scholarly journals PEM Fuel Cell Start-Up/Shut-Down Losses vs Relative Humidity: The Impact of Water in the Electrode Layer on Carbon Corrosion

2018 ◽  
Vol 165 (16) ◽  
pp. F1349-F1357 ◽  
Author(s):  
Thomas Mittermeier ◽  
Alexandra Weiß ◽  
Frédéric Hasché ◽  
Hubert A. Gasteiger
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Pem Fuel Cell ◽  
Carbon Corrosion ◽  
Electrode Layer ◽  
Start Up ◽  
The Impact

Analysis of Pressure Drop and Water Flooding of Two-Phase Flow Along Channels for a PEM Fuel Cell System

2009 ◽  
Author(s):  
Jinglin He ◽  
Song-Yul Choe ◽  
Chang-Ouk Hong
Keyword(s):  
Fuel Cell ◽  
Pressure Drop ◽  
Relative Humidity ◽  
Liquid Water ◽  
Water Distribution ◽  
Gas Flow ◽  
Pem Fuel Cell ◽  
Cell System ◽  
Water Flooding ◽  
Two Phase

The flow in gas flow channels of an operating polymer electrolyte membrane (PEM) fuel cell has a two-phase characteristic that includes air, water vapor and liquid water and significantly affects the water flooding, pressure distribution along the channels, and subsequently the performance of the cell and system. Presence of liquid water in channels prevents transport of the reactants to the catalysts and increases the pressure difference between the inlet and outlet of channels, which leads to high parasitic power of pumps used in air and fuel supply systems. We propose a model that enables prediction of pressure drop and liquid water distribution along channels and analysis of water flooding in an operating fuel cell. The model was developed based on a gas-liquid two-phase separated flow that considers the variations of gas pressure, mass flow rate, relative humidity, viscosity, void fraction, and density along the channels on both sides. Effects of operating parameters that include stoichoimetric ratio, relative humidity, and inlet pressure on the pressure drop and water flooding along the channels were analyzed.

scholarly journals Effects of hydrogen relative humidity on the performance of an air-breathing PEM fuel cell

2019 ◽  
Vol 30 (4) ◽  
pp. 2077-2097 ◽  
Author(s):  
Zhenxiao Chen ◽  
Derek Ingham ◽  
Mohammed Ismail ◽  
Lin Ma ◽  
Kevin J. Hughes ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Relative Humidity ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Air Breathing ◽  
Content Type ◽  
The Heat Transfer Coefficient

Purpose The purpose of this paper is to investigate the effects of hydrogen humidity on the performance of air-breathing proton exchange membrane (PEM) fuel cells. Design/methodology/approach An efficient mathematical model for air-breathing PEM fuel cells has been built in MATLAB. The sensitivity of the fuel cell performance to the heat transfer coefficient is investigated first. The effect of hydrogen humidity is also studied. In addition, under different hydrogen humidities, the most appropriate thickness of the gas diffusion layer (GDL) is investigated. Findings The heat transfer coefficient dictates the performance limiting mode of the air-breathing PEM fuel cell, the modelled air-breathing fuel cell is limited by the dry-out of the membrane at high current densities. The performance of the fuel cell is mainly influenced by the hydrogen humidity. Besides, an optimal cathode GDL and relatively thinner anode GDL are favoured to achieve a good performance of the fuel cell. Practical implications The current study improves the understanding of the effect of the hydrogen humidity in air-breathing fuel cells and this new model can be used to investigate different component properties in real designs. Originality/value The hydrogen relative humidity and the GDL thickness can be controlled to improve the performance of air-breathing fuel cells.

Effect of Carbon Corrosion on Wettability of PEM Fuel Cell Electrodes

2019 ◽  
Vol 166 (12) ◽  
pp. F709-F715 ◽  
Author(s):  
Zhengyuan Fang ◽  
Andrew G. Star ◽  
Thomas F. Fuller
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Carbon Corrosion ◽  
Fuel Cell Electrodes

Development of Pem Fuel Cell in Pakistan

2009 ◽  
Vol 20 (4) ◽  
pp. 597-604 ◽  
Author(s):  
R. Raza ◽  
S. A. Hayat ◽  
M. Ashraf Chaudhry ◽  
J. Muhammad
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Graphical Form ◽  
Energy Sources ◽  
Global Approach ◽  
Alternate Energy ◽  
The Impact ◽  
Energy Shortage

There is a worldwide awareness for finding alternate energy sources. Fuel cells are seen as potential candidates to fill the upcoming energy shortage gap. In line with this global approach, an initiative has been undertaken for developing Fuel Cells in Pakistan. Accordingly, a prototype Fuel Cell was developed. Different experiments were conducted to gauge its performance. The results are presented in the graphical form. The study has also been extended to measure the impact of catalyst on various performance determining parameters of the Fuel Cell.

PEM fuel cell relative humidity (RH) and its effect on performance at high temperatures

2008 ◽  
Vol 53 (16) ◽  
pp. 5315-5321 ◽  
Author(s):  
Jianlu Zhang ◽  
Yanghua Tang ◽  
Chaojie Song ◽  
Zetao Xia ◽  
Hui Li ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
High Temperatures ◽  
Pem Fuel Cell

Quantitative analysis of carbon corrosion during fuel cell start-up and shut-down by anode purging

2012 ◽  
Vol 219 ◽  
pp. 240-248 ◽  
Author(s):  
Nicolas Linse ◽  
Günther G. Scherer ◽  
Alexander Wokaun ◽  
Lorenz Gubler
Keyword(s):  
Quantitative Analysis ◽  
Fuel Cell ◽  
Carbon Corrosion ◽  
Start Up

The Start-Up Analysis of a PEM Fuel Cell System in Vehicles

2013 ◽  
Vol 11 (1) ◽  
pp. 91-111 ◽  
Author(s):  
Abid Rabbani ◽  
Masoud Rokni ◽  
Elham Hosseinzadeh ◽  
Henrik Hilleke Mortensen
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Cell System ◽  
Fuel Cell System ◽  
Start Up
Sign in / Sign up

Export Citation Format

Share Document