提出了计算槽式太阳能聚光器焦面能流密度分布的一种新方法。根据抛物槽式聚光器(PTC)的几何光学特性，给出了入射光线在接收平面上(沿宽度方向)的入射点坐标计算公式，将太阳的圆盘模型(Buie模型)改写成轴对称的线性模型，采用Origin软件中的频数统计工具对平面焦线的能流密度分布进行了计算，并利用CCD工业相机进行了实测实验。该计算方法函数关系较为简单明确，无需编程，计算量少，且适用于任意面型的槽式聚光器和线性接收器，可为槽式太阳能聚光系统的优化设计提供参考。

A new method is proposed for calculating the energy-flux-density distribution on focal plane of trough solar concentrators. According to the geometric optical properties of parabolic trough concentrator (PTC), the calculation formulae for incident point coordinate (along the width direction) of incident ray on the focal plane is derived. The sun′s disk model (Buie model) is developed to a linear model of axis symmetry. The energy flux density distribution on linear focal plane is characterized by using frequency statistics function of Origin software, and finally the test is performed with a CCD camera. This calculation method is simple and clear in the function relation, which requires no programming and less calculation, and is applicable for arbitrary surface contour of concentrators and linear receivers. It can offer useful reference for design and optimization of the trough solar concentrating systems.