Elliptical-Shaped Fresnel Lens Design through Gaussian Source Distribution

A novel three-dimensional elliptical-shaped Fresnel lens (ESFL) analytical model is presented to evaluate and maximize the solar energy concentration of Fresnel-lens-based concentrators. AutoCAD, Zemax Ansys software were used for ESFL design, performance evaluation temperature calculation, respectively. Contrary previous modeling processes, based on edge-ray principle with an acceptance half-angle ±0.27° as key defining parameter, present uses, instead, a Gaussian distribution define source in Zemax. The results validated through numerical analysis published experimental data from flat lens. An in-depth study influence several factors, such focal length, arch height aspect ratio, its output carried out. Moreover, function number/size grooves also analyzed. Compared typical 1–16 per millimeter reported literature, this mathematical parametric allowed substantial reduction grooves/mm 0.3–0.4, which may enable easy mass production ESFL. concentrated optimal configuration was then compared that best configuration, under same focusing conditions. Due elliptical shape lens, chromatic aberration effect largely reduced, resulting higher flux temperature. Over 2360 K 1360 maximum temperatures found lenses, respectively, demonstrating great potential curved-shaped renewable applications require high concentrations fluxes temperatures.