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Design of Fresnel lens with spherical facets for concentrated solar power applications
Author(s) -
Awasthi Kuldeep,
Reddy Desireddy Shashidhar,
Khan Mohd. Kaleem
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4947
Subject(s) - optics , focal length , fresnel lens , spherical aberration , fresnel zone antenna , lens (geology) , fresnel zone , fresnel number , ray tracing (physics) , radius , geometrical optics , zone plate , aperture (computer memory) , parabolic reflector , simple lens , curved mirror , physics , computer science , diffraction , telecommunications , smart antenna , computer security , dipole antenna , antenna (radio) , acoustics
Summary In this paper, a ray‐tracing model is developed using MATLAB based on mathematical formulations used in the design of Fresnel lens with spherical facets. Further, a design chart for Fresnel lens with spherical facets is developed to determine aperture radius and design angle for a given focal length and focus size. Concentration ratio and spherical aberration for Fresnel lens with spherical facets are also compared with those of plano‐convex lens and conventional Fresnel lens with triangular facets. Furthermore, the present mathematical model is validated with SolTrace model and with the experimental study conducted on a prototype of Fresnel lens with spherical facets fabricated using CO 2 laser cutting machine. Focal length for the proposed Fresnel lens with spherical facets is found to be the same. However, concentration ratio computed from the present ray‐tracing model is in fair agreement with SolTrace model and experimental data with percentage deviations at focal length 5.4% and 12.4%, respectively.