为实现太阳能量利用最大化,提出一种基于导光板型聚光器的自然光光纤采光系统。通过分光模块,将不可见光波段的能量转换成电能,进而驱动补偿系统中的LED阵列,实现各种天气条件下的照明能量稳定输出。利用仿真软件对光线进行追迹,结果表明,在室内面积为100 m 2,照明12 h的情况下,太阳能可以供应约60%的总光通量。为进一步验证所设计系统的可行性和准确性,搭建了用于光纤采光系统的导光板型聚光系统,并对其进行聚光实验测试。当光线收集模块数量从10增加到100时,聚光器的聚光效率从83。6%降低至65。1%。在室外对光纤采光系统进行双轴跟踪测试,光纤输出的照度和太阳输入的辐照度变化趋势基本一致,说明光纤采光系统具有良好的聚光性能。

In this study, a natural optical fiber illumination system is proposed based on a lightguide plate concentrator to maximize the utilization of solar energy. Further, the energy in the invisible band is converted into electricity using the spectral module for driving the LED array in the compensation system. Thus, a stable lighting energy output can be obtained under various weather conditions. A simulation software is used for light tracing, and the obtained results denote that approximately 60% of the total luminous flux in case of an indoor area of 100 m ² and lighting for 12 h can be supplied by solar energy. Subsequently, a lightguide plate concentrator system is developed and tested via concentration experiments for developing a natural optical fiber illumination system to further verify the feasibility and accuracy of the proposed system. When the number of light collection modules increase from 10 to 100, the optical efficiency of the concentrators decreases from 83.6% to 65.1%. The variation trend of the output illuminance of the optical fiber is consistent with the input irradiance of the solar during the biaxial tracking test for optical fiber illumination system at outdoor, indicating the good light gathering performance of the proposed system.