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Dielectric Insulation Characteristics of Natural Ester Fluid Modified by Colloidal Iron Oxide Ions and Silica Nanoparticles

Author

Listed:
  • Vasilios P. Charalampakos

    (Department of Electrical and Computer Engineering, University of the Peloponnese, 26334 Patras, Greece)

  • Georgios D. Peppas

    (Department of Electrical and Computer Engineering, University of Patras, 26500 Patras, Greece)

  • Eleftheria C. Pyrgioti

    (Department of Electrical and Computer Engineering, University of Patras, 26500 Patras, Greece)

  • Aristides Bakandritsos

    (Regional Centre for Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University Olomouc, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic)

  • Aikaterini D. Polykrati

    (School of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece)

  • Ioannis F. Gonos

    (School of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece)

Abstract

In this study, the dielectric characteristics of two types of natural esters modified into nanofluids are studied. The AC breakdown voltage was investigated for colloidal Fe 2 O 3 and SiO 2 nanoparticles effectively scattered in natural ester oil. The experimental results identify an increase in the breakdown voltage of the nanofluid with colloidal Fe 2 O 3 conductive nanoparticles. In contrast, the breakdown voltage was reduced by adding SiO 2 nanoparticles in the same matrix. The potential well distribution of the two different types of nanoparticles was also calculated in order for the results of the experiment to be explained. The dielectric losses of the colloidal nanofluid are compared with the matrix oil and studied at 25 °C and 100 °C in the frequency regime of 10 −1 –10 6 Hz. The experimental data and the theoretical study reveal that conductivity along with the permittivity of nanoparticles constitute a pivotal parameter in the performance of nanofluid. Specific concentrations of nanoparticles with different electrical conductivity and permittivity than those of matrix oil increase the breakdown voltage strength. Simultaneously, the addition of nanoparticles having electrical conductivity and permittivity comparable to the matrix oil results in reducing the breakdown voltage.

Suggested Citation

  • Vasilios P. Charalampakos & Georgios D. Peppas & Eleftheria C. Pyrgioti & Aristides Bakandritsos & Aikaterini D. Polykrati & Ioannis F. Gonos, 2019. "Dielectric Insulation Characteristics of Natural Ester Fluid Modified by Colloidal Iron Oxide Ions and Silica Nanoparticles," Energies, MDPI, vol. 12(17), pages 1-11, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3259-:d:260539
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    Citations

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    Cited by:

    1. Arputhasamy Joseph Amalanathan & Ramanujam Sarathi & Maciej Zdanowski, 2023. "A Critical Overview of the Impact of Nanoparticles in Ester Fluid for Power Transformers," Energies, MDPI, vol. 16(9), pages 1-24, April.
    2. Ioannis F. Gonos & Issouf Fofana, 2020. "Special Issue “Selected Papers from the 2018 IEEE International Conference on High Voltage Engineering (ICHVE 2018)”," Energies, MDPI, vol. 13(18), pages 1-5, September.
    3. Shen, Zijia & Wang, Feipeng & Wang, Zhiqing & Li, Jian, 2021. "A critical review of plant-based insulating fluids for transformer: 30-year development," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    4. Miloš Šárpataky & Juraj Kurimský & Michal Rajňák & Michal Krbal & Marek Adamčák, 2022. "Dielectric Performance of Natural- and Synthetic-Ester-Based Nanofluids with Fullerene Nanoparticles," Energies, MDPI, vol. 16(1), pages 1-15, December.
    5. Konstantinos N. Koutras & Ioannis A. Naxakis & Eleftheria C. Pyrgioti & Vasilios P. Charalampakos & Ioannis F. Gonos & Aspasia E. Antonelou & Spyros N. Yannopoulos, 2020. "The Influence of Nanoparticles’ Conductivity and Charging on Dielectric Properties of Ester Oil Based Nanofluid," Energies, MDPI, vol. 13(24), pages 1-16, December.
    6. Dominika Szcześniak & Piotr Przybylek, 2021. "Oxidation Stability of Natural Ester Modified by Means of Fullerene Nanoparticles," Energies, MDPI, vol. 14(2), pages 1-13, January.

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