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Wind loads on heliostats and photovoltaic trackers at various Reynolds numbers

Pfahl, Andreas und Uhlemann, Heiko (2011) Wind loads on heliostats and photovoltaic trackers at various Reynolds numbers. Journal of Wind Engineering and Industrial Aerodynamics, 99 (9), 964 bis 968. DOI: 10.1016/j.jweia.2011.06.009. ISSN 0167-6105.

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Offizielle URL: http://www.elsevier.com/locate/jweia

Kurzfassung

Wind loads on heliostats are usually determined at boundary layer, low-speed wind tunnels at which the design full-scale Reynolds number cannot be reached. In doing so, it is supposed the wind load coefficients are Reynolds number independent, which is known to be the case for sharp edged bodies. But for the stow position the usually round torque tube is directly exposed to the wind and could influence the wind loads. By measurements in a high-pressure wind tunnel, it can be demonstrated that the design-relevant wind load coefficients are not Reynolds number dependent. However, the inclination of the mirror plane in stow position, due to the deflection of the heliostats structure at high Reynolds number, leads to increased wind loads and must be considered. The results are also valid for photovoltaic trackers of similar shape.

Dokumentart:Zeitschriftenbeitrag
Titel:Wind loads on heliostats and photovoltaic trackers at various Reynolds numbers
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Pfahl, AndreasSF-PN ST
Uhlemann, HeikoHeiko.Uhlemann@dnw-germany.aero
Datum:September 2011
Erschienen in:Journal of Wind Engineering and Industrial Aerodynamics
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:99
DOI :10.1016/j.jweia.2011.06.009
Seitenbereich:964 bis 968
ISSN:0167-6105
Status:veröffentlicht
Stichwörter:heliostat, PV tracker, wind load, Reynolds number, high pressure wind tunnel, central receiver, solar tower, concentrated solar power, solar thermal
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 - Solare Hochtemperatursysteme (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Solarforschung
Hinterlegt von: Andreas Pfahl
Hinterlegt am:16 Dez 2011 17:00
Letzte Änderung:25 Nov 2014 15:33

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