Breakdown in Nanofluids: A Short Review on Experimental Results and Related Mechanisms

Abstract

Nanofluids seem to gradualy become an alternative to traditional insulating liquids, such as transformer oil. In this paper, a short review of experimental results as well as of possible breakdown mechanisms and of some of the factors affecting the breakdown strength of the said fluids is conducted. Most of the reports suggest that the addition of nanoparticles in insulating liquids improves the breakdown strength. However, some reports that contradict the above are also to be found. In view of this, an outline of future research is discussed. This review does not encompass all possible effects, parameters and factors affecting nanofluids but it is solely concerned with breakdown strength.

A Short Review of Some of the Factors Affecting the Breakdown Strength of Insulating Oil for Power Transformers

“…There is an optimum value of capacitance which, by delivering the right amount of energy into the electrode gap, may improve this process by destroying the most prominent irregularities on the electrode surfaces [25,71]. Regarding some future work, it would be of great interest if the role of bubbles and/or foreign particles could be studied in relation to nanofluids since the latter show some promise for replacement of the more traditional liquids [72,73]. The so-called velocity effect is also a promising field of work w.r.t.…”

Development of insulation oil based on Palm Oil Mill Effluent with nano silica

“…It shows that POMEbased insulation oil has the potential to be applied to transformers in Indonesia. Adding nano silica to plant-based insulation oil increased the breakdown voltage [21]. The higher the breakdown voltage, the better the quality of the insulation oil.…”

“…It is necessary to do a test with a capability lowest limit below 0.01% Vol. However, based on theory, the addition of nano silica would reduce the water content since nano silica binds water in the oil [21]. The percentage of nano silica concentration in water content is shown in Figure 4.…”

Alternative Fluids – with a Particular Emphasis on Vegetable Oils – as Replacements of Transformer Oil: A Concise Review

“…The aim of the present paper is to give a concise review of some alternatives to transformer oil and comment on their various aspects. It is evident that in the context of the present review there will be no mention of nanofluids [19,20]. It must be emphasized that the present short review does not by any means include all possible alternative fluids to transformer oil since only vegetable oils are particularly mentioned and discussed.…”