Development and testing of high concentration flat-plate Fresnel lenses

M. Z. Shvarts; A. A. Soluyanov

doi:10.1117/12.825614

21 August 2009 Development and testing of high concentration flat-plate Fresnel lenses

M. Z. Shvarts, A. A. Soluyanov

Proceedings Volume 7423, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI; 74230G (2009) https://doi.org/10.1117/12.825614
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

In the work, stages of designing, optimizing, manufacturing and testing the circular flat-plate Fresnel lenses (FLs) for photovoltaic modules with multi-junction solar cells (SCs) are presented. A mathematical model based on ray tracing has been developed for optimizing lenses design parameters and calculating their optical-power characteristics (OPCs). In searching the optimum combination of the lens aperture, its focal distance and refracting profile parameters, the optimization criterion was the maximum of the average sunlight concentration at high optical efficiency in the focal spot of minimum size. Analysis of OPCs of circular Fresnel lenses with conical (the generatrix of surface is a straight line) and curvilinear (the generatrix of surface is a curved line) refracting surfaces has been carried out. Fresnel lens specimens were fabricated and a control of their profile parameters has been done. Experimental lens OPCs have been obtained with use of newly developed optical test bench. A degree of the effect of the light flux and Fresnel lens geometrical imperfections on validity of the experimental data interpretation has been determined. To establish the lens optical efficiency values at standard irradiance conditions, the correction of the calculation model was done. Also, the effect of temperature on the lens optical efficiency is studied.

Citation Download Citation

M. Z. Shvarts and A. A. Soluyanov "Development and testing of high concentration flat-plate Fresnel lenses", Proc. SPIE 7423, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI, 74230G (21 August 2009); https://doi.org/10.1117/12.825614

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