NDLI: Improvement of the cooling process of oil-immersed electrical transformers using heat pipes

Content Provider	IEEE Xplore Digital Library
Author	Rosas, C. Moraga, N. Bubnovich, V. Fischer, R.
Copyright Year	1986
Abstract	A system to improve the cooling process of oil-immersed electrical transformers based on heat pipes is presented. The methodology used considers a theoretical analysis to predict the oil critical regions from the heat transfer point of view, and an experimental work to validate the theoretical predictions and to determine the effects of heat pipes installed in critical regions of the oil. The theoretical analysis of a 75-kVA electrical transformer is chosen as the physical model, whose thermal and fluid dynamic behaviors are described by a two-dimensional mathematical model. The experimental work is accomplished in a system built to simulate the heat generation due to energy losses. This unit is able to work with or without the heat pipes. Results obtained for the time evolution of the temperature distribution in the cooling fluid show a good agreement between theoretical and experimental predictions, and positive effects of the heat pipes mission.
Sponsorship	IEEE Power Engineering Society
Starting Page	1955
Ending Page	1961
Page Count	7
File Size	367353
File Format	PDF
ISSN	08858977
Volume Number	20
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cooling Transformers Resistance heating Heat transfer Petroleum Temperature Energy loss Mathematical model Thermal conductivity Fluid dynamics time-domain methods Energy losses finite volume method fluid mechanics and heat transfer simulated heating test
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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