WO2012110329A2 - Solar-thermal steam generator - Google Patents

Solar-thermal steam generator Download PDF

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Publication number
WO2012110329A2
WO2012110329A2 PCT/EP2012/051849 EP2012051849W WO2012110329A2 WO 2012110329 A2 WO2012110329 A2 WO 2012110329A2 EP 2012051849 W EP2012051849 W EP 2012051849W WO 2012110329 A2 WO2012110329 A2 WO 2012110329A2
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WO
WIPO (PCT)
Prior art keywords
steam generator
solar
power plant
thermal power
solar thermal
Prior art date
Application number
PCT/EP2012/051849
Other languages
German (de)
French (fr)
Other versions
WO2012110329A3 (en
Inventor
Jürgen Birnbaum
Joachim Brodesser
Jan BRÜCKNER
Martin Effert
Joachim Franke
Gerhard Schlund
Tobias Schulze
Frank Thomas
Gerhard Zimmermann
Original Assignee
Siemens Aktiengesellschaft
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Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012110329A2 publication Critical patent/WO2012110329A2/en
Publication of WO2012110329A3 publication Critical patent/WO2012110329A3/en

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Classifications

    • 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
    • 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
    • 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
    • F24S2023/87—Reflectors layout
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • 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
    • F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
    • 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

Definitions

  • the invention relates to a steam generator for a solar thermal power plant with direct evaporation in parabolic trough collectors or Fresnel collectors and relates in particular to the avoidance of dynamic instabilities in the evaporator.
  • the invention further relates to a solarthermi- see power plant.
  • Solar thermal power plants are an alternative to conventional electricity generation ago ⁇ .
  • One option is the direct evaporation ⁇ fung in parabolic trough collectors or Fresnel collectors.
  • a solar thermal power plant with parabolic trough collectors or Fresnel collectors and direct evaporation consists of a solar field in which the feedwater is preheated, evaporated and superheated, and from a conventional power plant part in which the thermal energy of Wasserdamp ⁇ fes is converted into electrical energy.
  • the solar thermal power plants are operated with parabolic trough collectors or Fresnel collectors in circulation operation.
  • the water supplied to the evaporator collectors is not completely evaporated, but separated in a separation from the steam.
  • the water is sent to the evaporator closing supplied via a circulating pump and the steam flows to the superheater.
  • the object of the invention is therefore to provide a steam generator for a solar thermal power plant with Parabolrinnen- ode fresnel and direct evaporation, which is suitable for stable continuous operation.
  • Another object of the invention is the specification of a solar thermal power plant with stable evaporation.
  • a pressure compensation device between the first and the second stage is arranged, on which the parallel Tubes are operatively connected to each other, the evaporator fer is divided into each other largely decoupled and thus learnge ⁇ independent systems.
  • the dynamically stable heating surfaces of the evaporator can then be run in continuous operation, resulting in particular for a solar thermal power plant great Vortei ⁇ le.
  • the evaporation end point within the evaporator is flexible.
  • the fluid can already be overheated in the evaporator and thus can be reacted flexibly to fluctuations in the heating of the evaporator and superheater.
  • the internal consumption of the system is reduced during operation of the evaporator in fürlaufbe ⁇ drive, because the circulation ⁇ pump goes out of operation.
  • a working medium which is to be relaxed later in a turbine, directly evaporable in the tubes, since in the direct evaporation by eliminating the solar primary cycle over the indirect evaporation reduce the investment costs and the power plant efficiency is improved.
  • the working medium is water.
  • the pressure compensation device is a pressure compensation line and its position is selected so that there is a vapor content of the medium to be heated between 40 and 100% during operation.
  • the flow in the pipes connected in parallel should not be influenced by the pressure equalization line as long as possible.
  • the pressure equalization line is doing so arranged on the one hand at the furthest downstream point of the parallel connected pipes comes to rest and on the other hand still their purpose - namely the avoidance of instabilities - met.
  • the cross section of the pressure equalization line is to be chosen significantly smaller than the cross section of the evaporator tubes.
  • At least one tube has a local cross- sectional constriction, in particular a throttle, in its inlet region, which typically has a single-phase supercooled flow medium during operation, which reduces the relative portion of the pressure loss at the outlet of the system and thus the probability of an occurrence of instability can be further reduced.
  • a solar thermal power plant it is advantageous if it comprises a steam generator according to the invention, wherein the tubes are advantageously components of parabolic trough or Fresnel collectors.
  • the figure shows schematically a steam generator 1 with pressure compensation device 2 for a solar thermal power plant with direct evaporation.
  • the steam generator 1 has a plurality of solar collector strands 3 connected in parallel for evaporating feed water, which is supplied via a feedwater line 4.
  • the solar collector strands 3 are formed from behind ⁇ cascaded parabolic trough or Fresnel collectors 5, through which pipes flows 6 to be heated working medium.
  • the solar collector strands 3 have a first 7 and a second stage 8, between which the pressure compensation device 2 is arranged, by means of which dynamic instabilities in the steam generator 1 are avoided.
  • the position of the pressure compensation device 2, which is formed here as a pressure equalization lines between the parallel tubes 6 of the individual solar collector strands 3, is selected so that the vapor content of the heated Me ⁇ medium, that is, the feedwater, between 40 and 100%, for example 60% lies.
  • the pipes 6 of the first stage 7 branching off from the feedwater line 4 also have local cross-sectional constrictions 9, for example throttles 10, at their inlet.
  • the throttles 10 ensure virtually over the entire load range of the solar thermal continuous steam generator ei ⁇ NEN increased pressure drop in its inlet region. In this case, a stable and uniform flow of preheated feedwater through the tubes 6 is promoted.

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

Abstract

The invention relates to a steam generator (1) for a solar-thermal power plant having a number of solar-heatable pipes (6) which are connected in parallel and carry a working medium that is to be heated, said pipes comprising a first (7) and a second stage (8). According to the invention, a pressure compensation device (2) is arranged between the first (7) and the second stage (8), the pipes (6) connected in parallel being operatively connected to each other at the level of said pressure compensation device.

Description

Beschreibung description
Solarthermischer Dampferzeuger Die Erfindung betrifft einen Dampferzeuger für eine solarthermische Kraftwerksanlage mit Direktverdampfung in Parabol- rinnenkollektoren oder Fresnel-Kollektoren und bezieht sich insbesondere auf die Vermeidung dynamischer Instabilitäten im Verdampfer. Die Erfindung betrifft ferner eine solarthermi- sehe Kraftwerksanlage. The invention relates to a steam generator for a solar thermal power plant with direct evaporation in parabolic trough collectors or Fresnel collectors and relates in particular to the avoidance of dynamic instabilities in the evaporator. The invention further relates to a solarthermi- see power plant.
Solarthermische Kraftwerke stellen eine Alternative zur her¬ kömmlichen Stromerzeugung dar. Zurzeit werden solarthermisch Kraftwerke mit Parabolrinnenkollektoren und indirekter Verdampfung ausgeführt. Eine Option stellt die direkte Verdamp¬ fung in Parabolrinnenkollektoren oder Fresnel-Kollektoren dar . Solar thermal power plants are an alternative to conventional electricity generation ago ¬. Currently, executed by solar thermal power plants with parabolic trough collectors and indirect evaporation. One option is the direct evaporation ¬ fung in parabolic trough collectors or Fresnel collectors.
Ein solarthermisches Kraftwerk mit Parabolrinnenkollektoren oder Fresnel-Kollektoren und direkter Verdampfung besteht aus einem Solarfeld, in dem das Speisewasser vorgewärmt, verdampft und überhitzt wird, und aus einem konventionellen Kraftwerksteil, in dem die thermische Energie des Wasserdamp¬ fes in elektrische Energie umgewandelt wird. A solar thermal power plant with parabolic trough collectors or Fresnel collectors and direct evaporation consists of a solar field in which the feedwater is preheated, evaporated and superheated, and from a conventional power plant part in which the thermal energy of Wasserdamp ¬ fes is converted into electrical energy.
Bei solarthermischen Kraftwerken mit direkter Verdampfung kommen bislang in den Empfängern ("Receiver") Glattrohre mit der gleichen Rohrgeometrie in allen Verdampferkollektoren zum Einsatz. Aufgrund der großen Rohrlänge und der insgesamt ho- hen Beheizung neigt die Strömung des Fluids in den Verdampferkollektoren zu dynamischen Instabilitäten. In solar thermal power plants with direct evaporation so far in the receivers ("Receiver") smooth tubes with the same tube geometry in all evaporator collectors are used. Due to the large tube length and the overall high heating, the flow of the fluid in the evaporator collectors tends to dynamic instabilities.
Bislang werden die solarthermischen Kraftwerke mit Parabolrinnenkollektoren oder Fresnel-Kollektoren im Umwälzbetrieb gefahren. Das den Verdampferkollektoren zugeführte Wasser wird nicht vollständig verdampft, sondern in einem Abscheide vom Dampf abgetrennt. Das Wasser wird dem Verdampfer an- schließend über eine Umwälzpumpe wieder zugeführt und der Dampf strömt zu den Überhitzerheizflächen. So far, the solar thermal power plants are operated with parabolic trough collectors or Fresnel collectors in circulation operation. The water supplied to the evaporator collectors is not completely evaporated, but separated in a separation from the steam. The water is sent to the evaporator closing supplied via a circulating pump and the steam flows to the superheater.
Ein Betrieb eines solchen Kraftwerks im reinen Durchlaufbe¬ trieb war bislang nicht erfolgreich, was sich sehr wahrscheinlich auf die zuvor beschriebenen Instabilitäten zurück führen lässt. An operation of such a power plant in pure Durchlaufbe ¬ drive was previously unsuccessful, which is very likely to lead back to the instabilities described above.
Aufgabe der Erfindung ist es daher, einen Dampferzeuger für eine solarthermische Kraftwerksanlage mit Parabolrinnen- ode Fresnelkollektoren und direkter Verdampfung anzugeben, der für einen stabilen Durchlaufbetrieb geeignet ist. Eine weite re Aufgabe der Erfindung ist die Angabe einer solarthermischen Kraftwerksanlage mit stabiler Verdampfung. The object of the invention is therefore to provide a steam generator for a solar thermal power plant with Parabolrinnen- ode fresnel and direct evaporation, which is suitable for stable continuous operation. Another object of the invention is the specification of a solar thermal power plant with stable evaporation.
Erfindungsgemäß wird diese Aufgabe gelöst durch einen Dampf¬ erzeuger gemäß Anspruch 1, sowie eine solarthermische Kraft¬ werksanlage gemäß Anspruch 7. Vorteilhafte Weiterbildungen der Erfindung sind den abhängigen Ansprüchen zu entnehmen. According to the invention this object is achieved by a steam generator ¬ according to claim 1, as well as a solar thermal power plant according to claim ¬ 7. Advantageous further developments of the invention are disclosed in the dependent claims.
Indem bei einem Dampferzeuger für eine solarthermische Kraft Werksanlage mit einer Anzahl von solar beheizbaren und ein aufzuheizendes Arbeitsmedium führenden parallel geschalteten Rohren, die eine erste und eine zweite Stufe umfassen, eine Druckausgleichseinrichtung zwischen der ersten und der zweiten Stufe angeordnet ist, an der die parallel geschalteten Rohre miteinander in Wirkverbindung stehen, wird der Verdamp fer in voneinander weitgehend entkoppelte und damit weitge¬ hend voneinander unabhängige Systeme geteilt. By having in a steam generator for a solar thermal power plant with a number of solar heated and a heated working medium leading parallel connected tubes comprising a first and a second stage, a pressure compensation device between the first and the second stage is arranged, on which the parallel Tubes are operatively connected to each other, the evaporator fer is divided into each other largely decoupled and thus weitge ¬ independent systems.
Bei entsprechender Wahl der Lage der Druckausgleichseinrichtung im Verdampfer können so dynamische Instabilitäten siehe vermieden werden. With appropriate choice of the position of the pressure compensation device in the evaporator so dynamic instabilities can be seen see.
Umfangreiche Untersuchungen haben gezeigt, dass der Anteil des Druckverlustes der Zweiphasenströmung bzw. der Dampfstre cke am Gesamtdruckverlust eine entscheidende Rolle bei der Entstehung dynamischer Instabilitäten spielt. Der Anteil dieses Druckverlustes am Gesamtdruckverlust des Systems wird nun durch die erfindungsgemäße Ausbildung minimiert. Die Ge¬ fahr, dass dynamische Instabilität auftreten, lässt sich so auf ein für die Dampferzeugung unkritisches Maß reduzieren. Extensive investigations have shown that the share of the pressure loss of the two-phase flow or the steam gap in the total pressure loss plays a decisive role in the development of dynamic instabilities. The amount This pressure loss on the total pressure loss of the system is now minimized by the inventive design. The Ge ¬ driving that dynamic instability occur can be reduced to an uncritical for steam generation measure.
Die dynamisch stabilen Heizflächen des Verdampfers können dann auch im Durchlaufbetrieb gefahren werden, wodurch sich insbesondere für ein solarthermisches Kraftwerk große Vortei¬ le ergeben. Im Durchlaufbetrieb ist der Verdampfungsendpunkt innerhalb des Verdampfers flexibel. Das Fluid kann bereits im Verdampfer überhitzt werden und damit kann auf Schwankungen in der Beheizung von Verdampfer und Überhitzer flexibel reagiert werden. Außerdem wird beim Betrieb des Verdampfers im Durchlaufbe¬ trieb der Eigenbedarf der Anlage reduziert, weil die Umwälz¬ pumpe außer Betrieb geht. The dynamically stable heating surfaces of the evaporator can then be run in continuous operation, resulting in particular for a solar thermal power plant great Vortei ¬ le. In continuous operation, the evaporation end point within the evaporator is flexible. The fluid can already be overheated in the evaporator and thus can be reacted flexibly to fluctuations in the heating of the evaporator and superheater. In addition, the internal consumption of the system is reduced during operation of the evaporator in Durchlaufbe ¬ drive, because the circulation ¬ pump goes out of operation.
Weiterhin können bei gleichmäßiger Verteilung des Wasser- und Dampfgemisehes auf die zweite Stufe des Verdampfers, Schief¬ lagen (in Dampfgehalt bzw. Temperatur) aus der ersten Stufe merklich reduziert werden. Furthermore, with a uniform distribution of the water and Dampfgemisehes on the second stage of the evaporator, skew ¬ positions (in steam content or temperature) can be significantly reduced from the first stage.
Vorteilhafter Weise ist ein Arbeitsmedium, welches später in einer Turbine entspannt werden soll, in den Rohren direkt verdampfbar, da sich bei der Direktverdampfung durch den Wegfall des solaren Primärkreislaufs gegenüber der indirekten Verdampfung die Investitionskosten reduzieren und der Kraftwerkswirkungsgrad verbessert wird. Zweckmäßiger Weise ist das Arbeitsmedium dabei Wasser. Advantageously, a working medium, which is to be relaxed later in a turbine, directly evaporable in the tubes, since in the direct evaporation by eliminating the solar primary cycle over the indirect evaporation reduce the investment costs and the power plant efficiency is improved. Appropriately, the working medium is water.
Vorteilhafter Weise ist die Druckausgleichseinrichtung eine Druckausgleichsleitung und deren Lage ist so gewählt, dass dort im Betrieb ein Dampfgehalt des aufzuheizenden Mediums zwischen 40 und 100 % vorliegt. Dabei soll die Strömung in den parallel geschalteten Rohren aber so lange wie möglich nicht durch die Druckausgleichsleitung beeinflusst werden. Zweckmäßiger Weise wird die Druckausgleichsleitung dabei so angeordnet, dass sie zum einen an der am weitesten stromab gelegenen Stelle der parallel geschalteten Rohre zum Liegen kommt und zum anderen aber noch ihren Zweck - nämlich die Vermeidung von Instabilitäten - erfüllt. Vorzugsweise ist der Querschnitt der Druckausgleichsleitung deutlich kleiner als der Querschnitt der Verdampferrohre zu wählen. Advantageously, the pressure compensation device is a pressure compensation line and its position is selected so that there is a vapor content of the medium to be heated between 40 and 100% during operation. However, the flow in the pipes connected in parallel should not be influenced by the pressure equalization line as long as possible. Appropriately, the pressure equalization line is doing so arranged on the one hand at the furthest downstream point of the parallel connected pipes comes to rest and on the other hand still their purpose - namely the avoidance of instabilities - met. Preferably, the cross section of the pressure equalization line is to be chosen significantly smaller than the cross section of the evaporator tubes.
Vorteilhafter Weise weist mindestens ein Rohr in seinem Eintrittsbereich, an dem im Betrieb typischerweise ein einphasig unterkühltes Strömungsmedium vorliegt, eine lokale Quer¬ schnittsverengung, insbesondere eine Drossel, auf, wodurch sich der relative Anteil des Druckverlusts am Austritt des Systems verringert und somit die Wahrscheinlichkeit für ein Auftreten einer Instabilität noch weiter gesenkt werden kann. Advantageously, at least one tube has a local cross- sectional constriction, in particular a throttle, in its inlet region, which typically has a single-phase supercooled flow medium during operation, which reduces the relative portion of the pressure loss at the outlet of the system and thus the probability of an occurrence of instability can be further reduced.
Für eine solarthermische Kraftwerksanlage ist es vorteilhaft, wenn sie einen Dampferzeuger nach der Erfindung umfasst, wobei in vorteilhafter Weise die Rohre Komponenten von Parabol- rinnen- oder Fresnel-Kollektoren sind. For a solar thermal power plant, it is advantageous if it comprises a steam generator according to the invention, wherein the tubes are advantageously components of parabolic trough or Fresnel collectors.
Die Erfindung wird beispielhaft anhand der Zeichnung näher erläutert . Die Figur zeigt schematisch einen Dampferzeuger 1 mit Druckausgleichseinrichtung 2 für ein solarthermisches Kraftwerk mit direkter Verdampfung. Der Dampferzeuger 1 weist mehrere parallel geschaltete Sonnenkollektorstränge 3 zur Verdampfung von Speisewasser auf, das über eine Speisewasserleitung 4 zu- geführt wird. Die Sonnenkollektorstränge 3 werden aus hinter¬ einander geschalteten Parabolrinnen- oder Fresnel-Kollektoren 5 gebildet, durch deren Rohre 6 aufzuheizendes Arbeitsmedium strömt. Erfindungsgemäß weisen die Sonnenkollektorstränge 3 eine erste 7 und eine zweite Stufe 8 auf, zwischen denen die Druckausgleichseinrichtung 2 angeordnet ist, durch die dynamische Instabilitäten im Dampferzeuger 1 vermieden werden. Die Lage der Druckausgleichseinrichtung 2, die hier als Drucksausgleichsleitungen zwischen den parallelen Rohren 6 der einzelnen Sonnenkollektorsträngen 3 ausgebildet ist, ist dabei so gewählt, dass der Dampfgehalt des aufzuheizenden Me¬ diums, das heißt, des Speisewassers, zwischen 40 und 100%, beispielsweise bei 60 % liegt. The invention will be explained in more detail by way of example with reference to the drawing. The figure shows schematically a steam generator 1 with pressure compensation device 2 for a solar thermal power plant with direct evaporation. The steam generator 1 has a plurality of solar collector strands 3 connected in parallel for evaporating feed water, which is supplied via a feedwater line 4. The solar collector strands 3 are formed from behind ¬ cascaded parabolic trough or Fresnel collectors 5, through which pipes flows 6 to be heated working medium. According to the invention, the solar collector strands 3 have a first 7 and a second stage 8, between which the pressure compensation device 2 is arranged, by means of which dynamic instabilities in the steam generator 1 are avoided. The position of the pressure compensation device 2, which is formed here as a pressure equalization lines between the parallel tubes 6 of the individual solar collector strands 3, is selected so that the vapor content of the heated Me ¬ medium, that is, the feedwater, between 40 and 100%, for example 60% lies.
Die von der Speisewasserleitung 4 abzweigenden Rohre 6 der ersten Stufe 7 weisen hier zudem an ihrem Eintritt lokale Querschnittsverengungen 9, beispielsweise Drosseln 10, auf. Die Drosseln 10 gewährleisten praktisch über den gesamten Lastbereich des solarthermischen Durchlaufdampferzeugers ei¬ nen erhöhten Druckverlust in dessen Eintrittsbereich. Dabei wird ein stabiler und gleichmäßiger Durchfluss des vorgewärmten Speisewassers durch die Rohre 6 gefördert. The pipes 6 of the first stage 7 branching off from the feedwater line 4 also have local cross-sectional constrictions 9, for example throttles 10, at their inlet. The throttles 10 ensure virtually over the entire load range of the solar thermal continuous steam generator ei ¬ NEN increased pressure drop in its inlet region. In this case, a stable and uniform flow of preheated feedwater through the tubes 6 is promoted.

Claims

Patentansprüche claims
1. Dampferzeuger (1) für eine solarthermische Kraftwerksanla¬ ge mit einer Anzahl von solar beheizbaren und ein aufzuhei- zendes Arbeitsmedium führenden parallel geschalteten Rohren1. steam generator (1) for a solar thermal power plant ¬ ge with a number of solar heated and a aufzuhei- zendes working medium leading parallel connected pipes
(6) , die eine erste (7) und eine zweite Stufe (8) umfassen, wobei eine Druckausgleichseinrichtung (2) zwischen der ersten(6), comprising a first (7) and a second stage (8), wherein a pressure compensation device (2) between the first
(7) und der zweiten Stufe (8) angeordnet ist, an der die pa¬ rallel geschalteten Rohre (6) miteinander in Wirkverbindung stehen. (7) and the second stage (8) is arranged, at which the parallel ¬ connected pipes (6) are in operative connection with each other.
2. Dampferzeuger (1) nach Anspruch 1, wobei das Arbeitsmedium in den Rohren (6) direkt verdampfbar ist. 2. Steam generator (1) according to claim 1, wherein the working medium in the tubes (6) is directly evaporable.
3. Dampferzeuger (1) nach Anspruch 2, wobei das Arbeitsmedium Wasser ist. 3. Steam generator (1) according to claim 2, wherein the working medium is water.
4. Dampferzeuger (1) nach einem der Ansprüche 1 bis 3, wobei die Lage der Druckausgleichseinrichtung (2) so gewählt ist, dass der Dampfgehalt des aufzuheizenden Mediums, das heißt, des Speisewassers, zwischen 40 und 100% liegt. 4. Steam generator (1) according to one of claims 1 to 3, wherein the position of the pressure compensation device (2) is selected so that the vapor content of the medium to be heated, that is, the feed water is between 40 and 100%.
5. Dampferzeuger (1) nach einem der vorhergehenden Ansprüche, wobei mindestens ein Rohr (6) in seinem Eintrittsbereich eine lokale Querschnittsverengung (9) aufweist. 5. Steam generator (1) according to one of the preceding claims, wherein at least one tube (6) in its inlet region has a local cross-sectional constriction (9).
6. Dampferzeuger (1) nach Anspruch 5, wobei die lokale Querschnittsverengung (9) eine Drossel (10) ist. 6. steam generator (1) according to claim 5, wherein the local cross-sectional constriction (9) is a throttle (10).
7. Solarthermische Kraftwerksanlage mit einem Dampferzeuger (1) nach einem der vorhergehenden Ansprüche. 7. Solar thermal power plant with a steam generator (1) according to one of the preceding claims.
8. Solarthermische Kraftwerksanlage nach Anspruch 6, wobei die die Rohre (6) Komponenten von Parabolrinnen- oder Fres- nel-Kollektoren (5) sind. 8. Solar thermal power plant according to claim 6, wherein the tubes (6) are components of parabolic trough or Fresnel collectors (5).
PCT/EP2012/051849 2011-02-17 2012-02-03 Solar-thermal steam generator WO2012110329A2 (en)

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DE102011004267.9 2011-02-17
DE102011004267A DE102011004267A1 (en) 2011-02-17 2011-02-17 Solar thermal steam generator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109780740A (en) * 2019-03-13 2019-05-21 孔宇庭 A kind of automatic compensation conduit of medium and solar energy heat conducting pipeline

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