Comparison of Two Physical Models for Fitting PEM Fuel Cell Impedance Spectra Measured at a Low Air Flow Stoichiometry

2016 ◽  
Vol 163 (3) ◽  
pp. F238-F246 ◽  
Author(s):  
Tatyana Reshetenko ◽  
Andrei Kulikovsky
Keyword(s):  
Fuel Cell ◽  
Air Flow ◽  
Pem Fuel Cell ◽  
Physical Models ◽  
Impedance Spectra ◽  
Cell Impedance

scholarly journals Distribution of Relaxation Times Analysis of High-Temperature PEM Fuel Cell Impedance Spectra

2017 ◽  
Vol 230 ◽  
pp. 391-398 ◽  
Author(s):  
Alexandra Weiß ◽  
Stefan Schindler ◽  
Samuele Galbiati ◽  
Michael A. Danzer ◽  
Roswitha Zeis
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Relaxation Times ◽  
Pem Fuel Cell ◽  
Impedance Spectra ◽  
Cell Impedance ◽  
High Temperature Pem

scholarly journals Correction: Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6764-6765
Author(s):  
Tatyana Reshetenko ◽  
Andrei Kulikovsky
Keyword(s):  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Pem Fuel Cell ◽  
Spectroscopy Study ◽  
Cell Impedance ◽  
Impedance Spectroscopy Study ◽  
Nafion Film

Correction for ‘Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study’ by Tatyana Reshetenko et al., RSC Adv., 2019, 9, 38797–38806, DOI: 10.1039/C9RA07794D.

scholarly journals Thermal and Electrical Parameter Identification of a Proton Exchange Membrane Fuel Cell Using Genetic Algorithm

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2099 ◽  
Author(s):  
H. Ariza ◽  
Antonio Correcher ◽  
Carlos Sánchez ◽  
Ángel Pérez-Navarro ◽  
Emilio García
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Cell Model ◽  
Electrical Parameter ◽  
Real Data ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Physical Models ◽  
Real Behavior ◽  
Exchange Membrane

Proton Exchange Membrane Fuel Cell (PEMFC) fuel cells is a technology successfully used in the production of energy from hydrogen, allowing the use of hydrogen as an energy vector. It is scalable for stationary and mobile applications. However, the technology demands more research. An important research topic is fault diagnosis and condition monitoring to improve the life and the efficiency and to reduce the operation costs of PEMFC devices. Consequently, there is a need of physical models that allow deep analysis. These models must be accurate enough to represent the PEMFC behavior and to allow the identification of different internal signals of a PEM fuel cell. This work presents a PEM fuel cell model that uses the output temperature in a closed loop, so it can represent the thermal and the electrical behavior. The model is used to represent a Nexa Ballard 1.2 kW fuel cell; therefore, it is necessary to fit the coefficients to represent the real behavior. Five optimization algorithms were tested to fit the model, three of them taken from literature and two proposed in this work. Finally, the model with the identified parameters was validated with real data.

Effect of Gravity on Droplet Growth and Detachment Inside a Simulated PEM Fuel Cell Air Flow Channel With Hydrophobic Walls

2013 ◽  
Author(s):  
Andres Munoz ◽  
Abhijit Mukherjee
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Air Flow ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Droplet Growth ◽  
Flow Rates ◽  
Air Supply ◽  
Supply Channel ◽  
Exchange Membrane

Water management still remains a challenge for proton exchange membrane fuel cells. Byproduct water formed in the cathode side of the membrane is wicked to the air supply channel through the gas diffusion layer. Water emerges into the air supply channel as droplets, which are then removed by the air stream. When the rate of water production is higher than the rate of water removal, droplets start to accumulate and coalesce with each other forming slugs consequently clogging the channels and causing poor fuel cell performance. It has been shown in previous experiments that rendering the channels hydrophobic or super-hydrophobic cause water droplets to be removed faster, not allowing time to coalesce, and therefore making channels less prone to flooding. In this numerical study we analyze water droplet growth and detachment from a simulated hydrophobic air supply channel inside a proton exchange membrane (PEM) fuel cell. In these numerical simulations the Navier-Stokes equations are solved using the SIMPLER method coupled with the level set technique in order to track the liquid-vapor interface. The effect of the gravity field acting in the −y, −x, and +x directions was examined for an array of water flow rates and air flow rates. Detachment times and diameters were computed. The results showed no significant effect of the gravity field acting in the three different directions as expected since the Bond and Capillary numbers are relatively small. The maximum variations in detachment time and diameter were found to be 8.8 and 4.2 percent, respectively, between the horizontal channel and the vertical channel with gravity acting in the negative x direction, against the air flow. Droplet detachment was more significantly affected by the air and water flow rates.

PEM Fuel Cell Impedance at Open Circuit

2016 ◽  
Vol 163 (5) ◽  
pp. F319-F326 ◽  
Author(s):  
A. A. Kulikovsky
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Open Circuit ◽  
Cell Impedance

Understanding Fuel-Cell Impedance Spectra Via Numerical Modeling: A Single-Phase Water-Management Study

2020 ◽  
Vol MA2020-01 (38) ◽  
pp. 1607-1607
Author(s):  
Aslan Kosakian ◽  
Luis Padilla Urbina ◽  
Aidan Heaman ◽  
Marc Secanell
Keyword(s):  
Water Management ◽  
Numerical Modeling ◽  
Fuel Cell ◽  
Single Phase ◽  
Impedance Spectra ◽  
Management Study ◽  
Cell Impedance ◽  
Phase Water

Numerical Simulation of Liquid Water and Air Flow in Separator-Channels in PEM Fuel Cell Using LBM

2007 ◽  
Author(s):  
Yutaka Tabe ◽  
Kohsuke Kibo ◽  
Kazushige Kikuta ◽  
Takemi Chikahisa ◽  
Masaya Kozakai
Keyword(s):  
Fuel Cell ◽  
Liquid Water ◽  
Water Droplet ◽  
Polymer Electrolyte Membrane ◽  
Air Flow ◽  
Pem Fuel Cell ◽  
Two Phase ◽  
Cross Sectional ◽  
Electrolyte Membrane ◽  
Condensed Water

In a polymer electrolyte membrane (PEM) fuel cell, the condensed water in the separator-channel prevents the supply of reactants to electrodes, which deteriorates the cell performance. The Lattice Boltzmann simulation has been developed to understand the behavior of condensed water in the separator-channels. The calculation process was improved, and the effect on the stability and reliability of simulation of two-phase flows with large density difference was confirmed. Further, the comparison with experiment of the falling water droplet by gravitation on the slope of micro porous layer was conducted to validate effectiveness of the improved simulation. It was shown that the simulation can express the increase in falling speed of water droplet and the effect of inclined angle of the slope, and our simulation is effective enough to estimate the liquid water and air flow in the separator-channel. Finally, the simulation of liquid water behaviors in separator-channels with various cross-sectional shapes was conducted, and the drain efficiency of water droplet of separator-channel was discussed.

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