SOLAR CONCENTRATOR FOR PHOTOVOLTAIC SYSTEMS

摘要

A solar concentrator (1) having a longitudinal axis of extension (3) and a cross-section at right angles to the longitudinal axis substantially equal for a continuum of cross-sections, and comprising a reflective system (6) and a refractive system (7), the reflective system forming an optical inlet (8) and an optical outlet (9) and comprising two semi-portions positioned specularly relative to the plane of symmetry, where the cross-section profile of the refractive system is a triangle (11) having a base (12) at the optical outlet (9) and apex (13) on the axis of symmetry (5), where the cross-section profile of each semi-portion of the reflective system comprises a segment (18) in the shape of a parabola having an axis (20) forming with the axis of symmetry an acceptance angle (θ0) greater than zero and a focus (F) on the axis of symmetry, and where the focus falls inside the triangle.

主权项

1. A solar concentrator (1) for photovoltaic systems having a plane of symmetry (2), one main extension along a longitudinal axis (3) belonging to the plane of symmetry and a cross-section at right angles to the longitudinal axis substantially equal for a continuum of right-angled cross-sections along at least a portion of the longitudinal extension of the concentrator, the cross-section of the plane of symmetry forming an axis of symmetry (5) of the right-angled cross section, the solar concentrator comprising a main reflective system (6) and a secondary refractive system (7) both extending longitudinally and having a respective profile on the right-angled cross-section, the main reflective system forming at its two opposite ends along the axis of symmetry respectively an optical inlet (8) and an optical outlet (9) and comprising two semi-portions positioned specularly relative to the plane of symmetry, where the cross-section profile of the secondary refractive system (7) is a triangle (11) having a base (12) at the cross-section of the optical outlet (9) and apex (13) on the axis of symmetry (5) between the optical inlet and outlet, where the cross-section profile of each semi-portion of the main reflective system (6) extends from a point near a respective vertex (15) to the base of the triangle up to an end point (16) on the optical inlet and comprises a segment (18) substantially in the shape of a parabola having an axis (20) forming with the axis of symmetry an acceptance angle (θ0) greater than zero and a focus (F) on the axis of symmetry, and where the focus (F) falls inside the triangle (11).