Journal
ENERGY
Volume 245, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2022.123289
Keywords
29 December 2021; Lighting; heating splitting; Silver nanorods; Nanocomposites; Luminous transmittance
Categories
Funding
- National Natural Science Foundation of China [52178071]
- Zhongyu Design Institute Co., Ltd.
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Metallic nanoparticles, such as silver nanorods, with localized surface plasmon resonance can efficiently absorb solar energy in a specific range. This study investigated the optical properties of silver nanorods using the Discrete Dipole Approximation (DDA) approach and studied the spectral response of silver nanorod/polymer nanocomposites using a Monte Carlo method. Optimal hybridizations of silver nanorods were proposed to achieve high luminous transmittance and thermal radiation insulation. The findings suggest that decreasing the diameter of silver nanorods can improve radiation shielding performance and luminous transmittance, while insignificant changes occur when the diameter decreases further. The proposed silver nanorod/polymer nanocomposites show promise in achieving light/heat splitting with high luminous transmittance and solar radiation blocking.
Metallic nanoparticles exhibit localized surface plasmon resonance, which gifts them with enhanced solar energy absorption in a special band. With an adjustable plasma resonance band from the visible light to the infrared, silver nanorods (AgNRs) are potential candidates for energy saving application. In this research, the optical properties of AgNRs were investigated by the Discrete Dipole Approximation (DDA) approach, and the spectral response of AgNR/PMMA nanocomposites were studied by a Monte Carlo method. Meanwhile, the ideal window for high luminous transmittance and high thermal radiation insulation was identified, and then eight hybridizations of AgNRs were proposed to match the ideal window. Based on these eight hybridizations, related performance comparisons were conducted. The cases study shows that when the diameter of AgNRs decreases from 30 to 10 nm, both the radiation shielding performance and luminous transmittance can be improved. While as the diameter of AgNRs decreases from 10 to 5 nm, there are insignificant changes in radiation shielding performance or luminous transmittance. The optimal AgNR/PMMA nanocomposites proposed in this study were demonstrated to be positive solutions for light/heat splitting, as they can ensure higher luminous transmittance than 50%, while blocked the solar radiation by about 80%.
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