A predictive model for polyethylene cable insulation degradation in combined thermal and radiation environments

Vykydalová, Anna; Dubaj, Tibor; Cibulková, Zuzana; Mizerová, G.; Zavadil, Michal

doi:10.1016/j.polymdegradstab.2018.11.002

Cited by 12 publications

(7 citation statements)

References 17 publications

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“…From Eq. ( 5 ), it can be seen that the parameter A is conversion dependent, while the parameter D should be independent of degradation extent [ 5 ]. All the samples under study correspond to the same material with varying degradation extent with respect to oxidation products.…”

Section: Resultsmentioning

confidence: 99%

“…Thermooxidative degradation of materials in nuclear powerplants is a typical example of the application where the materials are exposed simultaneously to radiation and thermal ageing so that many samples should be tested and many experiments should be carried out for the complete kinetic description of the degradation progress. An important task is to test the thermooxidative stability of the samples to assess their lifetime under these specific conditions [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

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A rapid method for approximative evaluation of thermooxidative stability of organic materials

Vykydalová

Cibulková

Dubaj

et al. 2022

J Therm Anal Calorim

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In this work, a novel procedure for fast assessment of the material residual stability is proposed. The method resides in integral isoconversional kinetic analysis of the thermal oxidation of unaged material employing the Berthelot–Hood temperature function. Subsequently, the obtained conversion-independent kinetic parameter D is also employed for samples aged in various regimes. The value of conversion-dependent parameter A for aged samples is calculated from the oxidation onset temperature measured at 5 °C min −1 . The residual stabilities are then calculated as a simple ratio of the parameter A of aged material to that of the unaged one. The method has been applied and verified for the samples of low-density polyethylene aged by thermal, radiation and combined ageing. The method can also be employed for high-throughput screening of the effect of various stabilizers and antioxidants in a given organic matrix.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A rapid method for approximative evaluation of thermooxidative stability of organic materials

Vykydalová

Cibulková

Dubaj

et al. 2022

J Therm Anal Calorim

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“…Additional terms can be added to the right-hand side of Eq. ( 1 ) to account for the effect of other factors on the reaction rate such as the effect of pressure of reactants or products [ 4 – 6 ], effect of radiation [ 7 ], effect of mechanical stress, electric field, etc. The separability of temperature and conversion function indicated in Eq.…”

Section: Discussionmentioning

confidence: 99%

Frequent flaws encountered in the manuscripts of kinetic papers

Šimon

Dubaj

Cibulková

2022

J Therm Anal Calorim

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In the manuscripts dealing with thermoanalytical kinetics, many flaws, mistakes, and misconceptions are encountered repeatedly. In this paper, frequent flaws encountered in manuscript of kinetic papers are reviewed, mainly those originating in the false interpretation of the general rate equation, improper employment of integral isoconversional methods, conclusions drawn from the values of a single kinetic parameter, absence of error estimation and application of single-heating rate methods. Assessment of the quality of kinetic treatment is also noticed. Some experimental imperfections that could lead to incorrect values of kinetic parameters are mentioned.

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“…Anna Vykydalová et al. [16] developed a predictive model for the insulation degradation of polyethylene cable after performing artificial ageing.…”

Section: Introductionmentioning

confidence: 99%

“…Jingle Jabha et al used acoustic emission technique for the failure prediction in XLPE power cables [15]. Anna Vykydalová et al [16] developed a predictive model for the insulation degradation of polyethylene cable after performing artificial ageing.…”

Section: Introductionmentioning

confidence: 99%

Degradation assessment of in‐service aerial bundled cables in coastal areas leading to prognosis using infrared thermography

Hassan¹,

Khan²,

Abbas³

et al. 2020

IET Generation Trans & Dist

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Of late, cross-linked polyethylene insulated aerial bundled cables have replaced conventional copper conductors being resistant to electricity pilferage, offer lower maintenance costs and reduced power losses. However, in coastal areas, aerial bundled cables experience frequent insulation breakdown causing sudden cable failures leading to unexpected power shutdowns. Condition monitoring, employing sophisticated diagnostic techniques, has thus become a major requirement of the energy sector. The reported research work utilizes infrared thermography as one such candidate NDT technique. A novel framework is proposed to investigate the progressive shift in the statistical parameters of the temperature distribution in aerial bundled cables' insulation, as it degrades over time. The cumulative distribution function of pixel intensity data from a healthy/ operational aerial bundled cable is first compared with a reported failed aerial bundled cable. A prominent difference in 0.9 cumulative distribution function values is observed in the temperature distributions. Therefore, 0.9 cumulative distribution function values are used for degradation quantification with respect to ageing. Degradation rates are then computed using periodically acquired thermographic data from operational aerial bundled cables, installed at two different locations in a coastal region, each subjected to different marine climate. The proposed technique proved effective in degradation rate assessment of insulation of operational aerial bundled cables. Consequently, the results achieved can also be utilized for remaining useful life prediction of these cables. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

A predictive model for polyethylene cable insulation degradation in combined thermal and radiation environments

Cited by 12 publications

References 17 publications

A rapid method for approximative evaluation of thermooxidative stability of organic materials

A rapid method for approximative evaluation of thermooxidative stability of organic materials

Frequent flaws encountered in the manuscripts of kinetic papers

Degradation assessment of in‐service aerial bundled cables in coastal areas leading to prognosis using infrared thermography

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