A complete two-phase model of a porous cathode of a PEM fuel cell

2007 ◽  
Vol 164 (1) ◽  
pp. 174-181 ◽  
Author(s):  
J.J. Hwang
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Phase Model ◽  
Two Phase ◽  
Porous Cathode

A Two-Dimensional Two-Phase Model of a PEM Fuel Cell

2006 ◽  
Vol 153 (2) ◽  
pp. A372 ◽  
Author(s):  
Guangyu Lin ◽  
Trung Van Nguyen
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Phase Model ◽  
Two Dimensional ◽  
Two Phase

A Two Phase Model of a Phosphoric Acid Doped PEM Fuel Cell

2006 ◽  
Author(s):  
Denver F. Cheddie ◽  
Norman D. H. Munroe
Keyword(s):  
Fuel Cell ◽  
Phosphoric Acid ◽  
Proton Exchange Membrane ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Intermediate Temperature ◽  
Phase Model ◽  
Normal Operation ◽  
Two Phase

A two-phase model of an intermediate temperature (120–200 °C) proton exchange membrane (PEM) fuel cell is presented. This model accounts for two phase effects due to gas solubility in the phosphoric acid/PBI electrolyte, and considers aqueous phase electrochemical reactions. It accounts for all polarization and transport phenomena, and shows a good fit with experimental data in the temperature range (150–190 °C). This paper investigates catalyst utilization in intermediate temperature PEM fuel cells with phosphoric acid doped membranes. Simulations show that, under normal operation, 1–2% of the catalyst is utilized at both electrodes. Strategies are suggested to help reduce the cost of producing power from such systems.

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.

Sign in / Sign up

Export Citation Format

Share Document