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首页> 外文会议>Nonimaging optics: Efficient design for illumination and solar concentration VI >Truncation of the secondary concentrator (CPC) between maximum performances and economical requirements
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Truncation of the secondary concentrator (CPC) between maximum performances and economical requirements

机译：在最大性能和经济要求之间截断辅助浓缩器（CPC）

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A central solar plant, based on beam-down optics, is composed of a field of heliostats, a tower reflector and a ground receiver. The tower reflector is an optical system comprises of a quadric surface mirror (hyperboloid), where its upper focal point coincides with the aim point of a heliostat field and its lower focal point is located at a specified height, coinciding with the entrance plane of the ground receiver. The optics of a tower reflector requires the use of ground secondary concentrator, composed of a cluster of CPCs, because the quadric surface mirror always magnifies the sun image. There is an intrinsic correlation between the tower reflector position and its size on one hand, and the geometry, dimensions and reflective area of the secondary concentrator on the other hand; both are related to the heliostat field reflective area. Obviously, when one wishes to have a smaller tower reflector by placing it closer to the upper focal point, the image created at the lower focus will be larger, resulting in a larger secondary ground concentrator. The present work analyses the ways for a substantial decrease of the size of the ground concentrator cluster (and, implicit, the concentrators area) via truncation, without significant sacrifice of the performance, although some increase of the optical losses is inevitable. This offers a method for cost effective design of future central solar plants utilizing the beam down optics..
机译：中央太阳能发电厂，基于向下的光学元件，由定日镜场，塔式反射器和地面接收器组成。塔式反射镜是一个光学系统，由二次曲面镜（双曲面镜）组成，其上焦点与定日镜场的目标点重合，下焦点位于指定的高度，与光的入射平面重合。地面接收器。塔式反射镜的光学器件需要使用由次级CPC组成的地面辅助聚光器，因为二次曲面镜总是会放大太阳图像。一方面，塔筒反射器的位置及其大小与二次聚光器的几何形状，尺寸和反射面积之间存在内在的关联；两者都与定日镜场反射区域有关。显然，当人们希望通过将其放置在靠近较高焦点的位置而拥有较小的塔式反射器时，在较低焦点处生成的图像将较大，从而导致较大的辅助地面集中器。目前的工作分析了通过截断使地面集中器簇（和隐式集中器区域）的大小显着减小的方法，而不会显着牺牲性能，尽管不可避免地会增加一些光损耗。这提供了一种利用射束向下光学器件经济地设计未来的中央太阳能发电厂的方法。

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