Vapor Concentration within the PEMFC Bipolar Plate over Long Term Operation
Bibliographic record
Abstract
One of the primary technical challenges associated with proton exchange membrane fuel cells (PEMFCs) is ensuring their durability.This study introduces an experimental methodology to evaluate the thermal and water characteristics within PEMFC during continuous operation under the New European Driving Cycle (NEDC) mode.Specifically, fifty micro relative humidity and temperature sensors (micro-RH/T sensors) are integrated into flow field plate channels to measure the distribution and characteristics of temperature and water vapor within the PEMFC.The study tracks evolution of these parameters over a 100-hour NEDC durability test, revealing notable trends.In addition, an artificial neuron network-based model (ANN-based model) is developed to analyze water transport through the membrane at both the beginning and the end of the durability test.The findings demonstrate the significant impact of temperature and water characteristics on the performance and durability of PEMFC under prolonged operational conditions.This research provides valuable insights into PEMFC operation and establishes a foundation for further advancements in PEMFC design, aiming to enhance performance and extend the lifetime of automotive PEMFCs.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
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".