Aromatic and aliphatic hydrocarbon balance in electric transformer oils

Kaanagbara, Life; Inyang, Hilary I.; Wu, Jy S.; Hilger, Helene

doi:10.1016/j.fuel.2010.02.013

Cited by 28 publications

(5 citation statements)

References 6 publications

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“…The insulating mineral oil in power transformers consists of complex blends of >3000 hydrocarbons, the physicochemical properties of which are required to maintain proper functioning of the transformer [8]. Oil molecules contain two or more cyclic fragments with aliphatic chains, meaning that the aliphatic chain length is greater as the viscosity index is higher yielding a small variation in viscosity with temperature.…”

Section: Degradation Mechanism Of Transformer Oilmentioning

confidence: 99%

Transformer oil reclamation by combining several strategies enhanced by the use of four adsorbents

Safiddine

Zafour

Fofana³

et al. 2017

IET Generation, Transmission & Distribution

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Section: Degradation Mechanism Of Transformer Oilmentioning

confidence: 99%

Transformer oil reclamation by combining several strategies enhanced by the use of four adsorbents

Safiddine

Zafour

Fofana³

et al. 2017

IET Generation, Transmission & Distribution

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“…Even though the dielectric constant of oil samples slightly decreases with increase in temperature, it reduced the density of oil, which is directly related to density of dipole in the oil samples. Besides that, increase in temperature could increase kinetic energy of particles in the oil, which decreases the dipole orientation, which is responsible for low‐dielectric constant …”

Section: Resultsmentioning

confidence: 99%

“…Besides that, increase in temperature could increase kinetic energy of particles in the oil, which decreases the dipole orientation, which is responsible for low-dielectric constant. 30,31 Dielectric dissipation factor is the index term for assessing the quality of oil. For all sampling intervals, the dielectric dissipation factor of MOWC is much higher than KOWC as shown in Figure 3, since the bond between carbon and hydrogen is easily broken under thermal stress, whereas Karanja oil has higher viscosity and density, which limit the dissociation rate of oil molecules.…”

Section: Resultsmentioning

confidence: 99%

Feasibility analysis of Karanja oil as alternate liquid dielectrics for distribution transformers

Mariprasath

Kirubakaran

Kumar³

2017

Int. Trans. Electr. Energ. Syst.

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Summary Traditional mineral oil is used as a liquid dielectric in distribution transformers. Because of its limited fire‐resistant characteristics and biodegradability and also because of the lack of fossil fuels, the search for alternate liquid dielectrics for distribution transformer is essential. This research work has been proposed on nonedible Karanja oil as a liquid dielectric for distribution transformers. Hence, the electrical properties, physical properties, and chemical properties of Karanja oil with catalyst are measured at the temperatures of 40°C, 60°C, 80°C, 100°C, and 120°C as per the international standards; results are compared with mineral oil. From the experimental analysis, it is found that an electrical characteristic of Karanja oil with catalyst is better than mineral oil with catalyst. Furthermore, Karanja oil with catalyst has much higher acidity than others, but it is beneficial. Also, Karanja oil with catalyst has low‐relative water content than mineral oil with catalyst. However, the viscosity of the oil with catalyst is much higher than mineral oil; so care must be taken for designing the cooling tubes of a transformer.

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“…The above methods for measuring the vapor pressure of liquid organic composites are generally available for the pure component or those separable mixture systems which the chemical constants can be provided by the present researches. However, it is well known that petroleum-based transformer oils used in transformers have a diverse and large number of compounds which consists of complex blends of more than 3000 hydrocarbons [24]. It is not practical, indeed it may be impossible, to perform a complete component analysis to such systems [25].To overcome the mentioned testing deficiency and provide the detailed fundamental data for engineering fields, the vapor pressure of transformer oil was measured at various pressures by a constructed apparatus.…”

Section: Introductionmentioning

confidence: 99%

A Simple Method to Evaluate the Vapor Pressure of Transformer Oil at Various Temperatures

Hong¹,

Lv²,

Liu³

et al. 2018

Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)

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Transformer oil as an important mineral oil is widely used in power equipments and its fundamental properties can be obviously presented by the vapor pressure which is difficult to be accurately evaluated due to its complex compounds. According to the testing mechanism of thermal balance, a simple method is proposed to evaluate the vapor pressure of transformer oil at various temperatures. The thermal stability and chemical components of the tested oil are characterized and discussed. The experiment data correlation to the vapor pressure of transformer oil is further performed by the typical Clausius-Clapeyron equation. It reveals that the vapor pressure of transformer oil is positively related to temperature environment. Moreover, a deep comparison between the experiment data and the correlated result confirms that the applied evaluating method is a suitable way to evaluate the vapor pressure of transformer oil and other liquid compounds system.

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Aromatic and aliphatic hydrocarbon balance in electric transformer oils

Cited by 28 publications

References 6 publications

Transformer oil reclamation by combining several strategies enhanced by the use of four adsorbents

Transformer oil reclamation by combining several strategies enhanced by the use of four adsorbents

Feasibility analysis of Karanja oil as alternate liquid dielectrics for distribution transformers

A Simple Method to Evaluate the Vapor Pressure of Transformer Oil at Various Temperatures

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