Testing and Evaluation of Second-Generation Heliostat Mirror Modules

摘要

The testing and evaluation of the Second Generation Heliostat mirror modules are reported here. It was found that all of the previous design problems of mirror modules, such as silver corrosion, thermal defocus, and high glass stress, were eliminated by one or more of these designs. The single most important conclusion to be drawn from this program is that laminated glass mirror module designs are the most technically conservative; it is Sandia's recommendation that this concept be used for near-term applications. Two other Second Generation designs were found to have potential for reduced weight and improved performance, but one design required some significant design changes, and both require further outdoor testing to better estimate their lifetime potential. (ERA citation 07:043057)