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Silicon Nanowires for Solar Thermal Energy Harvesting: an Experimental Evaluation on the Trade-off Effects of the Spectral Optical Properties.

Sekone AK, Chen YB, Lu MC, Chen WK, Liu CA, Lee MT - Nanoscale Res Lett (2016)

Bottom Line: The significantly reduced spectral reflectivity of silicon nanowire to visible light makes it even more attractive in solar energy applications.A drying experiment and a theoretical calculation were carried out to directly evaluate the effects of the trade-off between scattering properties at different wavelengths.The results showed that a 17.8 % increase in the harvest and utilization of solar thermal energy could be achieved using a silicon nanowire array on silicon substrate as compared to that obtained with a plain silicon wafer.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan, Republic of China.

ABSTRACT
Silicon nanowire possesses great potential as the material for renewable energy harvesting and conversion. The significantly reduced spectral reflectivity of silicon nanowire to visible light makes it even more attractive in solar energy applications. However, the benefit of its use for solar thermal energy harvesting remains to be investigated and has so far not been clearly reported. The purpose of this study is to provide practical information and insight into the performance of silicon nanowires in solar thermal energy conversion systems. Spectral hemispherical reflectivity and transmissivity of the black silicon nanowire array on silicon wafer substrate were measured. It was observed that the reflectivity is lower in the visible range but higher in the infrared range compared to the plain silicon wafer. A drying experiment and a theoretical calculation were carried out to directly evaluate the effects of the trade-off between scattering properties at different wavelengths. It is clearly seen that silicon nanowires can improve the solar thermal energy harnessing. The results showed that a 17.8 % increase in the harvest and utilization of solar thermal energy could be achieved using a silicon nanowire array on silicon substrate as compared to that obtained with a plain silicon wafer.

No MeSH data available.


Related in: MedlinePlus

Variation of the dimensionless average moisture content in the SiC plate with respect to drying time. a Complete drying curve. b Drying curves for silicon and silicon nanowire cases between 100 and 200 min
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Fig4: Variation of the dimensionless average moisture content in the SiC plate with respect to drying time. a Complete drying curve. b Drying curves for silicon and silicon nanowire cases between 100 and 200 min

Mentions: Figure 4a shows the results for the changes in the average dimensionless moisture content of the plate (ϕavg) during the drying process which can be defined asFig. 4


Silicon Nanowires for Solar Thermal Energy Harvesting: an Experimental Evaluation on the Trade-off Effects of the Spectral Optical Properties.

Sekone AK, Chen YB, Lu MC, Chen WK, Liu CA, Lee MT - Nanoscale Res Lett (2016)

Variation of the dimensionless average moisture content in the SiC plate with respect to drying time. a Complete drying curve. b Drying curves for silicon and silicon nanowire cases between 100 and 200 min
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4816388&req=5

Fig4: Variation of the dimensionless average moisture content in the SiC plate with respect to drying time. a Complete drying curve. b Drying curves for silicon and silicon nanowire cases between 100 and 200 min
Mentions: Figure 4a shows the results for the changes in the average dimensionless moisture content of the plate (ϕavg) during the drying process which can be defined asFig. 4

Bottom Line: The significantly reduced spectral reflectivity of silicon nanowire to visible light makes it even more attractive in solar energy applications.A drying experiment and a theoretical calculation were carried out to directly evaluate the effects of the trade-off between scattering properties at different wavelengths.The results showed that a 17.8 % increase in the harvest and utilization of solar thermal energy could be achieved using a silicon nanowire array on silicon substrate as compared to that obtained with a plain silicon wafer.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan, Republic of China.

ABSTRACT
Silicon nanowire possesses great potential as the material for renewable energy harvesting and conversion. The significantly reduced spectral reflectivity of silicon nanowire to visible light makes it even more attractive in solar energy applications. However, the benefit of its use for solar thermal energy harvesting remains to be investigated and has so far not been clearly reported. The purpose of this study is to provide practical information and insight into the performance of silicon nanowires in solar thermal energy conversion systems. Spectral hemispherical reflectivity and transmissivity of the black silicon nanowire array on silicon wafer substrate were measured. It was observed that the reflectivity is lower in the visible range but higher in the infrared range compared to the plain silicon wafer. A drying experiment and a theoretical calculation were carried out to directly evaluate the effects of the trade-off between scattering properties at different wavelengths. It is clearly seen that silicon nanowires can improve the solar thermal energy harnessing. The results showed that a 17.8 % increase in the harvest and utilization of solar thermal energy could be achieved using a silicon nanowire array on silicon substrate as compared to that obtained with a plain silicon wafer.

No MeSH data available.


Related in: MedlinePlus