Results 221 to 230 of about 6,861 (260)

Bioremediation of insulating oils

IEE Colloquium Insulating Liquids, 1999
Bioremediation is the process whereby naturally occurring micro-organisms are used to digest chemicals into harmless products such as carbon dioxide, water and microbial biomass. A wide range of chemicals can be degraded in this way including oils and greases.
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Environmentally friendly insulating oil

IEE Colloquium on Engineering and the Environment-how it affects you!, 1999
Due to environmental problems with PCBs, silicone oil and esters were developed as environmentally-friendly insulating oils. Today, mineral insulating oil is still being used because it offers the best compromise between cost and performance and also because of its compatibility with other materials used in the construction of power transformers. Other
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Internally insulated hot-oil pipelines

Applied Energy, 1983
Abstract Heavy-fuel oil is usually heated to facilitate its conveyance through pipelines. This paper presents the theoretical reasoning behind the prediction of the optimal thickness of insulant necessary for such a pipeline, so that the least energy running cost can be achieved.
S.D. Probert, C.Y. Chu
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Oil stresses in impregnated-paper insulation

Electrical Engineering, 1945
RECENT EXPERIMENT on fully impregnated cable-type paper insulation, has shown that under certain conditions use of a paper of low density results in a higher dielectric strength than does the use of a paper of higher density.1 It has also been shown that failure of such insulation usually begins in the oil channels between successive turns of paper ...
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A SYMPOSIUM ON INSULATING OILS

Scientific Lubrication, 1958
A SYMPOSIUM ON INSULATING OILS was presented to The Institute of Petroleum on March 5th, under the Chairmanship of P. W. L. Gossling, whose introductory remarks took the form of a short review of the subject and the papers. Papers presented were as follows :—
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New electrical insulating mineral oils

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1976, 1976
Since World War I, electrical insulating oils for transformers and allied electrical equipment have been refined from naphthenic petroleum crude oil stocks. The resulting oils show little or no wax formation and have acceptable dielectric, mechanical and heat transfer properties at temperatures down to −40°C.
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Stability of Electrical-Insulating Oils

IEEE Transactions on Electrical Insulation, 1970
Knowing that oil is a weak link in a composite or impregnated dielectric system with reference to both dielectric strength and ease of contamination, many investigators have devoted great efforts to try to ascertain the best types of oil for various operating conditions.
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Dielectric loss of insulating oil

Journal of the Institution of Electrical Engineers, 1953
Considerable discrepancies between the results of different laboratories when measuring the dielectric loss of the same insulating oils has been reported in co-operative tests for C.I.G.R.E., Second Series, 1949-50. These can arise either from contamination of the oil sample with impurities or from the instability of the oil.
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Decomposition Gases of Insulating Oil in Oil-impregnated Paper Insulation System with an Oil Gap

IEEJ Transactions on Fundamentals and Materials, 2021
Yuta Makino, Takashi Kurihara, Toshihiro Takahashi, Muneaki Kurimoto, Takeyoshi Kato   +4 more
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A new type of nano APTES-hBN modified palm oil as natural ester insulating oil with upgraded thermal aging characteristics

Renewable Energy, 2022
Chao Tang
exaly