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International Journal of Engineering، جلد ۲۹، شماره ۱۰، صفحات ۱۳۳۲-۱۳۴۰
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عنوان انگلیسی An Investigation on Stability, Electrical and Thermal Characteristics of Transformer Insulting Oil Nanofluids
چکیده انگلیسی مقاله Transformer insulating oil nanofluid is made to improve dielectric and thermal properties of the oil by employing nanoparticles with proper properties. In the current work, nanofluids based on transformer mineral oil were prepared by three procedures using diamond nanoparticles with high thermal conductivity, as well as high dielectric properties. It was tried to consider the impacts of surfactants’ presence and ball milling process in the preparation procedures. The effects of a variety of stabilizers (the amount and type) and also the ultrasonic time on diamond nanoparticles’ stability in the oil were investigated and optimized experimentally. Using the optimized nanofluids, thermal conductivity and viscosity of the oil nanofluids were compared and discussed. In addition, the consistency of the thermal conductivity results with Maxwell and also Hamilton and Crosser theoretical models was examined. It was revealed that, the nanofluid preparation procedure, temperature and nanoparticles’ concentration have effects on thermal conductivity of the transformer oil nanofluid, while the presence of the nanoparticles has a slight impact on the viscosity of the fluid. Also the effect of diamond nanoparticles’ presence on the electrical properties of transformer oil was studied. Based on the experimental results, adding diamond nanoparticles could lead to an increase in the transformer oil breakdown voltage, while it has nearly no effect on dielectric loss in low concentrations.
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نویسندگان مقاله Mehdi Akbari |
chem eng, ACER, University of Tehran

Mahdieh Yavari |
chem eng, ACER, University of Tehran

Nasrin Nemati |
chem eng, Shiraz University

Jaber Babaee Darband |
chem eng, ACER, University of Tehran

Hoda Molavi |
chemistry and materials, Niroo research institute

Monireh Asefi |
chem eng, University of Tehran

نشانی اینترنتی http://www.ije.ir/article_72801_3f3810263a24e39396054ac07c1a2b47.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/409/article-409-2062218.pdf
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زبان مقاله منتشر شده en
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