Electrical and physicochemical properties of mineral and vegetable oils mixtures

Toudja, T.; Chetibi, F.; Beldjilali, A.; Moulai, H.; Béroual, Abderrahmane

doi:10.1109/icdl.2014.6893145

Cited by 24 publications

(15 citation statements)

References 8 publications

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“…In turn, McShane et al in [18] present information concerning viscosity of a mixture of mineral oil and natural esters depending on their proportions. However, these data were presented only for the mixtures whose temperatures were 40ºC and 100 o C. In [27,29] we can find data concerning the influence of temperature and the proportions on the density of mixtures based on mineral oil and natural esters.…”

Section: Introductionmentioning

confidence: 99%

“…In [6,27,29,30] the authors present research results concerning the influence of proportions of oil and esters and the level of ageing on such electric properties as the dielectric loss factor tg(δ), electric permeability, and breakdown voltage. In turn, Suwarno in [28] presented the influence of thermal ageing of a mixture of mineral oil and natural ester on such electric properties as breakdown voltage, resistivity, the dielectric loss factor, and electric permittivity.…”

Section: Introductionmentioning

confidence: 99%

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Thermal properties of a mixture of synthetic and natural esters in terms of their application in high voltage power transformers

Dombek¹,

Nadolny²

2016

EiN

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal properties of a mixture of synthetic and natural esters in terms of their application in high voltage power transformers

Dombek¹,

Nadolny²

2016

EiN

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“…In this examination, the TO is kept up as the base protecting oil for correlation purposes. The ultimate aim of the proposed study is to examine how ageing affects the electrical performance, chemical properties and the mechanical properties of vegetable oils with impregnated paper [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Various Natural Ester Oils Impregnated Nomex Paper Performance in Power Transformer Applications under Different Ageing Conditions

Kumar*¹,

Moshi²,

Bharathi³

et al. 2019

IJRTE

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Vegetable oils are being considered as the potential replacements to mineral oils because of their better natural execution and for their high fire point. In spite of the fact that these fluids have been utilized as a part of appropriation transformers, it is as yet a huge advance to receive vegetable oils in control transformer because of high cost and abnormal state of well being and unwavering quality required in benefit for these units. Vegetable oils such as honge oil (HO), neem oil (NO), mustard oil (MO), punna oil (PO) and castor oil (CO) offer the reasonable option for mineral oil. It is expected that the greater part of the un-matured oil could fulfil the base necessity of dielectric protection fluids in the transformer. This paper concentrated on the impact of maturing on the electrical and physicochemical properties of HO, NO, MO, PO and CO. Fixed maturing tests have been set at 90°C for 30 days, 60 days and 90 days. Prior to the maturing procedure, the examples were dried in a vacuum broiler under the pressure of 0.8kPa at 85°C for 48 hours keeping in mind the end goal to evacuate the dampness content in the oils. At that point, the oils were impregnated with the Nomex paper and keep on ageing for choosing the span time. The electrical properties (relative permittivity, dielectric misfortunes, resistivity and breakdown quality), mechanical properties (thickness and elasticity) and substance properties (dampness and corrosiveness) of the oils were estimated all through the maturing time frames. It can be reasoned that the research center quickened warm maturing test uncovers that every single vegetable oil in this examination are safe towards oxidation in light of the steady thickness and low corrosiveness estimations of vegetable oils all through the maturing term even with the nearness of oxygen. The AC breakdown voltages of vegetable oils can in any case conform to the prescribed furthest reaches of new Vegetable oil set by ASTM 6781 even after subjected to maturing. From the results, it may be concluded that the proposed vegetable oils can be used as the alternatives for mineral oil.

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“…The key success of mineral oil is primarily due to its three advantages: good dielectric properties, low costs associated with its availability, and very good recognition of this liquid [11,12]. However, the growing requirements regarding fire safety and environmental protection, as well as extending the lifetime of transformers, has forced their producers and users to search for alternative electro-insulating liquids for mineral oil [13,14]. To a large extent, the alternative to mineral oil is considered to be natural and synthetic esters.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nanoparticles Materials on Heat Transfer in Electro-Insulating Liquids

2018

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This paper discusses the effect of doping of electro-insulating liquids with nanoparticle materials on the thermal properties of the obtained nanoliquids and heat transport in the transformer. Mineral oil, synthetic ester, and natural ester were used as base liquids. The effectiveness of doping base liquids with nanoparticles was supported by ultraviolet-visible (UV/VIS) measurements. In turn, Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) confirmed the absence of intermolecular interactions (i.e., hydrogen bonding). The influence of modification of electro-insulating liquids with fullerene C60 and titanium dioxide TiO2 nanoparticles on such thermal properties as thermal conductivity, specific heat, kinematic viscosity, density, and thermal expansion was investigated. Based on these properties and the theory of similarity, the cooling efficiency of the transformer filled with the analyzed nanofluids was determined. Nanofluids’ cooling effectiveness was compared with the cooling effectiveness of the base liquids. This comparison was supported by an analysis of Grashof, Prandtl, and Nusselt numbers. It has been shown that the modification of electro-insulating liquids with nanoparticles widely used in order to improve their dielectric properties, such as C60 and TiO2, does not have a significant influence on their thermal properties. The addition of fullerene C60 caused an increase in kinematic viscosity, which was compensated by the increase in specific heat. In the case of TiO2, the addition of this nanoparticle resulted in an increase in kinematic viscosity and a decrease in specific heat, which were balanced out by the increase in thermal conductivity. In summary, the heat exchange-capacity of liquids did not change due to doping with nanoparticles.

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Electrical and physicochemical properties of mineral and vegetable oils mixtures

Cited by 24 publications

References 8 publications

Thermal properties of a mixture of synthetic and natural esters in terms of their application in high voltage power transformers

Thermal properties of a mixture of synthetic and natural esters in terms of their application in high voltage power transformers

Optimization of Various Natural Ester Oils Impregnated Nomex Paper Performance in Power Transformer Applications under Different Ageing Conditions

Effects of Nanoparticles Materials on Heat Transfer in Electro-Insulating Liquids

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