WO2009077468A2 - Module thermoélectrique et générateur thermoélectrique - Google Patents

Module thermoélectrique et générateur thermoélectrique Download PDF

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Publication number
WO2009077468A2
WO2009077468A2 PCT/EP2008/067463 EP2008067463W WO2009077468A2 WO 2009077468 A2 WO2009077468 A2 WO 2009077468A2 EP 2008067463 W EP2008067463 W EP 2008067463W WO 2009077468 A2 WO2009077468 A2 WO 2009077468A2
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WO
WIPO (PCT)
Prior art keywords
thermoelectric
module
heat
layer
contact surface
Prior art date
Application number
PCT/EP2008/067463
Other languages
German (de)
English (en)
Other versions
WO2009077468A3 (fr
Inventor
Peter Treffinger
Lizhi Zhu
Original Assignee
Deutsches Zentrum für Luft- und Raumfahrt e.V.
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
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Application filed by Deutsches Zentrum für Luft- und Raumfahrt e.V. filed Critical Deutsches Zentrum für Luft- und Raumfahrt e.V.
Publication of WO2009077468A2 publication Critical patent/WO2009077468A2/fr
Publication of WO2009077468A3 publication Critical patent/WO2009077468A3/fr

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Classifications

    • 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
    • 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
    • H10N10/13—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 heat-exchanging means at the junction

Definitions

  • thermoelectric module and thermoelectric generator
  • thermoelectric module comprising electrical conducting elements arranged in a first layer, electrical conducting elements arranged in a second layer spaced apart from the first layer, a plurality of thermoelectric elements arranged between the first layer and the second layer, a first insulating layer in which the electrical guide elements arranged in the first layer are electrically isolable relative to a heat source, a second insulating layer by means of which the electrical guide elements arranged in the second layer can be electrically insulated relative to a heat sink, a first contact surface for contact with a heat-emitting surface and a second abutment surface for abutment with a heat-absorbing surface.
  • thermoelectric generator having at least one thermoelectric module of the aforementioned type, wherein by means of the first insulating layer arranged in the first layer electrical guide elements are electrically insulated relative to a heat source, wherein by means of the second insulating layer arranged in the second layer electrical Guide elements are electrically insulated relative to a heat sink, wherein the first contact surface bears against a heat-emitting surface and wherein the second contact surface bears against a heat-absorbing surface.
  • thermoelectric generator and an aforementioned thermoelectric module are disclosed in US 6,028,623.
  • thermoelectric system which comprises a plurality of thermoelectric elements which form a thermoelectric arrangement with a cooling side and a heating side, wherein the thermoelectric elements are thermally separated from one another in at least a direction along the arrangement are isolated.
  • At least one heat exchanger is provided on the cooling side and / or the heating side in thermal communication with at least one thermoelectric element, wherein the heat exchanger is configured so that the thermal insulation of the thermoelectric elements is maintained.
  • Thermoelectric generators are likewise known from US Pat. No. 3,075,030, DE 10 2005 032 764 A1, DE 1 273 646, US Pat. No. 4,730,459 and DE 1 944 351.
  • US Pat. No. 3,744,560 discloses a heat transfer device for use in a thermoelectric generator which automatically compensates for shocks, vibrations and thermal expansion.
  • the device comprises a solid block composed of four slidable wedges.
  • thermoelectric device which has at least two individual thermoelectric elements, said connecting members are provided for electrical series connection and thermal parallel connection of the individual elements.
  • An absorption mass for absorbing the thermal expansion of the individual thermoelectric elements and the connecting members when the temperature difference is applied across the component is provided.
  • thermoelectric generator electrical power can be generated by applying heat from a heat source via the thermoelectric elements of a thermoelectric module of a heat sink is supplied.
  • the voltage which can be tapped on electrical connections of a thermoelectric module of a generator is dependent inter alia on the materials used for the thermoelectric elements and on the temperature difference applied across the thermoelectric elements.
  • thermoelectric elements of a module are combined to form a pair.
  • a first thermoelectric element of such a pair comprises a positively doped material
  • a second thermoelectric element of such a pair comprises a negatively doped material.
  • a voltage which can be tapped off on a pair of thermoelectric elements is relatively small. Therefore, usually a plurality of pairs are connected in series with each other to increase the voltage tapped across these pairs. Different pairs of thermoelectric elements and / or different groups with pairs connected in series can also be connected in parallel for setting a current-voltage characteristic of a thermoelectric module or a plurality of thermoelectric modules.
  • thermoelectric module On electrical guide elements, which are arranged in spaced-apart layers.
  • thermoelectric generator In order to conduct a heat flow through a thermoelectric generator, a good thermal contact of the thermoelectric module to the heat source and / or to the heat sink is desired. On the other hand, an electrical contact between the electrical guide elements of a layer of the thermoelectric module and the heat source or the heat sink must be avoided. Therefore, insulating layers are used which allow good heat conduction from the heat source to the first layer and / or from the second layer to the heat sink, but in this case electrically isolate the electrical guide elements relative to the heat source or to the heat sink.
  • Thermoelectric generators have the advantage that they work wear-free, since they have no moving components.
  • thermoelectric generators have a comparatively low efficiency and that for good heat contact of the individual layers or layers of the thermoelectric generator space-consuming and heavy devices are required, which clamp the individual layers or layers against each other.
  • space-consuming and heavy devices are required, which clamp the individual layers or layers against each other.
  • a thermoelectric generator expands during operation depending on the applied temperature difference.
  • the present invention has the object to provide a thermoelectric module and a thermoelectric generator of the type mentioned, which allow a good efficiency and a simple compensation thermally induced expansions.
  • thermoelectric module and in a thermoelectric generator of the type mentioned in that the first contact surface and the second contact surface are angled to each other.
  • thermoelectric module The contact surfaces of the thermoelectric module according to the invention are not - as known from the prior art - parallel to each other, but at an angle to each other.
  • a wedge-shaped thermoelectric module can be provided.
  • Such a module can be integrated into the structure of a thermoelectric generator in a positive manner in a simple manner and at the same time act upon a high clamping force in order to establish the thermal contact between the first contact surface of the module and a heat-emitting surface of the thermoelectric generator and around the Heat contact between the second contact surface of the module and a heat-receiving surface of the thermoelectric generator improve. Due to the wedge shape of the module, it is possible that the module for compensating thermally induced thermal expansions moves relative to the heat-emitting and / or the heat-absorbing surface by a sliding surface of the module associated with this surface slides on this surface.
  • the first contact surface extends in a straight plane. This allows for easy fabrication of the thermoelectric module and good thermal contact with a heat-emitting surface of the generator extending in a straight plane.
  • thermoelectric module can be integrated in a simple manner and space-saving in a thermoelectric generator.
  • the second contact surface extends in a straight plane. This allows for easy fabrication of the thermoelectric module and good thermal contact with a straight-plane heat-receiving surface of the generator.
  • the angle between the first contact surface and the second contact surface is at least 0.5 ° inclusive, in particular at least 1 ° inclusive. In this way, a clamping force exerted on the thermoelectric module can be used almost completely in order to clamp the module to adjacent parts of the generator.
  • the angle between the first contact surface and the second contact surface is at most 10 ° inclusive, in particular at most 5 ° inclusive.
  • the surface roughness R z of the first contact surface and / or the second contact surface is a maximum of 12 ⁇ m. With such a roughness depth, sliding of the contact surfaces of the thermoelectric module on or on heat-emitting or heat-absorbing surfaces of a thermoelectric generator is facilitated.
  • the first insulating layer distributed over the module has a varying layer thickness. In this way it is possible to produce mutually angled contact surfaces, without having to vary the height, for example, the thermoelectric elements.
  • the second insulating layer distributed over the module has a varying layer thickness. This also allows easy production of mutually angled contact surfaces.
  • thermoelectric elements distributed over the module have different heights. In this way, angled contact surfaces can be generated without having to vary the layer thickness of the insulating layers, for example.
  • the electrical guide elements arranged in the first position are distributed over the module and / or the electrical guide elements arranged in the second position are distributed over the module at different heights.
  • This also makes it possible to produce a thermoelectric module with mutually angled contact surfaces.
  • the contact surfaces of the module can each be formed by an outer surface of the first insulating layer and by an outer surface de second insulating layer.
  • the thermoelectric module has at least one additional layer, which is arranged adjacent to an outer surface of the first insulating layer and / or to an outer surface of the second insulating layer. Such an additional layer then forms a contact surface for engagement with a heat-emitting surface or a heat-absorbing surface of the generator.
  • the at least one additional layer is a temperature compensation layer.
  • the additional layer of a highly thermally conductive material, in particular copper be made in order to evenly distributed over the module applied temperature.
  • the at least one additional layer distributed over the module has a varying layer thickness.
  • the surface roughness R z of the heat-emitting surface and / or the heat-absorbing surface of the generator amounts to a maximum of 12 ⁇ m.
  • the heat source comprises at least one flow channel for the flow through with a heat-emitting fluid. This allows efficient transfer of the heat of a fluid to the heat source of the generator.
  • the heat sink comprises at least one flow channel for flowing through with a heat-absorbing fluid.
  • the heat-emitting surface may be formed by an outer wall surface of a flow channel boundary of the heat source.
  • the heat-receiving surface may be formed by an outer wall surface of a flow channel boundary of the heat sink.
  • the thermoelectric generator comprises at least one additional element, which is arranged between the heat source and the first contact surface or between the heat sink and the second contact surface.
  • the additional element forms a heat-absorbing or a heat-emitting surface, which cooperates with one of the contact surfaces of the thermoelectric module.
  • the at least one additional element has outer surfaces facing away from each other, which are angled relative to one another.
  • the additional element can be used both as a heat transfer element and as a power transmission element.
  • the angle between the outer surfaces of the additional element is equal to the angle between the contact surfaces of the thermoelectric module. This makes it possible to use heat sources and heat sinks with the module respectively facing, mutually parallel surfaces.
  • the at least one additional element is a temperature compensation element.
  • Such an additional element may, for example, be made of a metal with a high thermal conductivity, preferably copper. In this way, with the help of the additional element distributed over the module applied temperature can be made uniform.
  • the thermoelectric generator comprises a module support device for supporting the at least one thermoelectric module, the module support device comprising at least one module support surface which extends transversely to at least one of the contact surfaces of the at least one thermoelectric Module extends.
  • the module support means makes it possible to provide an abutment on which the thermoelectric module can be supported and, starting from this abutment, can move in a direction transverse to a direction of force application.
  • thermoelectric generator comprises a surface support device for supporting the heat-emitting surface or the heat-receiving surface, wherein the surface support device comprises at least one surface support surface which extends transversely to the heat-emitting surface or to the heat-absorbing surface.
  • the thermoelectric generator comprises at least one connection device for connecting the at least one thermoelectric module, the heat source and the heat sink.
  • connection device for connecting the at least one thermoelectric module, the heat source and the heat sink.
  • thermoelectric generator comprises at least one compensating device for compensating thermally induced dimensional changes of the generator.
  • a compensation device may in particular be formed by a spring element which is under pretension and can exert a clamping force in this way.
  • the heat source is formed by an exhaust system of a discontinuously operating combustion device, in particular by an exhaust system of a motor vehicle.
  • a heat source may comprise, for example, a heat exchanger in which the hot exhaust gas of an internal combustion engine is guided. This heat exchanger transfers the heat of the exhaust gas to the at least one insulating layer of the thermoelectric module, which provides an electrical voltage. This has the advantage that the otherwise unused waste heat of a motor vehicle can be used to generate electrical energy. Thus, the overall efficiency of the motor vehicle can be increased.
  • the heat source is formed by an exhaust system of a continuously operating combustion device, in particular by a waste heat unit (for example, a combustion chamber) of a power plant.
  • a waste heat unit for example, a combustion chamber
  • FIG. 1 shows a perspective view of an embodiment of a thermoelectric generator
  • FIG. 2 is a sectional view of the thermoelectric generator of Figure 1;
  • FIG. 3 shows a side view of an embodiment of a schematically illustrated thermoelectric module and an additional element
  • FIG. 4 shows a perspective view of an embodiment of a thermoelectric module.
  • thermoelectric generator 10 An embodiment of a thermoelectric generator designated overall by the reference numeral 10 is shown in FIG.
  • the generator 10 extends along a generator axis 12 from a flow inlet 14 to a flow outlet 16.
  • the generator 10 is flowed through by a hot fluid, for example the exhaust gas of an internal combustion engine of a motor vehicle, in a flow direction 18 from the flow inlet 14 to the flow outlet 16.
  • a hot fluid for example the exhaust gas of an internal combustion engine of a motor vehicle
  • the generator 10 includes a fluid manifold 20 which extends from the flow inlet 14 to a central generator portion 22.
  • the generator 10 further includes a fluid collector 24 extending from the central generator portion 22 to the flow outlet 16.
  • the central generator part 22 has a multi-part housing 26.
  • the housing 26 comprises an upper housing part 28 and a lower housing part 30.
  • the housing parts 28 and 30 are connected to one another by means of connecting elements 32 designed as screws.
  • the generator part 22 has two different heat sinks of the generator 10 associated cooling fluid inputs 34 and cooling fluid outlets 36.
  • the generator 10 further includes a heat source 38 extending between the fluid manifold 20 and the fluid collector 24.
  • the heat source 38 is connected to the fluid manifold 20 via a flange connection 40.
  • the heat source 38 is further connected via a flange 42 with the fluid collector 24.
  • the housing 26 of the generator part 22 defines a generator room 44.
  • the generator room 44 is rectangular in cross-section.
  • the heat source 38 which extends along the generator axis 12 (see FIG.
  • the heat source 38 has a flow channel 46 in fluid communication with the fluid manifold 20 and with the fluid collector 24.
  • the flow channel 46 is rectangular in cross section.
  • the flow channel 46 is bounded by a bottom-side flow channel boundary 48 and a parallel thereto, the ceiling-side flow channel boundary 50.
  • the flow channel 46 is further limited by two lateral flow channel boundaries 52nd
  • rib members 54 are provided, which project from the bottom-side flow channel boundary 48 in the flow channel 46. Furthermore, a plurality of rib elements 56, which are parallel to each other and extend along the generator axis 12, are provided, which project from the cover-side flow channel boundary into the flow channel 46.
  • the rib members 54 and 56 are arranged offset from each other.
  • the generator 10 has a first heat sink 58 which extends parallel to the generator axis 12. Furthermore, the generator 10 has a second heat sink 60 which also extends parallel to the generator axis 12.
  • the heat sinks 58 and 60 are disposed on opposite sides of the heat source 38.
  • the heat sinks 58 and 60 are fed by a respective associated cooling fluid inlet 34 with cooling fluid.
  • the cooling fluid flows through the heat sinks 58, 60 and is removed via the cooling fluid outlets 36 from the heat sinks 58, 60 (see FIG.
  • the heat sinks 58, 60 each have a bottom-side flow channel boundary 62 and a cover side arranged opposite thereto Flow channel boundary 64 on. Furthermore, the heat sinks 58 and 60 have two lateral flow channel boundaries 66.
  • the heat sinks 58 and 60 comprise a plurality of fin elements 68 extending parallel to the generator axis 12 and having a height corresponding to the distance between the flow channel boundaries 62 and 64.
  • a multiplicity of parallel flow chambers 70, 72 is formed.
  • the flow chambers 70, 72 together form a flow channel 74 which is generally rectangular in cross-section.
  • the generator 10 includes a plurality of wedge-shaped thermoelectric modules 76 which are each disposed between the heat source 38 and one of the heat sinks 58, 60. Each thermoelectric module 76 cooperates with a wedge-shaped additional element 78, which is arranged between a thermoelectric module 76 and the heat source 38.
  • the generator 10 has at least one module support device 80 which serves for positioning at least one thermoelectric module 76.
  • the module support devices 80 shown in FIG. 2 are designed in the form of a web and extend from the heat source 38 in the direction of an adjacent heat sink 58 or 60.
  • the module support devices 80 have two module support surfaces 82, 84 arranged on opposite sides. With each support surface 82, 84 a stop for a thicker end of a wedge-shaped thermoelectric module 76 is formed.
  • the generator 10 further includes a plurality of surface support means 86. These are formed by webs integrally connected to the lateral flow channel boundaries 52 of the heat source 38.
  • the surface support means 86 have surface support surfaces 88 extending parallel to the module support surfaces 82, 84.
  • the surface support surfaces 88 each serve to support the thicker end of a wedge-shaped additional element 78.
  • the generator 10 has two thermal insulation 90, which are each disposed adjacent to the lateral flow channel boundaries 52 of the heat source 38.
  • a balancing device designated overall by 92, by means of which thermally induced dimensional changes of the generator 10 can be compensated.
  • the compensation device 92 comprises a plurality of spring elements, in particular disc springs 94.
  • Each plate spring 94 is supported at one end on an inner side of the housing 26 and at an opposite end to a flow channel boundary 62, 66 of a heat sink 58, 60.
  • the heat sinks 58, 60 each have the inner side of the housing 26 facing centering 96.
  • the housing 26 and the equalizer 92 together form a connector (not numbered) for connecting the heat source 38, the thermoelectric modules 76 and the heat sinks 58, 60.
  • FIG. 3 shows a thermoelectric module 76 and an additional element 78 for use in a thermoelectric generator 10.
  • the thermoelectric module 76 has a first contact surface 100, via which the thermoelectric module 76 can absorb a heat flow.
  • the module 76 also has a second contact surface 102, by means of which a heat flow can be derived from the module 76.
  • the abutment surfaces 100 and 102 are inclined relative to each other, so that the module 76 has a wedge shape.
  • the module 76 extends from a thinner end 104 toward a thicker end 106.
  • a lower side surface 108 is provided; at the thicker end 106, a higher side surface 110 is provided.
  • a height 112 of the side surface 108 may be, for example, 5 mm.
  • a height 114 of the side surface 110 may be, for example, 7 mm.
  • the contact surfaces 100 and 102 are angled to each other.
  • An angle 116 between the contact surfaces 100 and 102 is preferably between 0.5 ° and 5 °, in particular between 1 ° and 2 °.
  • the additional element 78 is made of a highly heat conductive material, such as copper.
  • the additional element 78 has a wedge shape. It has two mutually opposite, mutually angled outer surfaces 118, 120.
  • the attachment member 78 extends from a thinner end 122 to a thicker end 124. At the thinner end 122, a lower side surface 126 is provided; at the thicker end 124, a higher side surface 128 is provided. A dimension 130 of the lower side surface 126 may be, for example, 6 mm; a dimension 132 of the higher side surface 128 may be 8 mm, for example.
  • the outer surfaces 118 and 120 enclose an angle 134 with each other.
  • the angle 134 is preferably between 0.5 ° and 5 °, in particular between 1 ° and 2 °. In particular, the angle 134 is equal to the angle 116, the bearing surfaces 100, 102 of the module 76 include each other.
  • a distance 135 between the side surfaces 126, 128 may in particular be between 50 mm and 100 mm.
  • the side surfaces 108, 110 of the module 76 may also be spaced apart in particular between 50 mm and 100 mm.
  • thermoelectric module 76 The detailed structure of the thermoelectric module 76 will be described below with reference to FIG.
  • the module 76 has electrical conduction elements 138 arranged in a first position 136. Spaced to the first layer 138, a second layer 140 is arranged, which comprises electrical guide elements 142.
  • thermoelectric elements 146 are disposed between the layers 136 and 140.
  • the thermoelectric elements 146 are connected in series by means of the electrical conducting elements 142 and 144.
  • the module 76 has a first insulating layer 148.
  • the first insulating layer 148 may be made of a ceramic material, for example.
  • the first insulating layer 148 is rectangular overall. It has a layer thickness 150 distributed over the module 76 so that the insulating layer 148 and thus the module 76 are wedge-shaped as a whole.
  • the module 76 further comprises a second insulating layer 154, by means of which the electrical conducting elements 142 of the second layer 140 are electrically insulated from a heat sink 58, 60.
  • the second insulating layer is made of a ceramic material, for example.
  • the second insulating layer 154 has a constant layer thickness 156.
  • thermoelectric elements 146 When the first contact surface 100 of the module 76 abuts a heat-emitting surface of the generator 10 and when the second contact surface 102 of the module 76 abuts a heat-receiving surface of the generator 10, a heat flow flows through the module 76 therethrough. In this way, with the aid of the thermoelectric elements 146, a voltage can be generated, which can be tapped off at electrical connections 158, 160.
  • thermoelectric generator 10 With further reference to Figure 2, the operation of the thermoelectric generator 10 will be described below.
  • the flow channel 46 of the heat source 38 is flowed through by a hot fluid.
  • This fluid gives off heat to the flow channel boundaries 48 and 50 of the heat source 38, which introduce the heat into the additional elements 78.
  • the outer surface 118 of an additional element 78 facing a module 76 forms a heat-emitting surface 162 of the generator 10 (see FIG. 3), which rests against the first contact surface 100 of a module 76. Due to the contact between the outer surface 162 and the first contact surface 100, the heat flow can be conducted further into the module 76, so that with the aid of the module 76 - as described above - a voltage can be generated, which can be tapped off at the terminals 158, 160 ,
  • the heat flow is conducted via the second contact surface 102 of a module 76 in the direction of one of the heat sinks 58, 60.
  • the second contact surface 102 of a module 76 is in contact with a heat-absorbing surface 164 of the heat sinks 58, 60.
  • the heat dissipation by means of the heat sinks 58, 60 takes place via a cooling fluid flowing through the flow channels 74.
  • the additional elements 78 and the modules 76 heat.
  • the said parts expand.
  • the first contact surface 100 of the module 76 and the outer surface 118 of the additional element 78 glide against each other. This sliding can be assisted by the surfaces 100 and 118 have a low roughness, in particular a roughness R z of less than 12 microns.
  • the higher side surface 110 of the module 76 is supported on a module support surface 82 assigned to this side surface.
  • the higher side surface 128 of the additional element 78 bears against a surface supporting surface 88 supporting the additional element 78 and thus the outer surface 118.
  • Each opposing surface support surfaces 88 and module support surfaces 82 are spaced from each other by an amount which is greater than the distance 135 between the side surfaces 126, 128 of an additional element and a distance (no reference numeral) between the side surfaces 108, 110 of a module 76th In this way, the additional element 78 can expand in the direction of a module support device 80.
  • the module 76 may expand toward a surface support 86.
  • a module 76 and an associated additional element 78 are positively embedded between a heat source 38 and a heat sink 58, 60.
  • the heat-absorbing surface 164 of the generator 10 is formed by an outer wall surface of a flow channel boundary 64 of a heat sink 58, 60.
  • the heat-absorbing surface 164 of the generator 10 may also are formed by a particular wedge-shaped additional element which is arranged between the second contact surface 102 of a module 76 and a heat sink.
  • the heat-emitting surface 162 of the generator 10 can not be formed by an additional element 78, but by an outer wall surface of a flow channel boundary 48, 50 of the heat source 38th

Landscapes

  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

L'invention concerne un module thermoélectrique, comprenant des éléments conducteurs électriques placés dans une première couche, des éléments conducteurs électriques placés dans une seconde couche située à une certaine distance de la première, plusieurs éléments thermoélectriques placés entre la première et la seconde couche, une première couche isolante, au moyen de laquelle les éléments conducteurs électriques placés dans la première couche peuvent être isolés électriquement d'une source de chaleur, une seconde couche isolante, au moyen de laquelle les éléments conducteurs électriques placés dans la seconde couche peuvent être isolés électriquement d'un dissipateur thermique, une première surface de contact destinée à être appliquée contre une surface exothermique et une seconde surface de contact destinée à être appliquée contre une surface endothermique. Le but de l'invention est d'améliorer un tel module thermoélectrique, de sorte qu'il puisse offrir un bon rendement et compenser de manière simple des dilatations d'origine thermique. A cet effet, la première surface de contact forme un angle avec la seconde surface de contact.
PCT/EP2008/067463 2007-12-19 2008-12-12 Module thermoélectrique et générateur thermoélectrique WO2009077468A2 (fr)

Applications Claiming Priority (2)

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DE102007063171.7 2007-12-19
DE102007063171A DE102007063171A1 (de) 2007-12-19 2007-12-19 Thermoelektrisches Modul und thermoelektrischer Generator

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WO2009077468A2 true WO2009077468A2 (fr) 2009-06-25
WO2009077468A3 WO2009077468A3 (fr) 2009-12-23

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