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首页> 外文会议>Nonimaging optics: Efficient design for illumination and solar concentration VIII >Optical Characterization of Solar Furnace System Using Fixed Geometry Non-Imaging Focusing Heliostat and Secondary Parabolic Concentrator
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Optical Characterization of Solar Furnace System Using Fixed Geometry Non-Imaging Focusing Heliostat and Secondary Parabolic Concentrator

机译：固定几何非成像聚焦定日镜和次级抛物面聚光器对太阳能炉系统的光学表征

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摘要

A novel solar furnace system has been proposed to be consisted of a Nonimaging Focusing Heliostat and a smaller parabolic concentrator. In this configuration, the primary heliostat consists of 11 × 11 array of concave mirrors with a total reflective area of 121 m2 while the secondary parabolic concentrator has a focal length of 30 cm. To simplify the design and reduce the cost, fixed geometry of the primary heliostat is adopted to omit the requirement of continuous astigmatic correction throughout a year. The overall performance of the novel solar furnace configuration can be optimized if the heliostat's spinning-axis is fixed in the orientation dependent on the latitude angle so that the annual variation of incidence angle is the least, which ranges from 33° to 57°. Case study of the novel solar furnace system has been performed with the use of ray-tracing method to simulate solar flux distribution profile for two different target distances, i.e. 50 m and 100 m. The simulated results have revealed that the maximum solar concentration ratio ranges from 20,530 suns to 26,074 suns for the target distance of 50 m, and ranges from 40,366 suns to 43,297 suns for the target distance of 100 m.
机译：已经提出了一种新颖的太阳能炉系统，该系统将由非成像聚焦定日镜和较小的抛物面聚光器组成。在这种配置中，主要定日镜由11×11凹面镜阵列组成，总反射面积为121 m2，而辅助抛物面聚光器的焦距为30 cm。为了简化设计并降低成本，采用了基本定日镜的固定几何形状，从而省略了整年连续进行像散矫正的要求。如果定日镜的旋转轴固定在取决于纬度角的方向上，则入射角的年变化最小，范围为33°至57°，则可以优化新型太阳能炉结构的整体性能。通过使用射线追踪方法对新型太阳炉系统进行了案例研究，以模拟两个不同目标距离（即50 m和100 m）的太阳通量分布曲线。模拟结果表明，对于50 m的目标距离，最大太阳集中度范围为20,530太阳到26,074太阳，对于100 m的目标距离，最大太阳集中度范围为40,366太阳到43,297太阳。

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