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首页> 外文会议>High and low concentrator systems for solar electric applications VIII >Monte Carlo ray-tracing simulations of luminescent solar concentrators for building integrated photovoltaics
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Monte Carlo ray-tracing simulations of luminescent solar concentrators for building integrated photovoltaics

机译：用于建筑集成光伏的发光太阳能聚光器的蒙特卡洛光线追踪模拟

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摘要

Luminescent solar concentrators (LSCs) have the ability to receive light from a wide range of angles, concentrating the captured light onto small photo active areas. This enables greater incorporation of LSCs into building designs as windows, skylights and wall claddings in addition to rooftop installations of current solar panels. Using relatively cheap luminescent dyes and acrylic waveguides to effect light concentration onto lesser photovoltaic (PV) cells, there is potential for this technology to approach grid price parity. We employ a panel design in which the front facing PV cells collect both direct and concentrated light ensuring a gain factor greater than one. This also allows for flexibility in determining the placement and percentage coverage of PV cells during the design process to balance reabsorption losses against the power output and level of light concentration desired. To aid in design optimization, a Monte-Carlo ray tracing program was developed to study the transport of photons and loss mechanisms in LSC panels. The program imports measured absorption/emission spectra and transmission coefficients as simulation parameters with interactions of photons in the panel determined by comparing calculated probabilities with random number generators. LSC panels with multiple dyes or layers can also be simulated. Analysis of the results reveals optimal panel dimensions and PV cell layouts for maximum power output for a given dye concentration, absorbtion/emission spectrum and quantum efficiency.
机译：发光太阳能聚光器（LSC）能够从各种角度接收光，从而将捕获的光聚集到较小的光敏区域上。除了现有的太阳能电池板的屋顶安装之外，这还可以将LSC更好地纳入建筑物设计中，例如窗户，天窗和壁板。使用相对便宜的发光染料和丙烯酸类波导来将光集中到较小的光伏（PV）电池上，该技术有可能接近电网价格平价。我们采用面板设计，其中正面PV电池同时收集直接光和集中光，确保增益系数大于1。这还允许在设计过程中灵活地确定PV电池的位置和覆盖百分比，以平衡再吸收损耗与所需的功率输出和所需的光集中水平。为了帮助优化设计，开发了蒙特卡洛射线追踪程序，以研究LSC面板中的光子传输和损耗机理。该程序将测得的吸收/发射光谱和透射系数作为模拟参数导入，面板中的光子相互作用是通过将计算的概率与随机数发生器进行比较而确定的。具有多种染料或层的LSC面板也可以进行模拟。结果分析表明，对于给定的染料浓度，吸收/发射光谱和量子效率，最大功率输出的最佳面板尺寸和PV电池布局。

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