Optimized secondary concentrators for a partitioned central receiver system

A Review on Solar Concentrators with Multi-surface and Multi-element Combinations

“…Timinger [47] presented secondary concentrator with nonregular shapes for increasing the concentration of radiation from a given field of heliostats, is well suitable for partitioning the receiver into several units, arranged side by side. It is combined by two CPCs and its entrance and exit aperture could be designed as rectangle or circle, thus obtain different GCR and focus' uniformity.…”

“…However, for CPV system, energy distribution uniformity of focus becomes a very important design objective because uniformity has a significant effect on the photoelectric conversion efficiency of solar cell. Meanwhile, inhomogeneous distribution makes it difficult to cool the solar cell [20,21,47,55,56,[71][72][73][74][75][76][77][78]85,86]. For CPV/T system, there are two ways for utilization.…”

“…Uniformity of energy distribution is very important for CPV system. Hence, as described in references [20,21,47,55,85,[88][89][90][91], the reflectors near the receiver is mostly flat surface which does not change the order of light transmission. Also, TIR concentrators can be used as homogenizer for CPV system [73][74][75][76][77].…”

Design and Analysis of a Multi-Window Aperture Structure for a Small Particle Solar Receiver

“…The REFOS project had their secondary concentrators arranged in a honeycomb pattern as seen in Figure 3.34 [34]. Other designs for hexagonal aperture secondary concentrators for central receivers can be found in [35].…”

“…The plates had holes drilled through for cooling. In 1999 a German solar project [35] There are a few candidate solutions for the secondary concentrators' reflective layer.…”