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首页> 外文期刊>Journal of Heat Transfer >Tungsten Nanowire Metamaterials as Selective Solar Thermal Absorbers by Excitation of Magnetic Polaritons
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Tungsten Nanowire Metamaterials as Selective Solar Thermal Absorbers by Excitation of Magnetic Polaritons

机译：钨纳米线超材料通过磁极化子激发作为选择性太阳能吸热剂

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摘要

The present study focuses on nanowire-based metamaterials selective solar absorbers. Finite-difference time-domain (FDTD) simulation is employed for numerically designing a broadband solar absorber made of lossy tungsten nanowires which exhibit spectral selectivity due to the excitation of magnetic polariton (MP). An inductor-capacitor circuit model of the nanowire array is developed in order to predict the resonance wavelengths of the MP harmonic modes. The effects of geometric parameters such as nanowire diameter, height, and array period are investigated and understood by the sweep of geometric parameters, which tunes the MP resonance and the resulting optical and radiative properties. In addition, the optical properties and conversion efficiency of this nanowire-based absorber are both demonstrated to be insensitive on incidence angles, which illustrates the potential applicability of the proposed nanowire-based meta-material as a high-efficiency wide-angle selective solar absorber. The results show that the nanowire-based selective solar absorber with base geometric parameters can reach 83.6% of conversion efficiency with low independence of incident angle. The results will facilitate the design of novel low-cost and high-efficiency materials for enhancing solar thermal energy harvesting and conversion.
机译：本研究集中于基于纳米线的超材料选择性太阳能吸收剂。有限差分时域（FDTD）仿真用于数值设计由有损钨纳米线制成的宽带太阳能吸收器，该吸收剂由于磁极化（MP）的激发而表现出光谱选择性。为了预测MP谐波模式的谐振波长，开发了纳米线阵列的电感器-电容器电路模型。通过扫描几何参数来研究和了解诸如纳米线直径，高度和阵列周期之类的几何参数的影响，该参数可调节MP共振以及由此产生的光学和辐射特性。另外，该纳米线基吸收体的光学性质和转换效率均被证明对入射角不敏感，这说明了所提出的纳米线基超材料作为高效广角选择性太阳能吸收体的潜在适用性。 。结果表明，具有基本几何参数的基于纳米线的选择性太阳能吸收剂可以达到转换效率的83.6％，且入射角的依赖性较低。结果将有助于设计新颖的低成本和高效材料，以增强太阳能热能的收集和转化。

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  • 来源
    《Journal of Heat Transfer》 |2017年第5期|052401.1-052401.8|共8页
  • 作者

    Liping Wang; Jui-Yung Chang; Hao Wang;

  • 作者单位

    School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ 85287;

    School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ 85287;

    School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ 85287;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanowires; metamaterial; solar absorber; magnetic polariton;

    机译：纳米线;超材料;太阳能吸收器;磁极化;

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