Optical performance and weight estimation of a heliostat with ganged facets
Amsbeck, Lars and Buck, Reiner and Pfahl, Andreas and Uhlig, Ralf (2008) Optical performance and weight estimation of a heliostat with ganged facets. Journal of Solar Energy Engineering, 130 (1), . DOI: 10.1115/1.2804630. ISSN 0199-6231.
Full text not available from this repository.
In standard heliostat design, the usual strategy of cost reduction is to increase the mirror area of the heliostats. This not only leads to a reduction of specific drive cost but also to an increase of the torques caused by the wind loads, resulting in higher specific weight and higher specific drive power. These drawbacks are avoided when small heliostats are coupled. At the torque tube heliostat (TTH), the mirrors are mounted on torque tubes to simplify the coupling mechanism for the elevation angle. Ray tracing calculations were done to obtain optimized heliostat configurations and to compare the energy yield of a heliostat field built of 288 m2 TTHs with a conventional heliostat field. To get an idea of the weight reduction potential of the TTH, the dimensions of the torque tubes, the secondary axis tubes, and the mirror support structure were weight optimized via finite element method. The layout criterion was a mean mirror error of 2.5 mrads under wind load and gravity.
|Title:||Optical performance and weight estimation of a heliostat with ganged facets|
|Journal or Publication Title:||Journal of Solar Energy Engineering|
|In ISI Web of Science:||Yes|
|Keywords:||solar power, solar heat, solar tower, central receiver, heliostat|
|HGF - Research field:||Energy|
|HGF - Program:||Renewable Energies|
|HGF - Program Themes:||E SF - Solar research|
|DLR - Research area:||Energy|
|DLR - Program:||E SF - Solar research|
|DLR - Research theme (Project):||E - Solare Hochtemperatursysteme (old)|
|Institutes and Institutions:||Institute of Technical Thermodynamics > Solar Research|
|Deposited By:||Lars Amsbeck|
|Deposited On:||10 Jun 2008|
|Last Modified:||27 Apr 2009 14:58|
Repository Staff Only: item control page