Improved design of a three-dimensional, static concentrator lens using meteorological data

✍ Scribed by K. Yoshioka; S. Goma; K. Kurokawa; T. Saitoh

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 217 KB
• Volume: 7
• Category: Article
• ISSN: 1062-7995
• DOI: 10.1002/(sici)1099-159x(199901/02)7:1<61::aid-pip242>3.0.co;2-f

✦ Synopsis

A three-dimensional, rectangular concentrator lens (3D lens) has been designed by combining two kinds of two-dimensional compound elliptic lenses and meteorological data. Optical concentration ratios of the 3D lenses designed at various halfacceptance angles are calculated and measured as a function of light incidence angle. Yearly integrated irradiance and yearly averaged module eciency are simulated using the calculated optical concentration ratios and meteorological data. A performance index Ð a product of entry aperture and cell occupation ratios Ð is de®ned to compare with that of ¯at-plate modules. Consequently, designed half-acceptance angles are optimized at 408 and 708 in north±south and east±west directions. The occupation area of solar cells can be reduced to 62% using this lens although module area increases to only 1 . 16 times that of the ¯at-plate module.