DE102012012683A1 - Method for electric power generation in cyclic process in two-stage combined gas and steam turbine process, involves obtaining high temperatures with positive effect of efficiency in low pressures upto material limit - Google Patents
Method for electric power generation in cyclic process in two-stage combined gas and steam turbine process, involves obtaining high temperatures with positive effect of efficiency in low pressures upto material limit Download PDFInfo
- Publication number
- DE102012012683A1 DE102012012683A1 DE201210012683 DE102012012683A DE102012012683A1 DE 102012012683 A1 DE102012012683 A1 DE 102012012683A1 DE 201210012683 DE201210012683 DE 201210012683 DE 102012012683 A DE102012012683 A DE 102012012683A DE 102012012683 A1 DE102012012683 A1 DE 102012012683A1
- Authority
- DE
- Germany
- Prior art keywords
- efficiency
- steam turbine
- increase
- combined gas
- achieving
- 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
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- 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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Abstract
Description
Die Erfindung betrifft ein auf dem GUD-Prozess bezogenes thermisches Verfahren, welches durch spezielle Modifikationen die Gesamteffizienz verbessert. Eine derartige Lösung wird in erster Linie im Bereich der Energiewirtschaft benötigt.The invention relates to a thermal process based on the GUD process, which improves the overall efficiency by means of special modifications. Such a solution is needed primarily in the energy industry.
Der weltweit steigende Energiebedarf erhöht die anthropogenen Belastungen für Klima und Umwelt. Sparsamer Umgang mit Energie und effiziente thermische Wandlerprozesse werden immer wichtiger, um dem Klimawandel entgegen zu wirken. Hocheffiziente kombinierte Gas- und Dampfturbinenprozesse übernehmen auch im Zeitalter erneuerbarer Energien den verlässlichen Anteil der Stromerzeugung. Der Stand der Technik befindet sich auf einem sehr hohen technischen Niveau (Bayern Irsching, Siemens ~60%). Modifikationen wie die Gasturbinen-Eintrittstemperatur zu erhöhen oder auch die mehrfache Unterteilung des Verdampfungsprozesses mit zusätzlicher Zwischenüberhitzung sind angestrebte Maßnahmen, um Kraftwerke für die Belange des 21. Jahrhunderts mit großem Aufwand fit zu machen. Im Forschungsverbund abayfor (
Eine Erhöhung der Frischdampfparameter durch zusätzliche Energiezufuhr im Abhitzekessel vergrößert zwar die Leistung des Dampfkraftprozesses, verlangt aber aufwendige konstruktive Maßnahmen, die erst bei sehr hohem Druck 260 bar und Temperaturen über 600°C eine Effizienzsteigerung bewirken. Die Verbindung hohe Temperaturen bei hohen Drücken stößt an die bekannten Materialgrenzen im Dampfkraftprozess, sodass diese Option aus technischer Sicht eher theoretisch bleibt.Although increasing the live steam parameters by additional energy supply in the waste heat boiler increases the performance of the steam power process, but requires complex design measures that only at very high pressure 260 bar and temperatures above 600 ° C cause an increase in efficiency. The combination of high temperatures at high pressures encounters the known material limits in the steam power process, so this option remains rather theoretical from a technical point of view.
Es ist deshalb Aufgabe der Erfindung, den kombinierten Gas- und Dampfturbinenprozess so zu gestalten, das eine Leistungs- und Effizienzsteigerung ohne die benannten Abhängigkeiten möglich wird.It is therefore an object of the invention to design the combined gas and steam turbine process so that a performance and efficiency increase without the aforementioned dependencies is possible.
Die Aufgabe wird erfindungsgemäß im Wesentlichen durch die kennzeichnenden Merkmale der Ansprüche 1 bis 8 gelöst. Für eine Hochtemperatur-Zwischenüberhitzung im nachgeschalteten Dampfturbinenprozess nutzt ein separat befeuerter Erhitzer warmes Abgas aus dem Abhitzekessel als Verbrennungsluft, um Dampf aus der letzten Verdampfungsstufe im Mittel- bzw. Niederdruckbereich bis zur Materialgrenze zu erwärmen. Anschließend folgt die Entspannung in einer gekühlten Heißdampfturbine. Das Abgas der Hochtemperatur-Zwischenüberhitzung wird wieder an entsprechender Stelle dem Abhitzekessel zugeführt, um es weiter wie beim Stand der Technik bis zur Nutzgrenze abzukühlen. Bei dieser Art der Zwischenüberhitzung bleiben die vorherigen Prozessabläufe weitestgehend unbeeinflusst. Die zusätzliche Befeuerung dient nur zur Temperaturanhebung der letzten Entspannungsstufe, was die Enthalpiedifferenz in der Turbine vergrößert und damit die auskoppelbare Leistung erhöht. Probleme durch Nassdampf-Schaufelerosion bei der Niederdruck-Entspannung bestehen nicht mehr, da sie weitgehend außerhalb des kritischen Bereiches abläuft. Je höher die Überhitzungstemperatur, umso größer die Leistung der Dampfturbine. Allerdings müssen die ersten Reihen der Beschaufelung analog einer Gasturbine gekühlt werden. Neben den üblichen Kühlmethoden wie Film-, Prall- oder Innenkühlung lassen sich die Schaufeln auch durch Oberflächenverdampfung schützen, indem ausgekoppeltes Kondensat die Heißgaskonturen benetzt. Da mit steigenden Temperaturen über 800°C die zulässige Spannung der Erhitzerwerkstoffe abnimmt, lassen sich bei den vorhandenen niedrigen Drücken bis zur Materialgrenze höhere Temperaturen erzielen, was die Prozesseffizienz verbessert. Bei Bedarf sorgt ein zusätzliches Gebläse für die erforderliche Pressung, um die Strömungsverluste im Erhitzer auszugleichen.The object is achieved according to the invention essentially by the characterizing features of
Mit der vorgeschlagenen Lösung werden somit die Aufgaben der Erfindung gelöst.With the proposed solution, the objects of the invention are thus achieved.
Niederdruck 5 bar; 180°C
Hochtemperatur-Überhitzung 5 bar; 800°C
High temperature overheating 5 bar; 800 ° C
Bezugszeichenliste LIST OF REFERENCE NUMBERS
- 11
- Generatorgenerator
- 22
- Abhitzekesselwaste heat boiler
- 33
- Hochdruck-DampfturbineHigh-pressure steam turbine
- 44
- separat befeuerter Hochtemperatur-Zwischenüberhitzerseparately fired high temperature reheater
- 55
- Mittel- bzw. Niederdruck HeißdampfturbineMedium or low pressure steam turbine
- 66
- Kondensatorcapacitor
- 77
- Kondensatpumpecondensate pump
- 88th
- Kondensatcondensate
- 99
- Dampfsteam
- 1010
- Abgaseinbindungexhaust integration
- 1111
- Kühldampf für die SchaufelkühlungCooling steam for blade cooling
- 1212
- optional Kondensat für die Oberflächenverdampfungoptional condensate for surface evaporation
- 1313
- Stützgebläseassistance fan
- 1414
- Brennstofffuel
- 1515
- VerbrennungsluftmischerCombustion air mixer
- 1616
- Abzweig VerbrennungsluftBranch combustion air
- 1717
- Entspannung HochdruckturbineRelax high-pressure turbine
- 1818
- Niederdruck-Entspannung nach dem Stand der TechnikLow-pressure relaxation according to the prior art
- 1919
- Hochtemperatur-ÜberhitzungHigh temperature overheating
- 2020
- Entspannung in der gekühlten Mittel- bzw. Niederdruck HeißdampfturbineRelaxation in the cooled medium- or low-pressure superheated steam turbine
- 2121
- Bereich Stand der TechnikArea of prior art
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte Nicht-PatentliteraturCited non-patent literature
- www.abayfor.de/kw21 [0002] www.abayfor.de/kw21 [0002]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210012683 DE102012012683A1 (en) | 2012-06-27 | 2012-06-27 | Method for electric power generation in cyclic process in two-stage combined gas and steam turbine process, involves obtaining high temperatures with positive effect of efficiency in low pressures upto material limit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210012683 DE102012012683A1 (en) | 2012-06-27 | 2012-06-27 | Method for electric power generation in cyclic process in two-stage combined gas and steam turbine process, involves obtaining high temperatures with positive effect of efficiency in low pressures upto material limit |
Publications (1)
Publication Number | Publication Date |
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DE102012012683A1 true DE102012012683A1 (en) | 2014-01-02 |
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DE201210012683 Withdrawn DE102012012683A1 (en) | 2012-06-27 | 2012-06-27 | Method for electric power generation in cyclic process in two-stage combined gas and steam turbine process, involves obtaining high temperatures with positive effect of efficiency in low pressures upto material limit |
Country Status (1)
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DE (1) | DE102012012683A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0586425B1 (en) * | 1991-05-25 | 1998-08-05 | Saarbergwerke Aktiengesellschaft | Energy generating process in a combined gas/steam generating power station |
DE20313279U1 (en) * | 2003-08-27 | 2003-10-16 | Siemens Ag | Steam power plant |
US20080250790A1 (en) * | 2007-04-13 | 2008-10-16 | Shinya Imano | High-temperature steam turbine power plant |
-
2012
- 2012-06-27 DE DE201210012683 patent/DE102012012683A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0586425B1 (en) * | 1991-05-25 | 1998-08-05 | Saarbergwerke Aktiengesellschaft | Energy generating process in a combined gas/steam generating power station |
DE20313279U1 (en) * | 2003-08-27 | 2003-10-16 | Siemens Ag | Steam power plant |
US20080250790A1 (en) * | 2007-04-13 | 2008-10-16 | Shinya Imano | High-temperature steam turbine power plant |
Non-Patent Citations (1)
Title |
---|
www.abayfor.de/kw21 |
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R012 | Request for examination validly filed | ||
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
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Effective date: 20150101 |