exhaust gas evaporator 5 is, as shown in FIG.
  • the Rankine circuit 18 has at least one evaporator 5, an expander 1, a Rankine capacitor 20, and a pump 21.
  • the working medium of the Rankine cycle for example water, is lifted by the pump 21 to an elevated pressure level. Subsequently, the medium flows into the evaporator 5. From the evaporator, the working medium flows into the expander 1, in which it performs mechanical work and expands to a lower temperature and pressure level. From there it flows into a Rankine condenser 20, in which the working medium is liquefied. The pump 21 then sucks the working fluid again.
  • FIG. 2a to 2d show a first exemplary embodiment of flow channel plates 12a and 12b according to the invention which form a flow channel plate unit 12 in combination and a cover plate 11.
  • the flow channel plates 12a and 12b have a plurality of openings 17, wherein the width of the individual openings of the two plates is different, so that when stacking the plates (as shown in Flg. 2d) eventueile burrs do not impede the connection of the plates with each other unnecessarily ,
  • the two flow channel plates are covered at the top and bottom by a cover plate 11.
  • a unit of flow channel plate unit 12 and cover plate 11 is referred to as plate element 15.
  • the exhaust gas evaporator has an inlet 13 and an outlet 14, which, viewed in the longitudinal direction, are arranged approximately centrally.
  • the fluid for example water from a Clauslus-Rankine cycle, flows, starting from the inlet 13, into a collecting channel 13a, which is formed by the plate elements 15 and interposed intermediate elements 13b.
  • the fluid is distributed to the respective plate members and, after being collected in a second collection channel 14a, flows out of the evaporator through the outlet 14.
  • the second collection channel 14a is also formed from the respective plate members 15 and interposed intermediate members 14b.
  • the two collecting channels 13a and 14a are arranged laterally on the evaporator, so that the flow of the second fluid, in particular an exhaust gas of a motor vehicle, along the ribs 16 is not hindered.
  • FIGS. 4 to 6 schematically show further exemplary embodiments of a flow channel plate unit 12 according to the invention, wherein the unit 12 can either comprise two flow channel plates 12 a and 12 b by providing the individual flow channels 17 by a stamping process (as shown in FIGS. 2 a to 2 b). 2d) or from a single flow channel plate 12a, by providing the flow channels by a deep drawing process.
  • a pressure loss element 28 which is designated by "dp" is arranged in a feed line 25 to the channels 17.
  • a pressure loss element 28 of this type which is designed, for example, as a nozzle or aperture, is aimed set a pressure drop, which subsequently leads to a more even medium distribution, as will be described in more detail.
  • an exhaust gas evaporator has three zones, which differ in particular in that the working fluid has different phase states in the respective zones. While the working fluid W in a subcooling region 22 is mostly in liquid form and in an evaporation zone 23 mostly in the two-phase form, the working air is completely vaporized in an overheating zone 24. Due to the different flow velocities resulting therefrom, different pressure losses are formed, the pressure loss starting from a supercooling area increases.
  • the difference in pressure loss across the different zones 22 to 24 is lower in percentage terms, which results in a more even distribution of media.
  • the ratio between the inlet pressure loss and the pressure loss in the remaining flow channel 17 should be between OJ25 and 1 be.
  • a plurality of flow channels 17 can be connected in parallel in the overmeating area 24.
  • the mass flows are different levels.
  • a parallel arrangement of the flow channels 17, as shown in FIG. 6, is suitable.
  • 7 and 8 show two particularly preferred embodiments of an inventive exhaust gas evaporator, in the embodiment of FIG. 7, the flow channels 17 are pressed by means of a deep drawing process in the Strömungskanalpiatte 12 a. At the top, the channels 17 are closed by a first cover plate 11. This plate e also represents a flat connection to a rib, not shown. In order to provide even down to a flat surface to the rib 16, the flow channel plate 12a is inserted into a ttefierie on the edge further second cover plate 11.
  • this second Abdeckplatt e 11 omitted, so that the flow channel plate 12 a directly adjacent to the rib 16.
  • the embodiment according to FIG. 8 differs from the embodiment according to FIG. 7 essentially in that the flow channel plate unit 12 now comprises exactly two flow channel plates 12a and 12b. By stacking the two flow channel plates cavities are formed, which serve as flow channels 17. Optionally, also in this embodiment, the lower second cover plate 11 omitted.
  • the thicknesses of the cover plates 11 are preferably 0.5 mm to 0.8 mm.
  • the thickness of the at least one flow channel plate is preferably between 0.3 mm to 0.7 mm; that is, the at least one flow channel plate may be made thinner than the at least one cover plate.
  • FIG. 10 shows another embodiment of an exhaust gas evaporator according to the present invention.
  • the flow channels 17 are formed by parallel Steken which are communicatively connected by apertures 27. These breakthroughs are preferably provided by a stamping process by the punched openings or passages can be adjusted deflecting the flow channels ideal. Similar to the embodiment according to FIG. 5, two or more flow channels can be connected in parallel in the overheating region 24 in order to reduce the increased pressure loss.

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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un évaporateur, en particulier un évaporateur à gaz d'échappement (5) pour un système d'échappement (3) d'un véhicule à moteur (1), comprenant une structure sandwich à plaques constituée de plusieurs éléments en forme de plaques (15) empilés destinés à l'acheminement d'un premier fluide, au moins une ailette (18), en particulier une ailette ondulée, qui est destinée à l'acheminement d'un second fluide, étant placée entre deux éléments en forme de plaques, un élément en forme de plaque comprenant au moins un élément de recouvrement de canaux d'écoulement (11) et un ensemble plaque(s) à canaux d'écoulement (12), l'ensemble plaque(s) à canaux d'écoulement comprenant au moins une plaque à canaux d'écoulement (12a, 12b) pourvue de canaux d'écoulement (17), pour l'acheminement du premier fluide d'un orifice d'entrée (13) vers un orifice de sortie (14).
EP10770804A 2009-10-27 2010-10-21 Évaporateur à gaz d'échappement Withdrawn EP2494297A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009050889A DE102009050889A1 (de) 2009-10-27 2009-10-27 Abgasverdampfer
PCT/EP2010/065899 WO2011051163A2 (fr) 2009-10-27 2010-10-21 Évaporateur à gaz d'échappement

Publications (1)

Publication Number Publication Date
EP2494297A2 true EP2494297A2 (fr) 2012-09-05

Family

ID=43796869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10770804A Withdrawn EP2494297A2 (fr) 2009-10-27 2010-10-21 Évaporateur à gaz d'échappement

Country Status (5)

Country Link
US (1) US20130112382A1 (fr)
EP (1) EP2494297A2 (fr)
CN (1) CN102639952B (fr)
DE (1) DE102009050889A1 (fr)
WO (1) WO2011051163A2 (fr)

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DE102012204151A1 (de) 2012-03-16 2013-09-19 Behr Gmbh & Co. Kg Wärmeübertrager
USD735842S1 (en) * 2013-02-22 2015-08-04 The Abell Foundation, Inc. Condenser heat exchanger plate
USD736361S1 (en) * 2013-02-22 2015-08-11 The Abell Foundation, Inc. Evaporator heat exchanger plate
DE102014204259A1 (de) 2014-03-07 2015-09-10 MAHLE Behr GmbH & Co. KG Verfahren und Vorrichtung zum Herstellen eines Wärmetauschers
KR102304991B1 (ko) * 2015-04-21 2021-09-28 삼성디스플레이 주식회사 박막트랜지스터 어레이 기판 및 그의 제조방법, 박막트랜지스터 어레이 기판을 구비한 표시장치
US10371088B2 (en) 2016-02-15 2019-08-06 Ford Global Technologies, Llc Heat exchanger for a rankine cycle in a vehicle muffler
DE102016205353A1 (de) * 2016-03-31 2017-10-05 Mahle International Gmbh Stapelscheibenwärmetauscher
NL2019792B1 (en) * 2017-10-24 2019-04-29 Micro Turbine Tech B V Heat exchanger comprising a stack of cells and method of manufacturing such a heat exchanger

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Also Published As

Publication number Publication date
WO2011051163A2 (fr) 2011-05-05
CN102639952B (zh) 2014-11-05
DE102009050889A1 (de) 2011-04-28
US20130112382A1 (en) 2013-05-09
WO2011051163A3 (fr) 2011-07-07
CN102639952A (zh) 2012-08-15

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