定日镜场效率参数模型的研究

Research on Field Efficiency Parameter Model of Heliostat

针对定日镜场相关效率参数问题,根据几何光学知识,计算出定日镜场中太阳高度角和方位角、每个定日镜与地面的倾角.采用光线追踪法,通过阴影遮挡效率、余弦效率、大气透射率集热器截断效率和镜面反射率构建光学效率参数模型,建立定日镜场的输出热功率的优化模型,在定日镜场达到额定功率的条件下,得出定日镜单位面积镜面平均输出热功率的优值.

Aiming at the efficiency parameters of heliostat field,according to the knowledge of geometrical optics,the height and azimuth of the sun in heliostat field and the inclination of each heliostat to the ground are calculated.Using ray tracing method,the optical efficiency parameter model is established by shadow occlusion efficiency,cosine efficiency,atmospheric transmittance collector truncation efficiency and mirror reflectivity,and the optimization model of the output thermal power of the heliostat field is established.Under the condition that the heliostat field reaches the rated power,the optimal value of the average output thermal power per unit area of the heliostat mirror is obtained.