Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It
This research was carried out during the realization of a project with the aim of developing a method of drying cellulose insulation in power transformers by using synthetic ester. Unfortunately, during the drying process, the ester is systematically contaminated with mineral oil, which reduces its...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/7/1839 |
| _version_ | 1827696684835012608 |
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| author | Hubert Moranda Jaroslaw Gielniak Ireneusz Kownacki |
| author_facet | Hubert Moranda Jaroslaw Gielniak Ireneusz Kownacki |
| author_sort | Hubert Moranda |
| collection | DOAJ |
| description | This research was carried out during the realization of a project with the aim of developing a method of drying cellulose insulation in power transformers by using synthetic ester. Unfortunately, during the drying process, the ester is systematically contaminated with mineral oil, which reduces its water absorption. Information on the oil concentration in the mixture is needed in two cases: when deciding how to treat the mixture, and during the treatment. The article presents two methods: (1) based on the measurement of the mixture density, and (2) based on the measurement of a capacitor immersed in the mixture. The most important scientific achievement of the work is the proof, by way of experiment, of the existence of a relationship between the concentration of mineral oil and (1) the density of the mixture, and (2) the capacity of the capacitor immersed in it. These relations are presented in the form of equations for which the error calculus showed that the uncertainty of measurement for both methods did not exceed 3 p. %. Due to the similar measurement error of both methods, the authors recommend the capacitance method as easier to use, especially online. |
| first_indexed | 2024-03-10T12:53:53Z |
| format | Article |
| id | doaj.art-139c9b7c3a9a4c6e81788797d1d29646 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T12:53:53Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-139c9b7c3a9a4c6e81788797d1d296462023-11-21T12:03:02ZengMDPI AGEnergies1996-10732021-03-01147183910.3390/en14071839Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in ItHubert Moranda0Jaroslaw Gielniak1Ireneusz Kownacki2Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A Str., 61-138 Poznan, PolandInstitute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A Str., 61-138 Poznan, PolandCentre for Advanced Technologies, Adam Mickiewicz University in Poznan, Grunwaldzka 6 Str., 60-780 Poznan, PolandThis research was carried out during the realization of a project with the aim of developing a method of drying cellulose insulation in power transformers by using synthetic ester. Unfortunately, during the drying process, the ester is systematically contaminated with mineral oil, which reduces its water absorption. Information on the oil concentration in the mixture is needed in two cases: when deciding how to treat the mixture, and during the treatment. The article presents two methods: (1) based on the measurement of the mixture density, and (2) based on the measurement of a capacitor immersed in the mixture. The most important scientific achievement of the work is the proof, by way of experiment, of the existence of a relationship between the concentration of mineral oil and (1) the density of the mixture, and (2) the capacity of the capacitor immersed in it. These relations are presented in the form of equations for which the error calculus showed that the uncertainty of measurement for both methods did not exceed 3 p. %. Due to the similar measurement error of both methods, the authors recommend the capacitance method as easier to use, especially online.https://www.mdpi.com/1996-1073/14/7/1839oil-paper insulationdrying of the transformersynthetic ester |
| spellingShingle | Hubert Moranda Jaroslaw Gielniak Ireneusz Kownacki Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It Energies oil-paper insulation drying of the transformer synthetic ester |
| title | Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It |
| title_full | Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It |
| title_fullStr | Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It |
| title_full_unstemmed | Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It |
| title_short | Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It |
| title_sort | assessment of concentration of mineral oil in synthetic ester based on the density of the mixture and the capacitance of the capacitor immersed in it |
| topic | oil-paper insulation drying of the transformer synthetic ester |
| url | https://www.mdpi.com/1996-1073/14/7/1839 |
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