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Morteza Ghorbanzadeh Ahangari

Morteza Ghorbanzadeh Ahangari

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Faculty of Technology and Engineering
Address:
Phone: 35305107

Research

Title
Experiment and theory for acetylene adsorption in transformer oil
Type
JournalPaper
Keywords
Transformer oil, Partial discharge, Acetylene Density, functional theory, Nanoparticles
Year
2021
Journal Journal of molecular structure
DOI
Researchers Amir Hamed Mashhadzadeh ، Mahmood Ghanbari ، Amangaldi Koochaki ، Seyyedmeysam Seyyedbarzegar ، Morteza Ghorbanzadeh Ahangari

Abstract

A series of nanofluids were prepared by incorporating titanium dioxide (TiO 2 ), carbon nanotube (CNTs) and zinc oxide (ZnO) into transformer oils to eliminate acetylene (C 2 H 2 ) bubbles, and elimination of the partial discharge (PD). The adsorption of C 2 H 2 molecules onto three model nanoparticles (TiO 2 , CNTs and ZnO) were simulated based on density functional theory (DFT) calculations, and then compared with ex- perimental data. Theoretically, TiO 2 showed the highest capacity for adsorbing C 2 H 2 molecules among the studied nanoparticles, as featured by a high adsorption energy (3.61 eV), high charge transfer (1.34 eV), and low equilibrium distance between TiO 2 and C 2 H 2 (2.55 ˚A). The maximum breakdown voltage was obtained at optimum CNTs, ZnO and TiO 2 contents of 0.01, 0.01, and 0.075 wt.%, respectively. Experimen- tal results confirmed theoretical calculations; so that TiO 2 had the highest efficiency of C 2 H 2 adsorption (71%), while ZnO and CNTs could adsorb acetylene by 64% and 17%, respectively. Moreover, CNTs and ZnO unenviably decreased the breakdown voltage by 77% and 27%, respectively, while TiO 2 increased it by 13%. Therefore, TiO 2 -based nanofluids not merely decreased the adverse effects of PD, but also improved the electrical properties of the transformer oil.