半透明玻璃管束吸热芯聚集太阳光传输特性分析

TRANSFERRING PERFORMANCES OF CONCENTRATED SUNLIGHT INSIDE QUARTZ GLASS PIPE BUNDLE ABSORBER

为研究石英玻璃管束吸热芯对聚集太阳光的传输穿透性能,建立石英玻璃管束吸热芯多表面界面反射、折射和介质吸收光路传播模型。采用动态包覆面蒙特卡洛射线踪迹法(MCRTM)加速算法,模拟分析聚集太阳光束在石英玻璃管束吸热芯的传输过程,考虑玻璃光束倾斜角度、结构参数和聚集太阳光集中度等因素对聚集太阳光辐射传输性质的影响。结果表明石英玻璃管束吸热芯(长度5 cm,壁厚0.4 mm)对聚集太阳光的吸收比低于5%,是一种较为理想的低吸收换热芯材料,此结论为半透明玻璃管束吸热芯的创新发展提供了参考依据。

In order to investigate the transferring characteristics of concentrated sunlight inside the quartz glass pipe bundles,a ray transferring model was constructed involving the reflection,refraction and absorption behavior between multiple surfaces.The influences of the incline angles and the structure parameters of the pipe bundle,and the concentration ratio of the concentrated sunlight on the performances of the transferring performance was carried out by an accelerated Monte-Carlo ray-tracing method.Results show that the quartz glass pipe bundles are suitable as low-absorption unit locating in the front of the volumetric receiver since its absorptions of the incident sunlight is lower than 5%with 5 cm length and 0.4 cm thickness.Conclusions provide valuable reference to the development of the volumetric receiver.