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Proceedings of Symposium on Energy Engineering in the 21<sup>st</sup> Century (SEE2000) Volume I-IV

ISSN:
1-56700-132-7 (Print)

DEVELOPMENTS AND DESIGNS OF SOLAR ENGINEERING FRESNEL LENSES

Ralf Leutz
Tokyo University of Agriculture and Technology, Department of Mechanical Systems Engineering 2-24-16 Naka-cho, Koganei-shi, Tokyo 184-8588, Japan

Atsushi Akisawa
Graduate School of Bio-Applications and Systems Engineering (BASE), Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei-shi, Tokyo 184-8588, Japan

Takao Kashiwagi
Department of Mechanical System Engineering,Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei 184-8588, Japan

Akio Suzuki
UNESCO Bouvin 3.26 SC/EST, 1, rue Miollis, 75732 Paris Cedex 15, France

Abstract

This paper deals with the suitability of Fresnel lenses of imaging and nonimaging designs for solar energy concentration. The paper's scope is the review of long known, and recently developed Fresnel lenses, and the analyses of their characteristics for utilization as solar concentrators, putting an emphasis on a lens designed by the authors. Nonimaging optics are presented as offering the possibilities needed for a breakthrough of Fresnel lenses in commercial solar energy concentration, both in photovoltaic and thermal power conversion.