热老化酯基TiO2纳米流体中添加活化膨润土对保温性能的影响

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2021-03-07 DOI:10.1049/nde2.12010
A. J. Amalanathan, N. Harid, H. Griffiths, R. Sarathi
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引用次数: 7

摘要

作者报告了一项实验研究的关键发现,该研究探索了使用活化膨润土回收热老化的酯基变压器纳米流体,以提高其绝缘性能。经酸处理后的膨润土比表面积和孔体积比处理前的膨润土样品有所增加,从而提高了吸附能力。进行了物理化学诊断研究,以表征活化的膨润土。采用旋转盘法测定电流起电电流,并通过测量各流体样品的电晕起始电压和击穿电压来评价再生天然酯和纳米填充酯流体样品的绝缘性能。结果表明,由于碳颗粒对活化膨润土的吸引力,回收工艺提高了碱酯流体样品的电晕起始电压、耗散因子和击穿电压,但由于双电层的损耗,纳米流体样品的电晕起始电压和击穿电压没有显著变化。经活化膨润土处理后,酯和酯纳米流体的流动通电电流降低,可能是由于铜和膨润土之间的相互作用改变了负责电荷分离的双层形成。
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Impact of adding activated bentonite to thermally aged ester-based TiO2 nanofluids on insulation performance

The authors report the key findings from an experimental study that explored the use of activated bentonite for the reclamation of thermally aged ester-based transformer nanofluids to improve their insulation performance. Bentonite activated with acid treatment caused an increase in the specific surface area and pore volume of bentonite compared to the bentonite sample before treatment, thus imparting an improved adsorption capability. Physico-chemical diagnostic studies were carried out to characterise the activated bentonite. The insulation performance of the reclaimed natural ester and nano-filled ester fluid samples was assessed by measuring the corona inception voltage and breakdown voltage of each fluid sample, apart form measuring the flow electrification current using the spinning disk method. The results revealed that the reclamation process improved the corona inception voltage, dissipation factor and the breakdown voltage of the base ester fluid sample due to attraction of carbon particles to activated bentonite, but no significant variation was observed with nanofluids due to the depletion of the electrical double layer. The flow electrification current of ester and ester nanofluids reduced after treatment with activated bentonite, may be attributed to the interaction between copper and bentonite that alters the double layer formation responsible for the separation of charges.

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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
期刊最新文献
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