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TECHNICAL PAPERS

Flux Distribution Delivered by a Fresnel Lens Used for Concentrating Solar Energy

[+] Author and Article Information
A. Ferriere

CNRS-IMP, Centre du four solaire Félix Trombe, BP5, 66125 Odeillo, France

G. P. Rodriguez, J. A. Sobrino

ETSII-UCLM, Campus Universitario s/n, 13071 Ciudad Real, Spain

J. Sol. Energy Eng 126(1), 654-660 (Feb 12, 2004) (7 pages) doi:10.1115/1.1638783 History: Received April 01, 2002; Revised May 01, 2003; Online February 12, 2004
Copyright © 2004 by ASME
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References

Figures

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Schematic of the experimental set-up: position of the lens and definition of the reference system of coordinates.
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Distribution of the concentration factor in the plane of peak concentration (z=0, distance 757 mm from the lens): (a) 2-D distribution; (b) Cross-sections along the x- and y-axis
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Profiles of concentration factors in the planes z=0,z=−1.5 mm,z=+4 mm,z=−4 mm,z=−6 mm,z=+10 mm,z=+20 mm,z=+30 mm, and z=+42 mm.
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Spots exceeding 75% of peak concentration (the areas are expressed in mm2)
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Variation of the peak concentration factor along the optical axis
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(a) General schematic of the refraction through the lens; (b) Refraction through one individual facet
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(a) Ray tracing. The lens is represented by the r-axis, the outgoing rays concentrate on the optical axis represented by the F-axis. (b) Chromatic aberration in the region of maximum concentration. The full black horizontal lines represent the planes where the concentration was measured.

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