EP2557372A1 - Accumulateur d'énergie thermoélectrique - Google Patents

Accumulateur d'énergie thermoélectrique Download PDF

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Publication number
EP2557372A1
EP2557372A1 EP11009124A EP11009124A EP2557372A1 EP 2557372 A1 EP2557372 A1 EP 2557372A1 EP 11009124 A EP11009124 A EP 11009124A EP 11009124 A EP11009124 A EP 11009124A EP 2557372 A1 EP2557372 A1 EP 2557372A1
Authority
EP
European Patent Office
Prior art keywords
storage medium
heat
heating element
storage
induction coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11009124A
Other languages
German (de)
English (en)
Inventor
André Dr. Biegner
Robert Dr. Eckl
Thomas Hecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP2557372A1 publication Critical patent/EP2557372A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F24H7/04—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
    • F24H7/0408—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply
    • F24H7/0433—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply the transfer medium being water

Definitions

  • the invention relates to a heat accumulator with a storage medium, a transfer device with which heat can be transferred to the storage medium, as well as a removal device, with the heat from the storage medium can be removed.
  • the demand for electricity is not constant in terms of time but has a daily, weekday-dependent and seasonal load profile.
  • thermoelectric energy storage devices which in principle can be built and operated at any location and thus contribute to the integration of renewable energies into the existing infrastructure while avoiding grid expansion.
  • thermoelectric energy storage converts electrical energy into heat and then passes this into a heat storage, from which they are removed again with a time lag and z. B. can be converted back into electrical energy via a steam turbine process.
  • the heat storage has as a storage medium, a liquid, such as a salt or molten metal, or solids, such as natural or refractory bricks, on. To minimize energy losses, the storage medium is thermally isolated from the environment.
  • the heating conductors can be arranged so that they surround the storage medium or are surrounded by storage medium.
  • the first case only the outer surface of the storage medium is available for heat transfer.
  • the heating conductors are arranged inside the storage medium, the effect described above does not occur because the heat transfer area can be increased linearly with the volume of the storage medium.
  • a disadvantage of this arrangement that in the case of electrical and / or mechanical damage to the heating conductors under certain circumstances, the storage medium must be removed with great technical and time required before a repair can be performed.
  • Object of the present invention is therefore to provide a heat accumulator of the generic type, which overcomes the disadvantages of the prior art.
  • the stated object is achieved in that the transmission device, an induction coil and an electrically conductive Heating element which is in direct contact with the storage medium, so that heat between the heating element and storage medium can be exchanged.
  • the induction coil is traversed by an alternating electrical current, which generates an alternating magnetic field.
  • the electrically conductive heating element which is electrically insulated from the induction coil, is arranged so that eddy currents can be induced in it by the alternating magnetic field, which lead to heating of the heating element due to the ohmic losses. If the heating element consists of a ferromagnetic material, such as an iron-silicon or an iron-nickel alloy or ⁇ -metal, so carry beyond Ummagnetmaschineshuse to heat the heating element and thus to form a temperature gradient between the heating element and storage medium.
  • the heat accumulator according to the invention thus makes it possible to convert electrical energy into heat and to store it.
  • the power with which heat can be transferred to the storage medium via the heating element increases with the amplitude of the magnetic field strength at the location of the heating element. Since this amplitude is greatest within the induction coil, the heating element is usefully placed inside the induction coil.
  • a heating element has the shape of a straight rod. It is also conceivable, for example, to perform a heating element as a ribbed rod or tube or as a ball.
  • the heat accumulator according to the invention may comprise more than one electrically conductive heating element, wherein each of the heating elements is in direct contact with the storage medium.
  • a plurality of heating elements are distributed in the storage medium and adapted in their geometries and dimensions so that the most homogeneous heating of the storage medium is possible, and inactive, not or only insufficiently involved in the heat storage areas are avoided.
  • the heat accumulator may, for. B. comprise a matrix or grid structure, with the help of which the heating elements distributed approximately homogeneously in the storage medium and their positions are fixed simultaneously.
  • an expedient embodiment of the invention provides that the device for removing heat from the storage medium is designed as a heating element.
  • a device is a straight tube surrounded by storage medium, which is preferably made of a ferromagnetic material, such as an iron-nickel alloy.
  • a preferred embodiment of the heat exchanger according to the invention provides that the induction coil is arranged outside a storage container containing the storage medium.
  • the induction coil is relatively easily accessible and can be repaired in the event of a malfunction, without, for example, the storage medium must be removed.
  • the container containing the storage medium of a non-electrically conductive material, such.
  • the storage container is disposed within the induction coil, whereby the induction coil at least partially surrounds the storage medium.
  • the storage container made of an electrically conductive material, so that currents are induced in the storage tank.
  • the heat generation or heat input into the storage material is then divided depending on the material properties and geometry between the container wall and one or more heating elements.
  • the invention provides for the storage medium to be surrounded by a heat-insulating housing, which can be designed as single or multi-shell.
  • a heat-insulating housing which can be designed as single or multi-shell.
  • the possibility should not be excluded to surround the induction coil with one or more heat-insulating layers and thus to thermally isolate from the environment.
  • the heat accumulator according to the invention comprises as a storage medium a molten salt (for example KNO 3 , NaNO 3 ), as used for example for heat storage in solar thermal power plants.
  • a molten salt for example KNO 3 , NaNO 3
  • other molten salts eg thiosulfates
  • Liquids such as water or oils, or solids, such as sand or concrete, or gases, such as air, or mixtures of solids and / or liquids and / or gases can be used as a storage medium.
  • phase change materials such as phase change materials or PCM
  • phase change materials such as paraffins
  • FIG. 1 schematically illustrated embodiment.
  • the FIG. 1 shows a heat accumulator with an induction coil, within which a storage medium is arranged.
  • the heat storage S comprises an induction coil I, in the interior of which a storage container E is located.
  • the storage container E which contains a storage medium M and a heating element H, is equipped with a removal device R, can be removed via the heat from the storage medium M.
  • the heating element H is made of a ferromagnetic material
  • the storage container E is made of a non-ferromagnetic material, such as concrete, and therefore can be penetrated by magnetic fields.
  • the induction coil I is connected to an alternating current source W, so that an alternating magnetic field can be generated, which has its greatest field strength at the location of the heating element H, in which it induces eddy currents.
  • a heat transfer medium 1 such as a thermal oil or water, with a temperature which is lower than the temperature of the storage medium M in the removal device R and passed through the storage container E are performed. Due to the temperature difference, the heat transfer medium 1 withdraws heat from the storage medium M, so that a warmed-up heat transfer medium 2 can be withdrawn from the heat accumulator.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)
EP11009124A 2011-08-09 2011-11-17 Accumulateur d'énergie thermoélectrique Withdrawn EP2557372A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011109779A DE102011109779A1 (de) 2011-08-09 2011-08-09 Thermoelektrischer Energiespeicher

Publications (1)

Publication Number Publication Date
EP2557372A1 true EP2557372A1 (fr) 2013-02-13

Family

ID=45217121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11009124A Withdrawn EP2557372A1 (fr) 2011-08-09 2011-11-17 Accumulateur d'énergie thermoélectrique

Country Status (2)

Country Link
EP (1) EP2557372A1 (fr)
DE (1) DE102011109779A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2833092A3 (fr) * 2013-08-01 2015-03-18 Dieter Schluckebier Procédé et dispositif de stockage d'énergie
ES2536592A1 (es) * 2013-11-26 2015-05-26 Enolcon Gmbh Acumulador de calor de alta temperatura con calefacción por inducción y metal fundido y sistema de interconexión de acumuladores de calor
GB2559779A (en) * 2017-02-17 2018-08-22 Anthony Richardson Nicholas System and method of supplying steam
EP3907458A1 (fr) 2020-05-07 2021-11-10 Marek Praciak Unité intégrée de chauffage et de stockage thermique, ensemble d'unités intégrées de chauffage et de stockage thermique et prodédé de commande de celles-ci
IT202200005471A1 (it) * 2022-03-21 2023-09-21 Rudi Foini Dispositivo di nebulizzazione e metodo di scambio termico abbreviato per vaporizzazione sostanza liquida
EP4253893A1 (fr) * 2022-03-30 2023-10-04 Uros Ravljen Dispositif de stockage d'énergie photovoltaïque et procédé de stockage d'énergie photovoltaïque utilisant ledit dispositif
SE2251376A1 (en) * 2022-11-25 2024-05-26 Texel Energy Storage Ab Electric energy storage device
SE2251375A1 (en) * 2022-11-25 2024-05-26 Texel Energy Storage Ab Electric energy storage device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012210957A1 (de) * 2012-06-27 2014-01-02 Enolcon Gmbh Hochtemperatur-Wärmespeicher mit Induktionsheizung und Metallschmelze und Wärmespeicher-Verbundsystem
DE102016119668A1 (de) * 2016-10-14 2018-04-19 Heinrich Graucob Induktiver Wärmespeicher und Verfahren zur Umwandlung von thermischer Energie in elektrische Energie
DE102017217963A1 (de) * 2017-10-09 2019-04-11 Deutsches Zentrum für Luft- und Raumfahrt e.V. Wärmespeichervorrichtung und Verfahren zum Speichern von Wärme
DE102019207967A1 (de) * 2019-05-29 2020-12-03 Deutsches Zentrum für Luft- und Raumfahrt e.V. Wärmespeichervorrichtung und Verfahren zum Speichern und/oder Übertragen von Wärme
DE102019120448B4 (de) * 2019-07-29 2024-03-07 Kraftanlagen München Gmbh Wärmespeichervorrichtung, Wärmespeichersystem und Verfahren zum Betreiben einer Wärmespeichervorrichtung
DE102022107240A1 (de) 2022-03-28 2023-09-28 Deutsches Zentrum für Luft- und Raumfahrt e.V. Wärmespeicheranordnung und Verfahren zur Speicherung und/oder Übertragung von Wärme
DE102022204303A1 (de) 2022-05-02 2023-11-02 Heuft Besitzgesellschaft Gmbh & Co. Kg Hochtemperatur-Thermoöl-Wärmespeicher

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596034A (en) * 1969-12-08 1971-07-27 Hooker Chemical Corp Heat storage
DE2117103A1 (de) * 1971-04-07 1972-10-26 Vitt, Gerhard, 5070 Bergisch Glad bach, Baur, Eduard, Dipl Ing , 5256 Waldbruch Verfahren und Vorrichtung zum Erzeu gen eines erhitzten Mediums fur Beheizungs zwecke
DE2145097A1 (de) * 1971-09-09 1973-03-22 Gerhard Vitt Vorrichtung zum erzeugen eines erhitzten mediums fuer beheizungszwecke

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596034A (en) * 1969-12-08 1971-07-27 Hooker Chemical Corp Heat storage
DE2117103A1 (de) * 1971-04-07 1972-10-26 Vitt, Gerhard, 5070 Bergisch Glad bach, Baur, Eduard, Dipl Ing , 5256 Waldbruch Verfahren und Vorrichtung zum Erzeu gen eines erhitzten Mediums fur Beheizungs zwecke
DE2145097A1 (de) * 1971-09-09 1973-03-22 Gerhard Vitt Vorrichtung zum erzeugen eines erhitzten mediums fuer beheizungszwecke

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2833092A3 (fr) * 2013-08-01 2015-03-18 Dieter Schluckebier Procédé et dispositif de stockage d'énergie
ES2536592A1 (es) * 2013-11-26 2015-05-26 Enolcon Gmbh Acumulador de calor de alta temperatura con calefacción por inducción y metal fundido y sistema de interconexión de acumuladores de calor
GB2559779A (en) * 2017-02-17 2018-08-22 Anthony Richardson Nicholas System and method of supplying steam
GB2559779B (en) * 2017-02-17 2021-10-13 Anthony Richardson Nicholas System and method of supplying steam
EP3907458A1 (fr) 2020-05-07 2021-11-10 Marek Praciak Unité intégrée de chauffage et de stockage thermique, ensemble d'unités intégrées de chauffage et de stockage thermique et prodédé de commande de celles-ci
IT202200005471A1 (it) * 2022-03-21 2023-09-21 Rudi Foini Dispositivo di nebulizzazione e metodo di scambio termico abbreviato per vaporizzazione sostanza liquida
EP4253893A1 (fr) * 2022-03-30 2023-10-04 Uros Ravljen Dispositif de stockage d'énergie photovoltaïque et procédé de stockage d'énergie photovoltaïque utilisant ledit dispositif
SE2251376A1 (en) * 2022-11-25 2024-05-26 Texel Energy Storage Ab Electric energy storage device
SE2251375A1 (en) * 2022-11-25 2024-05-26 Texel Energy Storage Ab Electric energy storage device

Also Published As

Publication number Publication date
DE102011109779A1 (de) 2013-02-14

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