Relevant bibliographies by topics / Vegetable insulating fluid

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Academic literature on the topic 'Vegetable insulating fluid'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Vegetable insulating fluid"

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Lingvay, Iosif, Ion Patru, Livia Carmen Ungureanu, Valerica Stanoi, and Adriana Mariana Bors. "Electro-insulating Paper Degradation in Various Electro-insulating Fluids." Revista de Chimie 69, no. 1 (February 15, 2018): 91–95. http://dx.doi.org/10.37358/rc.18.1.6050.

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The durability and safe operation of electrical equipment and devices with mixed insulation systems (solid/fluid - electro-insulating paper/oil) is determined by the insulation aging under simultaneous and synergic actions of electrical, thermal and chemical stress factors etc. In this context, degradations of insulating paper exposed to thermal aging in 5 different types of electro-insulating fluid have been studied experimentally. Liquid chromatography determinations have shown that the total content in furan products (resulting from cellulose degradation) in mineral oils is substantially higher than in electro-insulating fluid sorts based on of synthetic ester and/or natural ester (vegetable oil). This is due to the temperature between 90 oC and 130 oC when the activation energy of the furans formation process is up to 7.5 times lower in mineral oils than in ester-based oils. Degree determinations of cellulose polymerization (viscosimetric method) before and after exposure to heat treatment indicated that mineral oils degrade the electro-insulating paper much more strongly than ester-based oils (both synthetic and natural). Obtained results by liquid chromatography and by viscosity are in accordance with the images obtained by optical microscopy (at X 100).
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Lingvay, Iosif, Adriana Mariana Bors, Livia Carmen Ungureanu, Valerica Stanoi, and Traian Rus. "Studies on the Behavior Some Paints in Electro-insulating Fluid Based on Vegetable Esters." Revista de Chimie 69, no. 5 (June 15, 2018): 1139–44. http://dx.doi.org/10.37358/rc.18.5.6276.

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For the purpose of using three different types of painting materials for the inner protection of the transformer vats, their behavior was studied under actual conditions of operation in the transformer (thermal stress in electro-insulating fluid based on the natural ester in contact with copper for electro-technical use and electro-insulating paper). By comparing determination of the content in furans products (HPLC technique) and gases formed (by gas-chromatography) in the electro-insulating fluid (natural ester with high oleic content) thermally aged at 130 �C to 1000 hours in closed glass vessels, it have been found that the presence the investigated painting materials lead to a change in the mechanism and kinetics of the thermo-oxidation processes. These changes are supported by oxygen dissolved in oil, what leads to decrease both to gases formation CO2, CO, H2, CH4, C2H4 and C2H6) and furans products (5-HMF, 2-FOL, 2 -FAL and 2-ACF). The painting materials investigated during the heat treatment applied did not suffer any remarkable structural changes affecting their functionality in the electro-insulating fluid based on vegetable esters.
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Da Silva, Jadiel Caparrós. "Analysis of the application of Insulating Vegetable Oil in electric power distribution transformers." Academic Journal on Computing, Engineering and Applied Mathematics 1, no. 3 (September 17, 2020): 1–10. http://dx.doi.org/10.20873/uft.2675-3588.2020.v1n3.p1-10.

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Distribution transformers are present in large quantities in the electrical system, in addition to being essential equipment for delivering quality and reliable energy to consumers. This distribution transformers have a dielectric insulation and refrigeration system, with Insulating Mineral Oil (IMO) being the most used. However, the large-scale use of IMO entails a very high environmental risk, because in addition to its fossil origin (petroleum), it also has low biodegradability and is highly toxic and polluting to the environment. In view of this, substitution alternatives for the IMO began to be sought, where, over the years and with technological advances, Insulating Vegetable Oil (IVO) with characteristics similar to the IMO emerged, in addition to being highly biodegradable and providing an alternative sustainable development for the construction of transformers. Thus, the objective of this work is to carry out an analytical study about the characteristics and benefits of using the vegetable fluid for the equipment and for the environment, in addition to comparing the efficiency and cost parameters of IVO and IMO according to current standards. As a contribution, this paper seeks to provide a broad theoretical foundation on IVO and IMO in order to provide conceptualization to agroenergy researchers.
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Hiramatsu, Yushi, Kosuke Kamidani, Yuichi Murakami, and Yuji Muramoto. "Effect of Temperature on AC Breakdown Properties of Vegetable-Oil-Based Insulating Fluid." IEEJ Transactions on Fundamentals and Materials 138, no. 7 (July 1, 2018): 380–86. http://dx.doi.org/10.1541/ieejfms.138.380.

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Hiramatsu, Yushi, Yuichi Murakami, and Yuji Muramoto. "AC Breakdown Properties of Vegetable-Oil-Based Insulating Fluid Containing NaCl (Aqueous Solution and Particles)." IEEJ Transactions on Fundamentals and Materials 141, no. 7 (July 1, 2021): 428–34. http://dx.doi.org/10.1541/ieejfms.141.428.

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Hiramatsu, Yushi, Yuichi Murakami, and Yuji Muramoto. "Effect of Water on AC Breakdown Properties of Mineral Oil and Vegetable-oil-based Insulating Fluid." IEEJ Transactions on Fundamentals and Materials 140, no. 3 (March 1, 2020): 149–55. http://dx.doi.org/10.1541/ieejfms.140.149.

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Bin Yahya, Muhammad, and Fatin Amirah Binti Amirrazli. "Study of Breakdown Voltage of Vegetables oil with SiO2 Nanoparticle Additive." Indonesian Journal of Electrical Engineering and Computer Science 12, no. 1 (October 1, 2018): 296. http://dx.doi.org/10.11591/ijeecs.v12.i1.pp296-302.

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<p>This paper investigates the suitability of vegetable oils to replace mineral oil based on its AC breakdown voltage, partial discharge and viscosity. The purpose of the study is to analyze the effect of the nanofluids containing SiO<sub>2</sub> nanoparticle in vegetables oils; namely, Coconut oil and Palm oil. A nanofluid is a fluid containing nanoparticles. However, the precise effects on the electrical properties is still uncertain. For decades, transformers use petroleum-based mineral oil because of its good dielectric properties and cooling capability. Coconut oil (CO) and Palm oil (PO) are thought to be suitable alternatives to replace mineral oil as transformer oil as they are sustainable and available in plenty as natural resources. It was obtained in this study that the breakdown voltages of these raw oils have fulfilled the standard specifications of good insulating liquid. However, the addition of SiO<sub>2</sub> did not improve the AC breakdown voltage and viscosity of coconut oil and palm oil at different temperatures. However, the addition of SiO<sub>2</sub> gave positive results in the values of partial discharges in which the presence of the nanoparticles has greatly reduced the mean volume of partial discharges for both coconut oil and palm oil.</p>
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Badagliacco, Dionisio, Carmelo Sanfilippo, Bartolomeo Megna, Tommaso La Mantia, and Antonino Valenza. "Mechanical and Thermal Properties of Insulating Sustainable Mortars with Ampelodesmos mauritanicus and Pennisetum setaceum Plants as Aggregates." Applied Sciences 11, no. 13 (June 25, 2021): 5910. http://dx.doi.org/10.3390/app11135910.

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The use of natural fibers in cement composites is a widening research field as their application can enhance the mechanical and thermal behavior of cement mortars and limit their carbon footprint. In this paper, two different wild grasses, i.e., Ampelodesmos mauritanicus, also called diss, and Pennisetum setaceum, also known as crimson fountaingrass, are used as a source of natural aggregates for cement mortars. The main purpose is to assess the possibility of using the more invasive crimson fountaingrass in place of diss in cement-based vegetable concrete. The two plant fibers have been characterized by means of scanning electron microscopy (SEM), helium picnometry and thermogravimetric analysis. Moreover, the thermal conductivity of fiber panels has been measured. Mortars samples have been prepared using untreated, boiled and Polyethylene glycol 4000 (PEG) treated fibers. The mechanical characterization has been performed by means of three point bending and compression tests. Thermal conductivity and porosity have been measured to characterize physical modification induced by fibers’ treatments. The results showed better thermal and mechanical properties of diss fiber composites than fountaingrass one and that fiber treatments lead to a reduction of the thermal insulation properties.
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Lingvay, Iosif, Gabriela Oprina, Valerica Stanoi, Alexandra Pica, Livia Carmen Ungureanu, and Florentina Serban. "Studies on the Influence of Copper and Insulation Paper on the Accelerated Thermal Ageing of Some Insulating Fluids." Revista de Chimie 68, no. 11 (December 15, 2017): 2551–55. http://dx.doi.org/10.37358/rc.17.11.5926.

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The behaviour of some insulating fluids in contact with copper foil and / or insulation paper under thermal stress (110�30C for 1000 hours), in a closed system (the access of atmospheric oxygen being limited), has been studied by determining the changes in viscosity and concentration of CO2 and CO. The experimental data revealed that, following the applied heat treatment, the change in viscosity of the esters-based insulating fluids (both synthetic and vegetable) is approximately 7 times lower than in the case of the investigated mineral oils. It has also been found that, following the thermal ageing, the gas content of the mineral oils is substantially higher than in the esters-based oils (8 times higher for CO2 and 4 times higher for CO, respectively). The experimental results indicate superior values for the thermal stability and compatibility with the insulation paper of ester-based insulating fluids.
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Chairul, Imran Sutan, Sharin Ab Ghani, Nur Hakimah Ab Aziz, Mohd Shahril Ahmad Khiar, Muhammad Syahrani Johal, and Mohd Aizzat Azmi. "Effect of electrical discharge on the properties of natural esters insulating fluids." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (September 1, 2021): 1281. http://dx.doi.org/10.11591/ijeecs.v23.i3.pp1281-1288.

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<p>Vegetable oils have been an alternative to mineral oil for oil-immersed transformers due to concern on less flammable, environmental-friendly, biodegradable, and sustainable resources of petroleum-based insulating oil. This paper presents the effect of electrical discharges (200 up to 1000 discharges) under 50 Hz inhomogeneous electric field on the properties (acidity, water content, and breakdown voltage) of two varieties of vegetable based insulating oils; i) natural ester (NE) and ii) low viscosity insulating fluids derived from a natural ester (NE<sub>LV</sub>). Results show the water content, acidity and breakdown voltage of NE fluctuate due to applied discharges, while NE<sub>LV</sub> display insignificant changes. Hence, results indicate that the low viscosity insulating fluids derived from natural ester tend to maintain their properties compared to natural ester.</p>
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Dissertations / Theses on the topic "Vegetable insulating fluid"

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Abdelmalik, Abdelghaffar Amoka. "The feasibility of using a vegetable oil-based fluid as electrical insulating oil." Thesis, University of Leicester, 2012. http://hdl.handle.net/2381/10374.

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Esters of palm kernel oil have been synthesized and characterized for application as electrical insulating oil. Since such fluids serve both as insulants and coolants, tests were performed to characterize the chemical, physical and dielectric properties. Accelerated ageing tests were carried out to mimic conditions in a power transformer. Alkyl esters were synthesized from laboratory purified palm kernel oil: methyl ester was prepared through a transesterification reaction; an epoxidation reaction involving the methyl ester produced with insitu per-acetic acid in the presence of a catalyst to produce corresponding epoxy alkyl ester. This was then reacted with acid anhydrides under nitrogen in the presence of catalyst. This opened the epoxy rings of the epoxy alkyl oleate and linoleate components to attach side hydrocarbon chains. The characteristics and composition of the products were monitored using GC-MS and FTIR spectroscopy. The synthesized ester possessed a flash point that satisfied the specified minimum flash point for mineral oil, higher thermo-oxidative stability, and high and reliable breakdown strength from the distribution of breakdown data (43 kV/mm). It has a melting point of about -7˚C which is higher than mineral oil. An ester-paper sample which was aged in a pressure vessel under nitrogen and metal catalysts exhibited improved performance compared with the mineral oil-paper system. The rate of decrease in the tensile strength of alkyl ester-paper within the ageing condition was significantly lower than mineral oil-paper. Impregnation of cellulose paper with ester increased the charge storage capacity of the insulating paper. A strong low frequency dielectric dispersion (LFD) was observed which became more pronounced with ageing. Quasi-DC conduction was deduced to have dominated the low frequency response of alkyl ester-paper. The characteristic breakdown strength of the aged paper samples in comparison with the unaged sample did not show any significant difference. It is suggested that the synthesized ester is as good as mineral oil in many ways and a viable alternative fluid for cooling and insulating power transformers.
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Primieri, Cornélio. "Avaliação da estabilidade a oxidação de óleo vegetal de crambe (Crambe abyssinica Hochst) como fluido isolante." Universidade Estadual do Oeste do Parana, 2012. http://tede.unioeste.br:8080/tede/handle/tede/820.

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Made available in DSpace on 2017-07-10T15:14:43Z (GMT). No. of bitstreams: 1 Cornelio Primieri.pdf: 3721204 bytes, checksum: 8dabdaaf2812e1f80bfd5bfcd26f1dd1 (MD5) Previous issue date: 2012-02-24
This research aimed overall assessment of a new plant insulating fluid, using as raw vegetable oil culture of crambe (Crambe abyssinica Hochst). Specific objectives were to evaluate the oxidation stability of crambe oil with various types of typical antioxidants used in edible vegetable oils available in the domestic market, aiming at a new plant insulating fluid, using a raw vegetable oil that does not compete with human food chain / animal. The experiment was conducted at the Research Laboratory of Oil Chemistry of College Assis Gurgacz-FAG. In the municipality of Cascavel / PR, a Latitude 24 º 56 'South, Longitude 53 º 30' W and altitude of 682 m in the period from September to December 2011. The methodology used was called Rancimat equipment, a device which simulates the two main parameters that affect the oxidation stability of greases matters, which are the action of high temperatures and the presence of oxygen, which presents results as an induction period which is represented by periods in hours. From the data collected during testing of the samples prepared using the Rancimat temperatures of 110 ° C and 130 ° C, an average was calculated for each typ e of antioxidant, as well as their concentrations and mixtures. The survey results showed that the sample that showed the best oxidation stability at 110 ° C was obtaine d from the use of antioxidant TBHQ in a concentration of 0.3% m / m (52.96 h). The worst case was the DBPC 0.1% m / m (6.72 h). At temperatures of 130 ° C, the best re sult was TBHQ 0.3% m / m (12.67 h) and DBPC worst case was 0.1% m / m (0.61 h). Thus, we conclude that to obtain a new fluid-based insulation plant crambe is feasible to use the antioxidant TBHQ, with a concentration of 0.3% m / m.
A presente pesquisa teve como objetivo geral a avaliação de um novo fluído vegetal isolante, utilizando como matéria prima o óleo vegetal da cultura do crambe (Crambe abyssinica Hochst). Como objetivo específico a avaliação da estabilidade à oxidação do óleo de crambe com diversos tipos de antioxidantes típicos utilizados em óleos vegetais comestíveis disponíveis no mercado nacional, visando um novo fluído vegetal isolante, utilizando matéria prima um óleo vegetal que não compete com a cadeia alimentar humana/animal. O experimento foi conduzido no Laboratório de Pesquisas em Óleo Química da Faculdade Assis Gurgacz-FAG, no município de Cascavel/PR, a uma Latitude 24º56 Sul, Longitude de 53º30 Oeste e altitude de 682 m, no período de setembro a dezembro de 2011. A metodologia utilizada foi a do equipamento denominado de Rancimat, equipamento este que simula os dois principais parâmetros que afetam a estabilidade a oxidação das matérias graxas, que são a ação das temperaturas elevadas e a presença de oxigênio, o que apresenta como resultados um período de indução que é representado por períodos em horas. A partir dos dados coletados nos ensaios das amostras elaborados no Rancimat utilizando temperaturas de 110ºC e 130ºC, foi calculada uma média para cada tipo de antioxidante, bem como suas concentrações e misturas. Os resultados da pesquisa demonstraram que a amostra que apresentou a melhor estabilidade a oxidação a 110ºC foi obtida do uso do antioxidante TBHQ com uma concentração de 0,3% m/m (52,96 h). O pior caso foi o DBPC a 0,1% m/m (6,72 h). Para temperaturas de 130ºC, o melhor resultado foi o TBHQ a 0,3% m/m (12,67 h) e o pior caso foi o DBPC a 0,1% m/m (0,61 h). Deste modo, conclui-se que para obter-se um novo fluído vegetal isolante a base de crambe é viável a utilização do antioxidante TBHQ, com uma concentração de 0,3% m/m.
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Vodička, Tomáš. "Teplotní degradace alternativních elektroizolačních kapalin." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242854.

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This thesis deals with alternative thermal degradation of electrical insulating liquids. The theoretical part describes the current state of the problem, electrical insulating liquids, their classification and types. There are described properties of electrical insulating liquids, their models of aging and diagnostic methods in accordance with the appropriate standards. In the practical part are chosen by representatives of alternative electrical insulating liquids and there are determined their dielectric characteristics in the initial state. According to the measured values is chosen five candidates for which it is designed and implemented an accelerated degradation test. During the test are measured dielectric parameters of the selected oils. Measured dependencies are mathematically approximated. In conclusion, the results are compared and physically interpreted in view of oxidation stability.
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Conference papers on the topic "Vegetable insulating fluid"

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Boss, P. "New insulating fluids for transformers based on biodegradable high oleic vegetable oil and ester fluid." In IEE Colloquium Insulating Liquids. IEE, 1999. http://dx.doi.org/10.1049/ic:19990669.

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Bertrand, Yves. "Development of a low viscosity insulating fluid based on vegetable oil." In 2012 IEEE International Symposium on Electrical Insulation (ISEI). IEEE, 2012. http://dx.doi.org/10.1109/elinsl.2012.6251501.

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Kamidani, Kosuke, Yushi Hiramatsu, and Yuji Muramoto. "AC breakdown properties of vegetable-oil-based insulating fluid over 100 °C." In 2017 International Symposium on Electrical Insulating Materials (ISEIM). IEEE, 2017. http://dx.doi.org/10.23919/iseim.2017.8166585.

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Hiramatsu, Yushi, Kosuke Kamidani, and Yuji Muramoto. "Effect of water on AC breakdown properties of vegetable-oil-based insulating fluid mixed with mineral oil." In 2017 International Symposium on Electrical Insulating Materials (ISEIM). IEEE, 2017. http://dx.doi.org/10.23919/iseim.2017.8088724.

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Mohammed, L. Syed, Mazood, M. Bakrutheen, M. Willjuice, Iruthayarajan, and M. Karthik. "Studies on critical properties of vegetable oil based insulating fluids." In 2015 Annual IEEE India Conference (INDICON). IEEE, 2015. http://dx.doi.org/10.1109/indicon.2015.7443438.

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