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首页> 外文会议>Nonimaging optics: Efficient design for illumination and solar concentration VIII >Static high-irradiance solar concentration by gradient-index optics
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Static high-irradiance solar concentration by gradient-index optics

机译：梯度折射率光学系统在静态高辐射太阳集中

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摘要

Novel solutions for realistic gradient-index (GRIN) lenses are presented, that create the possibility of nominally stationary photovoltaic concentrators capable of daylong averaged flux concentration levels of order 103. One transfers the burden of precision solar tracking from massive units on which numerous solar modules are mounted, to miniaturized mechanical components inside modules that are completely stationary. The best optical properties for this aim would appear to be perfect imaging - a case where imaging and nonimaging objectives coalesce because perfect imaging is non-trivially synonymous with attaining the fundamental limit to concentration. Our GRIN profiles surmount limitations of classical Luneburg solutions that resulted in GRIN lenses being deemed physically unattainable idealizations for sunlight. To wit, while preserving perfect imaging, our GRIN profiles eliminate the need for refractive indices near unity, markedly reduce the range of refractive indices required, and permit arbitrary focal length. They are also amenable to realistic materials and fabrication technologies. Raytrace simulations confirm that they offer an unprecedented solution to this problem - even accounting for chromatic aberration and misalignment. Eliminating massive precision tracking of large photovoltaic arrays in favor of precision cm-scale lens tracking inside the modules opens the possibility of rooftop CPV. The perception that high solar concentration is inseparably linked to massive trackers is supplanted here by a different paradigm.
机译：提出了用于现实梯度折射率（GRIN）透镜的新颖解决方案，这为名义上固定的光伏聚光器提供了可能性，该聚光器能够实现整整103天内的平均通量浓度水平。一种解决方案可以将精确的太阳能跟踪负担从大量单元转移到大型单元上安装在完全固定的模块内部的微型机械部件上。实现此目标的最佳光学性能似乎是完美成像-在这种情况下，成像和非成像物镜会聚在一起，因为完美成像与获得浓度的基本限制并不同义。我们的GRIN轮廓克服了经典Luneburg解决方案的局限性，从而导致GRIN透镜被视为物理上无法实现的理想日光理想化。就是说，在保持完美成像的同时，我们的GRIN轮廓消除了对折射率接近统一的需要，显着减小了所需的折射率范围，并允许任意焦距。它们也适用于现实的材料和制造技术。光线跟踪仿真证实，它们为该问题提供了前所未有的解决方案-甚至考虑了色差和未对准。消除大型光伏阵列的大规模精确跟踪，而在模块内部进行精确厘米级的透镜跟踪，为屋顶CPV的开发提供了可能。在这里，以不同的范例取代了高太阳集中度与大型跟踪器密不可分的联系。

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  • 来源
  • 会议地点 San Diego CA(US)
  • 作者

    Panagiotis Kotsidas; Vijay Modi; Jeffrey M. Gordon;

  • 作者单位

    Mechanical Engineering Department, Columbia University, 220 S.W. Mudd Building, 500 W. 120th St., New York, NY 10027, USA;

    Mechanical Engineering Department, Columbia University, 220 S.W. Mudd Building, 500 W. 120th St., New York, NY 10027, USA;

    Department of Solar Energy and Environmental Physics, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 84990, Israel;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电气照明;
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