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Solar Concentrating Systems Using Small Mirror Arrays

Göttsche, Joachim und Hoffschmidt, Bernhard und Schmitz, Stefan und Sauerborn, Markus und Buck, Reiner und Teufel, Edgar und Badstübner, Kathrin und Ifland, David und Rebholz, Christian (2010) Solar Concentrating Systems Using Small Mirror Arrays. Journal of Solar Energy Engineering, 132 (1), Seiten 110031-110034. ASME. DOI: 10.1115/1.4000332. ISSN 0199-6231.

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Kurzfassung

The cost of solar tower power plants is dominated by the heliostat field making up roughly 50% of investment costs. Classical heliostat design is dominated by mirrors brought into position by steel structures and drives that guarantee high accuracies under wind loads and thermal stress situations. A large fraction of costs is caused by the stiffness requirements of the steel structure, typically resulting in 20 kg/m2 steel per mirror area. The typical cost figure of heliostats is currently in the area of 150 € /m2 caused by the increasing price of the necessary raw materials. An interesting option to reduce costs lies in a heliostat design where all moving parts are protected from wind loads. In this way, drives and mechanical layout may be kept less robust, thereby reducing material input and costs. In order to keep the heliostat at an appropriate size, small mirrors (around 10x10 cm2) have to be used, which are placed in a box with a transparent cover. Innovative drive systems are developed in order to obtain a cost-effective design. A 0.5x0.5 m2 demonstration unit will be constructed. Tests of the unit are carried out with a high-precision artificial sun unit that imitates the sun’s path with an accuracy of less than 0.5 mrad and creates a beam of parallel light with a divergence of less than 4 mrad.

Dokumentart:Zeitschriftenbeitrag
Titel:Solar Concentrating Systems Using Small Mirror Arrays
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Göttsche, JoachimSIJ
Hoffschmidt, BernhardSIJ
Schmitz, StefanSIJ
Sauerborn, MarkusSIJ
Buck, ReinerDLR
Teufel, EdgarDLR
Badstübner, KathrinFraunhofer IZM
Ifland, DavidFraunhofer IZM
Rebholz, ChristianFraunhofer IZM
Datum:Februar 2010
Erschienen in:Journal of Solar Energy Engineering
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:132
DOI :10.1115/1.4000332
Seitenbereich:Seiten 110031-110034
Verlag:ASME
ISSN:0199-6231
Status:veröffentlicht
Stichwörter:Heliostat, Solarkraftwerk
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 Technische Thermodynamik > Solarforschung
Hinterlegt von: Dr.-Ing. Reiner Buck
Hinterlegt am:20 Jan 2011 10:16
Letzte Änderung:26 Mär 2013 13:26

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