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The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.
Bi-Annual IEEE PES T&D conference. Largest T&D conference in North America.
The Annual Meeting is a gathering of experts who work and conduct research in the industrial applications of electrical systems.
The conference is intended to provide an international forum for the exchange of information on state-of-the-art research in antennas, propagation, electromagnetics, and radio science.
The conference covers all aspects of the technology associated with ultrasound generation and detection and their applications.
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.
The magazine covers theory, analysis, design (computer-aided design), and practical implementation of circuits, and the application of circuit theoretic techniques to systems and to signal processing. Content is written for the spectrum of activities from basic scientific theory to industrial applications.
This magazine publishes articles concerning technical subjects and professional activities that are within the scope of IAS and are of interest to society members. The information includes but is not limited to articles, product reviews, book reviews, new standards, education information, announcements of conferences, workshops, new publications, committee meetings and reports of IAS activities.
The development and application of electric systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; the encouragement of energy conservation; the creation of voluntary engineering standards and recommended practices.
2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2016
Electrical lifetime is a vital means of assessing the insulation properties of dielectric materials. The hydrolysis process of vegetable insulating oil could generate a lot of acids, which may have a negative impact on the dielectric strength and aging performance of oil-paper insulation. To identify the influence of seven types of acids (formic, acetic, levulinic, oleic, linoleic, palmitic and stearic ...
2012 International Conference on Enabling Science and Nanotechnology, 2012
Over the past few decades, there have been considerable interests in developing biomaterials e.g. micro- or nano-particles and micro-or nano-gels as effective drug delivery carriers. Various polymers e.g. synthetic and natural polymers, have been used in developmental of the drug carrier. Recently, in Malaysia, a group of nuclear scientist from Malaysian Nuclear Agency and University Putra Malaysia had successfully developed ...
2018 19th International Scientific Conference on Electric Power Engineering (EPE), 2018
Oil fluids are commonly used materials in most nowadays transformers not just as dielectric materials, but also as the heat conductor for transferring heat from coils. This paper aims to show what possible effects could nanoparticles have in vegetable oil-based electro-insulating fluid, commercially called ENVITRAFOL. This paper presents the electrical properties of this material based on rapeseed oil and it's ...
2011 IEEE Conference on Clean Energy and Technology (CET), 2011
Karanja oil (a non edible straight vegetable oil) and karanja biodiesel (methyl ester of karanja oil) were blended with petroleum diesel in various proportions to evaluate and compare the performance and emission characteristics of a single cylinder direct injection constant speed diesel engine. Diesel and karanja oil and karanja biodiesel (10%, 20%, 30% and 40%) fuel blends were used to ...
2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2015
Various research groups have demonstrated that Kraft paper insulation degrades slower in vegetable oil than in the commonly used mineral oil. This has been proposed as being beneficial to the utilities because their transformers may either last longer, or they can be run at higher load. However, a mode of failure that is frequently ignored is the inception temperature when ...
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Electrical lifetime is a vital means of assessing the insulation properties of dielectric materials. The hydrolysis process of vegetable insulating oil could generate a lot of acids, which may have a negative impact on the dielectric strength and aging performance of oil-paper insulation. To identify the influence of seven types of acids (formic, acetic, levulinic, oleic, linoleic, palmitic and stearic acids) on the electrical lifetime of vegetable oil impregnated paper insulation, this paper mainly focuses on a comparative accelerated electrical life test among the seven types of acids. The lifetime of vegetable oil impregnated cellulose insulation is estimated by performing the progressive stress tests. The Weibull distribution is utilized to get mean lifetime of oil-paper specimens and the exponential model is applied to fit experimental test data and acquire the voltage endurance coefficients. The breakdown voltage and time of vegetable oil impregnated paper insulation with the seven types of acids were obtained. The influence of acids on the electrical lifetime of vegetable oil impregnated paper insulation was provided at last. Results show that acids can reduce the electrical lifetime of vegetable oil impregnated paper insulation, and the impact of low molecular weight acids on insulation lifetime is about 2-3 times higher than that of high molecular weight acids.
Over the past few decades, there have been considerable interests in developing biomaterials e.g. micro- or nano-particles and micro-or nano-gels as effective drug delivery carriers. Various polymers e.g. synthetic and natural polymers, have been used in developmental of the drug carrier. Recently, in Malaysia, a group of nuclear scientist from Malaysian Nuclear Agency and University Putra Malaysia had successfully developed micro- and nano particles from natural polymer i.e. vegetable oils product using radiation-induced initiator method [1-3]. This vegetable oil product is known as acrylated vegetable oil (AVO) consists of crosslinked nanostructure when subjected to ionizing radiation sources i.e. gamma ray and electron beam was successfully utilized using the local radiation facility for the formation of micro-and nanoparticle carrier based vegetable oil product. Due to this, in this present study, the acrylated vegetable oil nanostructure was used as drug delivery system (DDS) for the incorporation of the bioactive material i.e. Thymoquinone. The work included study on the process for production of the thymoquinone-loaded AVO nanoparticle using radiation-induced method, physiochemical of the product and evaluation of its application in controlled- drug-release applications. The present study obtained varied sizes of the thymoquinone-loaded AVO micro- and nanoparticle (Table 1). Size of the thymoquinone-loaded AVO micro- and nanoparticle is in the range of nanometer and submicron as determined using dynamic light scattering (DLS) (Nanophox, Sympatec). The size of the particle was increasing when the irradiation dose increasing. As a result particle sized is in the range of 150 nm to 220 nm after irradiation at 1 to 25 kGy, respectively (Table 1). Decrease in mean diameter of the AVO micro- and nanoparticle indicates a strong shrinkage of the polymer coils resulting from the crosslinking in the AVO macromolecule structure [1-3]. This crosslinking polymerization leads to the formation of smaller particles, due to the intraparticle crosslinking and to the hampered diffusion of monomer molecules to the macromolecule structure [1-5]. Furthermore, Figure 1 shows the Fourier Transform Infra Red (FTIR) (Shidmazu, Japan) chemical structure of the thymoquinone-loaded AVO micro- and nanoparticle before and after irradiation. The irradiation sensitive functional group i.e. carbon double bond (C=C, acrylic functional group) was found disappeared after the sample was irradiated at wavenumber of υ= 1410, 1620 and 1637 cm-1which revealed that the sample was undergone crosslinking. Besides that, the thymoquinone functional group i.e. dimethyl-p-benzoquina at wavenumber 1240-1250 cm-1is still presence in the AVO micro- and nanoparticle after irradiation (Figure 1). It shows that the thymoquinone was successfully incorporated in the AVO micro- and nanoparticle. The transmission electron microscopy (TEM) (Jeol, Japan) image obtained showed that, the thymoquinone- loaded AVO micro- and nanoparticle is spherical in shape as shown in Figure 2. The study also showed that the AVO micro- and nanoparticle can retain and controlled the release rate of the thymoquinone, see Figure 3. Figure 3 shows the release percentage of the thymoquinone in the 0.2 mol/L of phosphate buffer solution (PBS, pH 7.4) at 37°C as determined using Ultraviolet-visible (UV-Vis) spectrophotometer (Shidmazu, Japan). The study also revealed that such smaller particles can retain the active substance to longer period compared to that larger particle (Figure 3). This study showed that the AVO nanoparticles have successfully incorporated the thymoquinone by radiation- induced initiator method in the microemulsion system. The results obtained showed that, crosslinked nanostructure of the AVO nanoparticle contributed in the incorporation and controlling the release rate of the thymoquinone. Besides that, this crosslinked nanostructure property may help protecting the thymoquinone substance to undergo hydrolysis in the physiological environment. The radiation-induced initiator method that we proposed in this study is especially well suited for biomedical applications because the process is free of monomers, initiators and any other additives [1-5].
Oil fluids are commonly used materials in most nowadays transformers not just as dielectric materials, but also as the heat conductor for transferring heat from coils. This paper aims to show what possible effects could nanoparticles have in vegetable oil-based electro-insulating fluid, commercially called ENVITRAFOL. This paper presents the electrical properties of this material based on rapeseed oil and it's comparison with the same material modified by Al2O3nanoparticles with a different value of wt.%. The goal of this research is to find suitable electro- insulating materials for transformers used in environmentally sensitive areas with biodegradable properties.
Karanja oil (a non edible straight vegetable oil) and karanja biodiesel (methyl ester of karanja oil) were blended with petroleum diesel in various proportions to evaluate and compare the performance and emission characteristics of a single cylinder direct injection constant speed diesel engine. Diesel and karanja oil and karanja biodiesel (10%, 20%, 30% and 40%) fuel blends were used to conduct engine performance and emission tests at varying loads in terms of 25% load increments from no load to full loads. Tests were carried out for engine operation and engine performance parameters such as fuel consumption, brake thermal efficiency, and exhaust emissions (smoke, CO, HC, NO<sub>x</sub>, and O<sub>2</sub>) were recorded. Among the blends KO10 and KB20 have shown a better performance with respect to BTE and BSEC. All KO blends have shown higher HC emissions after about 75% load. KB blends have shown 40-50% reduction in CO emissions compared to diesel at different loads. KO 40 blend showed a 21% reduction in NO<sub>x</sub> emission. KO10 and KB20 have an overall better performance with regards to both engine performance and emission characteristics.
Various research groups have demonstrated that Kraft paper insulation degrades slower in vegetable oil than in the commonly used mineral oil. This has been proposed as being beneficial to the utilities because their transformers may either last longer, or they can be run at higher load. However, a mode of failure that is frequently ignored is the inception temperature when water bubbles form on the surface of the paper insulation around the windings of the transformer. This is dangerous because these bubbles can migrate in between the turns of a winding and cause dielectric failure when the transformer is operating at high load. The formation of these bubbles in vegetable oil was therefore studied using a specially built model of a transformer winding, immersed in oil, electrically heated to different temperatures. The bubble inception temperatures of the tested vegetable oil was found to be generally up to 10 °C higher than that of mineral oil. A question raised is whether this difference is primarily caused by the ability of vegetable oil to dissolve more water than mineral oil, or whether it is caused by the different thermal properties of these oils. This knowledge would help the oil manufacturers create superior products for the industry. In this article we present the measurement results and discuss how the different properties of oils have contributed to the bubbling inception temperature.
This paper reports the effect of water on AC breakdown properties of the vegetable-oil-based insulating fluid mixed with mineral oil. When we replace the mineral oil with the vegetable-oil-based insulating fluid in the high voltage electrical equipment, there are the concerns of containing residual mineral oil. It is called “retrofill”. We mixed the mineral oil into the vegetable-oil-based insulating fluid (0 to 20 [wt%]) and added the water (0 to 600 [ppm]), observed AC breakdown voltage (electric strength Fb). These results were shown as the following: (i) Fb decreased with the increase of water. (ii) Fb decreased with the increase of the ratio of the mineral oil to the vegetable-oil-based insulating fluid with the water content of 0 [ppm]. On the other hand, with the water content of 600 [ppm], Fb rose with the increase of the mixing ratio. (iii) At the water content of 150 and 300 [ppm], Fb showed the maximum value in the mixing ratio of 10 [wt%].
Biodiesel is a renewable energy that comes from natural biodiesel feedstock, such as vegetable oil, animal fat, waste oil, algae, etc. It becomes one of the best alternative solutions for global fossil fuel energy crisis, because it has similar characteristic with diesel oil (petrodiesel). This paper presents the Indonesian potential of vegetable oil based biodiesel feedstock from many potential crops. The objective is to give the perspective for the decision maker and other researchers to give more attention on development of this energy. There are several potential vegetable oil based biodiesel feedstock, i.e. palm oil, coconut oil, soybean oil, rapeseed oil, jatropha, Reutalis Trisperma, etc. But to obtain the most effective biodiesel feedstock for biodiesel production, many issues should be concerned, its productivity (ton/ha/year), biodiesel potential (liter/ha/yr), the national supply, competition with food, International market price, efficiency of biodiesel oil conversion and resistance of its crop to weather-climate changing and pests. Therefore, Jatropha, Reutalis Trisperma and Palm Oil are the best vegetable oil based biodiesel feedstock for Indonesia.
Vegetable oil is based on natural ester oil, which is considered as the alternate natural source of traditional mineral insulating oil in electrical transformers. The oil applied in transformers performs dual functions of insulating and cooling materials. The purpose of this paper is to obtain a new type of nano-modified vegetable oil with both improved dielectric and thermal properties. Boron nitride (BN) nanoparticles with high thermal conductivity were dispersed into vegetable oil to form the nanooil. Thermal and dielectric properties of the samples before and after modification were measured. Temperature change and heat distribution of the samples in heating process were measured by a temperature sensor and an infrared thermal imager. Dielectric property experiments were performed in accordance with IEC standard. Relative permittivity, dissipation factor and electrical conductivity tests of the nanooil were conducted along with ac and dc breakdown strength in a range of temperature. It is found that the nanooil shows improved thermal and dielectric property compared with non-modified oil. Obtained results exhibit significant improvement in heat transfer process with increasing the concentration of BN nanoparticles.
Vegetable oil is considered as the substitute of traditional mineral oil serving as the insulation medium due to the considerable dielectric property and the excellent biodegradation. The vegetable oil filled with boron nitride (BN) nanoparticles showed significant improvement in both thermal and dielectric properties in previous study. Thereby, in this paper, the experiment for space charge measurement of the nano-modified vegetable oil was conducted by thermal step method (TSM) to investigate the influence of BN nanoparticles on the charge distribution in the oil. BN nanoparticles with different mass fractions were dispersed in the origin oil and the space charge distribution was obtained after the sample was short circuited. DC voltages with various magnitudes and times was applied in charging process and showed obvious influence on the charge accumulation. Results showed that the charge density was reduced with the addition of BN nanoparticles as the consequence of the alternation in trap depth and the transportation and dissipation of the corresponding charge.
This paper presents early result of an investigation of partial discharge (PD) properties in vegetable oil-impregnated insulating system. The laboratory experimental investigation simulated common fault conditions in vegetable oil- impregnated paper and pressboard insulating system. PD tests were carried out at elevated temperature to observe possible variation on PD behavior with temperature. In order to investigate the possible differences in measured PD properties, PD data was collected using a PD detector with a variable measurement bandwidth. The experimental results indicated that temperature changes may result in variation of PD properties. The test results also indicated that the measured PD properties also vary with the detector bandwidth.
This guide recommends tests and evaluation procedures, as well as criteria and methods of maintenance, for natural ester-based transformer insulating fluids. These base fluids are also known as vegetable seed oils. Methods of reconditioning natural ester-based insulating fluids are also described. Where instructions given by the transformer or fluid manufacturer differ from those given in this guide, the manufacturer’s instructions ...
This guide recommends tests and evaluation procedures, as well as criteria and methods of maintenance, for natural ester-based transformer insulating fluids. These base fluids are also known as vegetable seed oils. Methods of reconditioning natural ester-based insulating fluids are also described. Where instructions given by the transformer or fluid manufacturer differ from those given in this guide, the manufacturerﾒs instructions ...