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提出一种计算太阳能聚光器聚光焦斑能流密度分布的新方法。在考虑太阳形状、聚光器表面形状误差、跟踪误差、接收器位置误差、漫反射及接收器遮挡作用等各项光学误差和影响因素的基础上,结合旋转抛物面聚光器的光学特性,采用有限元法对焦面能流密度分布进行计算,并与文献中的结果进行比较,证明了该方法的正确性和可行性。同时又对半球形接收器和圆柱形接收器进行了实例计算,结果表明该方法不受聚光器或接收器面型的限制,算法简单,通用性也较强,从而为系统的优化设计和能流密度的测量奠定基础。
A new method for calculating the energy density distribution of the focused spot of solar concentrator is proposed. Based on the optical errors and influencing factors of sun shape, surface shape error of condenser, tracking error, receiver position error, diffuse reflection and receiver occlusion, combined with the optical characteristics of rotating parabolic concentrator, The finite element method is used to calculate the energy density distribution of the focal plane, and compared with the results in the literature, which proves the correctness and feasibility of the method. At the same time, the examples of hemispherical receiver and cylindrical receiver are also calculated. The results show that this method is not limited by the concentrator or receiver surface shape, the algorithm is simple and the versatility is strong, so as to optimize the system design and Energy density measurement laid the foundation.