Electro-thermal and mechanical aspects of thermally aged cellulose insulation impregnated with nanofluids

被引：7
|
作者：
Jacob, Joyce [1 ,2 ]
Preetha, P. [1 ]
Sindhu, T. K. [1 ]
Rao, U. Mohan [3 ]
机构：
[1] Natl Inst Technol Calicut, Dept Elect Engn, Calicut, India
[2] Muthoot Inst Technol & Sci, Dept Elect & Elect Engn, Calicut, India
[3] Univ Quebec Chicoutimi, Dept Appl Sci, Chicoutimi, PQ 721, Canada
来源：
MEASUREMENT | 2023年 / 209卷
关键词：
Transformer; Nanofluid; Insulating liquid; Mineral oil; Natural ester; AC BREAKDOWN VOLTAGE; NATURAL ESTER; PAPER;
D O I：
10.1016/j.measurement.2023.112506
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Natural ester nanofluids offer improved dielectric and thermal properties than non-biodegradable mineral oil. In the present work, cellulose samples impregnated with unfilled and nanofilled mineral oil and ester are subjected to thermal aging at 130 degrees C for 168, 336, 504, and 1200 h under open beaker conditions. After 1200 h of thermal stress, the AC breakdown voltage, thermal conductivity, and tensile strength of natural ester impregnated cellulose is 36.13%, 0.46%, and 1.09 times higher than that of mineral oil impregnated cellulose samples, respectively. Also, the AC Breakdown voltage, thermal conductivity, and tensile strength of 0.02 wt% natural ester nanofluid impregnated cellulose is 37.81%, 1.7%, and 1.1 times higher than that of cellulose impregnated with 0.02 wt% mineral oil nanofluid, respectively. The present measurements demonstrate an improvement in the solid insulation performance with natural ester nanofluids, suggesting a possibility of extended service life of solid insulation in liquid filled high voltage transformers.
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页数：8
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