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Monitoring the Sol and Gel in Natural Esters under Open Beaker Thermal Aging

2021· article· en· W4205660433 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldEngineering
TopicPower Transformer Diagnostics and Insulation
Canadian institutionsUniversité du Québec à Chicoutimi
Fundersnot available
KeywordsMaterials scienceAccelerated agingDielectric strengthTransformerThermal stabilityMoistureThermalPolymerizationViscosityComposite materialChemical engineeringDielectricOrganic chemistryChemistryPolymerElectrical engineeringThermodynamics

Abstract

fetched live from OpenAlex

The application of natural ester-based dielectric liquids for liquid-filled transformers is a topic of high concern for transformer owners and utilities. The potential advantages of being biodegradable, high flash point, good dielectric properties, and high moisture tolerance encapsulated natural esters to be a promising solution for transformer insulation systems. Several research reports are affirmative towards the usage of natural esters in transformers. Meanwhile, the poor oxidation stability of natural esters is a challenge that needs to be emphasized. Natural esters develop a polymerized aging product known as gelling under the influence of oxygen. Before gelling occurs, the first thing is to form sol in the bulk of the liquid that influences the liquid viscosity and further accelerates oxidation. Thus, in this paper, a natural ester is subjected to accelerated thermal aging to observe and understand the formation of sol. However, accelerated thermal stressing is continued till gelling is evident in the liquid. The changes in liquid absorbance with aging and the level after which sol is developed is reported. The changes in the viscosity of the natural ester with the formation of sol and gel are also reported. Further, the compositional changes of the liquid that are responsible for the formation of sol are reported using FTIR analysis. Finally, the breakdown failure rate of the completely gelled natural ester is reported to understand the influence of the gelling on the liquid breakdown strength.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.556
Threshold uncertainty score0.175

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.014
GPT teacher head0.242
Teacher spread0.228 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it