Article
Engineering, Electrical & Electronic
Anu Kumar Das, Dayal Ch. Shill, Saibal Chatterjee
Summary: This paper investigates the electrical breakdown performance of coconut oil and finds that RBD coconut oil performs well as a substitute for natural ester. Experimental results show that the viscosity and resistivity of RBD coconut oil remain stable during aging, and its breakdown strength does not significantly decrease under thermal aging conditions.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Chemistry, Physical
Binghao Chen, Jiahui Yang, Hexing Li, Ziming Su, Rui Chen, Chao Tang
Summary: This study investigates the application prospects of bio-based sustainable natural ester as an electrical equipment insulation, focusing on the use of nanotechnology for improving its electrical and physical and chemical properties. The results show that the KH550 surface modified nano-TiO2 has a superior effect on improving the electrical properties of the insulating oil compared to nano-TiO2. The amino and silicon hydroxyl groups on the surface of KH550-TiO2 carry strong positive electrostatic potential, which enhances the dispersion of KH550-TiO2 in natural esters.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Ed Casserly, Juan Acosta, Andy Holden, Brad Greaves, Tom Prevost
Summary: The thermal index of thermally upgraded Kraft paper was determined using IEEE Standard C57.100 Annex A.4.2 for five mineral insulating liquids and two natural esters, and compared with the values in IEEE Standard C57.91.
IEEE ELECTRICAL INSULATION MAGAZINE
(2022)
Article
Multidisciplinary Sciences
Jean Lambert Jiosseu, Asse Jean-Bernard, Ghislain Mengata Mengounou, Adolphe Moukengue Imano, Emeric Tchamdjio Nkouetcha
Summary: This article presents a comparative study on the physicochemical and electrical properties of monoesters of castor oil and their counterparts based on FeO3 and Z(n)O nanoparticles. Results are compared with those of triesters and the IEEE C 57.14 standard. Statistical analysis indicates an increase in viscosity and acid number for both FeO3 and Z(n)O samples. Fire point shows an increment for FeO3 samples, while a regression is observed for Z(n)O samples. Breakdown voltage and partial discharge inception voltage show improvements with FeO3 samples.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Mechanical
Sunil Jayantha Hettiarachchi, Suela Kellici, Matthew Kershaw, James Bowen
Summary: This study investigated the potential of coconut oil (CCO) as a lubricant and formulated different blends with additives to enhance its physicochemical characteristics. The results showed that blending CCO with additives effectively improved its suitability and thermal stability, offering new possibilities for environmentally friendly and renewable lubricants.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Green & Sustainable Science & Technology
Jinshan Qin, Xiao Peng, Qinpan Qiu, Chao Tang
Summary: This paper investigates the mechanism of improving the properties of natural ester insulating oil by modifying it with nano hexagonal boron nitride grafted with silane coupling agent (APTES-hBN). Experimental results show that the addition of Nano APTES-hBN inhibits acid production and reduces the number of polar molecules in the oil. Mechanism study reveals that the addition of Nano APTES-hBN enhances the interfacial bonding between oil and paper insulation, and has strong adsorption capacity.
Article
Materials Science, Composites
Mohammad Jawaid, Sameer A. Awad, Mohammad Asim, Hassan Fouad, Othman Y. Alothman, Carlo Santulli
Summary: In this study, OPF and PALF reinforced biophenolic resin composites and hybrid composites were fabricated and analyzed for their structural, thermal, and mechanical properties. Results showed that the hybrid composites exhibited better properties compared to pure composites, with improved tensile, flexural, and thermal stability. The reinforcement of pure and hybrid composites into the matrix also enhanced storage and loss moduli, with significant improvements observed in the pure composite samples. Additionally, the damping factor was significantly reduced by the reinforcement of hybrid composites. This study suggests that the obtained hybrid composites are suitable for various structural and nonstructural applications.
POLYMER COMPOSITES
(2021)
Article
Multidisciplinary Sciences
Yan Li, Min Li, Jun Xie
Summary: This study established an experimental platform for measuring dielectric loss tan delta and PD for oil-pressboard insulation, investigating the correlation between dielectric loss and PD, providing insights into degradation of oil-pressboard insulation, and eliminating information asymmetry.
Article
Energy & Fuels
Pawel Zukowski, Przemyslaw Rogalski, Tomasz N. Koltunowicz, Konrad Kierczynski, Marek Zenker, Alexander D. Pogrebnjak, Matej Kucera
Summary: This study investigated the conductivity and permittivity of electrical pressboard-insulating liquid-water composites and compared them to water. The presence of water increased the permeability of the composites below 100 Hz, and the conductivity of the composites exponentially increased with increasing water content. The activation energy of the composites' DC conductivity was higher than that of liquid water, and the dielectric relaxation times of the composites were significantly longer than those of water.
Review
Engineering, Electrical & Electronic
A. A. Adekunle, S. O. Oparanti
Summary: Faults in high voltage equipment have significant economic impact on power utilities and users. Mineral oil has been widely used as insulation in oil filled power equipment, but there is a growing demand for an alternative due to increased energy demand and environmental factors. The use of vegetable oil as an alternative insulation oil faces challenges. However, the addition of natural methyl ester nanoparticles has mitigated these obstacles by forming nanofluids.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Pawel Rozga, Filip Stuchala, Bartlomiej Pasternak, Malgorzata Binek
Summary: This article presents the results of a study on the development of negative streamers in synthetic ester and mineral oil using an electrode system with a pressboard barrier. The results showed that the pressboard barrier prevents breakdown and reduces the propagation velocity of streamers in synthetic ester, which is important for evaluating the dielectric properties of alternative liquids.
JOURNAL OF ELECTROSTATICS
(2023)
Article
Engineering, Electrical & Electronic
Arputhasamy J. Amalanathan, Nilesh J. Vasa, Noureddine Harid, Huw Griffiths, Ramanujam Sarathi
Summary: This study investigates the thermal ageing of ester fluid-impregnated pressboard material using OES and LIBS techniques, and explores classification options. Optimal energy levels for classification algorithm were determined through LIBS analysis, and were found to be correlated with plasma temperature and other parameters.
Article
Geosciences, Multidisciplinary
Aizimaiti Maimaiti, Qi Wang, Fang Hao, Xianzhang Yang, Haizu Zhang, Jinqiang Tian
Summary: This study conducted experiments on the thermal stability of liquid hydrocarbons in carbonate reservoirs through gold-tube experiments. The results showed that temperature and inorganic minerals play important roles in oil cracking. Dolomite and calcite were found to inhibit the generation of methane and increase the thermal stability of crude oil. The presence of carbonate minerals is significant in analyzing the potential of gas generation, the evolution of carbon isotope composition, and the prediction of hydrocarbon phase behavior during crude oil cracking.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Food Science & Technology
Yingying Wu, Linlin Wang, Xiuzhen Ding, Wentao Wang, Luping Zhao
Summary: In this study, high internal phase emulsions (HIPEs) were successfully prepared using pumpkin seed oil bodies (PSOBs) as the base, with different oil phase percentages resulting in different droplet shapes and gel-like properties. Higher oil phase percentages led to better viscoelasticity and storage modulus, but worse thermal stability.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Faiznur Mohd Fuad, Masrina Mohd Nadzir
Summary: Eleven types of natural deep eutectic solvents (NADES) were synthesized using different hydrogen bond donors and acceptors. The synthesized NADESs showed stable liquid states and appropriate physicochemical properties. These findings are important for a better understanding and application of deep eutectic solvents.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
