2020
DOI: 10.3390/en13133467
|View full text |Cite
|
Sign up to set email alerts
|

Laboratory Model Studies on the Drying Efficiency of Transformer Cellulose Insulation Using Synthetic Ester

Abstract: This paper presents the results of laboratory tests of cellulose insulation drying with the use of synthetic ester. The effectiveness of the drying process was investigated depending on the initial moisture of cellulose samples (2%, 3%, and 4%), ester temperature (55, 70, and 85 °C), initial moisture of the ester (70, 140, and 220 ppm), drying time (48, 96, and 168 h), and the weight ratio of cellulosic materials to ester (0.067 and 0.033). A large influence of temperature and time of drying on the eff… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

1
12
0

Year Published

2020
2020
2023
2023

Publication Types

Select...
3
2

Relationship

1
4

Authors

Journals

citations
Cited by 9 publications
(13 citation statements)
references
References 13 publications
1
12
0
Order By: Relevance
“…This phenomenon was already observed in earlier publications from a co-author of this article [7,19]. Figure 13 presents the effect of the degree of sample ageing on the activation energy E A value ( Figure 13a) and values of two dominant time constants of the relaxation processes (Figure 13b), which were determined on the basis of the depolarization current characteristics according to Equation (5). The most important change that was observed on the characteristics from Figure 13 is that the growing degree of thermal degradation of cellulose fibers resulted in a minor, but constant, decrease in the activation energy value, after which the low-frequency relaxation process of the insulation being examined was subject to change.…”
Section: Effect Of the Degree Of Moisturesupporting
confidence: 72%
See 4 more Smart Citations
“…This phenomenon was already observed in earlier publications from a co-author of this article [7,19]. Figure 13 presents the effect of the degree of sample ageing on the activation energy E A value ( Figure 13a) and values of two dominant time constants of the relaxation processes (Figure 13b), which were determined on the basis of the depolarization current characteristics according to Equation (5). The most important change that was observed on the characteristics from Figure 13 is that the growing degree of thermal degradation of cellulose fibers resulted in a minor, but constant, decrease in the activation energy value, after which the low-frequency relaxation process of the insulation being examined was subject to change.…”
Section: Effect Of the Degree Of Moisturesupporting
confidence: 72%
“…The above conclusion was confirmed for all the examined samples, i.e., regardless of the degree of their moisture or ageing. Figure 7a presents Debye regression functions according to Formula (5), which were used in order to fix time constants of two relaxation mechanisms based on the depolarization current of the cellulose-aramid insulation sample being examined. Certainly, the data presented in Figure 7a are only exemplary, while the regression functions being described were used for all the insulation samples, i.e., for each degree of moisture and ageing and for all temperatures.…”
Section: Effect Of Temperaturementioning
confidence: 99%
See 3 more Smart Citations