基于晴空因子的塔式太阳能集热器热效率计算

Calculation of Thermal Efficiency of Solar Tower Collector Based on Clear Sky Factor

太阳辐射强度空间分布不均会影响塔式光热镜场能量转换效率。太阳辐射光线经气溶胶、云层和悬浮颗粒物等的折射、吸收和散射到达地面后,又受到定日镜场光学效率的影响,使得集热器出口熔盐温度变化较大。基于此,建立云层分类、镜场光线模拟和集热器换热的综合模型,仿真验证气象因素对塔式热发电系统输出效率的影响。

The uneven distribution of solar radiation intensity affects the energy conversion efficiency of the tower Photothermal mirror field.Through the refraction,absorption and scattering of by aerosols,clouds and suspended particles,solar radiation reaches the ground.After that,the solar radiation is influenced by the optical efficiency of the setting mirror field,which makes the temperature of the molten salt of the collector at the outlet of the collector change greatly.Based on this,a comprehensive model of cloud layer classification,mirror field ray simulation and heat exchanger heat exchanger was established in this paper.The influence of meteorological factors on the output efficiency of the tower type thermal power generation system was verified by simulation.