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首页> 外文期刊>Applied Sciences >A Novel Concentrator Photovoltaic (CPV) System with the Improvement of Irradiance Uniformity and the Capturing of Diffuse Solar Radiation
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A Novel Concentrator Photovoltaic (CPV) System with the Improvement of Irradiance Uniformity and the Capturing of Diffuse Solar Radiation

机译：一种新型的聚光光伏系统（CPV），提高了辐照度均匀性并捕获了漫射太阳辐射

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This paper proposes a novel concentrator photovoltaic (CPV) system with improved irradiation uniformity and system efficiency. CPV technology is very promising its for highly efficient solar energy conversion. A conventional CPV system usually uses only one optical component, such as a refractive Fresnel lens or a reflective parabolic dish, to collect and concentrate solar radiation on the solar cell surface. Such a system creates strongly non-uniform irradiation distribution on the solar cell, which tends to cause hot spots, current mismatch, and degrades the overall efficiency of the system. Additionally, a high-concentration CPV system is unable to collect diffuse solar radiation. In this paper, we propose a novel CPV system with improved irradiation uniformity and collection of diffuse solar radiation. The proposed system uses a Fresnel lens as a primary optical element (POE) to concentrate and focus the sunlight and a plano-concave lens as a secondary optical element (SOE) to uniformly distribute the sunlight over the surface of multi-junction (MJ) solar cells. By using the SOE, the irradiance uniformity is significantly improved in the system. Additionally, the proposed system also captures diffuse solar radiation by using an additional low-cost solar cell surrounding MJ cells. In our system, incident direct solar radiation is captured by MJ solar cells, whereas incident diffuse solar radiation is captured by the low-cost solar cell. Simulation models were developed using a commercial optical simulation tool (LightTools?). The irradiance uniformity and efficiency of the proposed CPV system were analyzed, evaluated, and compared with those of conventional CPV systems. The analyzed and simulated results show that the CPV system significantly improves the irradiance uniformity as well as the system efficiency compared to the conventional CPV systems. Numerically, for our simulation models, the designed CPV with the SOE and low-cost cell provided an optical power ratio increase of about 17.12% compared to the conventional CPV without the low-cost cell, and about 10.26% compared to the conventional CPV without using both the SOE and additional low-cost cell.
机译：本文提出了一种新型的聚光光伏（CPV）系统，该系统具有改善的辐照均匀性和系统效率。 CPV技术非常有前景，可用于高效的太阳能转换。常规的CPV系统通常仅使用一个光学组件（例如菲涅尔折射透镜或反射抛物面反射镜）来收集太阳辐射并将其聚集在太阳能电池表面上。这样的系统在太阳能电池上产生强烈的不均匀辐射分布，这易于引起热点，电流失配，并降低了系统的整体效率。此外，高浓度的CPV系统无法收集漫射的太阳辐射。在本文中，我们提出了一种新型的CPV系统，该系统具有改进的辐照均匀性和散射太阳辐射的收集。拟议的系统使用菲涅耳透镜作为主要光学元件（POE）来聚集和聚焦阳光，而平凹透镜作为辅助光学元件（SOE）来将阳光均匀地分布在多结（MJ）的表面上太阳能电池。通过使用SOE，可以显着提高系统中的辐照度均匀性。另外，所提出的系统还通过使用围绕MJ电池的附加低成本太阳能电池来捕获漫射太阳辐射。在我们的系统中，入射的直接太阳辐射被MJ太阳能电池捕获，而入射的漫射太阳辐射被低成本太阳能电池捕获。仿真模型是使用商用光学仿真工具（LightTools？）开发的。对所提出的CPV系统的辐照度均匀性和效率进行了分析，评估，并与常规CPV系统进行了比较。分析和仿真结果表明，与传统的CPV系统相比，CPV系统显着提高了辐照度均匀性和系统效率。在数值上，对于我们的仿真模型，具有SOE和低成本电池的设计CPV与不具有低成本电池的常规CPV相比，光功率比提高了约17.12％，与不具有低成本电池的常规CPV相比，光功率比提高了约10.26％同时使用国有企业和其他低成本电池。

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