Thermal Modelling of Mineral Oil and Natural Ester Nanofluids

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI:10.1109/CEIDP50766.2021.9705360

Joyce Jacob, B. V. Kumar, P. Preetha, T. Sindhu

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Abstract

The operating life and efficiency of a transformer depends on the electrical and thermal performance of its insulation system. The present work involves the preparation and thermal characterization of mineral oil and natural ester nanofluids. An electro-thermal analogous model is developed to determine the thermal resistance and thermal capacitance of the unfilled and nanofilled oils. Simulation model of unfilled and nanofilled oils using Comsol Multphysics is developed to obtain the temperature time plot, from which the values of the thermal resistance and thermal capacitance of the unfilled and nanofilled oils are calculated. The simulation results are validated experimentally. It is observed that the thermal resistance and thermal capacitance values of both mineral oil and natural ester obtained from simulation and experiment decrease with the addition of nanoparticles. This indicates an improvement in the heat distribution and dissipation in nanofluids when compared to the unfilled counterparts, rendering them better insulating oils for transformers.

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矿物油和天然酯纳米流体的热模拟

变压器的工作寿命和效率取决于其绝缘系统的电气和热性能。目前的工作涉及矿物油和天然酯纳米流体的制备和热表征。建立了电-热模拟模型来确定未填充油和纳米填充油的热阻和热电容。利用Comsol multiphysics软件建立了未填充油和纳米填充油的模拟模型，得到了温度时间图，计算了未填充油和纳米填充油的热阻和热电容值。仿真结果得到了实验验证。通过模拟和实验得到矿物油和天然酯的热阻和热电容值随着纳米粒子的加入而降低。这表明，与未填充的纳米流体相比，纳米流体中的热分布和耗散有所改善，使其成为更好的变压器绝缘油。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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