title: Optical design of two-axes parabolic trough collector and two-section Fresnel lens for line-to-spot solar concentration.
abstract: Solar tracking concentrators are optical systems that collect the solar energy flux either in a line or spot using reflective or refractive surfaces. The main problem with these surfaces is their manufacturing complexity, especially at large scales. In this paper, a line-to-spot solar tracking concentrator is proposed. Its configuration allows for a low-cost solar concentrator system. It consists of a parabolic trough collector (PTC) and a two-section PMMA Fresnel lens (FL), both mounted on a two-axis solar tracker. The function of the PTC is to reflect the incoming solar radiation toward a line. Then, the FL, which is placed near the focus, transforms this line into a spot by refraction. It was found that the system can achieve a concentration ratio of 100x and concentrate an average solar irradiance of 518.857W/m2with an average transmittance of 0.855, taking into account the effect of the chromatic aberration.
authors.forename: Carlos
authors.initials: C
authors.lastname: Ramírez
authors.forename: Noel
authors.initials: N
authors.lastname: León
authors.forename: Héctor
authors.initials: H
authors.lastname: García
authors.forename: Humberto
authors.initials: H
authors.lastname: Aguayo