Summary
Given the early stages of maturity of these re-refined oils, there is a need to generate knowledge and evidence about how the typical cellulose-based materials used in transformers age while immersed in such liquids. That’s why this work focuses on assessing the ageing performance of Kraft and TUK papers in accelerated lab-ageing tests at 105ºC, 120ºC and 140ºC immersed in a 100% re-refined oil. Current results are compared to previously reported data obtained by this same research group from paper samples immersed in conventional uninhibited mineral oil and in a bio-based hydrocarbon oil.
Read more Read lessDegree of polymerization (DP) has been measured for all paper samples across all temperatures during test durations ranging from 480 hours (at 140ºC) to more than 1500h (at 105ºC). Typical cellulose degradation by-products such as methanol, ethanol and furans have been also measured. Kinetic studies have been conducted and compared with previously published data by this same research group.
The results and its comparative analysis suggest that both Kraft and TUK papers age very similarly to when immersed in other hydrocarbon-based oils (mineral or bio-based).
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | D1_11120_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Portugal |
| Study committees | |
| File size | 698 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
PEIXOTO Anabela - LABELEC; CAMPELO Hugo - NYMAS AB (PORTUGAL); FIALHO Mónica - LABELEC; MOREIRA Maria - UNIVERSIDADE NOVA DE LISBOA; EUSÉBIO Mário - UNIVERSIDADE NOVA DE LISBOA; MARTINS Rui - NYMAS AB (PORTUGAL)
