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Record W7132995894

Dynamic Modelling of Process Chemistry in Kraft Pulp Mills

2022· dissertation· W7132995894 on OpenAlexaffabout
Adam Mitchell Rogerson

Bibliographic record

VenueTSpace · 2022
Typedissertation
Language
FieldEngineering
TopicAdvanced Control Systems Optimization
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsMillKraft processKraft paperProcess (computing)CombustionPulp (tooth)Process modelingPaper production
DOInot available

Abstract

fetched live from OpenAlex

Efficiency decline in the recovery cycle of Kraft pulp and paper mills can create dynamic conditions that lead to evaporator scaling and poor combustion properties at the recovery boiler. In extreme cases, these dynamic conditions can evolve into production disruptions and mill shutdowns. Currently, operational strategies are often evaluated with steady-state models without the capability to simulate dynamics, leading to misinformed operational decisions. Dynamic modelling offers the opportunity to provide accurate real-time information to operators to pre-emptively manage dynamic conditions before shutdowns are required. To this end, this research project developed a dynamic model of a Canadian softwood/hardwood pulp mill using CADSIM Plus with model calibration from a mill-wide sampling campaign. Time and impact estimates of common dynamic conditions were determined to inform and improve existing operational strategies. Further, linking the model to mill measurements would equip operators with real-time chemistry measurement leading to optimized process control.

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.

How this classification was reachedexpand

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 categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.295
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0010.000

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 head0.008
GPT teacher head0.284
Teacher spread0.276 · 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

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2022
Admission routes2
Has abstractyes

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