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Titania nanofluids based on natural ester: cooling and insulation properties assessment

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.

 Autoría: Olmo C., Méndez C., Ortiz F., Delgado F., Ortiz A.,

 Fuente: Nanomaterials, 2020, 10(4), 603

 Editorial: MDPI

 Fecha de publicación: 26/03/2020

 Nº de páginas: 14

 Tipo de publicación: Artículo de Revista

 DOI: 10.3390/nano10040603

 ISSN: 2079-4991

 Proyecto español: DPI2015-71219-C2 1-R

 Proyecto europeo: info:eu-repo/grantAgreement/EC/H2020/823969/EU/Raising knowledge and developing technology for the design and deployment of high-performance power transformers immersed in biodegradable fluids"BIOTRAFO"/BIOTRAFO/