利用TracePro模拟分析导光管的传输效率

Analysis of Transmission Tube Efficiency of Light Pipe Based on TracePro

基于光线追踪法,利用光学模拟软件TracePro,可模拟各种导光管采光系统的采光性能。通过模拟多种不同类型导光管的传输效率,分析其变化规律,并与相关规程的实验参考值比较,研究发现:内壁光反射比越高、有效长度越小时,直管的传输效率就越高,模拟值也越接近规程中实验参考值;弯头的传输效率仅与弯曲角度和内壁光反射比有关,与管径无关,这与规程的实验结果相悖。

Daylighting performance of various tubular daylighting systems can be simulated by applying the optical simulation software(i.e.TracePro)based on ray-tracing method.Through simulating the transmission tube efficiency(TTE)of some different types of light pipes,analyzing TTE’s change rules and comparing with the reference values from experiments in the relevant regulation,some findings can be concluded.A higher reflectance of the inner surface and a smaller aspect ratio will lead to a higher TTE of the straight pipe and a closer simulation value to the reference values in the regulations.The TTE of the bends is only related to the bending angle and the inner surface’s reflectance,but nothing to do with the pipe diameter,which is contrary to the experimental results in the regulations.