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Record W2044774501 · doi:10.1080/00207230600800670

Experimental diagnostics of PEM fuel cells

2006· article· en· W2044774501 on OpenAlex
Asad J. Mughal, X. Li

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

VenueInternational Journal of Environmental Studies · 2006
Typearticle
Languageen
FieldEngineering
TopicFuel Cells and Related Materials
Canadian institutionsUniversity of Waterloo
Fundersnot available
KeywordsProton exchange membrane fuel cellAnodeElectrolyteHydrogenMaterials scienceCathodeWater transportChemical engineeringPermeationNuclear engineeringAnalytical Chemistry (journal)Fuel cellsMembraneChemistryChromatographyEnvironmental scienceEnvironmental engineeringWater flowElectrode

Abstract

fetched live from OpenAlex

In this study, water removal techniques were experimentally developed as a diagnostic tool for the investigation of polymer electrolyte membrane (PEM) fuel cell performance in order to achieve consistent, reliable and repeatable performance. The three water removal methods developed include cell orientation, cell shaking and hydraulic permeation, and instantaneous improvement in the fuel cell performance had been observed when these methods were employed. All the experiments were carried out with a single PEMFC with the active surface area of 50 cm2. Pure hydrogen was used as fuel and air was used as oxidant. It was found that operating the fuel cell at an orientation of 45 degrees towards gas outlet ports helped removing trapped liquid water from the cathode side; when cell assembly was shaken during the fuel cell operation, liquid water was observed to be removed from the cell structure and cell performance was improved. Water removal by hydraulic permeation was achieved by maintaining the pressure of hydrogen stream 10 kPa lower than that of air stream, which helped water removal by the anode gas stream. It was observed that the simultaneous application of these water removal methods allowed the test results obtained to be consistent, reliable and repeatable, and in general it increased the performance by 25% in ohmic polarization region and 30% in mass transport dominant region. Then these methods were applied to investigate the effects of the various operating conditions on the performance of the PEM fuel cell, including the effect of reactants temperature, pressure, stoichiometry, humidification and cell aging.

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: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.039
Threshold uncertainty score0.309

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 head0.006
GPT teacher head0.213
Teacher spread0.207 · 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