Measurement of Tan-delta and DC Resistivity of Synthetic Ester Based Oil Filled with Fe2O3, TiO2 and Al2O3 Nanoparticles

Khan, Suhaib Ahmad; Khan, Asfar Ali; Tariq, Mohd

doi:10.1080/23080477.2021.1920130

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…In addition, apart from analyzing the effect of nanoparticles on the thermophysical properties of insulating liquids, the effect of temperature has also been examined by plotting the variation of thermal conductivity and viscosity of pure ester oils as well as nanofluids against temperature. Natural ester oil is basically a vegetable oil produced from rapeseed, and synthetic ester is obtained by the treatment of alcohol with carboxylic acids to give a robust fluid [21]. The most commonly used method-called the two-step method-used to prepare nanofluid is a widely recognized method due to its low cost and better compatibility with oils [22].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Thermophysical Performance of Ester-Based Nanofluids for Enhanced Insulation Cooling in Transformers

et al. 2022

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Nanotechnology provides an effective way to upgrade the thermophysical characteristics of dielectric oils and creates optimal transformer design. The properties of insulation materials have a significant effect on the optimal transformer design. Ester-based nanofluids (NF) are introduced as an energy-efficient alternative to conventional mineral oils, prepared by dispersing nanoparticles in the base oil. This study presents the effect of nanoparticles on the thermophysical properties of pure natural ester (NE) and synthetic ester (SE) oils with temperature varied from ambient temperature up to 80 °C. A range of concentrations of graphene oxide (GO) and TiO2 nanoparticles were used in the study to upgrade the thermophysical properties of ester-based oils. The experiments for thermal conductivity and viscosity were performed using a TC-4 apparatus that follows Debby’s concept and a redwood viscometer apparatus that follows the ASTM-D445 experimental standard, respectively. The experimental results show that nanoparticles have a positive effect on the thermal conductivity and viscosity of oils which reduces with an increase in temperature.

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Section: Introductionmentioning

confidence: 99%

Assessment of Thermophysical Performance of Ester-Based Nanofluids for Enhanced Insulation Cooling in Transformers

et al. 2022

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“…The ability to forecast the capability and condition of insulating material relies heavily on resistivity [22]. Temperature and the concentration of nanoparticles cause nonlinear variations in resistivity.…”

Section: Resistivitymentioning

confidence: 99%

“…The dielectric dissipation factor evaluates the losses in insulation caused by the presence of voids, contaminants, or solid particles when an AC electric field is applied to the dielectric fluid [15]. A low tanδ suggests that the power losses associated with insulation are minimal and give better dielectric strength to the oil [22]. Its high value, on the other hand, denotes the presence of soluble impurities and contaminants.…”

Section: Dielectric Dissipation Factor (Tanδ)mentioning

confidence: 99%

An Experimental Study and Statistical Analysis on the Electrical Properties of Synthetic Ester-Based Nanofluids

et al. 2022

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The rise in power demand today necessitates its generation and transmission at high voltages. The efficient transmission of electric power requires transformers with an insulation system that exhibits excellent dielectric properties. In this paper ZnO and CuO nanomaterials are utilized to investigate the dielectric characteristics of pure synthetic ester oil and its related nanofluids (NFs) from room temperature up to 60 °C at increments of 20 °C, including AC breakdown voltage, Dielectric Dissipation factor, and DC resistivity. The breakdown testing is carried out in accordance with experimental IEC-60156 requirements. The DC resistivity and dissipation factor of oils are measured using the Dissipation Factor meter, resistivity meter, and a heating chamber with an oil cell that follows IEC 60247 standard. The statistical analysis is performed on the breakdown voltages test values using the Weibull probability distribution model for better accuracy. From the results, it has been found that ZnO nanofluid possesses a higher breakdown voltage among all the tested liquids. Furthermore CuO nanofluid gives a minimum value of dissipation factor even at higher temperatures.

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“…Tremendous performances shown in the past by transformer oil as an insulant in electrical equipment have made it perfect insulation. But in the recent past [14], there is a need to develop such an insulating fluid that can perform its functionalities effectively when it is exposed to unpleasant weather conditions because the performance of a power transformer is affected when it is exposed to different weather conditions [15,16]. The comparison of the existing literatures on the dielectric behaviour of transformer oil with the proposed work is discussed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Influence of Area and Volume Effect on Dielectric Behaviour of the Mineral Oil-Based Nanofluids

et al. 2022

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Transformer oil is conventionally used as an insulating liquid for the purpose of insulation and cooling in power transformers. The rise in the power demand has put stress on the existing insulation system used for power transmission. Nanotechnology provides an advanced approach to upgrade the conventional insulation system by producing nano-oil with enhanced dielectric characteristics. The aim of the study is to present the influence of area volume effect on the dielectric performance of mineral oil and its nanofluids. In this paper, nanofluids are prepared by dispersing two different concentrations of SiO2 nanoparticles in base transformer oil using a two-step method. The effect of area and volume is investigated on nanofluids in the laboratory using coaxial electrode configurations under different test conditions. The AC breakdown voltage and maximum electric stress is determined for the pure oil and nanofluids. The results show that the addition of SiO2 nanoparticles significantly improves the dielectric characteristics of transformer oil. Moreover, the breakdown phenomenon is also discussed to analyze the effect of nanoparticle, stressed area, and stressed volume on the dielectric strength of insulating oil. Nanofluids could be an alternative to mineral oil.

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Measurement of Tan-delta and DC Resistivity of Synthetic Ester Based Oil Filled with Fe₂O₃, TiO₂ and Al₂O₃ Nanoparticles

Cited by 8 publications

References 16 publications

Assessment of Thermophysical Performance of Ester-Based Nanofluids for Enhanced Insulation Cooling in Transformers

Assessment of Thermophysical Performance of Ester-Based Nanofluids for Enhanced Insulation Cooling in Transformers

An Experimental Study and Statistical Analysis on the Electrical Properties of Synthetic Ester-Based Nanofluids

Influence of Area and Volume Effect on Dielectric Behaviour of the Mineral Oil-Based Nanofluids

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