Investigation on the Dielectric, Physical and Chemical Properties of Palm Oil and Coconut Oil under Open Thermal Ageing Condition

Mohamad, Nur Aqilah; Azis, Norhafiz; Jasni, Jasronita; Kadir, Mohd Zainal Abidin Ab; Yunus, Robiah; Ishak, Mohd Taufiq; Yaakub, Zaini

doi:10.5370/jeet.2016.11.3.690

Cited by 18 publications

(14 citation statements)

References 21 publications

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“…A previous study [8] revealed that there is no apparent effect of the ageing on the physiochemical and electrical properties RBDPO at 115 °C under open conditions. However, the current study shows that several physicochemical and electrical properties of both RBDPO were affected by an ageing temperature of 170 °C under open conditions.…”

Section: Discussionmentioning

confidence: 90%

“…A previous study [8] revealed that there is no apparent effect of the ageing on the physiochemical and electrical properties RBDPO at 115…”

Section: Discussionmentioning

confidence: 94%

“…Previous studies revealed that the electrical and physiochemical properties of new PO are close to other types of natural esters and mineral oil (MO) [3][4][5][6]. The majority of these properties are comparable to other types of vegetable oils under ageing at temperatures ranging from 85 to 150 • C, which are maintained at acceptable levels according to standards [7][8][9][10][11]. Currently, the high temperature ageing performance of PO has not been well established and requires further investigation.…”

Section: Introductionmentioning

confidence: 99%

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Physiochemical and Electrical Properties of Refined, Bleached and Deodorized Palm Oil under High Temperature Ageing for Application in Transformers

et al. 2018

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This paper presents a high temperature ageing study of refined, bleached, and deodorized palm oil (RBDPO) olein at 170 • C in the presence of air. In total, two types of RBDPO were examined. The physiochemical and dielectric properties of RBDPO were measured and analysed. We found that the moisture and viscosities for both RBDPO increased as the ageing progressed, whereas the acidities fluctuated at very low levels at less than 0.005 mg KOH/g. The ageing on the AC breakdown voltages of both RBDPO were not affected throughout the ageing processes. The dielectric dissipation factors and relative permittivities for both RBDPO increased as the resistivities decreased with the ageing time.

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Section: Discussionmentioning

confidence: 90%

“…A previous study [8] revealed that there is no apparent effect of the ageing on the physiochemical and electrical properties RBDPO at 115…”

Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Physiochemical and Electrical Properties of Refined, Bleached and Deodorized Palm Oil under High Temperature Ageing for Application in Transformers

et al. 2018

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“…A study has been carried out to explore the performance of coconut oil as an insulator [11]. Investigation of different properties of Palm Oil (PO) and Coconut Oil (CO) has been carried out under open thermal ageing condition [12]. The analysis of breakdown strength and ASTESJ ISSN: 2415-6698 physical characteristics of extra virgin olive oil and castor oil under unaged and thermally aged conditions is performed and compared the results with mineral oil with respect to same aging process [13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Dielectric Properties of Indigenous Blended Ester oil for Electric System Applications

Srinivasa¹,

Surendra²,

Pattanshetti³

2020

Adv. sci. technol. eng. syst. j.

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The insulation condition of a transformer decides the longevity of the equipment. The unpredicted failure of power transformer will lead to major disaster in the distribution network and it affects both environment and public safety. Nowadays synthetic oil and natural esters are alternatives to transformer oil because of the biodegradable nature. In this paper, investigations were carried out to study the performance of the blended ester. The different properties investigated were viscosity, breakdown voltage, flash point, dielectric dissipation factor and moisture content. Comparisons of the properties were made between mineral oil, vegetable oil without additives and with additives. Further Investigation was carried out to study the impact of antioxidants and degasification. The results indicated that the addition of antioxidants and degasification of the vegetable oil improve significantly its voltage withstanding capacity. The Indigenous oil is code named as DM; Indigenous oil with DBPC is codenamed as DM1, Indigenous oil with BHA is codenamed as DM2. The results have been tabulated and found to be satisfactory.

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“…Several studies also examine the partial discharge characteristics of RBDPO, as well as the effect of moisture and fat content on the breakdown voltage, dielectric dissipation factor, viscosity, and flash point of RBDPO [ 44 , 45 , 46 , 47 ]. A previous ageing study on RBDPO was carried out under open conditions and without the presence of insulation paper [ 48 ]. On the other hand, a few thermal ageing studies have been carried out on CO that focussed on the oil properties such as interfacial tension, acidity, AC breakdown voltage and dielectric properties [ 49 , 50 ].…”

Section: Introductionmentioning

confidence: 99%

Ageing Study of Palm Oil and Coconut Oil in the Presence of Insulation Paper for Transformers Application

et al. 2018

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This paper presents a sealed ageing study of palm oil (PO) and coconut oil (CO) in the presence of insulation paper. The type of PO under study is refined, bleached, and deodorized palm oil (RBDPO) olein. Three different variations of RBDPO and one sample of CO are aged at temperatures of 90 °C, 110 °C, and 130 °C. The properties of RBDPO and CO as well as paper under ageing are then analysed through dielectric and physicochemical measurements. It is found that the effect of ageing is not significant on the alternating current (AC) breakdown voltages and relative permittivities of RBDPO and CO. There is a slight increment trend of the resistivity for CO, while for all of the RBDPO, the resistivity slightly decreases as the ageing progresses. Only CO shows an apparent reduction of the dielectric dissipation factor. Throughout the ageing time, the acidities of all of the RBDPO and CO remain at low level, while the moisture in oils decreases. The tensile index (TI) of the papers for all of the RBDPO and CO retain more than 50% of the TI. A significant increment of the paper ageing rates of all of the RBDPO and CO is observed at an ageing temperature of 130 °C.

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Investigation on the Dielectric, Physical and Chemical Properties of Palm Oil and Coconut Oil under Open Thermal Ageing Condition

Cited by 18 publications

References 21 publications

Physiochemical and Electrical Properties of Refined, Bleached and Deodorized Palm Oil under High Temperature Ageing for Application in Transformers

Physiochemical and Electrical Properties of Refined, Bleached and Deodorized Palm Oil under High Temperature Ageing for Application in Transformers

Investigation of Dielectric Properties of Indigenous Blended Ester oil for Electric System Applications

Ageing Study of Palm Oil and Coconut Oil in the Presence of Insulation Paper for Transformers Application

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