Dynamic modeling and simulation of air-breathing proton exchange membrane fuel cell

2008 ◽  
Vol 182 (1) ◽  
pp. 168-174 ◽  
Author(s):  
T. Yalcinoz ◽  
M.S. Alam
Keyword(s):  
Fuel Cell ◽  
Modeling And Simulation ◽  
Dynamic Modeling ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Air Breathing ◽  
Exchange Membrane

Innovative Design of an Air-Breathing Proton Exchange Membrane Fuel Cell With a Piezoelectric Device

2009 ◽  
Vol 6 (3) ◽  
Author(s):  
Hsiao-Kang Ma ◽  
Shih-Han Huang
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Three Dimensional ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
Innovative Design ◽  
Current Output ◽  
Air Breathing ◽  
Piezoelectric Device ◽  
Exchange Membrane

This paper presents a three-dimensional transitional model to describe an innovative design for an air-breathing proton exchange membrane fuel cell (AB-PEMFC) with a microdiaphragm actuated by a piezoelectric device. This newly designed gas pump with a piezoelectric actuation structure is utilized as an air-flow channel in a proton exchange membrane fuel cell (PEMFC) system called PZT-PEMFC. When the actuator moves in the outward direction to increase the cathode channel volume, the air is sucked into the chamber: inward movement decreases channel volume and thereby compresses air into the catalyst layer and enhances the chemical reaction. The air-standard PZT-PEMFC cycle coupling with fuel∕air ratio is proposed to describe an air-breathing PZT-PEMFC. The model is able to simulate its major phenomena and performance in different fuel∕air ratio and PZT frequency. The results show that the PZT actuation leads to a more stable current output, more drained water, stronger suction, and overcome concentration losses at a proper PZT frequency.

Performance improvement of air-breathing proton exchange membrane fuel cell stacks by thermal management

2020 ◽  
Vol 45 (42) ◽  
pp. 22324-22339 ◽  
Author(s):  
Wei-Mon Yan ◽  
Ming-Shiang Zeng ◽  
Tien-Fu Yang ◽  
Chen-Yu Chen ◽  
Mohammad Amani ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Thermal Management ◽  
Performance Improvement ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Air Breathing ◽  
Exchange Membrane

Mass Transports in an Air-Breathing Cathode of a Proton Exchange Membrane Fuel Cell

2009 ◽  
Vol 6 (4) ◽  
Author(s):  
J. J. Hwang ◽  
W. R. Chang ◽  
C. H. Chao ◽  
F. B. Weng ◽  
A. Su
Keyword(s):  
Fuel Cell ◽  
Mass Transport ◽  
Proton Exchange Membrane ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Air Breathing ◽  
Coupled Equations ◽  
Porous Cathode ◽  
Porous Cathodes ◽  
Exchange Membrane

Mass transport in an air-breathing cathode of a proton exchange membrane (PEM) fuel cell was investigated numerically. The porous cathode in contact with a perforated current collector breathes fresh air through an array of orifices. The diffusions of reactant species in the porous cathodes are described using the Stefan–Maxwell equation. The electrochemical reaction on the surfaces of the porous cathode is modeled using the Butler–Volmer equation. Gas flow in the air-breathing porous cathodes is described using isotropic linear resistance model with constant porosity and permeability. The electron/ion transports in the catalyst/electrolyte are handled using charge conservation based on Ohm’s law. A finite-element scheme is adopted to solve these coupled equations. The effects of electrode porosity (0.4<ε<0.6) on the fluid flow, mass transport, and electrochemistry are examined. Detailed electrochemical/mass characteristics, such as flow velocities, species mass fraction, species flux, and current density distributions are presented. These details provide a solid basis for optimizing the geometry of a PEM fuel cell stack that is run in passive mode.

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