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Techniques to Measure Solar Flux Density Distribution on Large-Scale Receivers

Röger, Marc und Herrmann, Patrik und Ulmer, Steffen und Ebert, Miriam und Prahl, Christoph und Göhring, Felix (2014) Techniques to Measure Solar Flux Density Distribution on Large-Scale Receivers. Journal of Solar Energy Engineering (136), 031013-1. DOI: 10.1115/1.4027261. ISSN 0199-6231.

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Kurzfassung

Flux density measurement applied to central receiver ystems delivers the spatial distribution of the concentrated solar radiation on the receiver aperture, measures receiver input power, and monitors and might control heliostat aimpoints. Commercial solar tower plants have much larger aperture surfaces than the receiver prototypes tested in earlier research and development (R&D) projects. Existing methods to measure the solar flux density in the receiver aperture face new challenges regarding the receiver size. Also, the requirements regarding costs, accuracy, spatial resolution, and measuring speed are different. This paper summarizes existent concepts, presents recent research results for techniques that can be applied to large-scale receivers and assesses them against a catalog of requirements. Direct and indirect moving bar techniques offer high measurement accuracy, but also have the disadvantage of large moving parts on a solar tower. In the case of external receivers, measuring directly on receiver surfaces avoids moving parts and allows continuous measurement but may be not as precise. This promising technique requires proper scientific evaluation due to specific reflectance properties of current receiver materials. Measurement-supported simulation techniques can also be applied to cavity receivers without installing moving parts. They have reasonable uncertainties under ideal conditions and require comparatively low effort.

Dokumentart:Zeitschriftenbeitrag
Titel:Techniques to Measure Solar Flux Density Distribution on Large-Scale Receivers
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Röger, Marcmarc.roeger@dlr.de
Herrmann, PatrikNICHT SPEZIFIZIERT
Ulmer, SteffenNICHT SPEZIFIZIERT
Ebert, MiriamNICHT SPEZIFIZIERT
Prahl, Christophchristoph.prahl@dlr.de
Göhring, Felixfelix.goehring@dlr.de
Datum:August 2014
Erschienen in:Journal of Solar Energy Engineering
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI :10.1115/1.4027261
Seitenbereich:031013-1
ISSN:0199-6231
Status:veröffentlicht
Stichwörter:flux density measurement, receiver input power, central receiver system, solar tower
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende Solarsysteme
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Qualifizierung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung > Qualifizierung
Hinterlegt von: Anja Kruschinski
Hinterlegt am:07 Aug 2014 15:47
Letzte Änderung:07 Aug 2014 15:47

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