中文摘要：

为研究与优化线性菲涅尔太阳能系统的光学性能,本文采用蒙特卡罗光线追迹法（MCRT）自编程建立了整个系统的三维光学模型。基于此,分析了不同反射镜型式、瞄准位置、形面误差以及地理位置等对系统光学性能的影响规律,优化了反射镜几何参数与瞄准位置。结果表明,不同镜面型式下系统性能均存在最优值,此时圆柱面与抛物面镜光学性能几乎一样。对于吸热管热流分布,可通过优化设计反射镜瞄准线来提高热流分布均匀性,一定的形面误差也会改善其均匀性。在地理上,该系统在北纬20°~50°的范围内年均光学效率在52%~37%之间,可在我国大部分地区应用。

英文摘要：

A 3D Monte Carlo ray tracing model was developed in FORTRAN for a linear Fresnel reflector solar collector in order to investigate and optimize its optical performance.The performance of three typical mirrors,the effects of the mirror aim lines,slope error,and location,etc.were investigated.The results show that the optimal radius and focal length could be found for the cylindrical and parabolic mirrors,respectively.The optimized cylindrical mirror could achieve the same performance as that of the optimized parabolic mirror.The uniformity of the concentrated solar flux on the absorber tube could be improved by designing the aim lines and using the mirror with a certain slope error.In addition,the LFR system whose yearly mean optical efficiency ranges between52%and 37%from N20° to N50° could be applied in most area of China.