Titania nanofluids based on natural ester: cooling and insulation properties assessment
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Olmo Salas, Cristian; Méndez Gutiérrez, Cristina; Ortiz Fernández, Félix; Delgado San Román, Fernando; Ortiz Fernández, AlfredoFecha
2020-03-26Derechos
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.
Publicado en
Nanomaterials, 2020, 10(4), 603
Editorial
MDPI
Palabras clave
Cooling
Experimental platform
Insulation
Nanofluid
Transformers
Resumen/Abstract
The assessment of a TiO2 vegetal-based dielectric nanofluid has been carried out, and its characteristics and behavior have been tested and compared with a previously tested maghemite nanofluid. The results obtained reflect a similar affectation of the main properties, with a maximal improvement of the breakdown voltage of 33% at 0.5 kg/m3, keeping the thermal conductivity and the viscosity almost constant, especially the first one. This thermal characterization agrees with the results obtained when applying the TiO2 optimal nanofluid in the cooling of an experimental setup, with a slightly worse performance than the base fluid. Nevertheless, this performance is the opposite to that noticed with the ferrofluid, which was capable of improving the cooling of the transformer and decreasing its temperature. The similarities between the characterizations of both nanofluids, the differences in their cooling performances and their different magnetic natures seem to point out the presence of additional thermomagnetic buoyancy forces to support the improvement of the cooling.
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