Modeling the Insulation Paper Drying Process from Thermogravimetric Analyses
AbstractIt is now well-established that moisture in the oil paper insulation used in power and instrument transformers significantly reduces the transformers’ lifetimes, and can eventually lead to premature failure. This moisture should, therefore, always be removed, not only during production but also after repairs. At the final stage of manufacturing, the drying process should be carried out to remove water and air vacuoles contained in the cellulose-based paper before impregnation. Successful drying helps increase the residual life of transformers, because the presence of moisture and air vacuoles accelerates the aging/degradation process of the oil paper insulation. Proper estimation of residual moisture before impregnation and the determination of the time required for drying play key roles in the time-consuming process of drying. In this paper, the disadvantages of inadequate drying are addressed, followed by a mathematical approach to model the paper drying process. A mathematical model describing the kinetics of drying according to temperature, initial moisture, paper weight, final moisture, and extraction rate is proposed. This model also estimated the amount of moisture removed at the end of the drying process. View Full-Text
A printed edition of this Special Issue is available here.
Share & Cite This Article
Betie, A.; Meghnefi, F.; Fofana, I.; Yeo, Z. Modeling the Insulation Paper Drying Process from Thermogravimetric Analyses. Energies 2018, 11, 517.
Betie A, Meghnefi F, Fofana I, Yeo Z. Modeling the Insulation Paper Drying Process from Thermogravimetric Analyses. Energies. 2018; 11(3):517.Chicago/Turabian Style
Betie, Amidou; Meghnefi, Fethi; Fofana, Issouf; Yeo, Zie. 2018. "Modeling the Insulation Paper Drying Process from Thermogravimetric Analyses." Energies 11, no. 3: 517.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.