NDLI: Multiple nanoparticles for improvement of thermal and dielectric properties of oil nanofluids

Content Provider	IET Digital Library
Author	Mansour, Diaa Eldin A. Shaalan, Essam M. Ward, Sayed A. Dein, Adel Z. El Karaman, Hesham S. Ahmed, Hanaa M.
Abstract	To improve the performance and increase the lifetime of oil-filled transformers, the thermal and dielectric properties of the transformer oil should be enhanced. Recently, nanotechnology was used as an effective science in the field of transformer oil development. In this study, barium titanate (BT) nanoparticles were inserted into the base transformer oil by a concentration of 0.005 g/L as an individual nanofluid sample (INFS). This insertion enhances the heat transfer coefficient by 33% but the breakdown voltage (BDV) was decreased by >10%. To overcome this problem of dielectric properties degradation, other three hybrid nanofluid samples (HNFS) were prepared using three different types of metal oxide (MO) nanoparticles; titania, alumina, and silica. These samples were prepared by adding a concentration 0.01 g/L of MO nanoparticles together with 0.005 g/L of BT nanoparticles into the oil. The thermal and dielectric properties of HNFS were measured to study the behaviour of nanoparticles hybridisation on transformer oil properties. HNFS using titania nanoparticles provided the best composition regarding either BDV or heat transfer coefficient. Dynamic light scattering (DLS) technique was used to evaluate the particle size distribution of hybrid nanoparticles and to clarify the corresponding physical mechanisms behind the obtained enhancement.
Starting Page	968
Ending Page	974
Page Count	7
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 7, Sep (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5015
Journal	IET Science, Measurement & Technology
Publisher Date	2019-04-12
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Al2O3 Alumina Barium Compound Barium Titanate Nanoparticles BaTiO3 Breakdown Voltage BT Nanoparticles Dielectric Breakdown And Discharges Dielectric Property Dielectric Property Degradation Dynamic Light Scattering Electric Breakdown Heat Transfer Heat Transfer Coefficient HNFS Hybrid Nanofluids Sample Hybrid NanoParticle Light Scattering Metal Oxide NanoParticle Multiple NanoParticle Nanoparticle NanoParticle Hybridisation Oil Nanofluids Oil-filled Transformer Organic Insulation Particle Size Particle Size Distribution Power Transformer Insulation Silica SiO2 Thermal Property TiO2 Titania NanoParticle Titanium Compound Transformer And Reactors Transformer Oil Transformer Oil Development Transformer Oil Property
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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