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Open AccessArticle

Effect of TiO2 and ZnO Nanoparticles on the Performance of Dielectric Nanofluids Based on Vegetable Esters During Their Aging

1
Department of Electrical and Energy Engineering, Faculty of Industrial and Telecommunications Engineering, University of Cantabria, 39005 Santander, Spain
2
Department of Applied Physics, Science Faculty, University of Cantabria, IDIVAL, 39005 Santander, Spain
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 692; https://doi.org/10.3390/nano10040692
Received: 11 March 2020 / Revised: 3 April 2020 / Accepted: 3 April 2020 / Published: 6 April 2020
(This article belongs to the Section Energy and Catalysis)
Over the last few decades the insulating performance of transformer oils has been broadly studied under the point of view of nanotechnology, which tries to improve the insulating and heat dissipation performance of transformer oils by suspending nanoparticles. Many authors have analyzed the thermal and dielectric behavior of vegetable oil based-nanofluids, however, very few works have studied the evolution of these liquids during thermal aging and their stability. In this paper has been evaluated the performance of aged vegetable oil based-nanofluids, which have been subjected to accelerated thermal aging at 150 °C. Nanoparticles of TiO2 and ZnO have been dispersed in a commercial natural ester. Breakdown voltage, resistivity, dissipation factor and acidity of nanofluid samples have been measured according to standard methods, as well as stability. Moreover, it has been analyzed the degradation of Kraft paper through the degree of polymerization (DP). The results have showed that although nanoparticles improve breakdown voltage, they increase the ageing of insulation liquids and dielectric paper. View Full-Text
Keywords: natural ester; TiOsub>2; ZnO; thermal aging; nanofluid; breakdown voltage natural ester; TiOsub>2; ZnO; thermal aging; nanofluid; breakdown voltage
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MDPI and ACS Style

Fernández, I.; Valiente, R.; Ortiz, F.; Renedo, C.J.; Ortiz, A. Effect of TiO2 and ZnO Nanoparticles on the Performance of Dielectric Nanofluids Based on Vegetable Esters During Their Aging. Nanomaterials 2020, 10, 692.

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