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Modelling and control of a solar-thermal parabolic trough DSG superheater with several parallel rows and central steam separation

Koch, Stephan und Hirsch, Tobias und Eck, Markus (2007) Modelling and control of a solar-thermal parabolic trough DSG superheater with several parallel rows and central steam separation. Energy Sustainability 2007 (ES2007), 2007-06-27 - 2007-06-30, Long Beach, CA (USA). ISBN 0-7918-3798-X.

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Kurzfassung

ABSTRACT In this paper, a solar-thermal parabolic trough power plant with direct steam generation (DSG) is investigated with respect to the controllability of the superheating section in a commercialscale facility with several parallel collector rows. The plant is operated in recirculation mode which has been proven to provide a good live steam quality under changing operating conditions in single-row systems. In a multiple-row collector field, the separation of the remaining water at the end of the evaporator can be achieved by using one central or several distributed separators. Central separation, which will be investigated in this work, appears to be the superior concept. The article proposes a decentralized adaptive proportionalintegral (PI) control approach together with a static output mapping for the control valves at the end of the superheating section. The section is fed by a single saturated steam mass flow which has to be distributed on the parallel superheater rows. Together with the individually controlled injection coolers in each row, the distribution control enables the solar field to provide the power block with a reliable steam temperature in the presence of significant local irradiance and input mass flow transients induced by varying solar intensity during the day and passing clouds.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Modelling and control of a solar-thermal parabolic trough DSG superheater with several parallel rows and central steam separation
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Koch, StephanNICHT SPEZIFIZIERT
Hirsch, TobiasNICHT SPEZIFIZIERT
Eck, MarkusNICHT SPEZIFIZIERT
Datum:30 Juni 2007
Referierte Publikation:Ja
In ISI Web of Science:Nein
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
ASME, NICHT SPEZIFIZIERT
ISBN:0-7918-3798-X
Status:veröffentlicht
Stichwörter:Parabolrinne, Direktverdampfung, Parallele Stränge, zentrale Abscheidung, adaptive Regelung, Überhitzer, parabolic trough, direct steam generation, superheater, parallel rows, central separation, adaptive control
Veranstaltungstitel:Energy Sustainability 2007 (ES2007)
Veranstaltungsort:Long Beach, CA (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-06-27 - 2007-06-30
Veranstalter :ASME
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Applikationsentwicklung (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Solarforschung
Hinterlegt von: Dr.-Ing. Tobias Hirsch
Hinterlegt am:28 Aug 2007
Letzte Änderung:12 Dez 2013 20:27

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