Recent advances in fuel cell technology at Ballard

Stumper, Jürgen; Stone, Charles W.

doi:10.1016/j.jpowsour.2007.08.071

Cited by 62 publications

(30 citation statements)

References 29 publications

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“…Voltage degradation rates have been collected from the literature [11,12,13,14,15]. Data from the literature and expert knowledge can provide the effects of operating conditions on voltage decay rate.…”

Section: System Specificationmentioning

confidence: 99%

Performance modelling of fuel cell systems through Petri nets

Fecarotti

Andrews

2016

2016 Annual Reliability and Maintainability Symposium (RAMS)

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This paper introduces a model based on the Petri net method for the performance evaluation of fuel cell systems during operation. The model simulates the operation of the fuel cell stack and its supporting systems by taking into account the causal relationships between the operation of the balance of plant and the fuel cell stack performance. Failures of the supporting system affect the operating parameters such as the stack temperature and humidity, the reactants' flow and pressure, and, in turn, the stack performance in terms of output voltage. Voltage degradation rates are needed in order to evaluate the system lifetime. The voltage degradation is related to the important operating parameters by means of empirical relationships. In order to demonstrate the capability of the model, numerical simulations are performed using data for voltage degradation rates collected from the literature. The voltage decay rate is modelled as a random variable within the aforementioned ranges. Time to failure and time to repair of components are generated from stochastic distributions. The use of a stochastic approach allows taking into account data uncertainty and variability. The modelling process produces distributions of the output parameters rather than point estimates delivered by alternative methods. This enables an appreciation of the best and worst possible output lifetime as well as the expected system performance. The model can be used to support the design, operation and maintenance of fuel cell systems.

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Section: System Specificationmentioning

confidence: 99%

Performance modelling of fuel cell systems through Petri nets

Fecarotti

Andrews

2016

2016 Annual Reliability and Maintainability Symposium (RAMS)

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“…Significant improvements have been made in this area through the introduction of new catalysts, improved catalyst support materials, optimized electro-catalyst layer structures, enhanced flow field design, and significant improvements in fuel cell stack and system controls. 64,65 Also, system design has received some attention, with some progress through the heat-flow-based technique called pinch technology. 66 Many advances have come through better understanding of unit cell component failures, design optimization, and operating strategies.…”

Section: C3 Technological Advancesmentioning

confidence: 99%

“…66 Many advances have come through better understanding of unit cell component failures, design optimization, and operating strategies. 67 Better models of system components such as the stack, gas humidifier, pressure swing absorber, membrane reactor, fuel cell processor, and membrane gas separator have been introduced recently or are in progress, all of which further contribute to the development of cheaper and more efficient components. 68 The Department of Energy regularly reviews the cost and technological progress of hydrogen storage and of fuel cells.…”

Section: C3 Technological Advancesmentioning

confidence: 99%

Hydrogen Production and Delivery Infrastructure as a Complex Adaptive System

Tolley¹

2010

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“…Diversified energy resources, growth in energy generation capacity, and feasible strategies are required to meet the increasing need for more energy [1]. One promising alternative strategy is an energy infrastructure based on sources using H 2 as the primary carrier [2].…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Aligned Carbon Nanotubes to Enhance the Performance of Fuel Cell

2013

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Abstract:The focus of this research lies on fundamental research to provide guidelines for the design of new nanocatalyst toward improvement of the performance of proton exchange membrane fuel cells (PEMFCs). To achieve this overarching goal, several specific steps were taken with aims to: (1) provide guidelines for the design of new catalysts; (2) promote nanocatalyst applications towards alternative energy applications; and (3) integrate advanced instrumentation into nanocharacterization and fuel cell (FC) electrochemical behavior. In tandem with these goals, the cathode catalysts were extensively refined to improve the performance of PEMFCs and minimize noble metal usage. In this study, the major accomplishment was producing aligned carbon nanotubes (ACNTs), which were then modified by platinum (Pt) nanoparticles via a post-functionalization colloidal chemistry approach. The Pt-ACNTs demonstrated improved cathodic catalycity, by building better device endurance and decreased Pt loading. It was also determined that surface mechanical properties, such as elastic modulus and hardness were increased. Collectively, these enhancements provided an improved FC device. The electrochemical analyses indicated that the power density of the PEMFCs was increased to 900 mW/cm 2 and current density to 3000 mA/cm 2 , respectively. The Pt loading was controlled at lower than 0.2 mg/cm 2 to decrease the manufacturing expenses.

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Recent advances in fuel cell technology at Ballard

Cited by 62 publications

References 29 publications

Performance modelling of fuel cell systems through Petri nets

Performance modelling of fuel cell systems through Petri nets

Hydrogen Production and Delivery Infrastructure as a Complex Adaptive System

Functionalization of Aligned Carbon Nanotubes to Enhance the Performance of Fuel Cell

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