Selimoglu Ozgur, Turan Rasit
The Center for Solar Energy Research and Applications (GÜNAM), Middle East Technical University, Ankara, Turkey.
Opt Express. 2012 Aug 13;20(17):19137-47. doi: 10.1364/OE.20.019137.
The material and processing costs are still the major drawbacks of the c-Si based photovoltaic (PV) technology. The wafer cost comprises up to 35-40% of the total module cost. New approaches and system designs are needed in order to reduce the share of the wafer cost in photovoltaic energy systems. Here we explore the horizontally staggered light guide solar optics for use in Concentrated Photovoltaic (CPV) applications. This optical system comprises a lens array system coupled to a horizontal light guide which directs the incoming light beam to its edge. We have designed and simulated this system using a commercial ray tracing software (Zemax). The system is more compact, thinner and more robust compared to the conventional CPV systems. Concentration levels as high as 1000x can easily be reached when the system is properly designed. With such a high concentration level, a good acceptance angle of + -1 degree is still be conserved. The analysis of the system reveals that the total optical efficiency of the system could be as high as %94.4 without any anti-reflection (AR) coating. Optical losses can be reduced by just accommodating a single layer AR coating on the initial lens array leading to a %96.5 optical efficiency. Thermal behavior of high concentration linear concentrator is also discussed and compared with a conventional point focus CPV system.
材料和加工成本仍然是基于晶体硅的光伏（PV）技术的主要缺点。晶圆成本占整个组件成本的35%-40%。为了降低光伏能源系统中晶圆成本的占比，需要新的方法和系统设计。在此，我们探索用于聚光光伏（CPV）应用的水平交错式光导太阳能光学器件。该光学系统包括一个与水平光导耦合的透镜阵列系统，该光导将入射光束导向其边缘。我们使用商业光线追踪软件（Zemax）对该系统进行了设计和模拟。与传统的CPV系统相比，该系统更紧凑、更薄且更坚固。如果系统设计得当，很容易实现高达1000倍的聚光水平。在如此高的聚光水平下，仍可保持±1度的良好接收角。对该系统的分析表明，在没有任何抗反射（AR）涂层的情况下，系统的总光学效率可能高达94.4%。通过在初始透镜阵列上仅设置单层AR涂层，可降低光学损耗，从而使光学效率达到96.5%。还讨论了高浓度线性聚光器的热行为，并与传统的点聚焦CPV系统进行了比较。
