Development of an optical method to align a high-flux solar furnace.

High-flux solar furnaces are valuable tools for applied research and development in solar energy. However, misalignment of concentrator facets can produce optical losses and lower the concentration ratio of these systems. This study proposes a practical method to align a faceted solar furnace. The optical method uses a computer projector that illuminates the facets with a well-defined light pattern to quantitatively and qualitatively determine any misalignment associated with the mirrors. Through the Monte Carlo ray-tracing technique, the complete solar furnace, projector, and observation plane are optically modeled for the development of the methodology. A theoretical sensitivity analysis of the technique is reported, along with the experimental validation of the determined mirror misalignments, which results in a detection accuracy of 0.32 mrad.