A Comprehensive Physical Profile for Aqueous Dispersions of Carbon Derivatives as Solar Working Fluids
Anno: 2020
Autori: Sani E., Vallejo J.P., Mercatelli L., Martina MR., Di Rosa D., Dell’Oro A., Lugo L.
Affiliazione autori: CNR-INO National Institute of Optics, Largo E. Fermi, 6, I-50125 Firenze, Italy; Departamento de Física Aplicada, Facultade de Ciencias, Universidade de Vigo, E-36310 Vigo, Spain; Department of Energy, Systems, Territory and Constructions, University of Pisa, Engineering (D.E.S.T.eC.), Largo L. Lazzarino, I-56122 Pisa, Italy; INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy
Abstract: The application of nanofluids in direct solar absorption, heat transfer or direct solar steam generation entails carrying out a comprehensive study taking into account several physical quantities. Long-term stability, rheological, thermophysical and optical properties of dispersions must be known to assess their potential for envisaged applications. Two low-concentration nanofluids, 0.005 and 0.05 wt%, of sulfonic acid-functionalized and polycarboxylate chemically modified graphene nanoplatelets in water were considered in this work. Elemental analyses of the nanopowders and pH evaluations of the colloids were carried out. The rheological behaviour of dispersions at dierent temperatures was studied by rotational rheometry. Thermal conductivities were measured by the transient hot wire method and densities by the oscillating U-tube technique. Additionally, a brief report of the optical properties was included to provide a comprehensive physical analysis.
Giornale/Rivista: APPLIED SCIENCES-BASEL
Volume: 10 (2) Da Pagina: 528-1 A: 528-13
Parole chiavi: water nanofluid; graphene; solar energy; heat transfer; viscosity
DOI: 10.3390/app10020528Citazioni: 4dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-14Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui