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Caustics as an Alternate of Ray Tracing to Evaluate Heliostat Mirrors

机译：焦散作为射线追踪以评估定日镜的替代方案

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Solar thermal power generation is based on the concept of concentrating solar radiation to provide high temperatureheat for electricity generation via conventional power cycles. The high relative cost of optical subsystems necessitates a careful study of their components. The capital cost of the heliostat field in central receiver power plants is significant, reaching up to 50% of the capital investment. Therefore, it is essential to maximize the energy yield from a heliostat with a given mirror area. Solar collector fields are typically modeled by ray-tracing or convolution methods; however, no general method is available for engineering analysis. We propose the use of caustics to predict the image of the sun reflected by an arbitrary mirror of focal lengthFand apertureaon a target. The method of caustics was validated against SolTRACE, a ray-tracing code developed bythe US National Renewable Energy Laboratory (NREL).
机译：太阳能热发电是基于集中太阳辐射以通过常规功率循环为发电提供高温热量的概念。光学子系统的相对成本较高，因此必须仔细研究其组件。中央接收器发电厂的定日镜领域的资本成本非常高，高达资本投资的50％。因此，必不可少的是在给定的镜面面积下从定日镜获得最大能量。通常通过光线追踪或卷积方法对太阳能收集器场进行建模。但是，没有通用的方法可用于工程分析。我们建议使用焦散法来预测由目标上焦距和光圈的任意反射镜反射的太阳图像。使用美国国家可再生能源实验室（NREL）开发的光线追踪代码SolTRACE验证了苛性碱方法。

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