Lightning impulse breakdown voltage of synthetic and natural ester liquids-based Fe3O4, Al2O3 and SiO2 nanofluids

Usama Khaled (1, 2) , Abderrahmane Beroual (3)

1 Department of Electrical Engineering, Faculty of Engineering, Aswan University
2 KSU - King Saud University [Riyadh]
3 EE - Ampère, Département Energie Electrique

This article deals with the study the negative lightning impulse breakdown voltage (LI-BDV) of MIDEL 1204 natural and MIDEL 7131 synthetic ester liquids when adding small amounts of specific nanoparticles (NPs); the considered NPs being magnetic (Fe3O4) and insulating (Al2O3 and SiO2) NPs. It is shown that these NPs enhance the LI-BDV of investigated esters. In addition, for a given type of NPs, there is an optimal concentration for which the U50% LI-BDV is the highest. This latter is enhanced by about 16.8% for natural ester with Al2O3 at a concentration of 0.05 g/L; and by about 25.6% for synthetic ester with Fe3O4 at a concentration of 0.05 g/L.

Mots clés: Lightning impulse voltage; U50% breakdown voltage; Nanofluids; Natural ester; Synthetic ester; Nanoparticles

Domaines: Energie électrique

Usama Khaled, Abderrahmane Beroual. Lightning impulse breakdown voltage of synthetic and natural ester liquids-based Fe3O4, Al2O3 and SiO2 nanofluids. Alexandria Engineering Journal, 2020, 59 (5), pp.3709-3713. ⟨10.1016/j.aej.2020.06.025⟩. ⟨hal-02967641⟩