Preparation of a vegetable oil-based nanofluid and investigation of its breakdown and dielectric properties


Investigations throughout the last decade have shown that conductive nanoparticles can be dispersed in transformer oils to make nanofluids. Well-dispersed nanoparticles are capable of increasing the breakdown voltage of the oil beneath power frequency and lightning impulses. They also increase the inception voltages for partial discharge [1]. With increasing moisture content, reduction of the breakdown voltage of the nanofluid at power frequency is significantly smaller than that in the corresponding transformer oil [one]. The electrical and thermal properties of 4 varieties of nanofluid, prepared by dispersing Al2O3, Fe3O4, SiO2, and SiC nanoparticles in transformer oils, were described in [a pair of]. It's also been reported that the thermal conductivity of such oil was enhanced by eightpercent when aluminum nitride nanoparticles were dispersed in it at a loading of zero.5p.c by weight, and its cooling capability was improved by concerning twentyp.c [three]. An electrodynamic model has been developed describing streamer formation in transformer oil-primarily based nanofluids, which presents generation, recombination, and transport equations for every charge carrier kind [4]. Vegetable insulation oils are primarily based on natural ester oils, which are environmentally friendly and hearth resistant [4]?????????[9]. At the moment, little is known regarding the preparation of nanofluids using natural ester oils and their dielectric, breakdown, and aging properties. Surface modification of nanoparticles is a terribly effective procedure to avoid nanoparticle agglomeration in insulating nanofluids [10]?????????[14]. However, the surface modification procedures used for mineral oils can't be applied to vegetable oils as a result of of their very totally different molecular structures. We tend to so investigated new approaches to the preparation of vegetable oil-based mostly nanofluids. This paper presents some of the results of a study of the breakdown voltages and dielectric properties of a vegetable oil-primarily based nanofluid. The nanofluid was prepared by dispersing Fe- O4 nanoparticles during a vegetable insulation oil obtained from a laboratory at Chongqing University. Oleic acid was used for surface modification of the nanoparticles.

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