scholarly journals Degradation in PEM Fuel Cells and Mitigation Strategies Using System Design and Control

2018 ◽  
Author(s):  
Jekan Thangavelautham
Keyword(s):  
Fuel Cells ◽  
System Design ◽  
Pem Fuel Cells ◽  
Mitigation Strategies ◽  
And Control

Effects of water induced pore blockage and mitigation strategies in low temperature PEM fuel cells – A simulation study

2017 ◽  
Vol 42 (37) ◽  
pp. 23799-23813 ◽  
Author(s):  
Srinivasan Raman ◽  
K.B. Iyeswaria ◽  
Sridharakumar Narasimhan ◽  
Raghunathan Rengaswamy
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Simulation Study ◽  
Pem Fuel Cells ◽  
Mitigation Strategies ◽  
Pore Blockage

On the dynamics and control of through-plane water distributions in PEM fuel cells

2008 ◽  
Vol 63 (17) ◽  
pp. 4418-4432 ◽  
Author(s):  
Buz A. McCain ◽  
Anna G. Stefanopoulou ◽  
Ilya V. Kolmanovsky
Keyword(s):  
Fuel Cells ◽  
Pem Fuel Cells ◽  
Dynamics And Control ◽  
And Control

Performance of a High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC) Operating on Simulated Reformate

2015 ◽  
Author(s):  
Michael G. Waller ◽  
Mark R. Walluk ◽  
Thomas A. Trabold
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
System Design ◽  
Proton Exchange Membrane ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Fuel Reforming ◽  
Exchange Membrane ◽  
High Temperature Pem

Conventional proton exchange membrane (PEM) fuel cell systems suffer from requiring high purity hydrogen, necessitating a costly on-board hydrogen storage tank to be incorporated into the overall system design. One method to overcome this barrier is to use an on-board reforming system fueled by some sort of hydrocarbon. Unfortunately though, most fuel reforming processes generate significant amounts of impurities, such as CO and CO2, requiring a costly and complex upfront reforming system that is unwieldy for a practical system. High temperature PEM fuel cells based on acid doped polybenzimidazole (PBI), are capable of operating on lower quality reformed hydrogen, allowing for a simplified on-board fuel reforming system design to be envisioned. Advances in high temperature PEM fuel cells have progressed to the point where they are now a commercially viable technology. However, there remains a lack of published literature on the performance of HT-PEMFCs operating on common reformate effluent compositions consisting primarily of H2, CO, CO2, and N2. In this work, the performance of PBI-based HT-PEMFCs are evaluated under simulated reformate compositions.

Control Oriented Discretized Cathode Control Volume Method for Improved PEM Fuel Cell Modeling

2015 ◽  
Author(s):  
Alexander J. Headley ◽  
Dongmei Chen
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Spatial Information ◽  
Control Volume ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Fuel Cell Stack ◽  
Modeling Methodology ◽  
Volume Method ◽  
And Control

The humidity levels in PEM fuel cells has a profound effect on the performance. However, in large fuel cell stacks the relative humidity (RH) changes significantly along the length of the stack. This paper presents a control-oriented model with spatial considerations of the distribution of water vapor that can be used to properly predict and control the humidity levels in a PEM fuel cell stack. This model predicts the dynamic response of the stack in real-time by tracking energy and mass flows in four basic CVs. To provide spatial information of the stack conditions, the cathode CV was further subdivided into 6 sub-volumes. The model was validated with experiments conducted on a 28-cell, 2kW fuel cell stack. The validation results show that the multiple CV approach can accurately predict the stack RH and voltage, and is capable of predicting localized voltage losses. This new modeling methodology shows the importance of a distributed understanding of the RH profile, and provides a tool to create control algorithms for PEM fuel cells that consider the health of all the sections of the stack.

Integration of PEM Fuel Cells and Lithium Ion Secondary Battery into a Single Hybrid Electric Energy Source – Part I: Control System

2016 ◽  
Vol 817 ◽  
pp. 289-295
Author(s):  
Grzegorz Grzeczka ◽  
Adam Polak ◽  
Radosław Rak
Keyword(s):  
Energy Source ◽  
Fuel Cells ◽  
Control System ◽  
Early Stage ◽  
Electric Energy ◽  
Lithium Ion ◽  
Pem Fuel Cells ◽  
Stage Of Development ◽  
And Control ◽  
Technology Demonstrator

Both fuel cells and lithium-ion cells are chemical sources of electric energy. In either of these sources, energy is obtained from chemical reactions performed at the electrodes. However, different constructions of those cells causes that they are characterized by different, and in many cases opposite, properties. Their combination into a single hybrid power source can therefore lead to utilization of advantages of both of them and, at the same time, mutual elimination of their disadvantages. The article presents control assumptions, structure of control system and control algorithm of a hybrid portable electric energy source in an early stage of development – a technology demonstrator. Discussed technology demonstrator integrates PEM fuel cells with Li-ion secondary cells.

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