Open AccessNanofluid‐based transformer oil: effect of ageing on thermal, electrical and physicochemical properties
Author(s) -
Maharana Mrutyunjay,
Bordeori Moon Moon,
Nayak Sisir Kumar,
Sahoo Niranjan
Publication year - 2018
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2017.0475
Subject(s) - nanofluid , materials science , transformer oil , composite material , thermal conductivity , boron nitride , chemical engineering , transformer , nanoparticle , nanotechnology , voltage , electrical engineering , engineering
The development of nanofluids is necessary to replace the conventional transformer oil used in power and distribution transformers. A stable nanofluid has been prepared to verify its insulating and heat transfer performance in oxidative ageing environment. Due to the superior thermal and electrical properties of a nanoparticle (NP), its dispersion in mineral oil (MO) is expected to improve the dielectric and cooling properties of the nanofluid. This study presents a comparative assessment of the pre‐ and post‐ageing effects on MO and nanofluids. An open beaker, single temperature oxidative thermal ageing experiment is performed at 115°C for different ageing times, i.e. 164, 328, and 492 h. A concentration of 0.01 wt% of NP for both titanium oxide and exfoliated hexagonal boron nitride (Eh‐BN) is dispersed into a base fluid, i.e. MO, to prepare nanofluids. The important thermal, electrical and physicochemical properties of all the three insulating oils are analysed. The superior thermal, electrical and physicochemical performance of Eh‐BN/MO‐nanofluid is observed to be superior. Higher thermal conductivity, insulation and hydrophobic Eh‐BN NPs on dispersion with MO provide better cooling and insulation even after an ageing, thus confirm its usability as a novel nanofluid‐based transformer oil.