Solar Thermal Energy Utilization: German Studies on Technology and Application. Questo articolo non è disponibile.Solar Thermal Energy Utilization: German Studies on Technology and Application

During the past decade, several heliostat development projects have been implemented in various parts of the world (MBB, ASINEL, MARTIN MARIETTA, ARCO SOLAR, etc.). These projects have concen­ trated on the segmented glass mirror design, as used in the solar tower facilities of SSPS (Spain), BARSTOW (USA), THEMIS (France) [1] as well as in other test and prototype facilities. The main emphasis in these projects has been on the individually curved glass facets, on dimensioning, mounting and adjusting them, as well as on th~ structural rigidity of the system as a whole. Particular attention has had to be paid to developing drive units with minimum play: the tracking concept generally employed, where the points of rotation of azimuth and elevation almost coincide, places great demands on the drive as regards play and tracking accuracy, and has resulted in some extremely compact, but also some very heavy and expensive units.

Reflectors.- Study on the Development of Metal-Membrane Heliostats.- Experimental Study on the Development of a Light Weight, Wind Resistant Heliostat Based on a Reflecting Fluorpolymer Foil.- Final Report Terminal Concentrators.- Investigation and Selection of Materials Resistant to Temperatures and Radiation to Design and Construct a Ceramic/Metallic-Ceramic Secondary Concentrator.- Receivers.- 200 kW Stirling Engine for SSP Module; Solar Stirling Receiver Concepts.- Evaluation of Convective Heat Transfer Coefficients and Comparison with Semi Empirical Correlations in a Volumetric Ceramic Receiver.- Investigation on the Development of a Volumetric Receiver with Staggered Structure.- Solar Chemistry.- Thermochemical H2 ― Production with a Solar Driven Sulfur-Iodine Process.