Abstract Conversion of sunlight into electricity is the fastest growing commercial means of deploying renewable energy at utility scale. The two primary methods for conversion are photovoltaics and concentrating solar thermal power. The complimentary advantages of these two methods motivates interest in hybridizing the two. Here, a spectral beam splitting approach is designed and tested for application as a retrofit in existing parabolic trough concentrating solar power facilities, the first large scale test using such an approach with low-cost silicon photovoltaic cells. Such an approach leverages the existing capital cost of the plant with the potential to boost plant output. The novel on-sun testing here focused on the electrical performance of a silicon photovoltaic module integrated into the most common parabolic trough geometry with a net aperture area of 1.7 m2. The spectral beam splitter has a solar weighted reflectance of 71.2%, and delivered an average flux to the cells of 17,828 W/m2 representing a concentration ratio of 25×, within 10% of the prediction of the optical ray tracing model. The two photovoltaic modules achieved an average efficiency - based upon measured irradiance delivered to the cells - of 12.4% (or 3% if normalized to the total aperture of the area of the mirror). A corresponding decrease in thermal performance was observed when the retrofit was added. Overall the design is capable of providing a path to retrofit existing parabolic trough powerplants to provide a 13% increase in power output using commercially available photovoltaic technology.

中文翻译：

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使用现有抛物线槽式发电厂对混合 PV/T 进行光谱分束改造，以提高功率输出

摘要 将阳光转化为电能是在公用事业规模部署可再生能源的增长最快的商业手段。两种主要的转换方法是光伏发电和聚光太阳能热发电。这两种方法的互补优势激发了将两者混合的兴趣。在这里，光谱分束方法被设计和测试，作为对现有抛物线槽聚光太阳能发电设施的改造应用，这是第一次使用这种方法对低成本硅光伏电池进行大规模测试。这种方法利用了工厂现有的资本成本，并有可能提高工厂的产量。此处新颖的日照测试侧重于集成到最常见抛物线槽几何结构中的硅光伏模块的电气性能，净孔径面积为 1.7 平方米。光谱分束器具有 71.2% 的太阳能加权反射率，并为电池提供 17,828 W/m2 的平均通量，代表 25 倍的聚光比，在光线追踪模型预测的 10% 以内。这两个光伏模块实现了 12.4% 的平均效率 - 基于测量的传递到电池的辐照度 - 12.4%（如果归一化为镜子区域的总孔径，则为 3%）。添加改造后，观察到热性能相应下降。