An evaluative observation on impact of optical properties of nanofluids in performance of photo-thermal concentrating systems. (December 2018)

• Record Type: Journal Article
• Authors: Verma, Sujit Kumar; Tiwari, Arun Kumar; Tripathi, Mukesh
• Is Part Of: Solar energy. Volume 176(2018)
• Page Start: 709
• Page End: 724
• Publication Date: 2018-12
• Subjects: Plasmonic nanofluids -- Optical property -- Extinction coefficient -- Absorption band -- Energy efficiency; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2018.10.084
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: Optical properties of nanofluids are function of size and morphology of nanoparticles. Hybrid nanomaterials can acts as optical filter. Photo-thermal conversion efficiency is function of particle concentration. Core-shell nanomaterials are future scope for selective splitting of spectra. Abstract: Present crisp and brief review is specifically focused on mechanism and role of optical properties of nano material in enhancement of absorptance or extinction coefficients from solar spectrum. By proper selection of size and shape along with optimum concentration, optimum absorptance can be achieved. This systematic study provides valuable information about various key nanomaterials and base fluids which are more specific in band splitting of spectrum, tunable to size, shape and particle volume concentration on optical properties. Based on simulation model and experimental observations performed by researchers, it is inferred that optical properties of nanofluids are function of type of material, size and shape. Base fluids also have influence on optical absorptance but it is a constant variable. By appropriate selection, morphological design of particle, efficient and suitable environment (design aspect of system) desired spectral absorptance and selective filtering can be achieved.