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Hydraulic assessment of nanofluids based on mineral oil and natural ester in windings of power transformers

Abstract: It is common for electric power transformers to be cooled by mineral oil. However, this type of oil has begun to be replaced by oils of natural origin (esters), due to environmental and fire safety reasons. The latter are biodegradable and have an ignition point much higher than that of mineral oils. On the other hand, different authors have found that the dielectric and refrigerant properties of the oils used in transformers can be improved when some types of nanoparticles are added. In order to assess this improvement, this work presents the results obtained by a research in which different nanofluids, produced through commercial dielectric oils (mineral and natural), nanoparticles of titanium (IV) oxide and magnetite, were thermally characterized. The results of this characterization have been used to perform simulations based on computational fluid dynamics. This comparison has allowed to observe the pressure drops and the mass flows in the internal channels of the windings of a real power transformer.

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Congress: International Conference on Renewable Energies and Power Quality: ICREPQ (2018 : Salamanca)

Publisher: The European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ)

Year of publication: 2018

No. of pages: 4

Publication type: Conference object

ISSN: 2172-038X

Spanish project: DPI2015- 71219-C2 1-R

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Authorship

AGUSTIN SANTISTEBAN DIAZ

ALFREDO ORTIZ FERNANDEZ

FERNANDO DELGADO SAN ROMAN

CRISTINA FERNANDEZ DIEGO

JAIME SANZ ASENSIO

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Hydraulic assessment of nanofluids based on mineral oil and natural ester in windings of power transformers

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