ECT of ethanol and hexane mixtures in the spinning disk system

Zdanowski, Maciej; Wolny, S.; Zmarzły, D.; Boczar, T.

doi:10.1016/j.elstat.2006.08.005

Cited by 18 publications

(10 citation statements)

References 6 publications

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“…A high similarity was observed in the shape of the characteristics and a distinct value increase of the current measured, in particular for higher diameters. It should be noted that a linear relation between the electrification current and the rotational speed, at various geometric dimensions of the disk, is consistent with earlier research on insulation oil and pure hydrocarbons and their mixtures [7,[15][16][17]. Figure 3 illustrates the dependences of the electrification current on the percentage concentration of hexane in toluene at a rotational speed n = 400 rpm, for a disk diameter of 6 cm.…”

Section: Analysis Of the Ectsupporting

confidence: 86%

“…This relation can be described by a simple formula in the following way: log(Y) = -0.95 log(X) -5.95. This parameter was determined from the electrification model for the disk system, which was shown, among others, in [7,8,16]. The liquid properties strongly affect the charge q w of the mixtures under study, which varies in a very wide range during admixing toluene with hexane.…”

Section: Analysis Of Physicochemical Parametersmentioning

confidence: 99%

“…The changing parameters are both the elements affecting the hydrodynamics of the liquid (rotational speed, shape and a disk diameter) and the properties connected with the flowing liquid (changes caused by the process of aging, water and inhibitor contents, temperature, and others). Due to a complex chemical structure of insulation oil, research on ECT has also been conducted on simple liquids, of high chemical purity (pure hydrocarbons, alcohols) [13][14][15][16][17][18]. Hexane and toluene, chemically simple liquids of high purity (Pro analysi) that are components of mineral oil, are suggested for the research on ECT.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Zdanowski

2008

IEEE Trans. Dielect. Electr. Insul.

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The paper presents research results on ECT (Electrostatic Charge Tendency) of hexane and toluene mixtures, that is dielectric liquids of a simple chemical structure and high purity (Pro analysi). The research tests are carried out in a spinning disk system, where the factors affecting the value of the electrification current registered are a varying composition of the mixture, rotational speed and a disk diameter. In the next stage physicochemical parameters are measured in order to determine the relationship between the properties of the mixtures under study and the electrification current generated. The research results show that the ECT of the mixture depends, to a large extent, on the proper selection of particular components.

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Section: Analysis Of the Ectsupporting

confidence: 86%

Section: Analysis Of Physicochemical Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Zdanowski

2008

IEEE Trans. Dielect. Electr. Insul.

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“…The scope of ECT tests included, among others, the effect of flow velocity [16], temperature [17], thermal aging [18]. Clean hydrocarbons and their mixtures [19][20][21], mineral [22,23] and synthetic [24,25] oils were tested. This paper aims to compare the ECT of two insulation liquids used for cooling power transformers, and to determine the risk of streaming electrification present during the flow of them.…”

Section: Introductionmentioning

confidence: 99%

Streaming electrification of mineral insulating oil and synthetic ester MIDEL 7131

Zdanowski

2014

IEEE Trans. Dielect. Electr. Insul.

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Determining the Electrostatic Charging Tendency (ECT) level of insulating liquids requires no large and therefore costly transformers or modelling systems. Small laboratory systems are characterised by simple design and methodology, low volume of liquid sample required for testing, low cost of construction and the following tests. This also applies to pipe flow systems. This paper presents comparative studies of the phenomenon of streaming electrification of mineral TRAFO EN insulating oil and MIDEL 7131 ® synthetic ester flowing through a pipe made of conventional cellulose paper and modern aramid paper. Electrification current vs. liquid flow speed was measured. The influence of pipe material was determined. Also the effect of temperature and sample aging time on the extent of the streaming electrification was studied. With the Abedian-Sonin model, volume density of the q w charge, which is a parameter describing ECT of insulating liquids, was determined.

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“…Certainly, the definite relation between the electrification degree of oil flow and electrostatic current must be acquired before the calculation. That is to say, the mathematical expression of the relation between the electrification degree of oil flow and the electrostatic current must be researched [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Research on the Relation between Transformer Oil Flow Electrification and Electrostatic Current

Fu¹,

Wang²,

Zou³

et al. 2015

Journal of Electrical Engineering and Technology

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-In order to study and obtain the mathematical relation between the electrification degree of transformer oil flow and the electrostatic current, a small amount of data about the electrification degree of oil flow and the corresponding electrostatic current is studied by linear regression method and grey model method. The results show that the linear correlation between the electrification degree and the electrostatic current was not good, and the relation between the electrification degree of oil flow and electrostatic current (i) could be expressed as ρ (0) =0.2049 i (0) +169.4419 according to grey model GM (0, 2) when the electrification degree of oil flow is represented by the charge number generated from transformer oil per unit volume, namely the charge density (ρ).

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ECT of ethanol and hexane mixtures in the spinning disk system

Cited by 18 publications

References 6 publications

Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Influence of Composition of Dielectric Liquid Mixtures on Electrostatic Charge Tendency and Physicochemical Parameters

Streaming electrification of mineral insulating oil and synthetic ester MIDEL 7131

Research on the Relation between Transformer Oil Flow Electrification and Electrostatic Current

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