Flow Investigation of natural convection in power transformer with nano-oil using lattice Boltzmann method
Publish place: The 32nd annual international conference of the Iranian Society of Mechanical Engineers
Publish Year: 1403
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME32_388
تاریخ نمایه سازی: 15 تیر 1403
Abstract:
Improving the transformer oil's thermal performance is necessary since transformers are essential in power distribution networks and besides, the transformer core's temperature has an impact on how well it functions electrically. In this study, by presenting a two-dimensional model of a transformer, the natural convection heat transfer of one nano-oil sample, including Al۲O۳ nanoparticle in base fluid of Naphthenic oil has been investigated theoretically and simulated by the lattice Boltzmann method and D۲Q۹ model. Modelling and solving were done for nanoparticle volume fractions of ۰% to ۵% and Rayleigh numbers of ۱۰۳ to ۱۰۵. Flow lines and Nusselt number average are given in this range. Based on the results of this research, adding nanoparticle to the base fluid has improved the cooling operation of the transformer core. Also, increasing the volume fraction of nanoparticles and the Rayleigh number increased the natural convection heat transfer. Naphthenic-Al۲O۳ nano-oil, at a volume fraction of ۵% and Rayleigh number of ۱۰۵, has the highest Nusselt number average of ۱۳.۰۶ and the heat transfer compared to pure Naphthenic oil under the same conditions has improved.
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Authors
Alireza Rahimi
Faculty of Energy, University of Kashan, Kashan, Iran
Mohammad Saeed Saeedinik
۲Faculty of Energy, University of Kashan, Kashan, Iran