Design and development of a laminated Fresnel lens for point-focus PV systems. Phase II

When installing concentrator photovoltaic (CPV) systems in desert areas, we must consider the impact of sandstorms on the Fresnel lens in CPV modules. CPV systems are much more sensitive to sandstorms than flat-panel PV systems because they can only use the direct beam component of sunlight. In this study, the transmittance of a PMMA substrate after sandblasting was evaluated and the influence of sandblasting on the output of a CPV system was assessed. The transmittance of PMMA decreased with an increase in the momentum of blown sand. The conversion efficiency of a CPV module was determined by equivalent circuit calculation. The conversion efficiency decreased with increasing momentum. The coefficient of degradation was 0.17 point per unit momentum.

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Design and Development of Dome-Shaped Fresnel Lens

IEEE Journal of Photovoltaics ◽

10.1109/jphotov.2016.2576681 ◽

2016 ◽

Vol 6 (5) ◽

pp. 1339-1344 ◽

Cited By ~ 5

Author(s):

Kenji Araki ◽

Hirokazu Nagai ◽

Kan-Hua Lee ◽

Kazuma Ikeda ◽

Masafumi Yamaguchi

Keyword(s):

Fresnel Lens ◽

Design And Development

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Large Scale Spectral Splitting Concentrator Photovoltaic System Based on Double Flat Waveguides

Energies ◽

10.3390/en13092360 ◽

2020 ◽

Vol 13 (9) ◽

pp. 2360

Author(s):

Ngoc Hai Vu ◽

Thanh Tuan Pham ◽

Seoyong Shin

Keyword(s):

Solar Cell ◽

Conversion Efficiency ◽

Large Scale ◽

Fresnel Lens ◽

Simulation Software ◽

Photovoltaic System ◽

Total System ◽

Pv Systems ◽

Junction Solar Cell ◽

Spectral Splitting

In this research, we present a novel design for a large scale spectral splitting concentrator photovoltaic system based on double flat waveguides. The sunlight concentrator consists of a Fresnel lens array and double waveguides. Sunlight is firstly concentrated by Fresnel lenses then reaches an upper flat waveguide (UFW). The dichroic mirror-coated prisms are positioned at each focused area to divide the sunlight spectrum into two bands. The mid-energy (mid E) band is reflected at the prism surface and coupled to the UFW. The GaInP/GaAs dual-junction solar cell is attached at the exit port of the UFW to maximize the electrical conversion efficiency of the mid E band. The low-energy (low E) band is transmitted and reaches a bottom flat waveguide (BFW). The mirror coated prisms are utilized to redirect the mid E band sunlight for coupling with the BFW. The GaInAsP/GaInAs dual-junction solar cell is applied to convert the low E band to electricity. The system was modeled using the commercial optic simulation software LightTools™. The results show that the proposed system can achieve optical efficiencies of 84.02% and 80.01% for the mid E band and low E band, respectively, and a 46.1% electrical conversion efficiency for the total system. The simulation of the system performance and comparison with other PV systems prove that our proposed design is a new approach for a highly efficient photovoltaic system.

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Achromatic Fresnel Lens with Improved Efficiency for PV Systems

International Journal of Photoenergy ◽

10.1155/2014/787392 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9

Author(s):

Mario González Montes ◽

Juan Carlos Martínez-Antón ◽

Daniel Vázquez Moliní ◽

Antonio Álvarez Fernandez-Balbuena ◽

E. Bernabeu

Keyword(s):

Parametric Design ◽

Incidence Angle ◽

Chromatic Dispersion ◽

Fresnel Lens ◽

Pv Systems ◽

Operating Region ◽

Fresnel Lenses ◽

Achromatic Lens ◽

Efficiency Rate ◽

Concentration Ratios

This work is aimed to design and evaluate different achromatic Fresnel lens solutions capable of operating as concentrators aimed at photovoltaic cells systems. Throughout this study, the theoretical parametric design of the achromatic lens will be shown together with a series of simulations to verify the performance of each lens topology. The results will be compared with a standard Fresnel lens to ascertain the validity and effectiveness of the obtained design. Finally, a novel kind of hybrid lens is proposed, which combines the advantages of each type of lens (standard and Fresnel) according to the optimal operating region of each design. Efficiency and concentration ratios of each particular lens are shown, regarding lens dimension, light’s incidence angle, or wavelength. Through this innovative achromatic design concentration ratios above 1000 suns, which hardly reach standard Fresnel lenses. Furthermore chromatic dispersion is minimized and the efficiency rate is over 85% of efficiency for a wide spectral range (from 350 nm to 1100 nm).

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