TY  - JOUR
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, Stefan
A1  - Sauerborn, Markus
T1  - Solar Concentrating Systems Using Small Mirror Arrays
JF  - Journal of solar energy engineering
N2  - 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 (figure mentioned by Solucar at Solar Paces Conference, Seville, 2006) 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.
Y1  - 2010
U6  - https://doi.org/10.1115/1.4000332
SN  - 0199-6231
SN  - 1528-8986 (eISSN)
VL  - 132
IS  - 1
PB  - ASME
CY  - New York
ER  - 
TY  - JOUR
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, Stefan
A1  - Sauerborn, Markus
T1  - Solar Concentrating Systems Using Small Mirror Arrays / Göttsche, Joachim ; Hoffschmidt, Bernhard ; Schmitz, Stefan ; Sauerborn, Markus ; Buck, Reiner ; Teufel, Edgar ; Badstübner, Karin ; Ifland, David ; Rebholz, Christian
JF  - Proceedings of the 2nd International Conference on Energy Sustainability - 2008 : : presented ... August 10 - 14, 2008, Jacksonville, Florida, USA / sponsored by Advanced Energy Systems Division, ASME; Solar Energy Division, ASME
Y1  - 2009
SN  - 9780791843208
N1  - International Conference on Energy Sustainability ; (2 : ; 2008.08.10-14 : ; Jacksonville, Fla.) ; ES ; (2 : ; 2008.08.10-14 : ; Jacksonville, Fla.)
SP  - 1
EP  - 5
PB  - ASME
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, S.
A1  - Sauerborn, Markus
A1  - Rebholz, C.
A1  - Iffland, D.
A1  - Badstübner, R.
A1  - Buck, R.
A1  - Teufel, E.
T1  - Test of a mini-mirror array for solar concentrating systems
T2  - EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings ; 7th - 10th October 2008, Lisbon, Portugal : key lectures / ISES, International Solar Energy Society. Vol. 1
Y1  - 2008
SN  - 978-1-61782-228-5
SP  - 1242
EP  - 1250
PB  - Sociedade Portuguesa De Energia Solar (SPES)
CY  - Lissabon
ER  - 
TY  - CHAP
A1  - Achenbach, Timm
A1  - Bosch, Timo
A1  - Breitbach, Gerd
A1  - Göttsche, Joachim
A1  - Sauerborn, Markus
T1  - Theoretical and experimental investigations regarding open volumetric receivers of CRS
T2  - Energy procedia : proceedings of the SolarPACES 2013 International Conference
Y1  - 2013
SN  - 1876-6102
VL  - Vol. 49
SP  - 1259
EP  - 1268
ER  -