eprintid: 20469 rev_number: 3 eprint_status: archive userid: 1 dir: disk0/00/02/04/69 datestamp: 2026-01-29 06:28:30 lastmod: 2026-01-29 06:28:30 status_changed: 2026-01-29 06:28:30 type: article metadata_visibility: show creators_name: Deraman, Muhammad Nazori creators_name: Bakar, Norazhar Abu creators_name: Aziz, Nur Hakimah Ab creators_name: Chairul, Imran Sutan creators_name: Ghani, Sharin Ab title: The experimental study on the potential of waste cooking oil as a new transformer insulating oil ispublished: pub note: Cited by: 14; All Open Access, Bronze Open Access abstract: Power transformers use mineral oil as an insulating liquid due to its outstanding dielectric properties. The poor biodegradability and toxicity of mineral oil have increased the interest in the use of a more environmentally friendly product such as ester-based oil. Generally, natural ester insulating oils (NEI) have a higher flash point and breakdown voltage compared to existing mineral oils. However, the higher price of NEI is the main obstacle to widely applied in power transformers. Therefore, alternative cheaper feedstock processing is required. This paper proposed waste cooking oil (WCO) as a potential alternative to the existing transformer insulating oil. The used of WCO promotes the optimal consumption of plant-based resources and more efficient waste management. Transesterification method is performed to remove the free fatty acids in the WCO and reduce the viscosity. The transesterification process is based on the chemical modification reaction between WCO, methyl alcohol (methanol) and sodium hydroxide (NaOH) catalyst lye that produces waste cooking oil methyl ester (WCOME). Chemical and electrical properties i.e. water content, acidity and breakdown voltage of the developed WCOME are compared with the existing WCO according to IEEE Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers (IEEE C57.147). © 2020 PENERBIT AKADEMIA BARU. date: 2020 publisher: Penerbit Akademia Baru official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086862833&doi=10.37934%2fARFMTS.69.1.7484&partnerID=40&md5=d7b62ff0c450f0697c323494240db9a4 id_number: 10.37934/ARFMTS.69.1.7484 full_text_status: none publication: Journal of Advanced Research in Fluid Mechanics and Thermal Sciences volume: 69 number: 1 pagerange: 74 – 84 refereed: TRUE issn: 22897879 citation: Deraman, Muhammad Nazori and Bakar, Norazhar Abu and Aziz, Nur Hakimah Ab and Chairul, Imran Sutan and Ghani, Sharin Ab (2020) The experimental study on the potential of waste cooking oil as a new transformer insulating oil. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 69 (1). 74 – 84. ISSN 22897879