WO2004061984A1 - Generateur asynchrone a effet galvanomagnetothermique - Google Patents
Generateur asynchrone a effet galvanomagnetothermique Download PDFInfo
- Publication number
- WO2004061984A1 WO2004061984A1 PCT/FR2003/003894 FR0303894W WO2004061984A1 WO 2004061984 A1 WO2004061984 A1 WO 2004061984A1 FR 0303894 W FR0303894 W FR 0303894W WO 2004061984 A1 WO2004061984 A1 WO 2004061984A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inductors
- asynchronous generator
- magnetic field
- generator according
- conversion properties
- Prior art date
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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
- H10N15/00—Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using the Nernst-Ettingshausen effect
Definitions
- the present invention relates to an asynchronous generator with galvanomagnetothermal effect. This involves producing a generator using the thermoelectric properties of certain materials. Such a generator is connected on the one hand to a hot source and on the other hand to a cold source. It can then operate either as a heat pump or as an electric generator. In the first case, the generator draws energy from the cold source to bring it to the hot source. In the second case, an energy transfer takes place from the hot source to the cold source with production of electrical energy.
- thermoelectric generator device producing electrical energy from thermal energy using the Nernst effect.
- the device described comprises a conversion element made of a material having thermoelectric properties, means for generating a magnetic field, heating and cooling means so as to create a temperature gradient perpendicular to the magnetic field.
- the element having thermoelectric properties is split and each edge of the slot has an electrode. A potential difference appears between these two electrodes in the presence of the magnetic field and the temperature gradient.
- the drawback of such a device is that the potential difference between two electrodes is at best of the order of a Volt. It is therefore necessary to couple several elements to obtain higher voltages.
- the power supplied by such a device is also relatively low. As a result, the energy efficiency is also very low.
- the present invention therefore aims to provide an electric generator using the Nernst effect to obtain an attractive yield allowing economically advantageous operation.
- At least one element having themoelectric conversion properties arranged in a plane substantially perpendicular to the direction of the temperature gradient.
- the magnetic field generated is a traveling wave field moving in the second direction
- each element having thermoelectric conversion properties has a continuous shape in the plane perpendicular to the second direction.
- thermoelectric conversion properties a short-circuit electric field is generated at the elements having thermoelectric conversion properties. It then becomes possible to recover from the means for generating a magnetic field an electric current. On the balance sheet of this generating device, a signal essentially consuming reactive power is sent to create a magnetic field and thanks to the thermoelectric conversion, it is possible to recover an electric current and active power.
- a first embodiment provides that a generator according to the invention comprises several elements having thermoelectric conversion properties, each of these elements having an annular shape and being arranged in a plane perpendicular to the second direction.
- the element having thermoelectric conversion properties is for example of cylindrical tubular shape and extends in the second direction.
- thermoelectric conversion properties For a better performance of the device, a material having an interesting Nernst coefficient is chosen for each element having thermoelectric conversion properties. It is then proposed to produce these elements based on indium antimonide (InSb).
- InSb indium antimonide
- the means for generating a magnetic field comprise for example on the one hand a ferromagnetic core and on the other hand inductors in the form of coils supplied electrically.
- the means for generating a magnetic field include inductors in the form of electrically powered coils, these inductors being arranged in pairs facing each other so that in the air gap of two inductors corresponding is at least one element having thermoelectric conversion properties.
- the inductors are advantageously produced by superconductive windings. Details and advantages of the invention will emerge more clearly from the description which follows, given with reference to the appended schematic drawing in which:
- FIG. 1 is a block diagram of a first embodiment of a generator according to the invention
- FIG. 2 schematically shows an alternative embodiment of the generator of FIG. 1,
- FIG. 3 shows an alternative embodiment of the generator of FIG. 2
- FIG. 4 shows an electrical schematic diagram of a circuit making it possible to carry out the self-excitation of a generator of FIGS. 1 to 3.
- annular elements 2 having thermoelectric conversion properties, a core magnetic 4, a hot source 6, a cold source 8 and inductors 10.
- the annular elements 2 are thus subjected on the one hand to a temperature gradient VT and on the other hand to a magnetic field H. Taking into account the thermoelectric properties of the annular elements 2, an electric field E is created in each of these rings. . The creation of this electric field is also known as the Nernst effect.
- the device has rotational symmetry with respect to a longitudinal axis 12.
- the temperature gradient VT is parallel to this axis of rotation while the magnetic field H is radial by relation to this axis.
- the electric field is given by the following equation:
- the hot source 6 can for example be a hot source produced by a thermal power station or equivalent.
- the cold source 8 is obtained by a cooling system. Thermal insulation, not shown in the drawing, makes it possible to isolate the hot source 6 from the cold source 8.
- the inductors 10 are supplied with alternating current so as to create, with the help of the core 4, a magnetic field H at the level of the annular elements 2.
- the supply is made so that a progressive magnetic wave travels long-tudinally by with respect to axis 12. A sliding magnetic field is thus created moving in the direction of this axis 12.
- a structure close to that of an annular electromagnetic sodium pump Here, the vein of sodium liquid is replaced by the succession of annular elements 2.
- Indium antimonide (InSb) is suitable for such an application.
- the inductors 10 can be single-phase or multi-phase, preferably three-phase. As indicated above, they generate a progressive sinusoidal induction wave at the level of the annular elements 2. This induction wave is called inductive or primary wave. This wave in relative motion with respect to the thermoelectric material induced in each annular element 2 a system of polyphase currents closing in on themselves. These currents in turn create a progressive sinusoidal distribution of induction called the secondary wave or armature reaction. This second wave is stationary with respect to the first. Everything takes place here as in an electro-mechanical converter implementing two progressive or rotating fields of the same speed. The system described can operate as a generator or a receiver.
- the system When the transport parameter of the material constituting the annular elements 2 is greater than the speed of the primary field, the system operates as a generator. It works as a receiver otherwise.
- the electrical energy exchanged between the network and the device shown in the drawing appears in the inductors 10, so that there is no electrical contact between the armature and any other part of the device.
- the transport parameter in question here has the dimensions of a speed. It corresponds to N. VT where N is the Nernst coefficient and where VT is the temperature gradient.
- N the Nernst coefficient
- VT the temperature gradient.
- N the Nernst coefficient
- VT the temperature gradient.
- H. Nakamura, K. Ikeda, S Yamaguchi, and K. Kuroda Transport coefficients of thermoelectric semiconductor InSb in the magnetic field, J. Adv. Sc, 8 (1996), 153 (in
- the generator which can also operate as a galvanothermomagnetic asynchronous receiver according to the invention operates according to the same principle as a linear transformer whose secondary winding is a short circuit.
- this generator has a linear structure because the inductors produce a sliding induction.
- the armature is fixed.
- the linear armature of this device consists of annular elements ( Figure 1) or a tube ( Figure 2), the induced currents flowing in the mass of these elements or this tube.
- the generator according to the invention preferably uses two inductors which face each other. It is also possible, as in FIGS. 1 and 2, to have an inductor facing a magnetic core 4. Such an arrangement has the advantage of facilitating on the one hand the flux in the magnetic circuit and on the other hand increasing induction in the air gap. This achieves a greater gap thickness.
- the linear generator according to the invention can have one or the other of the following two static arrangements:
- the generator is then called "with long inductor”
- the inductor is shorter than the armature which is then assumed to be infinitely long: the generator is then called "with short inductor”.
- the annular elements 2 are replaced by a tube 14.
- a magnetic core 4 placed in the center of the tube 14, the assembly formed by the core and the tube being surrounded by inductors 10 regularly distributed around the periphery of the tube.
- inductors 10 regularly distributed around the periphery of the tube.
- the tube is here also preferably made of indium antimonide.
- Other materials such as tellurides and selenides of lead, bismuth and antimony or even certain alloys of silicon and germanium can be used. Of course, this list is not exhaustive.
- the inductors are supplied here, preferably three-phase, so as to create a progressive magnetic wave in the tube 14.
- the latter therefore absorb, on the one hand, the reactive power PR and, on the other hand, supply active power P A supplied by the electric field created in the thermoelectric material.
- FIG 3 shows an alternative embodiment comparable to the embodiment shown in Figure 2.
- the magnetic core is replaced by inductors 10 '.
- the operation of this device is then similar to that described above with reference to Figure 2.
- an insulating jacket 16 The latter is intended to thermally insulate the thermoelectric tube 14 so as not to degrade the temperature gradient.
- the material chosen for the production of the insulating envelope 16 is a magnetically permeable material.
- FIG. 4 shows an electrical diagram (extracted from the above-mentioned article) of a device making it possible to carry out such self-excitation. It is considered here that the generator operates in three-phase mode. We then represent three inductance coils L, to each of these coils corresponding to a phase three-phase current. The coils shown here are coils of an inductor 10 (or 10 ') of Figures 1 to 3.
- Each coil is not a pure inductance, there is also shown a resistance r corresponding to each coil.
- V is the speed of the traveling wave generated by the coils in the thermoelectric material constituting the tube 14. It is substantially parallel to the temperature gradient VT.
- the values C and R correspond to capacities and resistances. They define, with the value L of the inductance of the coils, the pulsation of the oscillations creating a magnetic field in the tube 14. To increase the efficiency of the device, it is possible to use superconductive coils to produce the inductors 10.
- thermoelectric material preferably planar circular. On both sides of the latter, inductors then extend radially.
- thermoelectric disc sandwiched between two arrays of inductors arranged in a star. The temperature gradient is also then radial.
- the disc of thermoelectric material can be hollowed out at its center.
- the present invention is not limited to the embodiments and to their variants described above by way of nonlimiting examples. It also relates to all variant embodiments within the reach of those skilled in the art within the scope of the claims below.
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004564307A JP2006512885A (ja) | 2002-12-27 | 2003-12-24 | 電流磁気発熱効果を持つ非同期発電機 |
EP03814491A EP1584112B1 (fr) | 2002-12-27 | 2003-12-24 | Générateur asynchrone à effet galvanomagnétothermique |
DE60315195T DE60315195T2 (de) | 2002-12-27 | 2003-12-24 | Asynchroner generator mit galvanomagnetothermischem effekt |
AU2003303660A AU2003303660A1 (en) | 2002-12-27 | 2003-12-24 | Asynchronous generator with galvano-magnetic-thermal effect |
US11/166,352 US7439629B2 (en) | 2002-12-27 | 2005-06-27 | Asynchronous generator with galvano-magnetic-thermal effect |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/16754 | 2002-12-27 | ||
FR0216754A FR2849540B1 (fr) | 2002-12-27 | 2002-12-27 | Generateur asynchrone a effet galvanomagnetothermique |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/166,352 Continuation US7439629B2 (en) | 2002-12-27 | 2005-06-27 | Asynchronous generator with galvano-magnetic-thermal effect |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004061984A1 true WO2004061984A1 (fr) | 2004-07-22 |
Family
ID=32480223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/003894 WO2004061984A1 (fr) | 2002-12-27 | 2003-12-24 | Generateur asynchrone a effet galvanomagnetothermique |
Country Status (9)
Country | Link |
---|---|
US (1) | US7439629B2 (fr) |
EP (1) | EP1584112B1 (fr) |
JP (1) | JP2006512885A (fr) |
CN (1) | CN1745484A (fr) |
AT (1) | ATE368303T1 (fr) |
AU (1) | AU2003303660A1 (fr) |
DE (1) | DE60315195T2 (fr) |
FR (1) | FR2849540B1 (fr) |
WO (1) | WO2004061984A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010026260A2 (fr) * | 2008-09-08 | 2010-03-11 | Bhp Billiton Aluminium Technologies Limited | Dispositif thermomagnétique |
JP5278486B2 (ja) * | 2011-04-25 | 2013-09-04 | 株式会社デンソー | 熱磁気エンジン装置、および可逆熱磁気サイクル装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1208159A (fr) * | 1958-12-09 | 1960-02-22 | Générateur électro-thermique réversible | |
US3084267A (en) * | 1960-07-19 | 1963-04-02 | Sperry Rand Corp | Converter of heat into electrical energy |
DE2404786A1 (de) * | 1974-02-01 | 1975-08-07 | Josef Haeringer | Thermomagnetischer generator |
EP0644599A2 (fr) * | 1993-09-17 | 1995-03-22 | Uninet Co., Ltd. | Dispositif pour la production de l'énergie thermoélectrique |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004393A (en) * | 1960-04-15 | 1961-10-17 | Westinghouse Electric Corp | Thermoelectric heat pump |
US3386255A (en) * | 1967-02-27 | 1968-06-04 | Borg Warner | Thermoelectric system with improved energizing network |
US3664881A (en) * | 1969-08-26 | 1972-05-23 | Wesley Love | Thermomagnetic device |
US4467611A (en) * | 1982-12-13 | 1984-08-28 | Marlow Industries, Inc. | Thermoelectric power generating device |
US5024059A (en) * | 1990-06-20 | 1991-06-18 | Noble Jerry D | Electronic force ionized gas air conditioning system compressor |
US5593509A (en) * | 1995-03-17 | 1997-01-14 | Lockheed Idaho Technologies Company | Portable thermo-photovoltaic power source |
US5780954A (en) * | 1997-01-22 | 1998-07-14 | Davis; Edwin D. | Thermionic electric converters |
RU2245497C2 (ru) * | 2001-02-21 | 2005-01-27 | Синтос Системс ОЮ | Способ преобразования энергии и вихревая труба грицкевича для его осуществления |
US20050022855A1 (en) * | 2003-07-30 | 2005-02-03 | Raver Bernard J. | Thermoelectric power generator for a gas turbine engine |
US20050139248A1 (en) * | 2003-12-30 | 2005-06-30 | Strnad Richard J. | Thermoelectricity generator |
JP2005223132A (ja) * | 2004-02-05 | 2005-08-18 | Toyota Motor Corp | 内燃機関の熱電発電装置 |
-
2002
- 2002-12-27 FR FR0216754A patent/FR2849540B1/fr not_active Expired - Fee Related
-
2003
- 2003-12-24 AU AU2003303660A patent/AU2003303660A1/en not_active Abandoned
- 2003-12-24 EP EP03814491A patent/EP1584112B1/fr not_active Expired - Lifetime
- 2003-12-24 JP JP2004564307A patent/JP2006512885A/ja active Pending
- 2003-12-24 DE DE60315195T patent/DE60315195T2/de not_active Expired - Fee Related
- 2003-12-24 AT AT03814491T patent/ATE368303T1/de not_active IP Right Cessation
- 2003-12-24 WO PCT/FR2003/003894 patent/WO2004061984A1/fr active IP Right Grant
- 2003-12-24 CN CN200380109270.6A patent/CN1745484A/zh active Pending
-
2005
- 2005-06-27 US US11/166,352 patent/US7439629B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1208159A (fr) * | 1958-12-09 | 1960-02-22 | Générateur électro-thermique réversible | |
US3084267A (en) * | 1960-07-19 | 1963-04-02 | Sperry Rand Corp | Converter of heat into electrical energy |
DE2404786A1 (de) * | 1974-02-01 | 1975-08-07 | Josef Haeringer | Thermomagnetischer generator |
EP0644599A2 (fr) * | 1993-09-17 | 1995-03-22 | Uninet Co., Ltd. | Dispositif pour la production de l'énergie thermoélectrique |
Also Published As
Publication number | Publication date |
---|---|
ATE368303T1 (de) | 2007-08-15 |
FR2849540A1 (fr) | 2004-07-02 |
FR2849540B1 (fr) | 2005-03-04 |
AU2003303660A1 (en) | 2004-07-29 |
US7439629B2 (en) | 2008-10-21 |
EP1584112B1 (fr) | 2007-07-25 |
US20060181270A1 (en) | 2006-08-17 |
DE60315195D1 (de) | 2007-09-06 |
EP1584112A1 (fr) | 2005-10-12 |
JP2006512885A (ja) | 2006-04-13 |
DE60315195T2 (de) | 2008-04-03 |
CN1745484A (zh) | 2006-03-08 |
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