DE102011083149A1 - Radiation detector for parabolic-channel power plant, has receiver pipe comprising heat storage element for buffering temperature fluctuations of heat transfer fluid, where storage element is designed as cable that comprises core - Google Patents
Radiation detector for parabolic-channel power plant, has receiver pipe comprising heat storage element for buffering temperature fluctuations of heat transfer fluid, where storage element is designed as cable that comprises core Download PDFInfo
- Publication number
- DE102011083149A1 DE102011083149A1 DE102011083149A DE102011083149A DE102011083149A1 DE 102011083149 A1 DE102011083149 A1 DE 102011083149A1 DE 102011083149 A DE102011083149 A DE 102011083149A DE 102011083149 A DE102011083149 A DE 102011083149A DE 102011083149 A1 DE102011083149 A1 DE 102011083149A1
- Authority
- DE
- Germany
- Prior art keywords
- storage element
- transfer fluid
- heat
- heat transfer
- power plant
- 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.)
- Ceased
Links
Images
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
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
-
- 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
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Die Erfindung betrifft einen Strahlungsempfänger für ein solarthermisches Kraftwerk nach dem Oberbegriff von Patentanspruch 1. The invention relates to a radiation receiver for a solar thermal power plant according to the preamble of patent claim 1.
Solarthermische Kraftwerke konzentrieren einfallendes Sonnenlicht auf Strahlungsempfänger, in welchem die gesammelte Wärmeenergie mittels eines Transportmediums abgeleitet und letztendlich einer Dampfturbine zugeführt wird. Ein üblicher Typ von solarthermischen Kraftwerken ist das Parabolrinnenkraftwerk, bei welchem das Sonnenlicht über rinnenförmige Spiegel mit parabolischen Querschnittsprofil gebündelt wird. Als Empfänger dient ein Rohr, welches entlang der Brennlinie dieser Parabolrinnenspiegel verläuft. Solar thermal power plants concentrate incident sunlight on radiation receivers, in which the collected heat energy is dissipated by means of a transport medium and ultimately fed to a steam turbine. A common type of solar thermal power plant is the parabolic trough power plant, in which the sunlight is bundled by trough-shaped mirrors with parabolic cross-sectional profile. The receiver is a tube which runs along the focal line of these parabolic trough mirrors.
Als Wärmetransportmedium in diesem Empfängerrohr kann entweder Wasser bzw. überhitzter Dampf selbst dienen, oder aber ein Öl Anwendung finden. Bei der Verwendung von Öl muss die aufgenommene Wärmeenergie noch über einen Wärmetauscher auf Wasser bzw. Dampf übertragen werden, um letztendlich die Turbine anzutreiben. As a heat transport medium in this receiver tube can either serve water or superheated steam itself, or find an oil application. When using oil, the absorbed heat energy must still be transferred via a heat exchanger to water or steam to ultimately drive the turbine.
Da die Sonneneinstrahlung stochastischen Variationen unterliegt, benötigen solche solarthermische Kraftwerke eine thermische Pufferkapazität. Hierfür sind in der Regel große Speichertanks vorgesehen, die ein Wärmespeichermedium mit hoher spezifischer Wärmekapazität enthalten. Die aufgenommene Wärmeenergie kann aus dem Transportmedium auf das Speichermedium übertragen werden, so dass beispielsweise auch ein Nachtbetrieb des solarthermischen Kraftwerk möglich wird. Since solar radiation is subject to stochastic variations, such solar thermal power plants require a thermal buffering capacity. For this purpose, large storage tanks are usually provided, which contain a heat storage medium with high specific heat capacity. The absorbed heat energy can be transferred from the transport medium to the storage medium, so that, for example, a night operation of the solar thermal power plant is possible.
Auf Grund der hohen thermischen Masse des gesamten zirkulierenden Wärmetransferfluids und der beträchtlichen Leitungslängen in einem solarthermischen Kraftwerk sind derartige große Speichertanks jedoch nicht geeignet, kurzfristige Fluktuationen, wie sie beispielsweise durch vorbeiziehende Wolken oder dergleichen entstehen können, zu puffern. However, due to the high thermal mass of the entire circulating heat transfer fluid and the substantial line lengths in a solar thermal power plant, such large storage tanks are not capable of buffering short-term fluctuations, such as may arise from passing clouds or the like.
Der vorliegenden Erfindung liegt somit die Aufgabe zu Grunde, einen Strahlungsempfänger nach dem Oberbegriff von Patentanspruch 1 bereitzustellen, welcher zur kurzfristigen Pufferungen von Einstrahlungsschwankungen in solarthermischen Kraftwerken Verwendung finden kann. The present invention is therefore based on the object to provide a radiation receiver according to the preamble of claim 1, which can be used for short-term buffering of radiation variations in solar thermal power plants use.
Diese Aufgabe wird durch einen Strahlungsempfänger mit den Merkmalen des Patentanspruchs 1 gelöst. This object is achieved by a radiation receiver having the features of patent claim 1.
Ein derartiger Strahlungsempfänger für ein solarthermisches Kraftwerk, insbesondere ein Parabolrinnenkraftwerk, weist ein von einem Wärmetransferfluid durchströmbares Empfängerrohr auf. Erfindungsgemäß ist dabei vorgesehen, dass das Empfängerrohr ein Wärmespeicherelement zum Puffern von Temperaturschwankungen des Wärmetransfersfluids umfasst. Mit anderen Worten wird direkt im Strahlungsempfänger eine lokale Wärmepufferung erreicht, die auf Grund der notwendigerweise kleinen Dimensionierung des Wärmespeicherelements zwar nicht ausreicht, um langfristige Temperaturschwankungen, wie beispielsweise im Nachtbetrieb, zu kompensieren, jedoch bei kurzfristigen Schwankungen, beispielsweise auf Grund von kurzer Beschattung durch vorüberziehende Wolken, eine konstante Temperatur des Wärmetransferfluids aufrecht erhalten kann. Ein solarthermisches Kraftwerk mit derartigen Strahlungsempfängern besitzt daher einen vorteilhaft besonders konstanten Leistungsabgabeverlauf. Such a radiation receiver for a solar thermal power plant, in particular a parabolic trough power plant, has a receiver pipe through which a heat transfer fluid can flow. According to the invention it is provided that the receiver tube comprises a heat storage element for buffering temperature fluctuations of the heat transfer fluid. In other words, a local heat buffering is achieved directly in the radiation receiver, which is due to the necessarily small dimensions of the heat storage element is not sufficient to compensate for long-term temperature fluctuations, such as in night mode, but with short-term fluctuations, for example, due to short shading by passing Clouds, a constant temperature of the heat transfer fluid can be maintained. A solar thermal power plant with such radiation receivers therefore has an advantageous particularly constant power output curve.
Vorzugsweise ist das Wärmespeicherelement als achsparallel mit dem Rohr verlaufendes Kabel ausgebildet. Ein solches Wärmespeicherelement kann sich über die gesamte Länge des Rohres erstrecken, so dass auch lokale Temperaturschwankungen im Rohr, die zu einer höheren mechanischen Spannungsbelastung oder dergleichen führen könnten, vermieden werden. Preferably, the heat storage element is designed as axially parallel to the pipe running cable. Such a heat storage element may extend over the entire length of the tube, so that local temperature fluctuations in the tube, which could lead to a higher mechanical stress or the like, are avoided.
Zweckmäßigerweise weist das Kabel eine Seele aus einer Zink-Aluminium-Legierung auf. Derartige Werkstoffe zeichnen sich durch eine hohe spezifische Wärmekapazität und eine hohe latente Schmelzwärme aus. Da der Schmelzpunkt von Zink-Aluminium-Legierungen im üblichen Betriebstemperaturbereich von solarthermischen Kraftwagen, also in etwa bei 400°C, liegt, können in derartigen Wärmespeicherelementen beträchtliche Energiemengen gespeichert werden, ohne dass es zu großen Temperaturschwankungen kommt. Conveniently, the cable has a core of a zinc-aluminum alloy. Such materials are characterized by a high specific heat capacity and a high latent heat of fusion. Since the melting point of zinc-aluminum alloys in the usual operating temperature range of solar thermal vehicles, ie at about 400 ° C, can be stored in such heat storage elements considerable amounts of energy without causing large temperature fluctuations.
Da derartige Zink-Aluminium-Legierungen insbesondere gegenüber Stahl sehr korrosiv sind, ist es ferner zweckmäßig, die Seele mit einer Korrosionsschutzschicht zu umhüllen, um vorzeitigen Materialverschleiß zu vermeiden. Besonders vorteilhaft ist dabei die Verwendung von keramischen Korrosionsschutzschichten, insbesondere aus Magnesiumoxid. Auch andere, insbesondere oxidische Keramiken, die in der Regel ebenfalls sehr stabil gegenüber von Zink-Aluminium-Legierungen sind, können Anwendung finden, sofern sie die notwendige thermische Leitfähigkeit aufweisen. Since such zinc-aluminum alloys are very corrosive, in particular to steel, it is also expedient to coat the core with a corrosion protection layer in order to avoid premature wear of the material. Particularly advantageous is the use of ceramic corrosion protection layers, in particular of magnesium oxide. Other, in particular oxidic ceramics, which are also usually very stable compared to zinc-aluminum alloys, can be used, provided that they have the necessary thermal conductivity.
Es ist ferner zweckmäßig, die Korrosionsschutzschicht innerhalb eines Stahlmantels anzuordnen. Dieser verleiht dem Wärmespeicherelement eine besonders gute mechanische Stabilität und kompensiert insbesondere die Sprödigkeit der keramischen Korrosionsschutzschicht. Gleichzeitig kann durch die Verwendung von Stahl ein guter Wärmetransfer von der mit dem Wärmetransferfluid in Kontakt stehenden Außenseiten des Kabels zur Seele aus Zink-Aluminium erreicht werden. It is also expedient to arrange the corrosion protection layer within a steel jacket. This gives the heat storage element a particularly good mechanical stability and compensates in particular the brittleness of the ceramic corrosion protection layer. At the same time, the use of steel can provide good heat transfer from the outside of the cable in contact with the heat transfer fluid to the zinc-aluminum core.
Im Folgenden wird die Erfindung und ihre Ausführungsformen anhand der Zeichnung näher erläutert. Die einzige Figur zeigt hierbei eine schematische Schnittdarstellung durch ein Ausführungsbeispiel eines erfindungsgemäßen Strahlungsempfängers. In the following the invention and its embodiments will be explained in more detail with reference to the drawing. The single figure shows a schematic sectional view through an embodiment of a radiation receiver according to the invention.
Ein solarthermisches Parabolrinnenkraftwerk umfasst eine Vielzahl von rinnen- bzw. trogförmigen Spiegeln mit einem paraboloiden Querschnittsprofil. Entlang der Brennlinie dieser Spiegeln sind Strahlungsempfänger in Form von Rohren angeordnet, wie in der Figur schematisch und ausschnittsweise darstellt. In einem Innenraum
Da die Sonneneinstrahlung auf die Spiegel und damit das Empfängerrohr
Die Wärmespeicherelemente
Im Betrieb des Kraftwerks wird ein Teil der eingestrahlten Energie somit dazu verwendet, dass die Seele
Nachteiligerweise haben Zink-Aluminium-Legierungen beträchtlich korrosive Eigenschaften, insbesondere im Kontakt mit Stahl. Um eine vorzeitige Korrosion des Wärmespeichers
Die Fertigung derartiger mehrschichtiger Kabel ist beispielsweise durch Zusammenfügen von Keramikhalbschalen um die Seele
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011083149A DE102011083149A1 (en) | 2011-09-21 | 2011-09-21 | Radiation detector for parabolic-channel power plant, has receiver pipe comprising heat storage element for buffering temperature fluctuations of heat transfer fluid, where storage element is designed as cable that comprises core |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011083149A DE102011083149A1 (en) | 2011-09-21 | 2011-09-21 | Radiation detector for parabolic-channel power plant, has receiver pipe comprising heat storage element for buffering temperature fluctuations of heat transfer fluid, where storage element is designed as cable that comprises core |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011083149A1 true DE102011083149A1 (en) | 2013-03-21 |
Family
ID=47751124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011083149A Ceased DE102011083149A1 (en) | 2011-09-21 | 2011-09-21 | Radiation detector for parabolic-channel power plant, has receiver pipe comprising heat storage element for buffering temperature fluctuations of heat transfer fluid, where storage element is designed as cable that comprises core |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102011083149A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106863850A (en) * | 2017-03-24 | 2017-06-20 | 中国电子科技集团公司第三十八研究所 | A kind of transfer method of drip irrigation dissolution type metal transfer core and the coat of metal |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4349013A (en) * | 1979-06-25 | 1982-09-14 | Alpha Solarco Inc. | Solar energy receivers |
DE19608138C1 (en) * | 1996-03-02 | 1997-06-19 | Deutsche Forsch Luft Raumfahrt | Channel-type solar radiation collector |
DE102009021287A1 (en) * | 2009-05-14 | 2010-11-18 | Leoni Bordnetz-Systeme Gmbh | Electric cable for e.g. on-board power supply in automotive industry, has cable insulation comprising latent heat accumulator absorbing heat in range of load temperature reliable for cable by phase transition |
-
2011
- 2011-09-21 DE DE102011083149A patent/DE102011083149A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4349013A (en) * | 1979-06-25 | 1982-09-14 | Alpha Solarco Inc. | Solar energy receivers |
DE19608138C1 (en) * | 1996-03-02 | 1997-06-19 | Deutsche Forsch Luft Raumfahrt | Channel-type solar radiation collector |
DE102009021287A1 (en) * | 2009-05-14 | 2010-11-18 | Leoni Bordnetz-Systeme Gmbh | Electric cable for e.g. on-board power supply in automotive industry, has cable insulation comprising latent heat accumulator absorbing heat in range of load temperature reliable for cable by phase transition |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106863850A (en) * | 2017-03-24 | 2017-06-20 | 中国电子科技集团公司第三十八研究所 | A kind of transfer method of drip irrigation dissolution type metal transfer core and the coat of metal |
CN106863850B (en) * | 2017-03-24 | 2018-12-21 | 中国电子科技集团公司第三十八研究所 | A kind of transfer method of trickle irrigation dissolution type metal transfer core model and the coat of metal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2507563B1 (en) | Absorber tube | |
DE3226334C2 (en) | Plant for generating energy by means of a turbine system using steam | |
DE10231467A1 (en) | Absorber tube for parabolic trough collectors in solar thermal power stations has a central metal tube with a glass jacket and an expansion compensating device | |
EP2430373B1 (en) | Solar trough collector | |
DE3130130A1 (en) | SOLAR ENERGY COLLECTOR WITH AN ABSORBER ELEMENT FROM A COATED FILM | |
DE202007008880U1 (en) | Heat pipe | |
DE10050715B4 (en) | Solar thermal rocket | |
EP2314971B1 (en) | Heat exchanger with energy feed-in for long-term stable and even power performance and method for same | |
DE2603506A1 (en) | AREA SOLAR ENERGY COLLECTORS WITH ABSORBER PLATES MADE OF SOLID GLASS FIBER | |
DE102011083149A1 (en) | Radiation detector for parabolic-channel power plant, has receiver pipe comprising heat storage element for buffering temperature fluctuations of heat transfer fluid, where storage element is designed as cable that comprises core | |
DE102011083147A1 (en) | Heat storage device i.e. tank, for parabolic trough power plant, has tubes connected in pair-wise by elbow joints running outside storage container, where elbow joints are formed as components separated by tubes, and made of steel | |
DE102011083145A1 (en) | Heat accumulator for solar-thermal power plant i.e. parabolic trough power plant, has heat transfer fluid flowing through pipe that is formed as double walled pipe, and chamber filled with fluid between outer shell and inner shell | |
DE3341156A1 (en) | ELECTRODE WITH INTEGRATED HEAT TRANSFER PIPE | |
DE102011083148A1 (en) | Heat storage device for solar thermal power plant, has heat storage element that is surrounded by heat transfer liquid in heat transfer fluid reservoir | |
DE3027711A1 (en) | DEVICE FOR USING SOLAR ENERGY | |
DE3106814A1 (en) | "BENDING PIPELINE, ESPECIALLY FOR THE TRANSPORT OF LIQUIDS WITH HIGH TEMPERATURES AND / OR HIGH PRESSURE AND TUBE WITH SUCH A PIPELINE | |
DE3102869A1 (en) | Device for storing heat for heating installations | |
DE102011017276A1 (en) | Absorber tube for panels and reflectors of solar thermal power plant, has tubular elements that are made of different materials or same materials of different weight percentages | |
EP2430375B1 (en) | Vacuum collector tube and method for producing said type of vacuum collector tube | |
DE102009046061B4 (en) | absorber tube | |
DE102011083499A1 (en) | Heat storage device for parabolic trough power plant, has storage tank including inner volume through which heat transfer medium flows, and pipe filled with medium, arranged in tank and including inner wall with anti-corrosion coating | |
DE102013201940A1 (en) | Receiver for use in e.g. solar plant, has cladding tube comprising supply and exhaust openings for generating flow of heat carrier fluid in cladding tube, where heat carrier fluid flows around solar cell | |
DE2156578B2 (en) | Flexible heat exchanger piping | |
DE102008051905A1 (en) | Process for the production of heat exchanger tubes | |
DE102009039168A1 (en) | Solar thermal system for heating industrial water, has optical fiber arranged between focal spot of bundling device i.e. parabolic reflector, and thermal engine, for conducting incident bundled beam to thermal engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |
Effective date: 20130323 |