The Use of Methanol Vapour for Effective Drying of Cellulose Insulation

Piotr Przybylek () and Jaroslaw Gielniak
Additional contact information
Piotr Przybylek: Institute of Electric Power Engineering, Faculty of Environmental Engineering and Energy, Poznan University of Technology, 60-965 Poznan, Poland
Jaroslaw Gielniak: Institute of Electric Power Engineering, Faculty of Environmental Engineering and Energy, Poznan University of Technology, 60-965 Poznan, Poland

Energies, 2023, vol. 16, issue 11, 1-11

Abstract: The paper deals with a new method of drying cellulose insulation, which uses methanol vapour present in nitrogen as a drying medium. Compared to the insulation drying methods currently used in the industry, the method presented in the article has the following advantages: there is no cellulose depolymerization because there is no need to heat the insulation, there is no need to use large-size and energy-intensive dryers because the whole process takes place in the tank of the transformer. Important parameters of the drying process, such as methanol concentration in the nitrogen, flow rate, and process duration, were determined in four separate experiments. For the purposes of these experiments, a special system was constructed to control and measure the flow of drying medium. Controlling the flow rate of the carrier gas (nitrogen) made it possible to obtain different concentrations of methanol in nitrogen. Such values of concentration and flow rate were determined that allow drying of pressboard and paper in less than 144 h to a level lower than 1%.

Keywords: drying; moisture; methanol vapour; cellulose insulation; power transformer (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/11/4465/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/11/4465/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:11:p:4465-:d:1161279

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().