Timinger A, Kribus A, Doron P, Ries H
Optics & Energy Consulting, Stoeberlstrasse 68, D-80686 Munich, Germany.
Appl Opt. 2000 Mar 1;39(7):1152-8. doi: 10.1364/ao.39.001152.
For technical reasons, large three-dimensional compound parabolic concentrators (CPC's) are often built from facets with either no or only one-dimensional curvature. We analyze CPC approximations made with various numbers of axial and circumferential subdivisions. Incident radiation within half-angles of 10 degrees and 30 degrees is considered. The reflectivity of the mirrors is assumed to be 90% or 95%. The performance of faceted concentrators can be significantly improved by optimization as compared with heuristic CPC approaches. The highest increase in transmission that we observed was 19% greater as compared with that of a heuristic CPC approximation. The shapes of the optimized concentrators differ from that of a classic CPC, and most of the optimized concentrators are longer than a classic CPC. For practical concentrators with a small number of facets, the optimized geometry provides better performance than a heuristic approximation of the CPC shape.
由于技术原因，大型三维复合抛物面聚光器（CPC）通常由具有零曲率或仅一维曲率的小平面构建而成。我们分析了采用不同数量轴向和周向细分所得到的CPC近似。考虑了入射角在10度和30度半角范围内的辐射。假设镜面的反射率为90%或95%。与启发式CPC方法相比，通过优化可显著提高多面聚光器的性能。我们观察到，与启发式CPC近似相比，传输率最高可提高19%。优化后的聚光器形状与经典CPC不同，且大多数优化后的聚光器比经典CPC更长。对于面数较少的实际聚光器，优化后的几何形状比CPC形状的启发式近似具有更好的性能。
