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首页> 外文会议>Conference on nonimaging optics: efficient design for illumination and solar concentration XIV >Tracking and shape errors measurement of concentrating heliostats
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Tracking and shape errors measurement of concentrating heliostats

机译：追踪和形状误差测量浓缩光晕岩

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In solar tower power plants, factors such as tracking accuracy, facets misalignment and surface shape errors of concentrating heliostats are of prime importance on the efficiency of the system. At industrial scale, one critical issue is the time and effort required to adjust the different mirrors of the faceted heliostats, which could take several months using current techniques. Thus, methods enabling quick adjustment of a field with a huge number of heliostats are essential for the rise of solar tower technology. In this communication is described a new method for heliostat characterization that makes use of four cameras located near the solar receiver and simultaneously recording images of the sun reflected by the optical surfaces. From knowledge of a measured sun profile, data processing of the acquired images allows reconstructing the slope and shape errors of the heliostats, including tracking and canting errors. The mathematical basis of this shape reconstruction process is explained comprehensively. Numerical simulations demonstrate that the measurement accuracy of this "backward-gazing method" is compliant with the requirements of solar concentrating optics. Finally, we present our first experimental results obtained at the THEMIS experimental solar tower plant in Targasonne, France.
机译：在太阳能塔发电厂中，诸如跟踪精度，刻面和集中光晕目的地的刻面和表面形状误差是对系统效率的重要性。在工业规模中，一个关键问题是调整面位的光晕目录的不同镜子所需的时间和精力，这可能需要使用当前技术几个月。因此，能够快速调整具有大量Heliostats的领域的方法对于太阳能塔技术的兴起是必不可少的。在该通信中描述了一种新方法，用于定向器表征，其利用位于太阳能接收器附近的四个摄像机，并同时记录由光学表面反射的太阳图像。从知识从测量的太阳轮廓中，所获取的图像的数据处理允许重建定向器的斜率和形状误差，包括跟踪和倾斜误差。综合解释了这种形状重建过程的数学依据。数值模拟表明，这种“后向凝视方法”的测量精度符合太阳能集中光学器件的要求。最后，我们展示了我们在法国Targasonne的主题实验太阳能塔厂获得的第一个实验结果。

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