Title :
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
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;
Conference_Titel :
Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-1942-7
DOI :
10.1109/ELINSL.1994.401398
