WO2013034139A1 - Procédé et dispositif de stockage et de récupération d'une énergie thermique - Google Patents

Procédé et dispositif de stockage et de récupération d'une énergie thermique Download PDF

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Publication number
WO2013034139A1
WO2013034139A1 PCT/DE2012/100214 DE2012100214W WO2013034139A1 WO 2013034139 A1 WO2013034139 A1 WO 2013034139A1 DE 2012100214 W DE2012100214 W DE 2012100214W WO 2013034139 A1 WO2013034139 A1 WO 2013034139A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
heat
storage medium
temperature
medium
Prior art date
Application number
PCT/DE2012/100214
Other languages
German (de)
English (en)
Inventor
Christian Paul
Camille Bachelier
Original Assignee
Novatec Solar 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 Novatec Solar Gmbh filed Critical Novatec Solar Gmbh
Publication of WO2013034139A1 publication Critical patent/WO2013034139A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • F28D20/0039—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material with stratification of the heat storage material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00—Arrangements for storing heat collected by solar heat collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00—Arrangements for storing heat collected by solar heat collectors
    • F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the present invention relates to a process for the spoke ⁇ tion of thermal energy, a method for recovering thermal energy and a device for the storage and recovery of thermal energy with a too in a bypass line between a heat transfer medium inlet and a heat transfer medium return line or by a steam turbine, which is a Assigned to the heat exchanger is passed through the primary side of the heat transfer medium, while through the secondary side, a heat storage medium between a hot storage and a cold storage and can be derived.
  • Such methods and apparatus are be ⁇ already known from the prior art in many ways.
  • Such systems are, for example, in solar thermal power plants ⁇ as Andasol 1, 2 and 3 in Spain used for electricity generation ⁇ supply after sunset.
  • the heat transfer ⁇ medium in the art usually a synthetic oil, using a heat exchanger transferred to a heat storage medium, which is transferred in the course of the transfer of a cold storage in a hot storage.
  • the thermal storage ⁇ chermedium is thereby heated by the heat transfer and maintained in the hot storage until further notice.
  • ge ⁇ go so out the hot heat storage medium through the heat exchanger back into the cold storage and heated this primary side run through the heat exchanger heat transfer medium again.
  • this heated heat transfer medium in turn, for example, turbines can be operated, which provide the desired electrical energy available.
  • the use of such a system for water or steam is still in development and brings various ⁇ dene technical and economic challenges.
  • the maximum achievable temperature of the heat storage medium would be approximately 310 ° C. when the hot storage medium is charged by means of superheated steam at 450 ° C.
  • the maxi ⁇ times attainable temperature of the discharge at the Spei ⁇ chers say, the recovery of the energy resulting vapor is limited to about 305 ° C. In a power plant process, this would severely limit the performance and efficiency of the steam cycle.
  • the present invention therefore has as its object to provide a method and a device for storing and recovering thermal energy, especially in solar thermal power plants, which makes the existing solutions with steam as the only heat storage medium significantly more efficient than a mere takeover of the known Lö ⁇ sungen, and at the same time dispensed with the use of additional, additional heat storage media.
  • the solution of the prior art to a so-called intermediary memory so an additional, arranged in the middle temperature range memory to supplement, in which the storage thermal energy heated heat storage medium is introduced.
  • a portion of this heat storage medium will, however OF INVENTION ⁇ dung according diverted and further heated again through another, designed as a high temperature heat exchanger additional heat exchanger again. Due to the fact that the heating only refers to a partial flow of the heat storage medium in this second heat exchanger, a much stronger heating is possible.
  • lead heat transfer medium usually a medium of liquid salt
  • pre-heated heat storage medium are particularly strongly heated in the second stage by using the superheated steam, which is provided for heat storage, which already carried the cooled steam, a very high heating of this part-stream of the heat storage medium is made possible due to the ge ⁇ ringeren amount of heat storage medium.
  • a fourth memory that is to say a second intermediate memory, can also be added, as can a third heat exchanger. This makes it possible to use the rise of the boiling curve before the boiling point also more effectively by anticipating a corresponding preheating of the bulk of the heating in the boiling range of the vapor.
  • Layer can be regarded as a single memory.
  • FIG. 1 is a schematic representation of a prior art two-tank salt storage system
  • Figure 2 is a graph relating to the curves for
  • Figure 3 is a schematic representation of he ⁇ inventive storage system
  • Figure 4 is a graph relating to the curves for
  • FIG. 1 shows a schematic representation of a bypass between a line which leads from a solar steam generator 1 to a steam turbine 2.
  • Such an arrangement is usually operated with synthetic oil and not with steam. It is now, however, the effect of an operation with steam as a heat transfer medium be ⁇ wrote to then he ⁇ invention to illustrate the operation of the.
  • the bypass line 8 includes a heat exchanger 12, through the primary side 9 of the initially superheated steam from the solar steam generator 1 emits its heat energy in the furnishedtau ⁇ shear 12 to a heat storage medium.
  • the heat storage medium is simultaneously pumped in the opposite direction of a cold storage 6 through the secondary side 10 of the heat exchanger 12 in a hot accumulator 5, wherein it takes heat energy of the heat transfer medium, ie the steam, in the heat exchanger 12 ⁇ .
  • the heat ⁇ storage medium flows through the heat exchanger 12 in the cold accumulator 6 and thereby outputs the heat contained in the furnished umanmedi ⁇ from.
  • the heated heat transfer medium then flows to the steam turbine 2 and is used to generate electrical energy.
  • the heat transfer medium In order to ensure the heat transfer in the heat exchanger 12 when loading the hot accumulator 5, the heat transfer medium must have a higher temperature than the heat storage medium. When discharging the hot accumulator 5, this is exactly the opposite. Accordingly, the temperatures of the heat transfer medium before loading and after discharge are always different.
  • the vapor flow discharge curve represents the temperature of the vapor stream above the transmitted thermal energy, showing a distinct kinking shape.
  • the example in the range between approximately 3000 and 4000 kW is superheated steam, which leads to a decrease in temperature when energy is released. In the range of about 300 to 3000 kW, a temperature change is virtually unnoticeable, while below 300 kW, the temperature drops further.
  • the curve relating to the loading of the steam stream 14 behaves between these two cures, the corresponding curve of the salt ⁇ melt stream 15, ie the characteristic of the heat storage medium ⁇ ums shown. This lies between the other two curves, after one hand, the heat storage medium from the heat transfer medium can not be heated more than its own temperature and vice versa, this also applies to the recovery of energy also.
  • FIG. 3 shows the arrangement according to the invention, which provides an additional intermediate memory 7 between the hot storage 5 and the cold storage 6. Also, this is no longer a solution with a heat exchanger 12, but rather with two heat exchangers 3 and 4.
  • the heat transfer medium is at its discharge or loading of the heat storage medium initially the superheated steam via the bypass line 8 in the high-temperature heat ⁇ 4 enter. After crossing it, the meanwhile cooled steam is then transferred again in the low-temperature heat exchanger 3 heat to the heat storage medium and condense. In the reverse direction, during the loading of the heat storage medium, this first pumped from the cold storage 6 in the low-temperature heat exchanger 3 and then divided into two mass flows.
  • the efficiency of the overall arrangement can be improved according to the graph in Figure 4, after it is pos ⁇ lich to bend the curve of the molten salt stream in the range from about 3500 kW upwards, so with the entry into the heat exchanger 4 a much greater heating too realize.
  • This has a significant effect on the vapor flow loading curve, as a result of which the result is a significantly higher steam temperature, which markedly improves the efficiency of the steam turbines 2.
  • a vertical line at 3500 kW separates the area passing through the heat exchanger 3 is reached by the area of the heat exchanger 4.
  • Described above thus provides a process and apparatus for the storage and recovery of thermal energy, which in result by a splitting of the mass ⁇ flow of the heat storage medium and the repeated Further ⁇ overheating, only a portion of this mass flow over ⁇ superheated steam to store significantly more heat and thereby a much better efficiency in the recovery of energy is able to achieve.

Abstract

L'invention concerne un procédé et un dispositif de stockage et de récupération d'une énergie thermique. Selon lesdits procédés de stockage et de récupération d'une énergie thermique connus, un milieu caloporteur chauffé communique aux périodes excédentaires avec un milieu d'accumulation de chaleur par l'intermédiaire d'un échangeur de chaleur. En raison du comportement habituel de la vapeur, ce procédé mis en œuvre au moyen d'une huile synthétique ne peut être transféré directement sur un générateur de vapeur solaire, car la vapeur qui y est utilisée en tant que milieu caloporteur dans la plage de la température d'ébullition peut absorber ou dégager de grandes quantités d'énergie, sans que la température en soit modifiée. Un transfert de chaleur sur le milieu d'accumulation de chaleur ne serait possible que dans une proportion insatisfaisante. L'invention pallie cela par le fait qu'une division du milieu d'accumulation de chaleur s'effectue en aval d'un échangeur de chaleur à basse température, de sorte qu'une proportion du milieu d'accumulation de chaleur peut être chauffée dans un échangeur de chaleur à haute température d'une façon nettement plus intense. Cela permet d'exploiter nettement mieux la capacité de la vapeur et donc de rendre le fonctionnement des turbines à vapeur raccordées considérablement plus efficace.
PCT/DE2012/100214 2011-09-06 2012-07-16 Procédé et dispositif de stockage et de récupération d'une énergie thermique WO2013034139A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011053322.2 2011-09-06
DE102011053322A DE102011053322A1 (de) 2011-09-06 2011-09-06 Verfahren und Vorrichtung zur Speicherung und Rückgewinnung von thermischer Energie

Publications (1)

Publication Number Publication Date
WO2013034139A1 true WO2013034139A1 (fr) 2013-03-14

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DE (1) DE102011053322A1 (fr)
WO (1) WO2013034139A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016180923A1 (fr) 2015-05-13 2016-11-17 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif de stockage d'énergie thermique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012103544U1 (de) * 2012-09-18 2013-12-20 Technische Universität Chemnitz System zur Erzeugung von Heißwasser und/oder Dampf mit Hochtemperaturspeicher für den Einsatz in einem Gasturbinenkraftwerk
DE102013101648A1 (de) 2013-02-19 2014-08-21 Novatec Solar Gmbh Verfahren und Vorrichtung zur Speicherung und Übertragung von thermischer Energie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119143A (en) * 1975-09-22 1978-10-10 Scientific-Atlanta, Inc. Heat transfer system
EP2157317A2 (fr) * 2008-08-19 2010-02-24 ABB Research LTD Système de stockage d'énergie thermoélectrique et procédé de stockage d'énergie thermoélectrique
EP2275649A1 (fr) * 2009-06-18 2011-01-19 ABB Research Ltd. Système de stockage d'énergie thermoélectrique avec un réservoir de stockage intermédiaire et procédé de stockage d'énergie thermoélectrique
WO2011076410A1 (fr) * 2009-12-23 2011-06-30 Krones Ag Dispositif et procédé de récupération d'énergie

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Publication number Priority date Publication date Assignee Title
DE2937632C2 (de) * 1979-09-18 1988-07-28 Karl 7710 Donaueschingen Honer Warmwasserspeicher
NL1023012C2 (nl) * 2003-03-25 2004-09-30 Econcern B V Werkwijze voor het opslaan en onttrekken van warmte en koude in respectievelijk aan een reservoir.
DE10343544B4 (de) * 2003-09-19 2008-05-08 Pflanz, Tassilo, Dipl.-Ing. Kraftwerksanlage zur Nutzung der Wärme eines geothermischen Reservoirs
DE102008036527B4 (de) * 2008-08-06 2010-09-30 Flagsol Gmbh Thermischer Energiespeicher
DE102009000392A1 (de) * 2009-01-23 2010-07-29 Robert Bosch Gmbh Klimatisierung elektrochemischer Energiespeicher mittels regelbarer Latentwärmespeicher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119143A (en) * 1975-09-22 1978-10-10 Scientific-Atlanta, Inc. Heat transfer system
EP2157317A2 (fr) * 2008-08-19 2010-02-24 ABB Research LTD Système de stockage d'énergie thermoélectrique et procédé de stockage d'énergie thermoélectrique
EP2275649A1 (fr) * 2009-06-18 2011-01-19 ABB Research Ltd. Système de stockage d'énergie thermoélectrique avec un réservoir de stockage intermédiaire et procédé de stockage d'énergie thermoélectrique
WO2011076410A1 (fr) * 2009-12-23 2011-06-30 Krones Ag Dispositif et procédé de récupération d'énergie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016180923A1 (fr) 2015-05-13 2016-11-17 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif de stockage d'énergie thermique
FR3036177A1 (fr) * 2015-05-13 2016-11-18 Commissariat Energie Atomique Dispositif de stockage d'energie thermique

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