焦距优化的碟式太阳能热发电聚光器建模分析

Modeling analysis of dish CSP solar concentrator based on optimized focus

太阳能碟式发电,目前较多采用球面反射镜聚光,因光斑几乎为零,无法精确控制且焦点为圆心,对应桁架结构大,加工工艺完成困难且几何聚光比低。为了克服这些缺陷,建立旋转抛物面聚光系统模型:通过论证太阳能取代化石能源的必要性,为得到高聚光比-高光热转化效率的聚光器,设计10 kW碟式热发电系统的碟式聚光器,且研究太阳在聚光器形成光斑与旋转抛物面的焦距关系,当光斑取实际最小值,得到对应的焦距值。应用Solidworks软件建立对应碟式聚光器的3D模型,而且运用Matlab对3D模型进行分析。得到的光斑最小值与碟式的聚光器3D模型为实际工程设计提供碟式光热发电数据基础和指导性意见。

At present, dish solar concentrator mostly uses spherical mirror. The light spot is almost zero and can't be precisely controlled. The focus point is the center of the circle, truss structure is too large to complete processing, and the geometric concentrating ratio is low. In order to overcome these defects, the rotary parabolic concentrator system model was established: by demonstrating the necessity of solar energy replacing fossil fuel, to get high concentration ratio-high photothermal conversion concentrator, 10 kW dish concentrator was designed, the relationship between p and b was researched, and the focal length was calculated with the minimum light spot. Solidworks was used to build the 3D model of dish concentrator, and the model was analyzed through Matlab. The obtained minimum light spot and dish concentrator 3D model provide data base and guidance observations of dish solar thermal power generation technology for the practical engineering design.