太阳能空气压缩机的光学性能研究

Study on Optical Performance of Solar Air Compressor

太阳能热动力装置的光学性能对其整体工作效率有重要影响。采用蒙特卡洛光线追迹方法对所设计的太阳能空气压缩机系统的光学性能展开了模拟研究,利用Tracepro软件对点聚焦菲涅尔透镜、石英玻璃窗和吸热管等主要光学部件进行建模,以分析吸热表面的能量密度和太阳能空气压缩机的光学效率。模拟结果表明,吸热管内表面的能量分布是极不均匀的,且吸热管越长、通光孔直径越小、吸热管的内表面吸收率越高,系统的光学效率就越高,光热转化性能越好。

The optical performance of the solar thermal power device has an important influence on its total working efficiency.In this paper,the Monte Carlo ray trace method is used to simulate the optical performance of the designed solar air compressor system.In order to analyze the energy density distribution on the receiver and the optical efficiency of the solar air compressor,the geometrical model of the main optical components including the point-focusing Fresnel lens,quartz glass window,and heating pipe have been built using Tracepro software.The results show that the energy density distribution on the interior surfaces of the heating pipe is extremely non-uniform.What’s more,when the length of the heat absorption tube is increased,the diameter of the light hole is reduced,and the absorption rate of the heat pipe inner surface is increased,the optical efficiency of the system and the light-to-heat conversion performance will be improved.