Comparison of Fresnel lenses and parabolic mirrors as solar energy concentrators
E. Lorenzo, A. Ĺuque
Abstract
E. Lorenzo, A. Ĺuque
Abstract
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.
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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.
Key concepts: Optics, Parabolic reflector, Fresnel lens, Nonimaging optics, Concentrator, Lens (geology), Physics, Fresnel number