An Investigation on Stability, Electrical and Thermal Characteristics of Transformer Insulting Oil Nanofluids

Asefi, M.; Molavi, Hoda; Niassar, M. Shariaty; Darband, J. Babaee; Nemati, Nasrin; Yavari, M.; Akbari, Mahdokht

doi:10.5829/idosi.ije.2016.29.10a.02

Cited by 7 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the increases of thermal conductivity value of nanofluid sample at higher temperatures is due to the increased intensity of Brownian motion effect, which is consistent with the findings reported by Wanatasanappan et al, and M. Asefi et al, in their studies [7,19].…”

Section: Thermal Conductivity Of Nanofluidssupporting

confidence: 93%

Experimental Investigation on Thermal Conductivity of Palm Oil and Zinc Oxide PFAE-based Nanofluids

Nurin Ainanie Azizie,

Nuriziani Hussin,

Hana Abdull Halim

et al. 2023

ARFMTS

View full text Add to dashboard Cite

Vegetable oil (VO) have been constantly researched as an alternative to the conventional mineral oil (MO) in the application of transformer insulation liquid. VO is deemed as a suitable replacement for MO as they are a renewable source, cheaper in price, and have a high thermal conductivity, high flashpoint, and high breakdown voltage value. In addition, the trending interest in nanofluids has made it possible to further improved the insulating properties of VOs. This paper reports the experimental results of thermal conductivity test of Palm oil-based nanofluids and Palm fatty acid ester (PFAE)-based nanofluids. The nanoparticles used in this work is Zinc Oxide (ZnO) <50nm nano powder and the nanofluid (NF) samples are varied by low, medium and high concentrations. The test was conducted at 9 different temperatures from 25°C to 65°C with 5°C gap. The result shows that a low and medium concentration nanofluid has an improvement in thermal conductivity value, up to 42.6% and 59.5% respectively for palm oil-based nanofluid. Meanwhile, the high concentration palm oil-based nanofluid has lower enhancement in thermal conductivity value at certain temperatures. As for PFAE-based nanofluids, the thermal conductivity value has improved by up to 27% and 14.4% for medium and high concentration respectively. Nanofluids with medium concentration of ZnO, has the highest enhancement in insulating and cooling properties for both palm oil and PFAE-based nanofluids. This observation is supported by the kinematic viscosity value of the mentioned nanofluid.

show abstract

Section: Thermal Conductivity Of Nanofluidssupporting

confidence: 93%

Experimental Investigation on Thermal Conductivity of Palm Oil and Zinc Oxide PFAE-based Nanofluids

Nurin Ainanie Azizie,

Nuriziani Hussin,

Hana Abdull Halim

et al. 2023

ARFMTS

View full text Add to dashboard Cite

show abstract

“…mixed convection heat transfer from Al2O3-water nanofluid in W-shaped, copper tube cause the rate of heat transfer coefficient improved with Reynolds number for average wall temperatures of 50 and 60ºC. Magneto hydrodynamic nanofluid flow between two parallel analyzed and results showed concentration of nanofluid diminishes when Brownian movement increments whereas it increases with expands of thermophoretic parameter [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Gupta et al [21] examined magneto convection in a nanofluid.…”

Section: Introductionmentioning

confidence: 97%

The application of analytical methods in the investigation effects of Magnetic parameter and Brownian motion on the fluid flow between two equal plates

Pasha

Nabi

Peiravi

et al. 2021

IJE

View full text Add to dashboard Cite

“…The two inhibiting factors for maximum power transfer and reducing the size of the transformer are the thermal and insulating properties of the oil [12]. The thermal conductivity of the oil in the transformer is usually not high, which weakens its cooling performance and ultimately reduces the life of the transformer [13,14]. In addition, transformer operation and the aging of the oil, the breakdown voltage (BDV) is significantly reduced.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis and Physical Mechanism Investigation of Al2O3 Effect on New and Aged Transformer Oil Properties

Mashhadzadeh

Seyyedbarzegar

Samani

2023

IJE

View full text Add to dashboard Cite

Al2O3 nanoparticles were used to improve the performance of the vital properties of transformer oil (TO) under normal operating conditions and when subjected to thermal aging. Different weight percentages of Al2O3 in the TO were considered to maximize the breakdown voltage (BDV). Al2O3 nanofluid (NF) increases the BDV by 116% (31.1 kV to 67.4 kV) and the heat transfer by 33.4%, and also minimizes partial discharge (PD) by 66%. The reduction of PD is also related to the ability of Al2O3 to adsorb hydrogen and acetylene, two oil-soluble gases that are effective in PD. Even Al2O3NF was more resistant to water content in TO. BDV for TO and Al2O3NF, when water content increased to more than 30 ppm, were reduced by 57% and 19%, respectively. According to Arrhenius equation, both samples were placed at 120°C for 29 days to age samples (equivalent to about 30 years). Aged Al2O3NF has continued its exceptional performance and improved BDV by 121% compared to aged TO, and also Al2O3NF showed its capacity well and improved PD compared to aged TO by 71%. All the favorable properties of Al2O3NF are conditional on the stability of Al2O3. FESEM confirms the stability of Al2O3.

show abstract

An Investigation on Stability, Electrical and Thermal Characteristics of Transformer Insulting Oil Nanofluids

Cited by 7 publications

References 0 publications

Experimental Investigation on Thermal Conductivity of Palm Oil and Zinc Oxide PFAE-based Nanofluids

Experimental Investigation on Thermal Conductivity of Palm Oil and Zinc Oxide PFAE-based Nanofluids

The application of analytical methods in the investigation effects of Magnetic parameter and Brownian motion on the fluid flow between two equal plates

Experimental Analysis and Physical Mechanism Investigation of Al2O3 Effect on New and Aged Transformer Oil Properties

Contact Info

Product

Resources

About