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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 5179–5187

Carbon nanohorns-based nanofluids as direct sunlight absorbers

E. Sani, S. Barison, C. Pagura, L. Mercatelli, P. Sansoni, D. Fontani, D. Jafrancesco, and F. Francini  »View Author Affiliations


Optics Express, Vol. 18, Issue 5, pp. 5179-5187 (2010)
http://dx.doi.org/10.1364/OE.18.005179


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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.

© 2010 OSA

OCIS Codes
(160.4760) Materials : Optical properties
(220.1770) Optical design and fabrication : Concentrators
(350.6050) Other areas of optics : Solar energy
(160.4236) Materials : Nanomaterials

ToC Category:
Solar Energy

History
Original Manuscript: December 15, 2009
Revised Manuscript: February 8, 2010
Manuscript Accepted: February 10, 2010
Published: February 25, 2010

Virtual Issues
Focus Issue: Solar Concentrators (2010) Optics Express

Citation
E. Sani, S. Barison, C. Pagura, L. Mercatelli, P. Sansoni, D. Fontani, D. Jafrancesco, and F. Francini, "Carbon nanohorns-based nanofluids as direct sunlight absorbers," Opt. Express 18, 5179-5187 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-5-5179


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