WO2011117222A1 - Dispositif comprenant un corps support de catalyseur et un générateur thermoélectrique disposés dans un carter - Google Patents

Dispositif comprenant un corps support de catalyseur et un générateur thermoélectrique disposés dans un carter Download PDF

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Publication number
WO2011117222A1
WO2011117222A1 PCT/EP2011/054306 EP2011054306W WO2011117222A1 WO 2011117222 A1 WO2011117222 A1 WO 2011117222A1 EP 2011054306 W EP2011054306 W EP 2011054306W WO 2011117222 A1 WO2011117222 A1 WO 2011117222A1
Authority
WO
WIPO (PCT)
Prior art keywords
elements
exhaust gas
housing
face
tubular
Prior art date
Application number
PCT/EP2011/054306
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
Sigrid Limbeck
Original Assignee
Emitec Gesellschaft Für Emissionstechnologie Mbh
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 Emitec Gesellschaft Für Emissionstechnologie Mbh filed Critical Emitec Gesellschaft Für Emissionstechnologie Mbh
Publication of WO2011117222A1 publication Critical patent/WO2011117222A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2889—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with heat exchangers in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F01N5/025—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat the device being thermoelectric generators
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • F28D7/06—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 having a single U-bend
    • 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
    • F28D7/1669—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 the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • 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 present invention relates to a device for an exhaust system of an internal combustion engine, wherein disposed within a housing of the device, a Katalysatoranikör and a thermoelectric generator for generating electrical energy from the heat difference of an exhaust gas and a cooling medium are.
  • thermoelectric generator The exhaust gas from an internal combustion engine of a motor vehicle has thermal energy, which is to be converted into electrical energy by means of the thermoelectric generator, for example.
  • thermoelectric generator To fill a battery or other energy storage and / or electrical consumers to supply the required energy directly. This is available for the operation of the motor vehicle energy to a greater extent.
  • the use of a thermoelectric generator further increases the energy efficiency of an internal combustion engine.
  • thermoelectric generator usually has a plurality, possibly modular, thermoelectric transducer elements.
  • Thermoelectric materials are of a type that can effectively convert thermal energy into electrical energy (Seebeck effect) and vice versa (Peltier effect).
  • the Seebeck effect is based on the phenomenon of converting thermal energy into electrical energy and is used to generate thermoelectric energy.
  • the Peltier effect is the reversal of the Seebeck effect and a phenomenon that accompanies heat adsorption and is related to a flow of current through different materials.
  • the Peltier effect has already been proposed, for example for thermoelectric cooling.
  • thermoelectric conversion elements preferably have a multiplicity of thermoelectric elements which are positioned between a so-called warm side and a so-called cold side.
  • Thermoelectric elements include z. B. at least two semiconductor cuboid (p- and n-doped), which are mutually connected on their top and bottom (towards the hot side or cold side) with electrically conductive bridges. Ceramic plates or ceramic coatings and / or similar materials serve to insulate the metal bridges and are thus preferably arranged between the metal bridges. If a temperature gradient is provided on both sides of the semiconductor block, a voltage potential forms. Heat is absorbed on one contact point (hot side), the electrons of one side reaching the higher-lying conduction band of the following cuboid. On the other hand, the electrons can now release energy to return to a lower energy level (cold side). Thus, with a corresponding temperature gradient, a current flow can occur.
  • thermoelectric generators In the design of thermoelectric generators and their use in a motor vehicle various challenges are to be overcome. Among other things, good heat transfers must be provided within the thermoelectric conversion elements, so that the present temperature differences can be efficiently converted for conversion into electrical energy. Furthermore, in a working under various load conditions exhaust system of an internal combustion engine to provide a suitable temperature level for the thermoelectric elements. From these points of view, the arrangement of the thermoelectric elements within such a device or an exhaust system is to be observed.
  • Object of the present invention is therefore to solve the problems described with reference to the prior art, at least partially.
  • a device should be specified which has a high efficiency with respect to the use of waste heat or the recuperation of thermal energy into electrical energy.
  • the device according to the invention should be made lighter by a special construction of the thermoelectric conversion elements than comparable thermoelectric generators composed of plate elements. are set.
  • this device should be installed in an existing vehicle concept without far-reaching changes and be particularly effective.
  • the inventive device for an exhaust system of an internal combustion engine comprises at least one housing, wherein the housing has a longitudinal axis and a first end side and a second end side. Further, the housing comprises an inlet and an outlet for an exhaust gas and at least one inlet and an outlet for a cooling medium.
  • the housing of the device further comprises a flow-through exhaust gas catalyst carrier body having an outer peripheral surface and an inner peripheral surface is arranged. The exhaust gas enters the housing via the first end face and flows radially through the inner circumferential surface towards the outer peripheral surface toward the catalyst carrier body. The exhaust gas leaves the housing via the second end face.
  • a plurality of tube elements having outer sides and inner sides is arranged, wherein the tube elements are arranged parallel to the longitudinal axis along the outer peripheral surface and the outer sides are exposed to exhaust gas and the inner sides of the cooling medium.
  • thermoelekt- symbolize elements are arranged between the outside and inside of the tubular elements.
  • the cooling medium flowing through the tubular elements here is liquid in particular and preferably comprises substantially water, whereby in particular especially long-chain carbon compounds, so oils or lubricants are used.
  • the device or the housing is in particular round, oval or polygonal and has an otherwise cylindrical shape along the longitudinal axis.
  • the catalyst carrier body is in particular formed by at least partially structured metal foils which are wound, wound and / or stacked.
  • the catalyst carrier body is arranged inside the housing along the longitudinal axis and has an outer peripheral surface and an inner circumferential surface which extend substantially parallel to the longitudinal axis and in particular coaxially with one another.
  • the inner circumferential surface is fluidically connected in particular directly to the inlet, so that the catalyst carrier body can be flowed through by the exhaust gas radially from the inner circumferential surface to the outer circumferential surface.
  • the tube elements form a plurality of parallel flow paths for the cooling medium.
  • the tubular elements extend parallel at least partially to the longitudinal axis and at least partially along the outer peripheral surface of the catalyst carrier body and are overflowed (transversely) by the exhaust gas flowing radially out of the catalyst carrier body.
  • the exhaust gas flows out of the catalyst carrier body in an annular channel receiving the tube elements, which encloses the outer peripheral surface of the catalyst carrier body accordingly.
  • the exhaust gas is deflected again and flows through the annular channel along the tubular elements in the direction of the second end face.
  • the radially effetströmbare catalyst carrier body of the present invention corresponds in particular to the structure of the radial catalysts according to WO 02/40838 AI or WO 02/81879 Al, which are hereby incorporated by reference in its entirety.
  • Radial catalyst carrier bodies with heating elements which can improve the cold start behavior of the catalyst carrier body according to a particularly advantageous embodiment can also be used in particular.
  • a heating element for. B. arranged in the form of a heating catalyst upstream of the inlet of the housing or within the catalyst in the Torismekör existing interior space inside the inner peripheral surface.
  • the catalyst carrier body is preferably made cylindrical and has in its interior a cavity through which the exhaust gas, coming from the inlet of the housing, can flow. There, the exhaust gas is possibly deflected by steering means, so that it flows through the catalyst carrier body in the radial direction to the outside and leaves over the outer circumferential surface of the catalyst carrier body.
  • the tube elements are preferably arranged directly on or at a small distance from the outer peripheral surface of the catalyst carrier body. These run parallel to the longitudinal axis and in particular are distributed uniformly over the outer peripheral surface of the catalyst carrier body.
  • the tubular elements are preferably arranged within the annular channel, which preferably surrounds the catalyst carrier body in its entirety and is arranged between the outer circumferential surface of the catalyst carrier body and the inner wall of the housing.
  • the annular channel is designed to be closed in preference to the inlet of the exhaust gas, so that the exhaust gas is exhausted out of the catalyst carrier body via the annular channel during previous and / or simultaneous flow around the pipe elements in the direction of the outlet of the exhaust gas.
  • the housing and the pipe elements are provided in particular with guide elements for the exhaust gas, so that the lowest possible pressure loss due to turbulence or other flow resistance is achieved in the exhaust stream.
  • a further preferred embodiment of the device includes that the tube elements penetrate the catalyst carrier body at least partially and in particular over its entire axial extent.
  • the catalyst carrier body has for receiving these tube elements in particular holes or recesses into which the intended designs of the tubular elements can be used.
  • an arrangement of the tube elements is designed at least in two stages, this means in particular that the cooling medium is introduced via at least two inlets or outlets in the arrangement of the tubular elements.
  • the cooling media can be designed differently but also similar.
  • This preferred embodiment ensures that the pipe elements can be designed in particular for at least two different temperature ranges, which can be present due to the special arrangement of the individual pipe elements within the housing.
  • the arrangement of the tubular elements may in particular comprise a plurality of annular regions which surround the catalyst carrier body.
  • the further outwardly or inwardly arranged tubular elements each form a group, which is acted upon in each case via a common inlet or outlet with the cooling medium.
  • the correspondingly different temperature ranges can be used particularly effectively by correspondingly different design of the thermoelectric elements within the tubular elements.
  • the energy efficiency of a thermoelectric generator or the device according to the invention is further increased.
  • the catalyst carrier body may have different configurations, in particular with regard to its axial and / or radial extent.
  • the wall thicknesses of the channel walls can differ from each other here in a single area.
  • partial apertures and swirling elements may be provided which can cause the exhaust gas to mix and improve the efficiency of the catalyst carrier body in terms of the conversion of chemical compounds contained in the exhaust gas.
  • the catalyst support body has in particular at least in some areas a catalytically active coating and is preferred as an oxidation catalyst or used as a three-way catalyst.
  • thermoelectric conversion elements can be used efficiently, since the temperature of the exhaust gas in terms of the preferred temperature difference (between the cooling medium and the exhaust gas) is possible.
  • an injection for a reaction medium can be provided upstream of the catalyst carrier body so that a catalytic reaction is generated directly by the catalyst carrier body, by which the temperature of the catalyst carrier body and of the exhaust gas flowing through it is increased so significantly that the efficiently usable by the thermoelectric conversion elements Temperature range is reached as quickly as possible.
  • the catalyst support body may also areas of the inner wall of the housing or areas of the annular channel and in particular the tubular elements are provided with a catalytically active coating, so that on the one hand as complete as possible implementation of the pollutants in the exhaust gas is achieved and on the other hand a large amount of thermal energy in Consequence of the exothermic catalytic reaction of the exhaust gas can be implemented by the thermoelectric conversion elements.
  • the thermoelectric elements in the tube elements of the device are disc-shaped and stacked.
  • the outer sides and inner sides of the tubular elements and the thermoelectric elements arranged therebetween are bonded together in a material-locking manner.
  • the tube elements each have a first end and a second end, which are electrically contacted by at least one tube element plate.
  • modules for a thermoelectric generator are preferably used, which have at least one inner tube and an outer tube arranged around the inner tube around outer tube, and between this inner and outer tube arranged thermoelectric elements.
  • the inner and outer tubes are each electrically insulated from the thermoelectric elements.
  • thermoelectric elements are arranged within the tubular element, which are thermally in contact via the inner tube and the outer tube of the tubular element with the exhaust gas flowing around the outside of the tubular element.
  • the inner tube and the outer tube of the tubular element is preferably metallic and in particular has a substantially similar cross-section, the z. B.
  • thermoelectric elements are electrically connected to electrical contacts provided at the first end and at the second end.
  • an electrical current flow can be generated starting from the respective thermoelectric element to voltage potentials outside of the tubular element.
  • This electrical current flow can thus be forwarded to a battery or a consumer.
  • the electrically conductive contacts form a seal between the outer tube and the inner tube of the tubular element. This means in particular that the electrically conductive contacts in the areas in which they are arranged between inner tube and outer tube, a seal against the Cooling medium and / or form the exhaust gas, so that they can not penetrate into the space between the inner tube and outer tube. This reliably prevents corrosion or short-circuiting of the thermoelectric elements.
  • the pipe elements are made cohesively. This means that the inner and outer tube of the tubular element is dielectrically separated from the electrically conductive bridges or conductor tracks of the thermoelectric module integrated in the tube. At the same time a cohesive connection between the dielectric layer and the tube or between the interconnect bridge and the dielectric layer is provided. By means of this connection between (at least) inner tube, dielectric, conductor track, semiconductor elements and outer tube, the temperature differential between exhaust gas and cooling medium required for particularly efficient utilization can be converted by the thermoelectric converter elements.
  • the tube elements of the device are accommodated in a respective tubular element plate on the first end side and a second end side, wherein the inlet is arranged on the second end side and the outlet on the first end side.
  • the cooling medium flows through the housing only in one flow direction, namely preferably from the second end side to the first end side, ie in countercurrent with respect to the exhaust gas.
  • a tubular element plate for use in a device according to the invention.
  • the tube element plate has openings for receiving tubular elements and further channels for the fluidic connection of at least one inlet and / or outlet for a cooling medium with the tube elements.
  • first contacts are provided which connect at least a first end of at least one tubular element electrically conductively connected to a first electrical conductor.
  • additional second contacts are provided for electrically conductive connection of a second end of at least one tubular element with a second electrical conductor, wherein the second contacts are electrically isolated from the first contacts.
  • This tube element plate serves on the one hand for receiving the pipe demesne and their arrangement and fixation within the housing and on the other hand for providing an electrical connection of at least one pipe element with an electrical conductor outside the housing ses.
  • the tube element plate according to the invention has a first end face and a second end face and a peripheral peripheral surface. In this case, at least one end face has openings into which the pipe elements extend.
  • channels are provided within the tubular element plate, which receive the cooling medium from the tube elements and connect fluidically with the inlet or outlet.
  • the tubular element plate has at least electrically conductive first contacts, which are electrically conductively connected to the respectively electrically contactable first and second ends of the tubular elements and can conduct an electrical current flow to the outside of the housing.
  • the tubular element plate has in particular electrically conductive second contacts, which are designed to be electrically isolated from the first contacts. First and second ends can then be received in the one tubular element plate so that the first ends are electrically conductively electrically conducting with the first electrical contacts and the second ends are electrically conducting with the second electrical contacts are contactable.
  • the voltage potential which is generated via the thermoelectric elements within the tubular element, can be dissipated to the exterior of the housing.
  • the encircling peripheral surface forms a sealing connection with the housing of the device at least on the first end side, so that an outflow of the exhaust gas past the tubular element plate is not possible, at least in the area of the first end side.
  • the execution of a tubular element plate on the second end face has the opposite large-area recesses in the region of the annular channel, so that the exhaust gas can flow through the annular channel via the recesses to the outlet of the housing without additional flow resistance and corresponding flow losses.
  • tubular elements achieves a consistently high temperature difference between the cooling medium and the exhaust gas, since the cooling medium is passed only once along the longitudinal axis of the housing through the annular channel through which the exhaust gas flows, and accordingly through the heat transfer via the tubular element only slightly heated. Accordingly, a plurality of radially successively arranged groups of tubular elements can be provided, also multi-stage with regard to the provision of the cooling medium, so that an effective implementation of the exhaust heat is achieved for generating electrical energy by a large-scale utilization of the volume of the annular channel.
  • the tube element plates have the corresponding at least one inlet or outlet on their respective peripheral surface or on one of their front sides, so that the flow channels for the cooling medium generated by the inner sides of the tube elements can be connected to the inlet or outlet through the tube element plate and channels provided therein are.
  • the device according to the invention is preferably used in an exhaust system with an exhaust gas recirculation line, wherein the device is arranged within the exhaust gas recirculation line.
  • temperatures in the exhaust gas can be controlled so that on the one hand set an optimal temperature range for the thermoelectric transducer elements and thus a high energy efficiency can be achieved by the device.
  • the device according to the invention is furthermore preferably used in a motor vehicle, which in particular has an exhaust system with exhaust gas recirculation line.
  • the device can also be used in the main exhaust line, so that the catalyst carrier body is at least partially flowed through by the total amount of exhaust gas.
  • the device thus forms a very compact arrangement, with which a highly efficient thermoelectric generator can be realized. Since its efficiency depends in particular on the heat transfer from the exhaust gas to the transducer elements, and a large heat exchange surface is provided in this radial flow, this structure for energy production has particular advantages.
  • the use of at least one of the device for thermal recuperation described herein according to the invention from exhaust gases of a mobile internal combustion engine is proposed, in which thermal energy is converted from the exhaust gas into electrical energy.
  • FIGS. show particularly preferred embodiments of the invention, but this is not limited thereto. They show schematically:
  • 1 shows a device with a tube element plate
  • 2 shows a device with two tube element plates
  • FIG. 3 shows a cross-section of an embodiment of the device
  • FIG. 4 shows a variant of a metallic layer of the catalyst carrier
  • FIG. 5 shows a variant of a pipe element
  • FIG. 6 shows a variant of a semiconductor element
  • Fig. 7 an embodiment of a motor vehicle with an exhaust system.
  • 1 shows a device 1 with a tube element plate 23.
  • the device 1 has a housing 4, which comprises a first end face 6 and a second end face 7.
  • An inlet 8 for an exhaust gas 10 is arranged on the first end face 6 and an outlet 9 for the exhaust gas 10 on the second end face 7.
  • a catalyst carrier body 14 and a plurality of tubular elements 17 are arranged inside the housing 4.
  • the exhaust gas 10 flows through the device 1, in which it enters via the first end face 6 through the inlet 8 into the cavity 30, which is formed within the catalyst carrier body 14 by the inner peripheral surface 16.
  • the exhaust gas stream 10 is deflected and flows through the catalyst carrier body 14 in the radial direction from the inner peripheral surface 16 toward the outer peripheral surface 15 of the catalyst carrier body 14.
  • the exhaust gas 10 exits from the outer peripheral surface 15 into the annular channel 28, which in turn through the outer peripheral surface 15 and Inner wall 29 of the housing 4 is limited.
  • the annular channel 28 is closed by the tubular element plate 23, so that the exhaust gas 10 flows in the direction of the second end face 7 along the annular channel 28 to the outlet 9.
  • the tubular elements 17 are arranged exclusively within the annular channel 28.
  • the tubular elements 17 extend parallel to the longitudinal axis 5 of the housing 4 between the first end face 6 and the second Front side 7.
  • the tubular elements 17 are received at a first end 21 through the tubular element plate 23 so that the cooling medium 13, which flows through the tubular elements 17, are fluidically connected through the tubular element plate 23 to at least one inlet 11 and one outlet 12, respectively , Furthermore, the tube elements 17 are electrically conductively connected at their first end 21 via an electrically conductive first contact 48 within the tube element plate 23 so that a voltage potential between the first end 21 and the second end 22 to the outside of the housing can be dissipated. Accordingly, 22 electrically conductive second contacts 49 are provided at the second end. The first contacts 48 and second contacts 49 are electrically isolated from each other, so that the tubular element plate 23 is executable divided in this case.
  • the tubular elements 17 can be fixed in addition to the receptacle by the tubular element plate 23 by a support member 27 with respect to their position in the housing 4.
  • the catalyst carrier body 14 is preferably arranged symmetrically about the longitudinal axis 5 of the housing 4 and extends over an axial extension 26 corresponding to parallel to the longitudinal axis 5.
  • the tube element plate 23 has at a first end face 50 openings 53 for receiving the tubular elements 17.
  • the tube element plate 23 closes off the annular channel 28 at the first end face 6 by the gas-tight connection of the peripheral surface 52 and / or the second end face 51 to the housing 4. In the left part of Fig. 1 it is shown that an internally located group of tubular elements 17, the catalyst carrier body 14 in a direction parallel to the longitudinal axis 5 cuts through.
  • the cooling medium 13 is passed through a tubular element 17 from the first end face 6 to the second end face 7 and is again returned to the first end face 6 by the same tubular element 17, which has a deflection in the region of the second end face 7.
  • FIG. 2 shows a device corresponding to FIG. 1, but here with two tube element plates 23, wherein the same components are provided with the same reference numerals.
  • the two tube element plates 23 are on the first th end face 6 and arranged on the second end face 7.
  • the tubular element plate 23 on the first end face 6 has inlets 11 for the cooling medium 13, so that the cooling medium 13 flows through the tubular elements 17 in the direction of the first end face 6 to the second end face 7 to Ausläu- fen 12 towards.
  • cooling medium 13 and exhaust gas 10 flow rectified through the device 1 in the region of the annular channel 28.
  • first contacts 48 are provided in the region of the tube element plates 23, which dissipate the electrical current generated by the thermoelectric elements 20 toward a first electrical conductor 55 to the exterior of the housing.
  • second contacts 49 are provided, which are electrically conductively connectable to a second electrical conductor 56, so that a voltage potential, which is generated via the thermoelectric elements 20, by the first electrical conductor 55 and second electrical see conductor 56 can be included.
  • First electrical conductor 55 and second electrical conductor 56 are connected to external loads and / or an electrical memory, so that the electric current generated by the thermoelectric elements 20 is supplied thereto.
  • the tube elements 17 are received in openings 53 so that the cooling medium 13 can be conducted from the tube elements 17 via channels 54 to an inlet 11 or to an outlet 12.
  • FIG. 3 shows a cross-section of an embodiment variant of the device 1.
  • This cross-section AA (marked in FIG. 2) cuts through the device 1, so that the catalyst carrier body 14 and the tube carrier 14 are cut through.
  • Elements 17 are shown in cross section.
  • the device 1 has a housing 4, wherein within the housing 4, a catalyst carrier body 14 is arranged, which is radially flowed through by an inner cavity 30 from its inner peripheral surface 16 towards its outer peripheral surface 15 of the exhaust gas 10.
  • the exhaust gas flows out of the catalyst carrier body 14 into an annular channel 28 surrounding the catalyst carrier body 14, which extends from the catalyst carrier body 14 as far as the inner wall 29 of the housing 4.
  • tubular elements 17 are arranged, through which a cooling medium 13 flows.
  • the cooling medium 13 enters the device 1 or the tubular element plate 23 via inlets 11 and is fluidically connected via channels 54 to the tubular elements 17 and is led out of the device 1 correspondingly via outlets 12.
  • the catalyst carrier body 14 is flowed through by the exhaust gas 10 radially through flow channels 32 in the direction of the radial extension 33 of the catalyst carrier body 14.
  • the flow channels 32 are formed by an at least partial structuring of the metal foil forming the catalyst carrier body 14.
  • the catalyst carrier body 14 is formed in a particularly advantageous embodiment variant by stacking partially structured metal foils 34, which form flow channels 32 as a result of their structuring which is at least partially present. Through these flow channels 32, the exhaust gas 10 flows from an inner peripheral surface 16 toward an outer peripheral surface 15 along the radial extent 33 of the catalyst carrier body 14.
  • the metal foils 34 are stacked on each other so that a catalyst carrier body 14 is formed with a longitudinal axis 5.
  • Fig. 5 shows a variant of a tubular element 17.
  • the tubular element 17 is formed by an inner tube 36 having an inner side 19, which is flowed through by the cooling medium 13, and an outer tube 37 with an outer side 18, the transverse of an exhaust gas 10 - is flowing.
  • thermoelectric elements 20 are arranged, which are connected to each other via electrically conductive bridges 57, that by the thermoelectric elements 20, an electric current from a first end 21 to a second end 22nd the tubular element 17 is transferable.
  • the intermediate space between the inner tube 36 and the outer tube 37, in which the thermoelectric elements 20 are arranged, is sealed gas-tight at the respective first end 21 and second end 22 via sealing elements 35, so that the thermoelectric elements 20 neither from the exhaust gas 10 yet can be acted upon by the cooling medium 13.
  • the sealing elements 35 are in particular electrically conductive, so that the electrically conductive bridge elements can transmit the electric current generated by thermoelectric elements 20 via the sealing element 35 to electrically conductive contacts 48, 49 in the tube element plates 23.
  • FIG. 6 shows a variant embodiment of an annular semiconductor element 58 which generates a thermoelectric element 20 at least with a further semiconductor element 58.
  • the semiconductor element 58 has an outer surface 40 and an inner surface 41 and a height 38 between inner surface 41 and outer surface 40. Further, it is bounded by the side surfaces 42 in an axial direction, respectively. Within the inner surface 41, the inner tube 36 and outside the outer surface 40, the outer tube 37 of the tubular elements 17 is arranged.
  • a current transition surface 39 is further formed on the first contact surface 43, so that the semiconductor element 58 can be connected to other adjacent semiconductor elements 58 electrically conductively via bridge elements 57 to thermoelectric elements 20. Further current transition surfaces 39 are also arranged on the second contact surface 44 on the inner surface 41 of the semiconductor element 58.
  • FIG. 7 shows an embodiment of a motor vehicle 25 with an exhaust system 2 and an exhaust treatment component 45
  • Exhaust gas 10 flows from an internal combustion engine 3 starting an exhaust system 2 towards a device 1, which is arranged in the main exhaust line or in an exhaust gas recirculation line 24 of the exhaust system 2.
  • the device 1 is electrically conductively connected to a power supply 46, in particular a battery or an electrical load, so that the electrical current generated by the thermoelectric elements 20 can be dissipated.
  • thermoelectric elements 20 thermoelectric elements

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

La présente invention concerne un dispositif pour un système de gaz d'échappement d'un moteur à combustion interne, comportant un carter, dans lequel est disposé un corps support de catalyseur pouvant être parcouru par des gaz d'échappement et à travers lequel les gaz d'échappement circulent dans la direction radiale. Une pluralité d'éléments tubulaires, dont les faces extérieures sont soumises à l'action des gaz d'échappement et les faces intérieures à l'action d'un réfrigérant, est agencée en aval du corps support de catalyseur, des éléments thermoélectriques étant agencés entre les faces extérieures et les faces intérieures des éléments tubulaires. On obtient ainsi une structure très compacte et très efficace pour un générateur thermoélectrique.
PCT/EP2011/054306 2010-03-24 2011-03-22 Dispositif comprenant un corps support de catalyseur et un générateur thermoélectrique disposés dans un carter WO2011117222A1 (fr)

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DE102010012629A DE102010012629A1 (de) 2010-03-24 2010-03-24 Vorrichtung umfassend einen Katalysatorträgerkörper und einen thermoelektrischen Generator angeordnet in einem Gehäuse
DE102010012629.2 2010-03-24

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WO2008148042A2 (fr) 2007-05-25 2008-12-04 Bsst Llc Système et procédé pour le chauffage et le refroidissement thermoélectrique distribués
WO2009149207A2 (fr) 2008-06-03 2009-12-10 Bsst Llc Pompe à chaleur thermoélectrique
EP2349753B1 (fr) 2008-10-23 2016-11-23 Gentherm Incorporated Système hvac à modes multiples à dispositif thermoélectrique
EP3151293A1 (fr) 2009-07-24 2017-04-05 Gentherm Incorporated Procédés et systèmes de production d'électricité sur la base de la thermoélectricité
JP5908975B2 (ja) 2011-06-06 2016-04-26 ジェンサーム インコーポレイテッドＧｅｎｔｈｅｒｍ Ｉｎｃｏｒｐｏｒａｔｅｄ カートリッジベース熱電システム
US9006557B2 (en) 2011-06-06 2015-04-14 Gentherm Incorporated Systems and methods for reducing current and increasing voltage in thermoelectric systems
US9306143B2 (en) 2012-08-01 2016-04-05 Gentherm Incorporated High efficiency thermoelectric generation
DE102013221573A1 (de) 2012-12-18 2014-06-18 Magna Powertrain Ag & Co. Kg Thermoelektrischer Generator
DE112014000607T5 (de) 2013-01-30 2015-10-22 Gentherm Incorporated Auf Thermoelektrik basierendes Thermomanagementsystem
FR3010504B1 (fr) * 2013-09-10 2017-12-15 Valeo Systemes Thermiques Module et dispositif thermo electrique, notamment destines a generer un courant electrique dans un vehicule automobile
DE102014201908A1 (de) * 2014-02-03 2015-08-06 Duerr Cyplan Ltd. Verfahren zur Führung eines Fluidstroms, Strömungsapparat und dessen Verwendung
DE102015102311A1 (de) * 2015-02-18 2016-08-18 HUGO PETERSEN GmbH Rohrbündelwärmeübertrager
DE102015102312A1 (de) * 2015-02-18 2016-08-18 HUGO PETERSEN GmbH Rohrbündelwärmeübertrager mit sequentiell angeordneten Rohrbündelkomponenten
WO2017149048A2 (fr) * 2016-03-01 2017-09-08 Valeo Systemes Thermiques Dispositif thermoelectrique et generateur thermoelectrique comprenant un tel dispositif
DE102016112232B4 (de) 2016-07-05 2019-06-27 Deutsches Zentrum für Luft- und Raumfahrt e.V. Heißgasnutzungsvorrichtung, Fahrzeug und Verfahren zum Betreiben einer Heißgasnutzungsvorrichtung
US10991869B2 (en) 2018-07-30 2021-04-27 Gentherm Incorporated Thermoelectric device having a plurality of sealing materials
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