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Volume 13
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Article

Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids

by
Grzegorz Dombek
1,*,
Zbigniew Nadolny
1,
Piotr Przybylek
1,
Radoslaw Lopatkiewicz
2,
Agnieszka Marcinkowska
3,
Lukasz Druzynski
1,
Tomasz Boczar
4 and
Andrzej Tomczewski
5
1
Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland
2
Power Engineering Transformatory Sp. z o.o., 62-004 Czerwonak, Poland
3
Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 3, 60-965 Poznan, Poland
4
Institute of Electric Power Engineering and Renewable Energy, Opole University of Technology, Proszkowska 76, 45-758 Opole, Poland
5
Institute of Electrical Engineering and Electronics, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, Poland
*
Author to whom correspondence should be addressed.
Energies 2020, 13(17), 4433; https://doi.org/10.3390/en13174433
Submission received: 6 July 2020 / Revised: 24 August 2020 / Accepted: 26 August 2020 / Published: 27 August 2020
(This article belongs to the Special Issue High Voltage Insulating Materials-Current State and Prospects)
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Abstract

This paper presents the effect of the impact of moisture in paper insulation used as insulation of transformer windings on its thermal conductivity. Various types of paper (cellulose and aramid) and impregnated (mineral oil, synthetic ester, and natural ester) were tested. The impact of paper and impregnated types on the changes in thermal conductivity of paper insulation caused by an increase in moisture were analyzed. A linear equation, describing the changes in thermal conductivity due to moisture, for various types of paper and impregnated, was developed. The results of measuring the thermal conductivity of paper insulation depending on the temperature are presented. The aim of the study is to develop an experimental database to better understand the heat transport inside transformers to assess aging and optimize their performance.
Keywords: aramid paper; cellulose; dielectric materials; insulation system; mineral oil; moisture; natural ester; synthetic ester; thermal conductivity; transformers aramid paper; cellulose; dielectric materials; insulation system; mineral oil; moisture; natural ester; synthetic ester; thermal conductivity; transformers

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MDPI and ACS Style

Dombek, G.; Nadolny, Z.; Przybylek, P.; Lopatkiewicz, R.; Marcinkowska, A.; Druzynski, L.; Boczar, T.; Tomczewski, A. Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids. Energies 2020, 13, 4433. https://doi.org/10.3390/en13174433

AMA Style

Dombek G, Nadolny Z, Przybylek P, Lopatkiewicz R, Marcinkowska A, Druzynski L, Boczar T, Tomczewski A. Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids. Energies. 2020; 13(17):4433. https://doi.org/10.3390/en13174433

Chicago/Turabian Style

Dombek, Grzegorz, Zbigniew Nadolny, Piotr Przybylek, Radoslaw Lopatkiewicz, Agnieszka Marcinkowska, Lukasz Druzynski, Tomasz Boczar, and Andrzej Tomczewski. 2020. "Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids" Energies 13, no. 17: 4433. https://doi.org/10.3390/en13174433

APA Style

Dombek, G., Nadolny, Z., Przybylek, P., Lopatkiewicz, R., Marcinkowska, A., Druzynski, L., Boczar, T., & Tomczewski, A. (2020). Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids. Energies, 13(17), 4433. https://doi.org/10.3390/en13174433

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