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Analysis of non-noble plasmonic enhanced solar distillation using computed optical activities.

Analysis of non-noble plasmonic enhanced solar distillation using computed optical activities.

Authors :
Gupta, Ambesh
T.R., Adithyan
Kalpathy, Sreeram K.
Thomas, Tiju
Source :
Desalination. Nov2022, Vol. 541, pN.PAG-N.PAG. 1p.
Publication Year :
2022

Abstract

Solar distillation is an immensely promising, renewable energy-based solution route for potable water production from grey water. Noble plasmonic nanoparticles (e.g., Au, Ag) are typically employed in solar distillation systems for efficiency enhancement. However, their high cost renders such technologies economically nonviable. In this study, we evaluate the prospect of using Cu-coated Al as non-noble plasmonic nanoparticles for solar distillation based on the energy balance across various parts of a solar still (basin, glass cover and fluid). We compute the absorption and scattering cross-sections of these nanoparticles, and hence their optical activity. We show that particles of sizes <60 nm have greater absorption cross-section as compared to scattering cross-section in the ultraviolent (200 to 360 nm) and visible light spectrum (360 to 700 nm). The effects of nanoparticle concentration (0.004 % to 0.024 % of sizes 10–22 nm) in the nanofluid on the yield of distillate, energy efficiency and temperature of the fluid are analyzed. We report that Al-Cu nanoparticles enhance energy efficiency of a conventional solar still by as much as 64 % at a concentration of 0.012 %. The efficiency increases with increasing nanoparticle concentration and begins to saturate after 0.012 % concentration. • First study on use of Al-Cu non noble plasmonic nanoparticles for solar distillation • Beyond 60 nm particle size, (when radius ratio ~ 0.8), absorption efficiencies decrease. • Particles smaller than 25 nm show enhanced absorption as compared to scattering properties. • Efficiency enhances by 64 % with increase in volume concentration up to 0.012 % and thereafter saturates. • 14 nm sized nanoparticles at 0.012 vol% increase the temperature by 11 % as compared to conventional solar still. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00119164
Volume :
541
Database :
Academic Search Index
Journal :
Desalination
Publication Type :
Academic Journal
Accession number :
158744292
Full Text :
https://doi.org/10.1016/j.desal.2022.115999