Dielectric Performance of Magneto-Nanofluids for Advancing Oil-Immersed Power Transformer

Hussain, Rashid; Khan, Qasim; Khan, Asfar Ali; Refaat, Shady S.; Abu‐Rub, Haitham

doi:10.1109/access.2020.3021003

Cited by 27 publications

(17 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hussain et al [122] prepared nanofluids made of NE and SE with Fe 3 O 4 nanoparticles of size ranging from 50 to 100 nm. AC-BDV was measured with two electrode systems, mushroom-mushroom (M-M) and sphere-sphere (S-S).…”

Section: Other Thermophysical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric Fluids for Power Transformers with Special Emphasis on Biodegradable Nanofluids

2021

View full text Add to dashboard Cite

This review is focused on the research of dielectric fluids, especially commonly used power transformer oils enhanced by nanoparticles, i.e., nanofluids. There are differences between various combinations of base fluids and nanoparticles prepared in different ways. The main goal of this review was to present recent research in this field sorted by the used nanoparticles. Nanofluids based on mineral oils, natural, or synthetic esters were investigated in terms of the nature of nanoparticles, particularly Al2O3, TiO2, Fe2O3, Fe3O4, graphene, fullerene, and others. The combinations of environmentally friendly oils and nanoparticles were presented. Finally, the article focused on the description of current dielectric fluids usable in power transformers and the possibilities of improving new and existing fluids with nanoparticles, especially their physical, dielectric, and chemical properties, but with regard to environmental aspects.

show abstract

Section: Other Thermophysical Propertiesmentioning

confidence: 99%

“…Hussain et al in the reported study [122] also examined iron phosphide (Fe 3 P) and cobalt (Co 3 O 4 ) nanoparticles mixed with NE and SE. AC-BDV enhancement of NE with Fe 3 P nanoparticles was 19.3% at a concentration 0.004 wt% (M-M electrode system) and 33.5% at the same concentration (S-S electrode system).…”

Section: Other Nanoparticlesmentioning

confidence: 99%

Dielectric Fluids for Power Transformers with Special Emphasis on Biodegradable Nanofluids

2021

View full text Add to dashboard Cite

show abstract

“…They observed a correlation between the size of NPs and dielectric strength; the smallest NPs give the best improvement on AC BDV. Hussain et al [12] studied the effect of the addition of three NPs (iron oxide ''Fe 3 O 4 '', cobalt oxide ''Co 3 O 4 '', and iron phosphide ''Fe 3 P'') on the insulation performances of synthetic ester and natural ester (NE)-based nanofluids. All the NFs show enhancements in the dielectric strength.…”

Section: Introductionmentioning

confidence: 99%

AC Breakdown Voltage and Partial Discharge Activity in Synthetic Ester-Based Fullerene and Graphene Nanofluids

2022

View full text Add to dashboard Cite

This paper deals with the study of the AC breakdown voltage (BDV) and partial discharges (PDs) activity of synthetic ester-based nanofluids (NF) with two kinds of carbonic nanoparticles (NPs), namely graphene (Gr) and fullerene (C 60 ); the synthetic ester (SE) being Midel 7131. The BDV measurement was achieved at various concentrations of NPs and different electrodes gap distances, while the partial discharges activity was studied only at the optimal concentration that gave the best improvements of BDV. First, a detailed improved procedure for preparing our NFs is presented. Then, the zeta potential measurements are performed on these NFs, and their stability is checked. After the preparation and characterization of samples, the BDVs and PDs parameters are measured according to IEC 60156 (modified gap distance) and IEC 60270 standards, respectively. Finally, conformity of the experimental data with Normal and Weibull distributions is examined, and the BDV at cumulative probabilities of 1% and 50% are then deduced. It is shown that BDV outcomes for all studied liquids obey both Normal and Weibull distributions, and the BDVs at cumulative probabilities of 1% and 50% are improved. Moreover, adding Gr and C 60 nanoparticles at different concentrations enhances the BDV values for investigated electrode gaps (0.1 to 2.0mm). The best improvement is obtained with a concentration of 0.4 g/L for 0.5mm and 0.7mm electrode gap with fullerene and Graphene nanoparticles, respectively. For a 2mm gap distance, the best improvements are of about 12.67% and 16.64% with 0.4g/L of C 60 and 0.3 g/L of Gr, respectively. It is also shown that the addition of C 60 significantly reduces the activity of partial discharges compared to pure SE, while the addition of Gr destroys the partial discharges resistance of pure SE.

show abstract

“…Several models have been proposed to calculate the relative permittivity of these composite fluids. In this regard, the Maxwell-Garnett model was widely used in the description and measurement of the relative permittivity of DNFs [12], but this model is not considered being sufficient since it is just a function of the concentration and relative permittivities of the constituents. As a result, a model was constructed in [13] based on S-parameter retrieval and considering the scattering of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, a proposed model based on NP polarization was proposed to investigate the relative permittivity of composite fluids [14], and could exhibit more closer results to the experimental ones. However, all these models [12]- [14] did not consider the surfactant polarization. NPs are generally anti-lipophilic and have a tendency to aggregate when they embedded in nanofluids.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Interfacial Zone Due to Nanoparticle–Surfactant Interaction on Dielectric Properties of Vegetable Oil Based Nanofluids

et al. 2021

View full text Add to dashboard Cite

Nanoparticles are generally anti-lipophilic and have a tendency to aggregate when they embedded in nanofluids. Thus, surfactants have a major role in achieving long term dispersion stability of nanofluids through surface modification of nanoparticles. However, the surfactant changes the structure of the interfacial zone around nanoparticles and can have a crucial impact on the dielectric properties of dielectric nanofluids. Accordingly, this paper aims to clarify the role of interfacial zone on dielectric properties of vegetable oil based Al2O3 nanofluids including relative permittivity, dissipation factor, and AC breakdown voltage. Moreover, a polarization model of nanofluids was proposed to calculate their relative permittivity considering surfactant effect. Different filler levels ranging from 0.01 wt% to 0.05 wt% were used and various temperatures ranges were considered to validate the proposed model. Relative permittivity calculated from the proposed model was almost in line with experimental results. Proposed model depicted that surfactant contributes for orientational polarization of nanoparticles in the relative permittivity calculation. So, improvement in the relative permittivity of dielectric nanofluids has been attained from 0.01 wt% to 0.05 wt% of Al2O3 nanoparticles due to both internal and orientational polarization of nanoparticles. Regarding dissipation factor of prepared nanofluids, it decreased against the weight percentage of nanoparticles, while the mean AC breakdown voltage increased against the weight percentage. All these effects were discussed considering the structure of interfacial zone and its impact on the alignment of oil chains and the energy loss of electrons. INDEX TERMSAl2O3 Nanoparticles; Surfactant; Relative permittivity model; Nanofluids; Dielectric properties. NOMENCLATURE 2a Diameter of spherical nanoparticle TBHQ Tertiary Butylhydroquinone CSO Cottonseed oil V Volume of each nanoparticle d Surfactant thickness α1 Polarizability of a base oil molecule DBF Dielectric base fluid α2 Inner polarizability of NPs DNF Dielectric nanofluid α3 Orientational polarizability of per NP molecule. dQ Charge on nanoparticle's small volume ε0 Permittivity of vacuum

show abstract

Dielectric Performance of Magneto-Nanofluids for Advancing Oil-Immersed Power Transformer

Cited by 27 publications

References 40 publications

Dielectric Fluids for Power Transformers with Special Emphasis on Biodegradable Nanofluids

Dielectric Fluids for Power Transformers with Special Emphasis on Biodegradable Nanofluids

AC Breakdown Voltage and Partial Discharge Activity in Synthetic Ester-Based Fullerene and Graphene Nanofluids

The Effect of Interfacial Zone Due to Nanoparticle–Surfactant Interaction on Dielectric Properties of Vegetable Oil Based Nanofluids

Contact Info

Product

Resources

About