Abstract—

This study presents the results of ultraviolet radiation measurement in a truncated compound parabolic concentrator. The measurements were performed by using of a portable ultraviolet sensor both inside and outside the concentrator without the presence of receiver, under direct and diffuse solar radiation, to calculate the real value of the concentration factor of ultraviolet radiation. The truncated compound parabolic concentrator was designed in Solid Works and built via 3D printing, with a theoretical concentration factor of 4.6. This study showed the differences in the form of the ultraviolet radiation when measurements were made under direct radiation and diffuse solar radiation. These differences are important when measurements were made along the concentrator profile, at different heights within the concentrator and, also, along it. Finally, a concentration factor of 3.3 and 1.4 were calculated on a sunny and a cloudy days, respectively. These values correspond to a concentration efficiency of 71.7 and 31.3%, respectively, against the theoretical value of 4.6 proposed in the design.

中文翻译：

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截断复合抛物面聚光器在不同天气条件下的紫外线浓缩因子

摘要-

这项研究提出了截断的复合抛物线集中器中紫外线辐射的测量结果。在直接和漫射的太阳辐射下，通过使用集中器内部和外部没有接收器的便携式紫外线传感器进行测量，以计算紫外线辐射的浓缩因子的实际值。截断的复合抛物线浓缩器是在Solid Works中设计的，并通过3D打印构建，理论浓缩系数为4.6。这项研究表明，在直接辐射和散射太阳辐射下进行测量时，紫外线辐射形式的差异。当沿着集中器轮廓，在集中器内以及沿着高度的不同高度进行测量时，这些差异非常重要。最后，在晴天和阴天分别计算出3.3和1.4的集中系数。这些值分别对应于71.7％和31.3％的浓缩效率，而设计中建议的理论值为4.6。