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首先利用矢量分析,得到线性菲涅耳反射装置任一矩形镜元的入射角、反射矢量、跟踪倾角计算公式。然后通过坐标变换以及射线追踪法,得到被遮挡镜元所在平面上的阴影与遮挡分布,通过统计分析,给出线性菲涅耳镜场的阴影与遮挡效率。最后通过分析线性塔高、镜元间距、镜元宽度对LFR镜场阴影与遮挡效率的影响,给出线性菲涅耳聚光镜场的阴影与遮挡效率计算模型。
First of all, by using vector analysis, the formulas of incident angle, reflection vector and tracking inclination of any rectangular mirror of a linear Fresnel reflector are obtained. Then, the shadow and occlusion distribution on the plane where the occluded mirror element is located are obtained through the coordinate transformation and the ray tracing method. Through the statistical analysis, the shadowing and blocking efficiency of the linear Fresnel mirror field is given. Finally, by analyzing the influence of linear tower height, mirror spacing and mirror width on the shading and blocking efficiency of LFR, the calculation model of shading and blocking efficiency for linear Fresnel condenser field is given.