Carbon nanohorns-based nanofluids as direct sunlight absorbers
Autori: Sani E., Barison S., Pagura C., Mercatelli L., Sansoni P., Fontani D., Jafrancesco D., Francini F.
Affiliazione autori: CNR – Istitutto nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze; CNR – IENI, Corso Stati Uniti, 4, 35127 Padova, Italy
Abstract: The optimization of the poor heat transfer characteristics of fluids conventionally employed in solar devices are at present one of the main topics for system efficiency and compactness. In the present work we investigated the optical and thermal properties of nanofluids consisting in aqueous suspensions of single wall carbon nanohorns. The characteristics of these nanofluids were evaluated in view of their use as sunlight absorber fluids in a solar device. The observed nanoparticle-induced differences in optical properties appeared promising, leading to a considerably higher sunlight absorption. We found that the thermal conductivity of the nanofluids was higher than pure water. Both these effects, together with the possible chemical functionalization of carbon nanohorns, make this new kind of nanofluids very interesting for increasing the overall efficiency of the sunlight exploiting device. (C) 2010 Optical Society of America
Giornale/Rivista: OPTICS EXPRESS
Volume: 18 (5) Da Pagina: 5179 A: 5187
Maggiori informazioni: The work has been performed under the \”Industria 2015\” funding of the Italian Ministry of Economic Development. The authors thank Mr. Giuseppe Tognon (CNR-ITB) for kind help with TEM analyses and Dr. Mauro Schiavon (Carbonium srl) for kindly providing the SWCNH.DOI: 10.1364/OE.18.005179Citazioni: 97dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-10-02Riferimenti 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