Abstract
The quest for green alternative insulating oil in high-voltage equipment has been the desire of researchers for over decades. Vegetable oil has been considered as alternative insulating oil; this oil contains two different fatty acids, saturated and unsaturated. However, this fatty acid contains two opposing properties. In this work, physicochemical and dielectric properties of methyl ester from neem, yellow oleander and palm kernel oil were measured. The pour point of palm kernel oil methyl ester and the mixture of palm kernel oil methyl ester with yellow oleander methyl ester were obtained to be -9 °C and -2°, respectively. The viscosity of mineral oil is 9.5 mPas, that of palm kernel oil methyl ester, and mixture of palm kernel oil methyl ester and yellow oleander oil methyl ester were obtained to be 4.14 mPas and 4.38 mPas, respectively. A good dielectric loss relatively close to the dielectric loss of mineral oil was obtained for the mixture of palm kernel ester and yellow oleander ester. The mixture of the three methyl esters has the highest dielectric breakdown result of 26 kV better than the breakdown result of mineral oil. However, the optimization of all the parameters reveals that the mixture of palm kernel ester and yellow oleander ester has the desired property that can serve as an alternative for mineral insulating oil. Also, aging of the samples confirmed that mixture of palm kernel methyl ester and yellow oleander methyl ester has the potential to replace mineral oil.
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Funding
This work was supported by Nigeria’s Tertiary Education Trust Fund (TETFund) National Research Fund (NRF) Research Grant 2019. TETF/DR&D/CE/NRF/UNI/ZARIA/STI/55/VOL.1
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S.O. Oparanti contributed to conceptualization, investigation, formal analysis, writing—original draft, and writing—review and editing. Andrew Adewunmi Adekunle performed investigation, formal analysis, and writing—original draft. Victoria Ene Oteikwu performed formal analysis and writing—original draft. Abdulsalam Ismaila Galadima was involved in supervision, project administration, and writing—review and editing. Abdelghaffar Amoka Abdelmalik contributed to funding acquisition, supervision, project administration, and writing—review and editing.
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Oparanti, S.O., Adekunle, A.A., Oteikwu, V.E. et al. An experimental investigation on composite methyl ester as a solution to environmental threat caused by mineral oil in transformer insulation. Biomass Conv. Bioref. (2022). https://doi.org/10.1007/s13399-022-03286-3
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DOI: https://doi.org/10.1007/s13399-022-03286-3