圆锥面太阳聚光器的理论研究与设计  

Theoretical Study and Design of Conical Solar Concentrator

作　　者：程金铭[1,2] 郑宏飞[1] 戴静[1] 陶涛[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]襄樊学院机械与汽车工程学院,湖北襄阳441053

出　　处：《北京理工大学学报》2012年第1期22-27,共6页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(51076016);湖北省自然科学基金资助项目(2010CDA010)

摘　　要：对聚光器为圆锥面、接收器为圆柱面的太阳能集热器的性能进行了研究.导出了单锥面聚光器的聚光比和跟踪精度的计算公式,给出了接收器上的照射长度以及接收器表面聚光比分布的数学表达式,并对聚光比、跟踪精度、材料利用率等方面进行了详细的分析,结果表明从聚光比、材料利用率及跟踪精度等方面来考虑,45°是单锥面聚光器的最佳半顶角.分析了单锥面集热器存在的采光面积与聚光比和接收器长度之间的矛盾,进而提出了多锥面组合聚光器;多锥面组合聚光器能在接收器长度一定的情况下增加采光面积、提高聚光比,克服了单锥面聚光器的矛盾,并且具有设计上的灵活性.The theoretical performance of a conical solar concentrator with a cylindrical receiver is studied in this paper.The calculation formulae of concentration ratio and sun-tracking accuracy for single-section conic concentrator were deduced.The irradiated length on the receiver was determined and the axial concentration distribution along its surface was expressed mathematically.Three factors of concentration ratio,tracking precision and material utilization ratio were analyzed and it was found that 45° is the most appropriate half apex angle for a single-section conic concentrator.It is indicated that the single-section conic concentrator exists the contradictions among the un-shaded area of the aperture,concentration ratio and the length of the receiver.To overcome such a disadvantage,the multi-section conic concentrator is considered and designed,of which,it is feasible to increase the un-shaded area of the aperture and concentration ratio without changing the receiver length.Meanwhile,the design of multi-section conic concentrator could be flexible.

关 键 词：太阳能集热器 圆锥面聚光器 多锥面组合聚光器 

分 类 号：TK513[动力工程及工程热物理—热能工程]