陈应天光伏发电系统聚光理论跟跟踪理论之三文档.pdf

Solar Energy 80 (2006) 268–271 /locate/solener Off-axis aberration correction surface in solar energy application Y.T. Chen *, B.H. Lim, C.S. Lim Department of Astronomy and Applied Physics, University of Science and Technology of China, China Received 5 January 2005; received in revised form 19 February 2005; accepted 20 February 2005 Available online 25 March 2005 Communicated by: Associate Editor Lorin L. Vant-Hull Abstract A new fixed aberration correction surface for applications in solar energy is proposed. The surface equation was derived based on the theory of focusing heliostat and the technique of canting the mirror array at a particular incident angle. The performance of the optimized new surface is simulated and compared with that of a spherical surface for two different ranges of incident angles, i.e., 0–33 and 33–57. The comparison result shows that there are considerable improvements: not only is the size and concentration of the suns image improved, but it is also possible to shift the hot spot from noon time to early morning and late afternoon. 2005 Published by Elsevier Ltd. Keywords: Off-axis aberration correction; Canting; Continuous surface; Asymmetrical curvature 1. Introduction at different incident angles to exhibit an off-axis aberra- tion-free surface (Su and Cui, 2004). Among many famous aberration correction surfaces All the above technologies developed in the field of in optics, the on-axis Sch