EP3538831A1 - Verfahren zur speicherung von wärmeenergie, wärmespeicher und dampfkraftwerk - Google Patents
Verfahren zur speicherung von wärmeenergie, wärmespeicher und dampfkraftwerkInfo
- Publication number
- EP3538831A1 EP3538831A1 EP17800368.7A EP17800368A EP3538831A1 EP 3538831 A1 EP3538831 A1 EP 3538831A1 EP 17800368 A EP17800368 A EP 17800368A EP 3538831 A1 EP3538831 A1 EP 3538831A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- heat exchanger
- microcapsules
- bed
- exchanger element
- 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- Withdrawn
Links
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
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/023—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/12—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having two or more accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0069—Systems therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
-
- 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
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
-
- 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
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/025—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being in direct contact with a heat-exchange medium or with another heat storage material
-
- 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
- F28D13/00—Heat-exchange apparatus using a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/08—Fluid driving means, e.g. pumps, fans
-
- 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
Definitions
- the invention relates to a method for storing
- the invention relates to a heat storage having
- a second storage container for the bed wherein the second storage container is connected via the fluidized bed module with the first storage container;
- Fluidized bed module is guided.
- the invention relates to a steam power plant with a steam generator and with a heat storage.
- the fluidized bed is a bed of solid particles
- Fluidizing gas is placed in a fluidized state.
- a nozzle bottom is provided, through which the fluidizing gas from an underlying
- Windbox is introduced into the reactor room to go through there
- Fluidized bed are immersed in the fluidized
- Heat storage medium by heat exchange with the working fluid within the heat exchanger elements to heat or cool.
- heat transfer In the prior art are as heat transfer and
- Heat storage medium used fine solid particles. Sand is used especially frequently.
- DE 10 2013 208 973 AI discloses a latent heat storage system with two containers, which are connected to each other via a pipe. Between the containers, a phase change material is conveyed via the pipeline (for example, directly with a screw conveyor or as a suspension in a transport fluid), wherein a heat transfer device thermal energy between the phase change material and a
- Polymers only melting temperatures in the range up to about 150 ° C.
- WO 2013/089678 A1 shows a different cooling device for a heat-generating component of a computer (for example a processor).
- the object of the present invention is to improve a method and a heat accumulator of the kind set forth in such a way that the storage of heat with higher efficiency can be accomplished.
- Claim 1 a heat accumulator with the features of claim 8 and a steam power plant with the features of claim 15 solved.
- Preferred embodiments of the invention are specified in the dependent claims 2 to 7 and 9 to 14, respectively.
- the bed has microcapsules with a
- Phase Change Materials short PCM
- Phase change material which absorbs high amounts of heat energy during melting, which are discharged again as solidification heat during discharge of the latent heat storage.
- An example of such a latent heat storage is shown in DE 10 2010 060 717.
- a heat transfer medium is supplied through a pipe, which is received within a heat spreader in the form of an extruded profile.
- the extruded profile has a base body, on which ribs are fixed, which are in rib branches and rib branches
- the heat spreader is arranged in a heat storage, inside which a phase change material is provided.
- Spherical containers are arranged in a storage container in which a heat transfer fluid for flowing around the spherical container is introduced.
- Support material is included.
- the hollow spheres can be used in a fluidized bed heat exchanger. With the well-known
- the hollow spheres must be substantially larger than the microparticles according to the invention
- microencapsulated phase change materials cf. for example DE 10 2006 055 707 A1
- phase change material cf. for example DE 10 2006 055 707 A1
- slurry flow with phase change material in a liquid
- cooling machine components EP 2 949 422 A1.
- microcapsules ie particles with a
- the fluidized bed module is between a first storage container and a second
- Heat exchanger is not necessary.
- the one heat exchanger for storing and the other heat exchanger for the storage of the heat energy is set up.
- the microcapsules contain a phase change material, which during transport through the fluidized bed module in heat exchange with the first fluid flow of the heat exchange medium the
- Microcapsules is stored or latent heat of the
- Microcapsules is dispensed. Preferably that works
- Fluidized bed module in the first storage tank a solidification of the phase change material of the microcapsules instead, whereby the previously stored heat is released in the form of solidification heat to the first fluid flow of the heat exchange medium.
- This design brings significant benefits.
- the heat transfer is particularly efficient.
- the phase change material of the microcapsules instead, whereby the previously stored heat is released in the form of solidification heat to the first fluid flow of the heat exchange medium.
- the transport between the first and second storage container via the fluidized bed is therefore particularly advantageous because a decoupling of heat output and
- the fluidized bed also allows a very good heat transfer between the microcapsules and the heat exchange medium.
- the microcapsules can be
- a second fluid flow of a heat exchange medium in particular also a third
- Fluidized bed module out to independently allow each heat exchange with the fluidized microcapsules.
- the same fluidized bed of microcapsules can be used in the
- Microcapsules heated by heat absorption of the first fluid flow in the solid state, wherein in the
- Microcapsules by heat absorption from the second fluid flow from the solid state to the liquid state
- Cooled fluid flow Furthermore, the heat of the second fluid flow during charging of the heat accumulator can be converted into heat of fusion of the phase change material of the microcapsules. Accordingly, the transition from the liquid to the solid state of aggregation of
- Phase change material when unloading the heat accumulator can be used to provide the heat for the evaporator of the steam generator.
- the material of the shell of the microcapsules remains solid
- Microcapsules heated by heat absorption of the third fluid flow in the liquid state.
- phase change material is cooled during discharge of the heat accumulator in the liquid state of aggregation with heat release the third fluid flow.
- the first fluid flow between a steam generator, in particular a steam power plant, and the first
- Fluidized bed of microcapsules are discharged, which is formed in the fluidized bed module between the first storage tank and the second storage container.
- the energy stored in the microcapsules can be returned to the water-steam cycle of the steam power plant.
- Heat exchanger element is conveyed, wherein in one
- Microcapsules is heated by heat absorption from the first fluid flow in the solid state. At this
- the heat of the first fluid flow from the preheater of the steam generator can be used to the sensible heat, ie the heat associated with a temperature change, of the phase change material in the solid state.
- the sensible heat ie the heat associated with a temperature change
- the second fluid flow is conveyed between an evaporator of a steam generator and the second heat exchanger element, wherein in a
- Microcapsules by heat absorption from the second fluid flow from the solid state to the liquid state
- Phase change material of the microcapsules are converted.
- Discharging the heat accumulator can be used to provide the heat for the evaporator of the steam generator.
- Microcapsules is heated by heat absorption of the third fluid flow in the liquid state. At this
- Variant may be the heat of the superheater
- the phase change material is cooled during discharge of the heat accumulator in the liquid state of aggregation with release of heat to the third fluid flow.
- the sensitive area of the phase change material is in the liquid
- both the sensitive area of the energy storage device and the energy storage device are charged
- Phase change material used in the liquid state is provided, which with the preheater, evaporator or superheater of the
- Fluid bed module take place so that forms a temperature profile along the fluidized bed.
- the microcapsules each have a core of the phase change heat storage material and a shell enclosing the core on all sides.
- the shell is made of a different material than the phase change thermal storage material of the core.
- phase change material of the microcapsules for example, a nitrate salt may be provided.
- the shell preferably consists of a plastic, such as polyimide.
- Fluidized bed is smaller, but the heat transfer coefficient is greater than in the case of the hollow spheres used in the prior art, which in addition, assuming the same weight and the same material, have a larger volume and therefore require larger storage tank required. Accordingly, the microcapsules allow a particularly economical operation of the heat storage.
- Microcapsules each having a diameter of 50 to 500 microns, in particular from 50 to 100 microns.
- similar microcapsules are provided, each in the
- Heat exchanger element preferably also a third
- Heat exchanger element led into the fluidized bed module.
- the second heat exchanger element optionally also the third
- Heat exchanger element leads to a heat exchange medium to
- first, second, and optionally also the third, heat exchanger element are connected to a heat source or heat sink.
- Each heat exchanger element is preferably a tube bundle
- first heat exchanger element and the second heat exchanger element are
- the first heat exchanger element is connected to a steam generator.
- Steam generator is in particular part of a steam power plant.
- the heat generated in a steam boiler can be at least partially stored in the heat storage when the demand for electrical energy to the respective
- Time is lower than the heat provided by the boiler is. This can advantageously be a balance of
- the first heat exchanger element with a first customer in particular a preheater of a
- Fig. 1 shows schematically a heat storage for use in a steam power plant, wherein in the illustrated
- Fig. 2 shows the heat storage of Fig. 1 in one
- Fig. 3 shows schematically a microcapsule with a core
- Phase change material and a shell.
- Fig. 1, 2 show a heat storage 1, which in the embodiment shown from management part of a steam power plant 2 is.
- the steam power plant 2 may have a conventional structure, wherein in the following only the essential for the invention
- Steam power plant 2 connected. For the sake of simplicity, only one steam generator 3 of the water-steam cycle is shown.
- the steam generator 3 has a preheater 4 for preheating
- the steam generator 3 is connected to a steam turbine (not shown), which is connected to a generator (not shown).
- Fluidized bed module 7 for generating a fluidized bed of a bed 8, which consists of heat storage particles.
- the fluidized-bed module 7 is provided with a first storage container 9 for the bed 8 at one end region and with a second storage container 10 for the bed 8 at the other end region
- shut-off device 11 between the first storage tank 9 and the fluidized bed module 7 and a second shut-off device 12 between the second storage tank 9 and the fluidized bed module 7 is provided.
- the first shut-off device 11 and the second Shut-off device 12 can each be transferred between an open state and a closed state. In the open state of the first 11 and second shut-off device 12, the bed of the first 9 and second storage container 10 can flow under the action of gravity in the fluidized bed module 7. In the closed state of the first 11 and second
- Shut-off device 12 is the passage of the first 9 or
- first 11 and second shut-off device 12 are exemplified as a slider.
- Fluidized-bed module 7 has a device 13 for introducing a fluidizing gas (see arrows 14) into the bottom side (with reference to the operating state shown)
- Fluidized bed module 7 on. Due to the upward flow of the fluidizing gas, a fluidized bed with the
- Heat storage particles of the bed 8 generates.
- the heat storage particles of the bed 8 are placed in the fluidized bed module 7 in a fluidized state.
- the device 13 may have a nozzle base known in the prior art.
- Fluidized bed module 7 has at the top a ceiling 7a, in which at least one outlet opening 15 for the
- the outlet opening 15 can be provided with a valve, in particular a control valve, for adaptation of the exiting fluidizing gas flow (compare arrow 16).
- the bed 8 is formed of microcapsules 17, each consisting of a core
- microcapsules 17 are substantially free of voids.
- Phase materials or microcapsules 17 each have one
- a first heat exchanger element 20 a first heat exchanger element 20
- Heat exchanger element 22 is provided which each project in sections in the fluidized bed module 7.
- Heat exchanger element 22 carries a third fluid flow of a
- Heat exchange medium here water vapor.
- Heat exchanger element 20 is connected to the preheater 4, the second
- Heat exchanger element 21 is connected to the evaporator 5 and the third heat exchanger element 22 is connected to the superheater 6 of the
- the first heat exchanger element 20, the second heat exchanger element 21 and the third heat exchanger element 22 are arranged in the transport direction 23 of the microcapsules 17 (in relation to the injection operating state) at successive longitudinal positions of the fluidized bed module 7.
- Heat exchanger element 20 promoted. This is the
- Phase change material of the microcapsules 17 is heated by heat absorption of the first fluid flow in the solid state.
- Heat exchanger element 20 is cooled accordingly.
- the second fluid flow is from the evaporator 5 via the second
- Heat exchanger element 21 promoted. Due to the heat exchange between the microcapsules 17 and the second fluid flow, the phase change material of the microcapsules 17 from the solid
- Microcapsules is heated by heat absorption of the third fluid flow in the liquid state.
- Storage tank 10 enter the fluidized bed module 7. There, the microcapsules 17 flow in the fluidized state in the other horizontal direction 26 (opposite to the direction 23 in FIG Injection mode) along the fluidized bed module 7. In heat exchange with the first, second and third fluid flows, the microcapsules 17 release the previously stored heat.
- the second heat exchanger element 21 effects a phase transition of the phase change material from the liquid to the solid state.
- Phase change material cooled in the solid state The first, second and third fluid flows absorb the heat given off by the microcapsules.
- the microcapsules 17 pass through a second outlet opening 27a of the fluidized-bed module 7 into a second intermediate bunker 27b, which has a second intermediate bunker 27b
- Transport device 28 in the embodiment shown again a bucket elevator, with the first storage container 9 is connected.
- the same transport device for transporting the microcapsules 17 from the first intermediate bunker 24b into the second storage container 19 and for transporting the microcapsules 17 from the second intermediate bunker 27b into the first storage container 9 may also be provided.
- Other transport means for the horizontal transport of the microcapsules 17 along the fluidized-bed module 7 may also be provided.
- Fig. 3 shows the microcapsules 17, which in the
- a method for intermediate storage of heat, in particular in a steam power plant 2 can be carried out, which comprises at least the following steps: - Provide a bed 8 in a first storage container 9, wherein the bed 8 microcapsules 17 with a
- Phase change material 18
- Fluidized bed module 7
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Dispersion Chemistry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT510202016 | 2016-11-09 | ||
PCT/AT2017/060298 WO2018085872A1 (de) | 2016-11-09 | 2017-11-09 | Verfahren zur speicherung von wärmeenergie, wärmespeicher und dampfkraftwerk |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3538831A1 true EP3538831A1 (de) | 2019-09-18 |
Family
ID=60381975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17800368.7A Withdrawn EP3538831A1 (de) | 2016-11-09 | 2017-11-09 | Verfahren zur speicherung von wärmeenergie, wärmespeicher und dampfkraftwerk |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3538831A1 (de) |
WO (1) | WO2018085872A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3594458A1 (de) * | 2018-07-09 | 2020-01-15 | Siemens Aktiengesellschaft | Vorrichtung und verfahren zur speicherung oder bereitstellung eines dampfes |
AT521611B1 (de) | 2018-11-13 | 2020-03-15 | Univ Wien Tech | Wirbelschichtreaktor mit Pufferspeichern |
AT521704B1 (de) * | 2019-03-25 | 2020-04-15 | Berndorf Band Gmbh | Vorrichtung zum Speichern von Energie in Form von latenter Wärme |
SE543933C2 (en) * | 2019-11-28 | 2021-09-28 | Saltx Tech Ab | System and method for energy storage |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT510897B1 (de) * | 2010-09-03 | 2012-10-15 | Univ Wien Tech | Wärmespeichersystem |
WO2013012907A2 (en) * | 2011-07-18 | 2013-01-24 | University Of South Florida | Method of encapsulating a phase change material with a metal oxide |
US9765251B2 (en) * | 2012-12-18 | 2017-09-19 | University Of South Florida | Encapsulation of thermal energy storage media |
DE102013208973A1 (de) * | 2013-05-15 | 2014-11-20 | Siemens Aktiengesellschaft | Hochleistungslatentwärmespeicher |
JP6332812B2 (ja) * | 2013-08-23 | 2018-05-30 | 国立大学法人神戸大学 | 硬殻マイクロカプセル化潜熱輸送物質とその製造方法 |
-
2017
- 2017-11-09 WO PCT/AT2017/060298 patent/WO2018085872A1/de unknown
- 2017-11-09 EP EP17800368.7A patent/EP3538831A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018085872A1 (de) | 2018-05-17 |
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