Optimization of the least-material approach for passive Ultra-High CPV cooling

The attention around Ultra-High CPV is increasing year by year, because of the potential cost-cutting achievable by increasing the concentration ratio. In these systems, an adequate thermal management becomes particularly important: cooling systems are required to be compact, reliable and efficient. In this work, the geometry of a passive heat sink for a 4000x CPV application is optimized to reduce the volume and the costs, limiting the effects on the thermal performance. The same approach is used to model the behavior of a UHCPV heat sink in New Orleans, LA (USA): the hourly cell temperatures are presented in the paper.