Comparison of Fresnel lenses and parabolic mirrors as solar energy concentrators.
This paper compares the gain that can be achieved with a one- or two-stage concentrator, when the first stage is a Fresnel lens or a parabolic mirror, as a function of the luminosity of the concentrator. The results show that the achievable gain using a parabolic mirror is greater than that obtained using a flat or roof lens but is lower than that obtained using a curved lens.
Lorenzo
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Universidad Politecnica de Madrid, Instituto de Energia Solar (ETSIT), Madrid-3, Spain.
Luque
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