Effect of streaming potential on heat transfer in transformer oil

Author

Jayaram, S.

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

3

Issue

3

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

410

Lastpage

416

Abstract

The results of an experimental study of the effects of streaming electrification on the heat transfer of transformer oil (Voltesso 35) in Plexiglas and paper/pressboard pipe models are reported. The magnitude and the polarity of the charge in the oil entering the test section was varied by using two different filters (Millipore cellulose and Sartorius fiber glass) in the upstream of the oil flow. An enhancement in heat transfer was observed with both types of filters in the Plexiglas model and with cellulose filter in the paper/pressboard model; whereas a reduction in heat transfer was observed with fiber glass filter in paper/pressboard model under similar flow rates and temperatures. With uncharged oil, heat transfer was either inhibited or no enhancement was noticed in both models. The results have been discussed considering the temperature gradients, the flow conditions and the electrical forces due to static charge in the liquid

Keywords

flow; heat transfer; static electrification; transformer oil; Millipore cellulose filter; Plexiglas model; Sartorius fiber glass filter; Voltesso 35; electrical forces; flow; heat transfer; paper/pressboard pipe model; static charge; streaming electrification; streaming potential; temperature gradient; transformer oil; Dielectric liquids; Dielectrophoresis; Filters; Heat transfer; Lubricating oils; Oil insulation; Petroleum; Power transformer insulation; Resistance heating; Space charge;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.506214

Filename

506214