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利用光线追迹的方法,考虑太阳形状、余弦损失、阴影及遮挡损失的影响,建立线性菲涅耳反射(LFR)聚光器的三维光学几何模型,给出其光斑能流密度分布的计算式,采用Matlab软件编程实现该算法。将计算结果与美国国家可再生能源实验室(NREL)开发的SolTrace软件仿真结果相对比,光斑能流密度分布曲线基本吻合,证明了该算法的正确性。为了获得更高的镜场聚光效率,对比了不同反射镜面型对LFR聚光器的影响。
Considering the effects of sun shape, cosine loss, shading and occlusion loss, a three-dimensional optical geometric model of a linear Fresnel reflection (LFR) condenser is established by using ray tracing method. The formula for calculating the energy density distribution of the spot is given , Using Matlab software programming to achieve the algorithm. Comparing the calculated result with the SolTrace software simulation result developed by the National Renewable Energy Laboratory (NREL), the spot energy density distribution curve basically agrees, which proves the correctness of the algorithm. In order to obtain higher condenser efficiency of the field, the effect of different reflector types on the LFR concentrator was compared.