Breakdown Behaviour of New Bio-degradable Dielectric Coolants under 50Hz AC for Different Electrode Configurations

Champa, V.; Nagashree, A.N.; Sumangala, B. V.; Nagabhushana, G.R.

doi:10.1016/j.matpr.2018.01.114

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…The examined vegetable oils exhibited a significant potential for oxidation. Tert-butyl hydroquinone (TBHQ), an antioxidant, was added to the ethyl ester and epoxy ethyl ester to lessen oxidation, improving the oxidation stability of bio transformer oils [13,14]. In contrast to direct vegetable oils or aged vegetable oils used as fuels in some adapted diesel engines, biotransformer oil is a refined fuel that is easily used in diesel-engine vehicles.…”

Section: Introductionmentioning

confidence: 99%

Physico-Chemical and Electrical Properties of Epoxy Ethyl Esters of Various Vegetable Oils As Bio-Transformer Oils

mandour,

Kahalfallah,

Taha

et al. 2023

Egypt. J. Chem.

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Chemically modified vegetable oils are biodegradable and eco-friendly particularly in comparison to petroleum transformer lubricant and insulating oils. These advantages motivate us to investigate the use of soybean, sunflower and cook waste. vegetable oils as suitable transformer oil alternatives. It is crucial to compare its physicochemical and electrical properties to those of transformer mineral oil to the American Standard Technical Methods (ASTM) specification to confirm its appropriateness. In This Study soybean, sunflower and cook waste oils undergo a two-step chemical modification by transesterification reaction with ethyl alcohol and potassium hydroxide as catalyst at 60 ᵒ C followed by epoxidation reaction with hydrogen peroxide and glacial acetic acid in amberlite IR -120 resins. The physiochemical and electrical properties of synthesized bio-transformer oils were examined without the presence of tert-butyl hydroquinone (TBHQ) as antioxidant and after applying oxidation conditions with the addition of TBHQ using approved methods. The chemical parameters that are measured include acid value, water content and oxidation stability. The physical characteristics that were tested were density, dynamic viscosity at 40 °C and flash point, breakdown voltage is the electrical property that was measured. Most of the data showed that the different characteristics properties of the ethyl ester of various vegetable oils meet the standard ASTM values after the addition of 2 grams of TBHQ antioxidant. Epoxidation of ethyl vegetable oil an improvement in the physicochemical and electrical properties occurred with and without TBHQ antioxidant, Consequently, it can be used as a substitute for traditional transformer oil because it complies with most ASTM standard requirements.

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Section: Introductionmentioning

confidence: 99%

Physico-Chemical and Electrical Properties of Epoxy Ethyl Esters of Various Vegetable Oils As Bio-Transformer Oils

mandour,

Kahalfallah,

Taha

et al. 2023

Egypt. J. Chem.

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“…Natural esters (NEs) obtained from renewable sources such as vegetable oils have 95-100% greater biodegradability than mineral oils (MO), which are only 30% biodegrad-able [4]. In addition to being consumed as food, vegetable oils have been used as biodiesel since 2011 in Malaysia, with a 5% vegetable oil composition in diesel [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Rice Husk Filler on the Structural and Dielectric Properties of Palm Oil as an Electrical Insulation Material

et al. 2021

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This study uses natural fibre, which is moisture absorbent, as an innovative and economical filler for insulating oil. Rice husk (RH) is a natural fibre known to have water-absorbing properties and used as a supplementary cementitious material. This research utilises the water-absorbing properties of RH to improve the physicochemical and dielectric properties of insulating oil. RH was refined into a fine powder at a diameter of less than 63 µm. Palm oil (PO) was synthesised with RH at concentrations of 0 g/L, 0.01 g/L, and 0.1 g/L. The moisture-absorbent properties of RH were analysed by using Fourier-transform infrared (FTIR) spectroscopy. The particle size and distribution of RH in PO were also obtained using a scanning electron microscope (SEM) and a Zeta particle analyser. The breakdown voltage (BDV) strength of PO with RH was measured according to IEC 60156, and the dielectric frequency response was investigated in the range of 102–105 Hz. RH is proven to absorb moisture from PO, as the O–H band intensity at the 3350 cm−1 is increased from the experimental results. Therefore, the mean BDV and dielectric insulation properties of PO dispersed with RH also increased accordingly.

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“…Hence, investigating the dielectric properties of HFE and FK is both relevant and timely. Specifically, relative permittivity [11, 12], AC dissipation factor [11], DC conductivity [13] and breakdown strength [14–16] are the four key parameters that are used to evaluate coolant dielectric properties. A previous study has reported the temperature effect on AC spectroscopy and DC conductivity [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the dielectric properties of hydrofluoroethers and fluorinated ketone

Chippendale

Lewin

et al. 2019

IET Science, Measurement & Technology

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Breakdown Behaviour of New Bio-degradable Dielectric Coolants under 50Hz AC for Different Electrode Configurations

Cited by 6 publications

References 7 publications

Physico-Chemical and Electrical Properties of Epoxy Ethyl Esters of Various Vegetable Oils As Bio-Transformer Oils

Physico-Chemical and Electrical Properties of Epoxy Ethyl Esters of Various Vegetable Oils As Bio-Transformer Oils

Effect of Rice Husk Filler on the Structural and Dielectric Properties of Palm Oil as an Electrical Insulation Material

Effect of temperature on the dielectric properties of hydrofluoroethers and fluorinated ketone

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