Title :
An optimum design and properties of a static concentrator with a nonimaging lens
Author :
Yoshioka, K. ; Kobayashi, M. ; Suzuki, A. ; Endoh, K. ; Ohe, N. ; Saitoh, T.
Author_Institution :
Tokyo A&T Univ., Japan
Abstract :
An optimum design of a lens-type static concentrator was carried out using a ray-tracing program. The optimum concentrator was determined by calculation of annual integrated power for several different concentrators and also flat-plate ones. Using average sunlight data for ten years, a maximum average output ratio of the concentrator to the flat-plate modules at the same cell area condition was 1.7 at a half-acceptance angle of 25°. Also, the best half-acceptance angle, was calculated to be 25° by taking account of the shadowing effect. In experiments under a solar simulator, if was shown that the best half-acceptance angle was obtained at 25°. This suggests that an occupied area of costly crystalline Si cells in the static concentrator can be reduced to 60%
Keywords :
lenses; optimisation; ray tracing; solar energy concentrators; Si; annual integrated power; crystalline Si cells; flat-plate concentrators; half-acceptance angle; nonimaging lens; optimum design; ray-tracing program; shadowing effect; static solar concentrator; Apertures; Costs; Crystallization; Design methodology; Lenses; Optical design; Photovoltaic cells; Power systems; Ray tracing; Shadow mapping;
Conference_Titel :
Photovoltaic Energy Conversion, 1994., Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference - 1994, 1994 IEEE First World Conference on
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1460-3
DOI :
10.1109/WCPEC.1994.520158
