AC breakdown voltage and viscosity of mineral oil based SiO2 nanofluids

Author

Jin, H. ; Andritsch, T. ; Morshuis, P.H.F. ; Smit, J.J.

Author_Institution

Delft Univ. of Technol., Delft, Netherlands

fYear

2012

fDate

14-17 Oct. 2012

Firstpage

902

Lastpage

905

Abstract

A nanofluid is a fluid containing nano-sized materials. It exhibits more efficient heat transfer abilities compared to the host fluid. However the precise effect on the electrical properties of the host fluid is still uncertain. The purpose of the present study is to analyze the AC breakdown strength and viscosity of mineral oil based SiO₂ nanofluids. The host fluid used in this paper is Shell Diala S3ZXIG. This type of mineral oil is widely used in HV transformers and in the power supplies of X-ray systems. The size of the SiO₂ nanoparticles is ranging between 10 and 20 nm. The mass fractions of the investigated nanofluids are between 0.005% and 0.02%. The influence of nanoparticle concentration and moisture content on the breakdown strength is studied. The AC breakdown test results are analyzed with Weibull statistical distributions. Viscosity is an important physical property of mineral oil, which has an effect on both the electrical and the thermal performance of mineral oil. Viscosity tests were performed with a rheology meter.

Keywords

Weibull distribution; heat transfer; insulating oils; nanoparticles; power supplies to apparatus; power transformers; silicon compounds; viscosity; AC breakdown strength; AC breakdown test; AC breakdown voltage; HV transformers; Shell Diala S3ZXIG; Weibull statistical distributions; X-ray systems; electrical performance; fluid-containing nano-sized materials; heat transfer abilities; mass fractions; mineral oil-based silicon dioxide nanofluid viscosity; moisture content; nanoparticle concentration; power supplies; rheology meter; thermal performance; viscosity tests; Electric breakdown; Humidity; Minerals; Nanofluidics; Nanoparticles; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2012 Annual Report Conference on

Conference_Location

Montreal, QC

ISSN

0084-9162

Print_ISBN

978-1-4673-1253-0

Electronic_ISBN

0084-9162

Type

conf

DOI

10.1109/CEIDP.2012.6378927

Filename

6378927