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Open AccessArticle

Titania Nanofluids Based on Natural Ester: Cooling and Insulation Properties Assessment

Electrical and Energy Engineering Department, University of Cantabria, 39005 Santander, Cantabria, Spain
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 603; (registering DOI)
Received: 28 February 2020 / Revised: 18 March 2020 / Accepted: 23 March 2020 / Published: 26 March 2020
(This article belongs to the Section Energy and Catalysis)
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.
Keywords: cooling; experimental platform; insulation; nanofluid; transformers cooling; experimental platform; insulation; nanofluid; transformers
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MDPI and ACS Style

Olmo, C.; Méndez, C.; Ortiz, F.; Delgado, F.; Ortiz, A. Titania Nanofluids Based on Natural Ester: Cooling and Insulation Properties Assessment. Nanomaterials 2020, 10, 603.

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