DE102010028681A1 - Solar thermal forced circulation steam generator with internally ribbed pipes - Google Patents
Solar thermal forced circulation steam generator with internally ribbed pipes Download PDFInfo
- Publication number
- DE102010028681A1 DE102010028681A1 DE201010028681 DE102010028681A DE102010028681A1 DE 102010028681 A1 DE102010028681 A1 DE 102010028681A1 DE 201010028681 DE201010028681 DE 201010028681 DE 102010028681 A DE102010028681 A DE 102010028681A DE 102010028681 A1 DE102010028681 A1 DE 102010028681A1
- Authority
- DE
- Germany
- Prior art keywords
- solar thermal
- steam generator
- transfer medium
- heat transfer
- heat exchanger
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/065—Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
- F03G6/067—Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
- F22B1/167—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour using an organic fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B29/00—Steam boilers of forced-flow type
- F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
- F22B29/061—Construction of tube walls
- F22B29/062—Construction of tube walls involving vertically-disposed water tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/101—Tubes having fins or ribs
- F22B37/103—Internally ribbed tubes
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0061—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for phase-change applications
- F28D2021/0064—Vaporizers, e.g. evaporators
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Die Erfindung betrifft einen solarthermischen Dampferzeuger (5), umfassend einen Behälter (15) mit einem Einlass (13) und einem Auslass (14) zum Durchführen eines Wärmeträgermediums, weiter umfassend im Behälter (15) angeordnete Wärmetauscherrohre (18), durch die ein Arbeitsmedium führbar ist und die so ausgebildet sind, dass Wärme vom Wärmeträgermedium auf das Arbeitsmedium übertragbar ist, wobei die Wärmetauscherrohre (18) zumindest teilweise auf ihrer Innenseite Rippen (21) aufweisen.The invention relates to a solar thermal steam generator (5), comprising a container (15) with an inlet (13) and an outlet (14) for passing through a heat transfer medium, further comprising heat exchanger pipes (18) arranged in the container (15) through which a working medium and which are designed so that heat can be transferred from the heat transfer medium to the working medium, the heat exchanger tubes (18) having ribs (21) at least partially on their inside.
Description
Die Erfindung betrifft einen solarthermischen Dampferzeuger sowie eine solarthermische Kraftwerksanlage.The invention relates to a solar thermal steam generator and a solar thermal power plant.
Solarthermische Kraftwerke stellen eine Alternative zur herkömmlichen Stromerzeugung dar. Zurzeit werden solarthermische Kraftwerke mit Parabolrinnenkollektoren und indirekter Verdampfung ausgeführt.Solar thermal power plants represent an alternative to conventional electricity generation. At present, solar thermal power plants with parabolic trough collectors and indirect evaporation are carried out.
In einer Ausführungsform dieses solarthermischen Kraftwerks wird das Wärmeträgermedium in den Parabolrinnenkollektoren aufgeheizt. Das heiße Wärmeträgermedium gibt seine Energie in einem nachgeschalteten Wärmetauscher (Dampferzeuger) an das vom Kondensator kommende Speisewasser ab. Der erzeugte Dampf wird einer Dampfturbine zugeführt.In one embodiment of this solar thermal power plant, the heat transfer medium is heated in the parabolic trough collectors. The hot heat transfer medium releases its energy in a downstream heat exchanger (steam generator) to the feed water coming from the condenser. The generated steam is fed to a steam turbine.
Derartige Dampferzeuger können als Zwangdurchlaufdampferzeuger mit vertikalem oder horizontalem Kanal für das Wärmeträgermedium ausgeführt werden.Such steam generators can be designed as forced once-through steam generators with a vertical or horizontal channel for the heat transfer medium.
Grundsätzlich ist bei Dampferzeugern dieser Art die Möglichkeit der Entmischung der Zweiphasenströmung in den Verdampferrohren gegeben. Insbesondere bei niedrigen Teillasten kann dies zu Schichten-, Wellen- oder Pfropfenströmung führen.Basically, in steam generators of this type there is the possibility of segregation of the two-phase flow in the evaporator tubes. Especially at low part loads, this can lead to layer, wave or plug flow.
Aufgabe der Erfindung ist es, den genannten solarthermischen Dampferzeuger bzw. die entsprechende solarthermische Kraftwerksanlage weiterzuentwickeln, so dass die Entmischung der Zweiphasenströmung in den Verdampferrohren vermieden wird.The object of the invention is to further develop said solar thermal steam generator or the corresponding solar thermal power plant, so that the segregation of the two-phase flow is avoided in the evaporator tubes.
Erfindungsgemäß wird die auf den solarthermischen Dampferzeuger gerichtete Aufgabe gelöst durch einen solarthermischen Dampferzeuger, umfassend einen Behälter mit einem Einlass und einem Auslass zum Durchführen eines Wärmeträgermediums, weiter umfassend im Behälter angeordnete Wärmetauscherrohre, durch die ein Arbeitsmedium führbar ist und die so ausgebildet sind, dass Wärme vom Wärmeträgermedium auf das Arbeitsmedium übertragbar ist, wobei die Wärmetauscherrohre zumindest teilweise auf ihrer Innenseite Rippen aufweisen.According to the invention, the object directed to the solar thermal steam generator is achieved by a solar thermal steam generator, comprising a container having an inlet and an outlet for passing a heat transfer medium, further comprising heat exchanger tubes arranged in the container, through which a working medium can be guided and which are designed such that heat from the heat transfer medium to the working medium is transferable, wherein the heat exchanger tubes have at least partially on their inside ribs.
Durch den Einsatz von innenberippten Rohren erhöht sich die Betriebssicherheit des Dampferzeugers.The use of internally ribbed pipes increases the operational safety of the steam generator.
Vorteilhafter Weise bilden die Rippen ein Gewinde. Diese Ausführungsform der Innenberippung der Rohre prägt einer Zweiphasenströmung einen Drall auf. Aufgrund der daraus resultierenden Fliehkräfte wird die Phase mit der höheren Dichte (Wasser) an die Rohrwand gedrückt, während sich der Dampf vorzugsweise im Strömungskern befindet.Advantageously, the ribs form a thread. This embodiment of the internal ribbing of the tubes imposes a twist on a two-phase flow. Due to the resulting centrifugal forces, the higher density phase (water) is forced against the tube wall, while the vapor is preferentially located in the flow core.
Auf diese Weise kann die oben beschriebene Entmischung bis hin zu sehr niedrigen Teillasten (Massenstromdichten) sicher vermieden werden.In this way, the demixing described above can be safely avoided up to very low partial loads (mass flow densities).
Zweckmäßiger Weise sind die Wärmetauscherrohre zwischen einem Eintrittsammler und einem Austrittssammler angeordnet.Conveniently, the heat exchanger tubes are arranged between an inlet header and an outlet header.
Vorzugsweise sind die Rippen insbesondere in einem Bereich einer einsetzenden Verdampfung angeordnet, da sich das Problem der Entmischung vor allem hier stellt.Preferably, the ribs are arranged in particular in a region of incipient evaporation, since the problem of segregation is above all here.
Vorteilhafter Weise sind die Wärmetauscherrohre in einem Strömungskanal für das Wärmeträgermedium angeordnet. Anderenfalls würde das Wärmeträgermedium aufgrund des geringeren Strömungswiderstandes hauptsächlich entlang der Innenwand des Behälters und nicht durch die Wärmetauscherrohrzwischenräume strömen.Advantageously, the heat exchanger tubes are arranged in a flow channel for the heat transfer medium. Otherwise, due to the lower flow resistance, the heat transfer medium would flow mainly along the inner wall of the container and not through the heat exchanger tube spaces.
In einer vorteilhaften Ausführungsform ist das Wärmeträgermedium ein Thermoöl. Der große Vorteil von Thermoöl gegenüber beispielsweise Wasser ist der wesentlich höhere Siedepunkt. So kann eine Temperatur von über 300°C erreicht werden, ohne dass Probleme mit Dampfzuständen und erhöhten Drucken eine Rolle spielen.In an advantageous embodiment, the heat transfer medium is a thermal oil. The great advantage of thermal oil over, for example, water is the much higher boiling point. Thus, a temperature of over 300 ° C can be achieved without problems with steam conditions and increased pressures play a role.
In einer weiteren vorteilhaften Ausführungsform ist das Wärmeträgermedium eine Salzschmelze. Mit flüssigen Salzen lässt sich bei Temperaturen deutlich über 100°C Wärme transportieren, ohne dass dabei das Röhrensystem unter Druck steht, wie dies bei Wasserdampf der Fall wäre.In a further advantageous embodiment, the heat transfer medium is a molten salt. With liquid salts heat can be transported at temperatures significantly above 100 ° C, without the tube system being under pressure, as would be the case with steam.
Vorteilhafter Weise wird der solarthermische Dampferzeuger als Zwangsdurchlaufdampferzeuger verwendet bzw. ausgeführt. Im Gegensatz zu einem Natur- oder Zwangumlaufdampferzeuger unterliegen Durchlaufdampferzeuger keiner Druckbegrenzung, so dass Frischdampfdrucke weit über dem kritischen Druck von Wasser möglich sind. Dieser hohe Frischdampfdruck begünstigt einen hohen thermodynamischen Wirkungsgrad eines Kraftwerks.Advantageously, the solar thermal steam generator is used or executed as a once-through steam generator. In contrast to a natural or forced circulation steam generator, continuous steam generators are not subject to any pressure limitation, so that live steam pressures well above the critical pressure of water are possible. This high live steam pressure promotes a high thermodynamic efficiency of a power plant.
Vorteilhafter Weise umfasst eine solarthermische Kraftwerksanlage einen erfinderischen solarthermischen Dampferzeuger.Advantageously, a solar thermal power plant comprises an inventive solar thermal steam generator.
Weiterhin vorteilhaft ist es, wenn die solarthermische Kraftwerksanlage Parabolrinnen umfasst. Die Parabolrinnentechnik ist die zurzeit kostengünstigste Variante für Sonnenkollektorflächen.It is also advantageous if the solar thermal power plant comprises parabolic troughs. Parabolic trough technology is currently the most cost-effective variant for solar collector surfaces.
Die Erfindung wird beispielhaft anhand der Zeichnungen näher erläutert. Es zeigen schematisch und nicht maßstäblich:The invention will be explained in more detail by way of example with reference to the drawings. Shown schematically and not to scale:
Die
Der überhitzte Dampf wird im sogenannten konventionellen Teil des solarthermischen Kraftwerks
Speisewasser
Beim Durchlaufen der Wärmetauscherrohre
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010028681 DE102010028681A1 (en) | 2010-05-06 | 2010-05-06 | Solar thermal forced circulation steam generator with internally ribbed pipes |
PCT/EP2011/056703 WO2011138213A2 (en) | 2010-05-06 | 2011-04-28 | Solar thermal forced-flow steam generator with internally-ribbed tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010028681 DE102010028681A1 (en) | 2010-05-06 | 2010-05-06 | Solar thermal forced circulation steam generator with internally ribbed pipes |
Publications (1)
Publication Number | Publication Date |
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DE102010028681A1 true DE102010028681A1 (en) | 2011-11-10 |
Family
ID=44626325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE201010028681 Withdrawn DE102010028681A1 (en) | 2010-05-06 | 2010-05-06 | Solar thermal forced circulation steam generator with internally ribbed pipes |
Country Status (2)
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DE (1) | DE102010028681A1 (en) |
WO (1) | WO2011138213A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105841522A (en) * | 2016-04-05 | 2016-08-10 | 中国科学院上海高等研究院 | Molten salt heat exchanger for intelligently controlling heat exchange flowing speed |
WO2020069704A1 (en) * | 2018-10-01 | 2020-04-09 | Aalborg Csp A/S | Heat exchanger, such as for a solar power plant |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103884004A (en) * | 2012-12-19 | 2014-06-25 | 江苏飞亚化学工业有限责任公司 | Steam generator used for heat recovery |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4427859A1 (en) * | 1994-08-05 | 1995-10-26 | Siemens Ag | Tube with inner ribbing forming multi-hand thread |
US20100059216A1 (en) * | 2008-09-08 | 2010-03-11 | Balcke-Durr Gmbh | Heat Exchanger In A Modular Construction |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6302194B1 (en) * | 1991-03-13 | 2001-10-16 | Siemens Aktiengesellschaft | Pipe with ribs on its inner surface forming a multiple thread and steam generator for using the pipe |
US20110083619A1 (en) * | 2009-10-08 | 2011-04-14 | Master Bashir I | Dual enhanced tube for vapor generator |
-
2010
- 2010-05-06 DE DE201010028681 patent/DE102010028681A1/en not_active Withdrawn
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2011
- 2011-04-28 WO PCT/EP2011/056703 patent/WO2011138213A2/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4427859A1 (en) * | 1994-08-05 | 1995-10-26 | Siemens Ag | Tube with inner ribbing forming multi-hand thread |
US20100059216A1 (en) * | 2008-09-08 | 2010-03-11 | Balcke-Durr Gmbh | Heat Exchanger In A Modular Construction |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105841522A (en) * | 2016-04-05 | 2016-08-10 | 中国科学院上海高等研究院 | Molten salt heat exchanger for intelligently controlling heat exchange flowing speed |
WO2020069704A1 (en) * | 2018-10-01 | 2020-04-09 | Aalborg Csp A/S | Heat exchanger, such as for a solar power plant |
US20210381687A1 (en) * | 2018-10-01 | 2021-12-09 | Aalborg Csp A/S | Heat exchanger, such as for a solar power plant |
US11739931B2 (en) | 2018-10-01 | 2023-08-29 | Header-coil Company A/S | Heat exchanger, such as for a solar power plant |
Also Published As
Publication number | Publication date |
---|---|
WO2011138213A3 (en) | 2013-11-21 |
WO2011138213A2 (en) | 2011-11-10 |
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Legal Events
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20121201 |