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3 results on '"naturel ester oil"'

1. Statistical Analysis of AC Dielectric Strength of Natural Ester-Based ZnO Nanofluids

Author

Hidir Duzkaya and Abderrahmane Beroual

Subjects
naturel ester oil, nanofluids, zinc oxide, AC breakdown voltage, Weibull distribution, normal distribution, Technology
Abstract

Due to environmental concerns and increased energy demand, natural esters are among the alternatives to mineral oils in transformers. This study examines the electrical behavior of natural ester-based ZnO nanofluids at different concentrations in the range of 0.05–0.4 g/L. AC breakdown voltages are measured in a horizontally positioned sphere–sphere electrode system according to IEC 60156 specifications. The measurement data are analyzed using Weibull and normal distribution functions. Breakdown voltages with 1%, 10% and 50% probability are also estimated, these probabilities being of great interest for the design of power electrical components. Experimental results show that AC breakdown voltage increases with the concentration of ZnO nanoparticles, except for the concentration of 0.05 and 0.4 g/L of ZnO. Moreover, breakdown voltages at 1% and 10% probability increase by 22.7% and 13.2% when adding 0.1 g/L ZnO to natural ester, respectively.

Published
2020
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2. High Voltage Insulating Materials-Current State and Prospects.

Author

Rozga, Pawel, Beroual, Abderrahmane, and Rozga, Pawel

Subjects
Technology: general issues, 3-point bending test, AC breakdown voltage, DC high voltage, ECT, Weibull distribution, activation energy, ageing effect, aramid paper, arc lamps, arc welding, cellulose, cellulose-aramid paper, composite insulator, deformation, dielectric liquid mixtures, dielectric materials, dielectric polarization, discrete Fourier transform, drying, electric arc, electrical discharges, electromagnetic radiation, energy distribution, frequency response analysis (FRA), gas insulation, glass-reinforced epoxy core, harmonic distortion, insulating liquids, insulation aging, insulation diagnostics, insulation liquid mixtures, insulation system, interpolation, liquid insulation, mathematical modeling, mechanical strength, micro-hardness, mineral oil, moisture, moisture insulation, n/a, nanofluids, natural ester, naturel ester oil, non-uniform electric field, normal distribution, numerical index, oil-paper insulation, optical method, optical radiation, partial discharge, power transformer, power transformer insulation testing, power transformers, relaxation methods, retrofilling, retrofilling of power transformers, rotating disc system, spectrophotometer, streaming electrification, synthetic ester, synthetic esters, thermal conductivity, transformer, transformer winding, transformers, window width, zinc oxide
Abstract

Summary: Studies on new solutions in the field of high-voltage insulating materials are presented in this book. Most of these works concern liquid insulation, especially biodegradable ester fluids; however, in a few cases, gaseous and solid insulation are also considered. Both fundamental research as well as research related to industrial applications are described. In addition, experimental techniques aimed at possibly finding new ways of analysing the experimental data are proposed to test dielectrics.

3. Statistical Analysis Of Ac Dielectric Strength Of Natural Ester-Based Zno Nanofluids

Author

Duzkaya, Hidir, Beroual, Abderrahmane, Ampère, Département Energie Electrique (EE), Ampère (AMPERE), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
normal distribution, [SPI]Engineering Sciences [physics], nanofluids, lcsh:T, [SPI.NRJ]Engineering Sciences [physics]/Electric power, zinc oxide, Weibull distribution, AC breakdown voltage, naturel ester oil, lcsh:Technology
Abstract

Due to environmental concerns and increased energy demand, natural esters are among the alternatives to mineral oils in transformers. This study examines the electrical behavior of natural ester-based ZnO nanofluids at different concentrations in the range of 0.05&ndash, 0.4 g/L. AC breakdown voltages are measured in a horizontally positioned sphere&ndash, sphere electrode system according to IEC 60156 specifications. The measurement data are analyzed using Weibull and normal distribution functions. Breakdown voltages with 1%, 10% and 50% probability are also estimated, these probabilities being of great interest for the design of power electrical components. Experimental results show that AC breakdown voltage increases with the concentration of ZnO nanoparticles, except for the concentration of 0.05 and 0.4 g/L of ZnO. Moreover, breakdown voltages at 1% and 10% probability increase by 22.7% and 13.2% when adding 0.1 g/L ZnO to natural ester, respectively.

Published
2021

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