The Influence of Nanoparticles’ Conductivity and Charging on Dielectric Properties of Ester Oil Based Nanofluid

Konstantinos N. Koutras, Ioannis A. Naxakis, Eleftheria C. Pyrgioti, Vasilios P. Charalampakos, Ioannis F. Gonos, Aspasia E. Antonelou and Spyros N. Yannopoulos
Additional contact information
Konstantinos N. Koutras: High Voltage Laboratory, Department of Electrical & Computer Engineering, University of Patras, 26500 Patras, Greece
Ioannis A. Naxakis: High Voltage Laboratory, Department of Electrical & Computer Engineering, University of Patras, 26500 Patras, Greece
Eleftheria C. Pyrgioti: High Voltage Laboratory, Department of Electrical & Computer Engineering, University of Patras, 26500 Patras, Greece
Vasilios P. Charalampakos: Department of Electrical & Computer Engineering, University of the Peloponnese, 26334 Patras, Greece
Ioannis F. Gonos: School of Electrical & Computer Engineering, National Technical University of Athens, 15780 Athens, Greece
Aspasia E. Antonelou: Foundation for Research and Technology Hellas, Institute of Chemical Engineering Sciences, 26504 Patras, Greece
Spyros N. Yannopoulos: Foundation for Research and Technology Hellas, Institute of Chemical Engineering Sciences, 26504 Patras, Greece

Energies, 2020, vol. 13, issue 24, 1-16

Abstract: This study addresses the effect of nanoparticles’ conductivity and surface charge on the dielectric performance of insulating nanofluids. Dispersions of alumina and silicon carbide nanoparticles of similar size (~50 nm) and concentration (0.004% w / w ) were prepared in natural ester oil. The stability of the dispersions was explored by dynamic light scattering. AC, positive and negative lightning impulse breakdown voltage, as well as partial discharge inception voltage of the nanofluid samples were measured and compared with the respective properties of the base oil. The obtained results indicate that the addition of SiC nanoparticles can lead to an increase in AC breakdown voltage and also enhance the resistance of the liquid to the appearance of partial discharge. On the other hand, the induction of positive charge from the Al 2 O 3 nanoparticles could be the main factor leading to an improved positive Lightning Impulse Breakdown Voltage and worse performance at negative polarity.

Keywords: nanofluid; conductivity; alumina nanoparticles; silicon carbide; AC breakdown; lightning impulse breakdown; partial discharge (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/24/6540/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/24/6540/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:24:p:6540-:d:460401

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().