title: Comparison of Fresnel lenses and parabolic mirrors as solar energy concentrators.
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.
authors.affiliation: Universidad Politecnica de Madrid, Instituto de Energia Solar (ETSIT), Madrid-3, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Lorenzo
authors.forename: A
authors.initials: A
authors.lastname: Luque