Heat transfer of transformer oil in Plexiglas pipe and paper-pressboard annular duct models

Author

Jayaram, S. ; Wu, H.

Author_Institution

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

fYear

1994

fDate

5-8 Jun 1994

Firstpage

541

Lastpage

545

Abstract

The results of an experimental study of the effects of streaming electrification on the heat transfer of transformer oil in annular duct models are reported. The polarity of the charge in the oil entering the test section was controlled using different filters in the upstream of the oil flow. A reduction in heat transfer was observed when negatively charged oil passed over paper/press board surface; whereas an enhancement in heat transfer was observed with positively charged oil under similar conditions. With uncharged oil, heat transfer was either inhibited or no enhancement was noticed

Keywords

heat transfer; organic insulating materials; paper; pipe flow; plastics; static electrification; transformer oil; Plexiglas pipe; annular duct models; charge polarity; filters; heat transfer; oil flow; paper-pressboard surface; streaming electrification; transformer oil; Dielectric liquids; Ducts; Electrostriction; Heat transfer; Oil insulation; Petroleum; Power transformer insulation; Space charge; Space heating; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on

Conference_Location

Pittsburgh, PA

ISSN

1089-084X

Print_ISBN

0-7803-1942-7

Type

conf

DOI

10.1109/ELINSL.1994.401398

Filename

401398