槽式太阳能集热管的弯曲变形会造成聚光能量的溢出损失,需要进行测量和分析。提出基于无人机摄影的槽式太阳能集热管弯曲测量方法：采用无人机搭载高分辨可见光相机,实现对槽式太阳能集热管的图像采集;基于边缘检测算法对集热管图像进行处理,最终获得集热管的弯曲变形量。基于光线追迹理论建立槽式聚光器聚光过程数学模型,推导弯曲集热管的溢出损失计算公式。选取3种不同弯曲量的集热管进行测量实验,测得的最大弯曲量分别为1.23、7.75、18.79 mm,平均测量误差为±0.75 mm,计算对应的溢出损失分别为0.02%、0.57%、3.72%,结果表明：集热管弯曲量较大时,会造成较大的溢出损失。
Abstract
The bending of the collector tube in the solar trough thermal power plant will cause the spillage loss of the concentrated energy, which needs to be measured and analyzed. The bending measurement method of the collector tube based on the UAV photography is proposed. The UAV is equipped with high-resolution visible camera to realize the images acquisition of the collector tubes. Based on the edge detection algorithm, the images of the collector tubes are processed, and finally the bending value of the collector tubes is obtained. Based on the ray tracing theory, the mathematical model of the concentrating process of the solar trough concentrator is established, and the calculation formulas of the spillage loss of the bended collector tube is deduced. Three kinds of collector tubes with different bending values are selected for measurement experiments. The measured maximum bending values are 1.23, 7.75, 18.79 mm respectively, the average measurement error is ±0.75 mm, and the corresponding spillage losses are 0.02%, 0.57%, 3.72% respectively. The results show that when the collector tube bending amount is larger, it will cause larger overflow loss.
关键词
太阳能热发电 /
槽式太阳能集热管 /
光学效率 /
光线追迹
Key words
solar thermal power generation /
trough solar collector /
optical efficiency /
ray tracing
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基金
福建省自然科学基金面上项目（2019J01876）
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