非球状形貌粒子Au-H_(2)O纳米流体光谱分频 光伏/光热系统性能研究

Spectral Frequency Division of Au-H_(2)O Nanofluid Particles with Non-spherical Morphology Research on Photovoltaic/photothermal System Performance

基于表面等离激元效应的纳米流体光谱分频器具有良好的选择性光谱吸收性能,已显示出巨大潜力,然而现有纳米流体分频装置在光热窗口仍存在透射率较高的问题.为了提高光热窗口纳米流体的光谱吸收能力,文中提出了一种非球状形貌粒子的金-水纳米流体分频系统.通过时域有限差分方法(FDTD)对该分频系统进行数值计算与分析,结果表明:正六面体Au纳米流体具有最高的系统总输出功率,较球形、正三棱柱形Au纳米流体分别提高4.7%和11.1%.非球状粒子能够有效提高纳米流体光热窗口吸收能力,正六面体与正三棱柱Au纳米流体在0.3μm~0.7μm波段吸收率较球形粒子纳米流体分别提高了17.10%和22.59%.

Nanofluid frequency dividers based on surface iso-exciton effect have good selective spectral absorption performance and have shown great potential.However,existing nanofluid frequency dividers still have high transmittance in the photothermal window.In order to improve the spectral absorption capacity of photothermal window nanofluids,a gold-water nanofluid frequency division system with non-spherical morphology particles was proposed.The finite difference time domain(FDTD)method is used to numerically calculate and analyze the frequency division system.The results show that the total output power of the system is the highest for the regular hexahedron Au nanofluid,which is 4.7%and 11.1%higher than that for the spherical and regular triangular prism Au nanofluid.Non-spherical particles can effectively improve the photothermal window absorption capacity of nanofluids,and the absorption rates of regular hexahedron and regular triprism Au nanofluids in the band of 0.3~0.7μm are 17.10%and 22.59%higher than that of spherical particle nanofluids.