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Title: Thermophysical properties of ethylene glycol mixture based CNT nanofluids
Title of periodic: Journal of Physics: Conference Series
Authors: Camarano, Denise das Mercês
Mansur, F.A.
Araújo, T.L.C.F.
Salles, G.C.
Santos, Adelina Pinheiro
Affiliation: Centro de Desenvolvimento de Tecnologia Nuclear, CDTN, Belo Horizonte, MG, Brasil
Issue Date: 2016
Keywords: Carbon nanotubes;Ethylene;Heat transfer
Abstract: Nanofluids are produced by dispersing nanometer-scale solid particles into base liquids such as water, ethylene glycol, etc. The thermal quadrupole method is utilized to determine the thermophysical properties of materials. By this technique, the thermal diffusivity and conductivity of different nanofluids containing the surfactants humic acid, sodium salt of humic acid and sodium carboxymethyl cellulose and multi-wall carbon nanotubes were evaluated at room temperature and at 75 °C. Values of thermal diffusivity varying in the range from 9.60x10-8 m2s-1 to 1.46x10-7 m2s-1 and thermal conductivity from 0.26 Wm-1K-1 to 41 Wm-1K-1 were obtained. As main conclusions, it was noted that nanofluids exhibit superior heat transfer characteristics than the conventional heat transfer fluid and the thermal conductivity is enhanced by 50% for the nanofluid containing 0.0275 mg/mL of sodium salt of humic acid + ethylene glycol, at the temperature of 25 °C.
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Appears in Collections:Artigo de periódico

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