EP2603746A1 - Fluide caloporteur, utilisation correspondante et procédé pour faire fonctionner une centrale héliothermique - Google Patents

Fluide caloporteur, utilisation correspondante et procédé pour faire fonctionner une centrale héliothermique

Info

Publication number
EP2603746A1
EP2603746A1 EP11751901.7A EP11751901A EP2603746A1 EP 2603746 A1 EP2603746 A1 EP 2603746A1 EP 11751901 A EP11751901 A EP 11751901A EP 2603746 A1 EP2603746 A1 EP 2603746A1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
transfer medium
water
mixture
medium according
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Withdrawn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
EP11751901.7A
Other languages
German (de)
English (en)
Inventor
Matthias ÜBLER
Peter GRÖPPEL
Pascal Heilmann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2603746A1 publication Critical patent/EP2603746A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/20—Working fluids specially adapted for solar heat collectors
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D15/00—Lithium compounds
    • C01D15/04—Halides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D15/00—Lithium compounds
    • C01D15/10—Nitrates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/02—Fluorides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/36—Nitrates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials
    • C09K5/12—Molten materials, i.e. materials solid at room temperature, e.g. metals or salts
    • 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
    • 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
    • F28D20/003—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
    • 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
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight

Definitions

  • the invention relates to a heat transfer medium, in particular for use in solar thermal power plants, and a method for operating a solar thermal power plant.
  • Solar thermal power plant concepts commonly use solar energy to heat via jet concentration and condensing mechanisms, such as a plurality of cascaded mirror geometries, a heat transfer fluid or heat transfer fluid ("HTF") within an extensive absorber tube cycle, which then converts to water vapor of high pressure via a heat exchange process liquid water from a reservoir, thus to generate electricity by means of a turbine.
  • HTF heat transfer fluid
  • the Tokühl ⁇ te HTF passes through the heating process, by solar energy and re-ensures a continuous power generation.
  • the HTF should have a high fluidically dmaschine. Simultaneously, the HTF should be in cash inflow was a high thermal conductivity and high specific Were ⁇ mekapaztician unite in itself. All these factors deterministic minie ⁇ ren mainly the electricity production costs of future solar thermal power plants, so the timing of the economic cost parity and competitiveness of such plants.
  • Object of the present invention is therefore to improve be ⁇ knew preferably eutectic nitrate salt mixtures so that a lower melting point at a comparable to the Solar Salt thermal stability and viscosity, at least a viscosity that permits application in solar thermal power plants, the Salt is created.
  • the subject of the present invention is a heat transfer medium for solar power plants, which can store water, wherein the absorption of water into the medium exo ⁇ therm takes place and the discharge of water endothermic.
  • the invention also relates to a method for operating a solar thermal system, wherein a heat transfer medium is used which stores heat when irradiated by solar radiation and continuously releases water, wherein the discharged water is separated by condensation from the liquid heat transfer medium and stored, where necessary
  • the stored water can be added to the heat transfer medium again, which form again in an exothermic reaction, the salt hydrates and retained by the heat energy released, the liquidity of the furnished exclusivelytragme ⁇ dium.
  • the invention relates to the use of the heat transfer medium in solar
  • object of the invention is a heat transfer medium based on a mixture of two or more components, one or more components are incorporated as Salzhyd ⁇ Ratie) of the mixture without decomposition, and thermally from the compounds dehydratable
  • non-toxic, temperature stable, (crystal) anhydrous nitrates of the cation types sodium (Na +), potassium (K +) and calcium (Ca2 +), can be a expert and literature known HTF mixture with a melting point of 133 ° C reali ⁇ sieren.
  • anhydrous calcium nitrate Ca (NO 3) 2 by the clear bil ⁇ ligere, containing water of crystallization tetrahydrate derivative
  • a mixture is obtained by such a mixture, which forms a semi- or partially liquid phase mixture far below 133 ° C., since the liquid calcium nitrate tetrahydrate is used as solvent for heating above 45 ° C. the ingredients are sodium nitrate and potassium nitrate.
  • Such a mixture is from 95-100 ° C at ambient pressure a completely dissolved, ie free of sediment and extremely F conductedfä ⁇ hige, ie (fully) liquid phase.
  • This volatile crystal water can be stored temporarily by a process Kondensationspro- and is available for cooling of the solar array circuit (eg night mode) to restore ⁇ position of the low melting point by reversible formation of the salt hydrate calcium nitrate tetrahydrate for Availability checked ⁇ supply. Since formation of the tetrahydrate by the addition of water, the enthalpy of hydration of -51.5 kJ / mol or
  • the mixture of two or more components which form a eutectic in anhydrous mixture is preferably a mixture of sodium nitrate and potassium nitrate, with the third component being calcium nitrate tetrahydrate, calcium nitrate trihydrate, calcium nitrate dihydrate and / or calcium nitrate monohydrate is.
  • the cation ratio is, for example, in the range of Ca 2+ 25-35 mol%, Na +: 15-25 mol%, K +: 45-55 mol%.
  • the melting point can be adjusted within certain limits.
  • the mixture melts in the anhydrous state in the range of 110-140 ° C.
  • the mixture is in the temperature range from 50 ° C to 70 ° C teilliquide.
  • teilliquide refers to when the mixture flows but has a sediment.
  • the mixture in the temperature range of 95 ° C to 120 ° C, preferably from 95 ° C to 110 ° C is liquid.
  • the heat transfer medium is dehydrated at temperatures above 400 ° C without decomposition, more preferably at Tempe ⁇ temperatures above 450 ° C and most preferably at temperatures up to 500 ° C.
  • the heat transfer medium is additionally admixed with water, in particular so that the liquidification in the temperature range below 100 ° C. is facilitated.
  • water is added in an amount of 0.1 to 30 wt.
  • the example mentioned forms a liquid phase at about 50 ° C with low sediment of sodium and potassium nitrate, at 85 ° C.
  • the mixture contains only the smallest, unresolved baubles and is in the range 95-105 ° C single phase.
  • HEAT ⁇ zen of 100-135 ° C at ambient pressure no boiling of water of crystallization takes place, the liquid phase is up to 133 ° C without ⁇ supplementallich low-viscous and does not form a solid sediment from Nitatspezies.
  • vacuum 0.1 mbar
  • six hours of heating at 190 ° C and then allowed to cool overnight at room temperature under nitrogen ⁇ protective atmosphere, the softening point was placed firmly ⁇ about 95 ° C. This illustrates the greatly reduced tendency of crystalline water and / or steam pronounced ⁇ pressure decrease in the used mixture.
  • the invention relates to a heat transfer medium, in particular for use in solar thermal power plants, and a method for operating a solar thermal power plant.
  • a heat Trans ⁇ sudium is used according to the invention, the reversibly absorb water and can give off ⁇ , wherein upon heating releases the heat transfer medium is water and the heat transfer medium ⁇ releases heat upon resuming of the water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne un fluide caloporteur destiné notamment à être utilisé dans des centrales héliothermiques, ainsi qu'un procédé pour faire fonctionner une centrale héliothermique. Selon l'invention, le fluide caloporteur utilisé peut absorber de l'eau et inversement la libérer, le fluide caloporteur libérant l'eau lorsqu'il est chauffé et dégageant de la chaleur lorsqu'il absorbe l'eau.
EP11751901.7A 2010-09-27 2011-09-01 Fluide caloporteur, utilisation correspondante et procédé pour faire fonctionner une centrale héliothermique Withdrawn EP2603746A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010041460A DE102010041460A1 (de) 2010-09-27 2010-09-27 Wärmetransfermedium, Verwendung dazu und Verfahren zum Betreiben einer solarthermischen Kraftwerksanlage
PCT/EP2011/065136 WO2012041634A1 (fr) 2010-09-27 2011-09-01 Fluide caloporteur, utilisation correspondante et procédé pour faire fonctionner une centrale héliothermique

Publications (1)

Publication Number Publication Date
EP2603746A1 true EP2603746A1 (fr) 2013-06-19

Family

ID=44545736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11751901.7A Withdrawn EP2603746A1 (fr) 2010-09-27 2011-09-01 Fluide caloporteur, utilisation correspondante et procédé pour faire fonctionner une centrale héliothermique

Country Status (4)

Country Link
US (1) US9506671B2 (fr)
EP (1) EP2603746A1 (fr)
DE (1) DE102010041460A1 (fr)
WO (1) WO2012041634A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010041460A1 (de) 2010-09-27 2012-01-19 Siemens Aktiengesellschaft Wärmetransfermedium, Verwendung dazu und Verfahren zum Betreiben einer solarthermischen Kraftwerksanlage
DE102011007650A1 (de) 2011-04-19 2012-10-25 Siemens Aktiengesellschaft Solarthermische Kraftwerkanlage und Verfahren zum Betreiben einer solarthermischen Kraftwerksanlage
FR2995062B1 (fr) * 2012-09-04 2014-10-03 Commissariat Energie Atomique Procedes de stockage et de liberation d'energie thermique, reacteur associe et application au stockage intersaisonnier de chaleur solaire
NO337770B1 (no) * 2012-09-18 2016-06-20 Yara Int Asa Anvendelse av et kalsiumkaliumnitratsalt i fremstillingen av et varmeoverføringsmedium
DE102012019381A1 (de) 2012-10-02 2014-04-03 Linde Aktiengesellschaft Verfahren zur Speicherung von Energie in Salzschmelzen
DE102012020480A1 (de) 2012-10-18 2014-04-24 Linde Aktiengesellschaft Verfahren zum Betreiben eines solarthermischen Kraftwerks sowie solarthermisches Kraftwerk
US10011754B2 (en) * 2013-01-23 2018-07-03 Basf Se Method of improving nitrate salt compositions by means of nitric acid for use as heat transfer medium or heat storage medium
DE202013005845U1 (de) * 2013-07-01 2014-08-04 Deutsches Zentrum für Luft- und Raumfahrt e.V. Latentwärmespeichermaterial
DE102013219498A1 (de) * 2013-09-27 2015-04-02 Siemens Aktiengesellschaft Salzgemisch als Speichermedium für ein ölbasiertes solarthermisches Kraftwerk

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US20090020264A1 (en) * 2006-03-01 2009-01-22 Yoshio Morita Method of heat accumulation and heat accumulation system

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GB201000156D0 (en) * 2010-01-07 2010-02-24 Gas2 Ltd Isothermal reactor for partial oxidisation of methane
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DE102010041460A1 (de) 2010-09-27 2012-01-19 Siemens Aktiengesellschaft Wärmetransfermedium, Verwendung dazu und Verfahren zum Betreiben einer solarthermischen Kraftwerksanlage
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See also references of WO2012041634A1 *

Also Published As

Publication number Publication date
DE102010041460A1 (de) 2012-01-19
US20130180519A1 (en) 2013-07-18
US9506671B2 (en) 2016-11-29
WO2012041634A1 (fr) 2012-04-05

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