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

Grzegorz Dombek, Zbigniew Nadolny, Piotr Przybylek, Radoslaw Lopatkiewicz, Agnieszka Marcinkowska, Lukasz Druzynski, Tomasz Boczar and Andrzej Tomczewski
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Grzegorz Dombek: Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Zbigniew Nadolny: Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Piotr Przybylek: Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Radoslaw Lopatkiewicz: Power Engineering Transformatory Sp. z o.o., 62-004 Czerwonak, Poland
Agnieszka Marcinkowska: Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 3, 60-965 Poznan, Poland
Lukasz Druzynski: Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Tomasz Boczar: Institute of Electric Power Engineering and Renewable Energy, Opole University of Technology, Proszkowska 76, 45-758 Opole, Poland
Andrzej Tomczewski: Institute of Electrical Engineering and Electronics, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, Poland

Energies, 2020, vol. 13, issue 17, 1-17

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 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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