高倍聚焦太阳光光纤传输光谱和衰减分析  

ANALYSIS OF SPECTRUM AND ATTENUATION FOR HIGH CONCENTRATED SUNLIGHT TRANSMITTED THROUGH FIBERS

作　　者：宋记锋 杨勇平 王慧一 姜如高 曹桢 李丰钧 

机构地区：[1]新能源与可再生能源北京市重点实验室,华北电力大学,北京102206

出　　处：《太阳能学报》2011年第11期1646-1651,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(61004084);国家重点基础研究发展(973)计划(2009CB219801);中央高校基本科研业务费专项资金(09QG18)

摘　　要：开发了地平坐标系-光敏定位混合式太阳跟踪及聚焦平台,在此基础上完成大直径PMMA塑料光纤聚焦能流6m距离传输试验,进行了连续9h的检测记录,获得光纤输出光功率谱密度分布数据,其色温相对自然光低约600K,色度坐标、显示指数、主波长等与自然光接近,实验发现室外照度与光纤输出光色温存在线性关联,并进行函数拟合,针对光纤传输光损进行定量测量与计算,结果揭示光纤端面存在2dB幅度的耦合损失。A sunlight tracking and concentrating platform adopting horizontal coordinate system combined with pho- tosensitive sensor was developed, which can realize high position resolution. A sunlight concentrating and transmis- sion experiment lasted for 9 hours has been carried out using 6m long PMMA fire based on that platform. It is found that color temperature of light transmitted by fibers is 600K lower than that of nature light. The spectrum of light transmitted by fibers is similar to that of nature light. This similarity also exists in chromaticity coordinate, color rendering index, dominant wavelength between light transmitted by fibers and nature light. A linear relation was found between illumination outside and color temperature of light transmitted by fibers, and corresponding formulas based on function fitting have been achieved. A quantitative determination of flux loss has been carried out and the results showed that there is an attenuation about 2dB existing on the interface of the fiber.

关 键 词：太阳光 光纤 传输 衰减 

分 类 号：TK519[动力工程及工程热物理—热能工程]