Development of Next Generation Heavy Duty Bus Fuel Cells with Enhanced Durability
Bibliographic record
Abstract
The large-scale commercialization of durable and cost-competitive Polymer Electrolyte Fuel Cell (PEFC) technology for automotive applications still faces significant challenges. Fuel cell manufacturers need to develop low cost materials and fabrication approaches that surpass current levels of performance and durability. With funding from Ballard Power Systems and Automotive Partnership Canada, the present three-year project is dedicated to research and product development of next generation PEFC stack technology for transit buses [1]. The central objective is to advance the fundamental understanding of membrane degradation mechanisms and failure modes under drive cycles and conditions that are typical of heavy duty vehicle operation, and to leverage this knowledge to develop enhanced durability solutions. The project involves a cohesive research team from Ballard Power Systems, Simon Fraser University, and University of Victoria, with complementary and multi-disciplinary expertise in fuel cell science and technology, materials design and fabrication, multi-scale modeling, system design and engineering, as well as system controls and diagnostics. A comprehensive experimental-theoretical research approach is pursued that ranges from fundamental theory to empirical analysis, with close university-industry collaboration. For validation purposes, the research benefits from extensive real-time field data and field operated material samples extracted from the Whistler, British Columbia fuel cell bus fleet. The results obtained to date have enabled substantial improvements in membrane stability under bus conditions (based on laboratory testing) and enhanced the ability to accurately predict the fuel cell stack lifetime over several years of on-road transit service. This understanding will guide the development of the next generation of heavy duty fuel cell modules that reduce both capital cost and operating costs of fuel cell buses, making them commercially competitive with diesel hybrid buses on a lifecycle basis. References: [1] http://www.apc-hdfc.ca/
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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".