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Non-imaging reflector may present the advantage to eliminate the dark image in beam down 2-stage optical concentrator. The working principle of the non-imaging secondary (NIS) for an axial symmetric concentrator is revealed. The geometrical shape of NIS can generally be high order surface not restricted to the quadratic one in imaging optics or the CPC in non-imaging optics. The article has described the method to determine the parameters of the curve. To break the tradition in optics, we have demonstrated in the article that beside the quadratic curve, cubic curve can be equally used to form NIS. In the respect of solar energy application, we have made the discussion on the behavior of NIS for solar disc effect and how a new parameter can be used to optimize the design.
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Keywords:
- non-imaging optics /
- secondary reflector /
- concentrated photovoltaic /
- high-order polynomial
[1] Winston R, Minano J C 2004 Non-imaging Optics (Academic Press)
[2] Pinazo J M, Canada J, Arago F 1992 Solar Energy 49 175
[3] Khonkar H E I, Sayigh A A M 1994 Renewable Energy 5 376
[4] Chaves J 2008 Introduction to Non-imaging Optics (CRC Press)
[5] Cooke D, Gleckman P, Krebs H 1990 Nature (London) 346 802
[6] Gleckman P, Gallaguer J O, Winston R 1989 Nature (London) 339 (6221) 198
[7] Chen Y T, Chong K K, Bligh T P 2001 Journal of Solar Energy 71 155
[8] Chen Y T, Lim B H, Lim C S 2006 Journal of Solar Energy Engineering 128 245
[9] Chen Y T, He Z X, 2011 Acta Phys. Sin. 60 078104 (in Chinese) [陈应天, 何祚庥 2011 60 078104]
[10] Chen Y T, Lim B H, Lim C S 2005 Journal of Solar Energy 80 268
[11] Igel E A, Hughes R L 1979 Solar Energy 22 283
[12] Ries H, Schubnell M 1990 Solar Energy Materials 21 213
[13] Chen Y T China Patent 200510200037.X [20060531]
[14] Chen Y T China Patent 201210050545.4 [2012-07-17]
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[1] Winston R, Minano J C 2004 Non-imaging Optics (Academic Press)
[2] Pinazo J M, Canada J, Arago F 1992 Solar Energy 49 175
[3] Khonkar H E I, Sayigh A A M 1994 Renewable Energy 5 376
[4] Chaves J 2008 Introduction to Non-imaging Optics (CRC Press)
[5] Cooke D, Gleckman P, Krebs H 1990 Nature (London) 346 802
[6] Gleckman P, Gallaguer J O, Winston R 1989 Nature (London) 339 (6221) 198
[7] Chen Y T, Chong K K, Bligh T P 2001 Journal of Solar Energy 71 155
[8] Chen Y T, Lim B H, Lim C S 2006 Journal of Solar Energy Engineering 128 245
[9] Chen Y T, He Z X, 2011 Acta Phys. Sin. 60 078104 (in Chinese) [陈应天, 何祚庥 2011 60 078104]
[10] Chen Y T, Lim B H, Lim C S 2005 Journal of Solar Energy 80 268
[11] Igel E A, Hughes R L 1979 Solar Energy 22 283
[12] Ries H, Schubnell M 1990 Solar Energy Materials 21 213
[13] Chen Y T China Patent 200510200037.X [20060531]
[14] Chen Y T China Patent 201210050545.4 [2012-07-17]
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