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AC Dielectric Strength of Mineral Oil-Based Fe 3 O 4 and Al 2 O 3 Nanofluids

Author

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  • Usama Khaled

    (Department of Electrical Engineering, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
    Department of Electrical Engineering, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt)

  • Abderrahmane Beroual

    (Ecole Centrale de Lyon, Ampere CNRS UMR 5005, University of Lyon, 36 Avenue Guy Collongue, 69134 Ecully, France)

Abstract

This paper deals with an experimental study of the influence of conductive (Fe 3 O 4 ) and insulating (Al 2 O 3 ) nanoparticles at various concentrations on the dielectric strength of transformer mineral oil. The method of preparation and characterization of these nanofluids (NFs) through the measurements of zeta potential, the real and imaginary parts of dielectric permittivity as well as the concentration and size of nanoparticles using scanning electron microscope images of nanoparticles powders and energy dispersive x-ray spectroscopy analysis are presented. Experimental findings reveal that these two types of nanoparticles materials significantly improve AC breakdown voltage and the magnitude of this enhancement depends on the nanoparticle concentration, and the size and nature (material) of nanoparticles. For a given type of nanoparticle, the effect is more marked with the smallest nanoparticles. The conductive nanoparticles offer higher enhancement of dielectric strength compared with insulating nanoparticle based nanofluids. With Fe 3 O 4 , the breakdown voltage (BDV) can exceed twice that of mineral oil and it increases by more than 76% with Al 2 O 3 . The physicochemical mechanisms implicated in this improvement are discussed.

Suggested Citation

  • Usama Khaled & Abderrahmane Beroual, 2018. "AC Dielectric Strength of Mineral Oil-Based Fe 3 O 4 and Al 2 O 3 Nanofluids," Energies, MDPI, vol. 11(12), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3505-:d:190913
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    References listed on IDEAS

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    1. M. Z. H. Makmud & H. A. Illias & C. Y. Chee & M. S. Sarjadi, 2018. "Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation," Energies, MDPI, vol. 11(2), pages 1-12, February.
    2. Saidur, R. & Leong, K.Y. & Mohammad, H.A., 2011. "A review on applications and challenges of nanofluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(3), pages 1646-1668, April.
    3. Godson, Lazarus & Raja, B. & Mohan Lal, D. & Wongwises, S., 2010. "Enhancement of heat transfer using nanofluids--An overview," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(2), pages 629-641, February.
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    Cited by:

    1. Karatas, Mehmet & Bicen, Yunus, 2022. "Nanoparticles for next-generation transformer insulating fluids: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).
    2. Nur Aqilah Mohamad & Norhafiz Azis & Jasronita Jasni & Mohd Zainal Abidin Ab Kadir & Robiah Yunus & Zaini Yaakub, 2019. "Impact of Fe 3 O 4 , CuO and Al 2 O 3 on the AC Breakdown Voltage of Palm Oil and Coconut Oil in the Presence of CTAB," Energies, MDPI, vol. 12(9), pages 1-14, April.

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