圆柱型集热器腔体优化设计及光学性能分析

Optimization design and optical performance analysis of cylindrical collector cavity

为了提高碟式太阳能热发电系统中圆柱型集热器的光学性能,文章利用Tracepro光学软件建立了圆柱型集热器-聚光器仿真模型,并通过数值模拟分析了当圆柱型集热器采光口平面与聚光器焦点之间的距离发生变化时,采光口平面上能流密度的分布情况,以确定圆柱型集热器的最佳位置,此外,还分析了锥腔径比对圆柱型集热器光学性能的影响。分析结果表明:采光口平面距离聚光器焦点越近,采光口平面上能流密度的分布趋势越趋近于高斯分布,即越接近实际分布情况;锥腔径比越大,圆柱型集热器的光学性能越好,当锥腔径比为0.95时,圆柱型集热器的光学效率为75.3%,比锥腔径比为0.30时高出14.1%。

In order to improve the optical performance of the cylindrical collector in the dish solar system, a numerical model of the cylindrical collector-concentrator is established by using tracepro optical software. Through numerical simulation, the distribution of energy flux density on the daylight opening plane of collector is determined when the distance between the daylight opening plane of collector and the focus of the concentrator is changed, and the optimal placement position of the cylindrical collector is determined. In addition, the structure of the collector cavity is optimized, analyzing the influence of the the diameter ratio of the cone cavity to the optical performance of the cylindrical collector. The analysis results show that the closer the daylight opening plane is to the focus of the concentrator, the more the distribution of the energy flux density conforms gaussian distribution, and it is closer to the actual situation; the larger the diameter ratio of the cone cavity, the better the optical performance of the collector cavity well,when the diameter ratio of the cone cavity is 0.95, the optical efficiency of the cylindrical collector is 75.3%, which is 14.1% higher than the diameter ratio of the cone cavity at 0.30. The analysis results of the article provide reference for the design and installation of cylindrical collectors.