Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers

The paradigm shift from non-biodegradable and non-renewable mineral oil to acceptable biodegradable, renewable, and safer alternatives has prominently emerged in response to the United Nations Sustainable Development Goal (SDG)-7. However, their high viscosity, low dielectric strength, and poor oxid...

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Main Author:	Sharifah Masniah, Wan Masra
Format:	Thesis
Language:	English English English
Published:	2024
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://ir.unimas.my/id/eprint/45076/3/DSVA_SharifahMasniahWM.pdf http://ir.unimas.my/id/eprint/45076/4/Thesis%20PhD_SharifahMasniahWanMasr.ftext.pdf http://ir.unimas.my/id/eprint/45076/5/Thesis%20PhD_SharifahMasniahWanMasr%20-%2024%20pages.pdf
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spelling	my-unimas-ir.450762024-07-01T02:44:57Z Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers 2024-06-28 Sharifah Masniah, Wan Masra TK Electrical engineering. Electronics Nuclear engineering The paradigm shift from non-biodegradable and non-renewable mineral oil to acceptable biodegradable, renewable, and safer alternatives has prominently emerged in response to the United Nations Sustainable Development Goal (SDG)-7. However, their high viscosity, low dielectric strength, and poor oxidation stability prevent the broader usage as a replacement for dielectric liquid in transformers. Driven by the need for elevated properties of vegetable oils to align with the industry standards, the conversion process of the triglycerides, combined with modifications through the addition of nanoparticles and a surfactant, has been investigated. This thesis proposes enhancing the properties of refined, bleached, and deodorised palm oil olein (RBDPOo) through chemical modification using a transesterification process to produce palm oil methyl ester (POME) as the base fluid. Additionally, semiconductive titanium dioxide (TiO2) and conductive multi-walled carbon nanotube (MWCNT) nanoparticles, along with the hexadecyltrimethylammonium bromide (CTAB) surfactant, are added. Accelerated ageing experiments were conducted in a sealed condition at a temperature of 130 oC over a duration ranging from 0 to 1000 h for 0.01−0.10-g/L concentrations to understand their degradation behaviour. Overall, the findings demonstrated that all POME-based nanofluids showed an increase in AC BDV during the accelerated thermal ageing study, with the highest average value recorded at 57.08 kV, indicating a remarkable increment of 157.7% for POME-based TiO2 nanofluid at a concentration of 0.05-g/L. After being subjected to accelerated thermal ageing, the BDV of POME-based TiO2 nanofluids revealed a consistent trend across various doping concentrations. It was demonstrated that the proposed POME-based nanofluids performed comparably with other types of methyl ester oils in terms of breakdown voltage, kinematic viscosity, and flash point. UNIMAS 2024-06 Thesis http://ir.unimas.my/id/eprint/45076/ http://ir.unimas.my/id/eprint/45076/3/DSVA_SharifahMasniahWM.pdf text en staffonly http://ir.unimas.my/id/eprint/45076/4/Thesis%20PhD_SharifahMasniahWanMasr.ftext.pdf text en validuser http://ir.unimas.my/id/eprint/45076/5/Thesis%20PhD_SharifahMasniahWanMasr%20-%2024%20pages.pdf text en public phd doctoral UNIMAS Electrical and Electronic Engineering
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English English English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Sharifah Masniah, Wan Masra Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers
description	The paradigm shift from non-biodegradable and non-renewable mineral oil to acceptable biodegradable, renewable, and safer alternatives has prominently emerged in response to the United Nations Sustainable Development Goal (SDG)-7. However, their high viscosity, low dielectric strength, and poor oxidation stability prevent the broader usage as a replacement for dielectric liquid in transformers. Driven by the need for elevated properties of vegetable oils to align with the industry standards, the conversion process of the triglycerides, combined with modifications through the addition of nanoparticles and a surfactant, has been investigated. This thesis proposes enhancing the properties of refined, bleached, and deodorised palm oil olein (RBDPOo) through chemical modification using a transesterification process to produce palm oil methyl ester (POME) as the base fluid. Additionally, semiconductive titanium dioxide (TiO2) and conductive multi-walled carbon nanotube (MWCNT) nanoparticles, along with the hexadecyltrimethylammonium bromide (CTAB) surfactant, are added. Accelerated ageing experiments were conducted in a sealed condition at a temperature of 130 oC over a duration ranging from 0 to 1000 h for 0.01−0.10-g/L concentrations to understand their degradation behaviour. Overall, the findings demonstrated that all POME-based nanofluids showed an increase in AC BDV during the accelerated thermal ageing study, with the highest average value recorded at 57.08 kV, indicating a remarkable increment of 157.7% for POME-based TiO2 nanofluid at a concentration of 0.05-g/L. After being subjected to accelerated thermal ageing, the BDV of POME-based TiO2 nanofluids revealed a consistent trend across various doping concentrations. It was demonstrated that the proposed POME-based nanofluids performed comparably with other types of methyl ester oils in terms of breakdown voltage, kinematic viscosity, and flash point.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Sharifah Masniah, Wan Masra
author_facet	Sharifah Masniah, Wan Masra
author_sort	Sharifah Masniah, Wan Masra
title	Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers
title_short	Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers
title_full	Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers
title_fullStr	Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers
title_full_unstemmed	Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers
title_sort	accelerated thermal ageing on electrical and physicochemical performance of palm oil methyl ester-based nanofluids as liquid insulation in transformers
granting_institution	UNIMAS
granting_department	Electrical and Electronic Engineering
publishDate	2024
url	http://ir.unimas.my/id/eprint/45076/3/DSVA_SharifahMasniahWM.pdf http://ir.unimas.my/id/eprint/45076/4/Thesis%20PhD_SharifahMasniahWanMasr.ftext.pdf http://ir.unimas.my/id/eprint/45076/5/Thesis%20PhD_SharifahMasniahWanMasr%20-%2024%20pages.pdf
_version_	1804888438400352256

Accelerated Thermal Ageing on Electrical and Physicochemical Performance of Palm Oil Methyl Ester-Based Nanofluids as Liquid Insulation in Transformers

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