【摘要】 文章针对小型线性菲涅尔聚光系统设计了一套能流密度测试装置，研究了呼和浩特地区风沙大和纬度高等特点下系统能流密度的变化。结果表明：线性菲涅尔聚光系统的能流密度存在明显的季节性差异，夏季在11:00-15:00焦平面的平均能流密度较高，而春季和秋季在9:00-10:00和15:00-16:00焦平面上能流密度较高，冬季9:00-10:00的平均能流密度较高，夏季焦平面上的平均能流密度比冬季高2.27 kW/m~2。反射镜表面连续积尘54 d后，焦平面上的能流密度下降了62.7%，以镜面积尘密度作为量化指标发现，镜面积尘密度每增加1 g/m~2，焦平面上的平均能流密度就会下降0.63 kW/m~2。该研究可为小型线性菲涅尔聚光系统在干旱高纬度地区运行维护提供数据参考。更多还原

【Abstract】 A set of solar flux testing device is designed for the linear Fresnel system, and the changes of solar flux are studied under the characteristics of heavy sandstorm and high latitude in Hohhot area. The results show that there are obvious differences in the solar flux of the linear Fresnel system in different seasons. The solar flux is higher in the range of 11:00-15:00 in summer,while that solar flux is higher in the range of 9:00-10:00 and 15:00-16:00 in spring and autumn,and the solar flux is higher in the 9:00 to 10:00 in winter, and the solar flux in summer is 2.268 8kW/m~2higher than that in winter. After 54 days of dust accumulation on the mirror, the solar flux of the focal plane decreased by 62.7%. The solar flux on the focal plane decreases by 0.627 8 kW/m~2when the dust density of the mirror increases by 1 g/m~2. This study can provide data support for the operation and maintenance of small linear Fresnel concentrating systems in arid and high latitude areas.更多还原