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Influence of Operating and Electrochemical Parameters on PEMFC Performance: A Simulation Study
Imtiaz Ali Soomro1, Fida Hussain Memon2,3, Waqas Mughal4
1College of Materials Science and Engineering, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
Membranes
|March 29, 2023
Summary
This study models proton exchange membrane fuel cells (PEMFCs) to optimize green energy performance. Findings show that while higher temperatures decrease current density, optimal operating pressure and humidity enhance PEMFC efficiency.
Area of Science:
- Electrochemistry
- Green Energy Technologies
- Computational Fluid Dynamics
Background:
- Proton exchange membrane fuel cells (PEMFCs) are crucial for sustainable energy due to low emissions.
- Optimizing PEMFC performance is key to their widespread adoption in green energy applications.
- Understanding the impact of operational parameters on PEMFC efficiency is an active research area.
Purpose of the Study:
- To develop a 3D computational fluid dynamics (CFD) model for PEMFCs.
- To investigate the influence of temperature, pressure, and humidity on PEMFC performance.
- To identify optimal operating conditions for enhanced PEMFC current density.
Main Methods:
- Development of a three-dimensional computational fluid dynamics (CFD) model.
- Utilized literature values for temperature, pressure, relative humidity, exchange coefficient, reference current density (RCD), and gas diffusion layer (GDL) porosity.
- Simulated various operational conditions to analyze their effect on cell performance.
Main Results:
- Cell performance is significantly improved by adjusting temperature and operating pressure.
- Increasing temperature leads to a degradation in current density, with a 28% decrease observed from 323 K to 353 K.
- Fully humidified gas in the channel increased current density by 10%, and a 19% increase in RCD yielded similar improvements.
Conclusions:
- Optimizing operating temperature and pressure can enhance PEMFC performance.
- Lower operating temperatures are preferable for maximizing current density.
- Proper gas humidification and reference current density are critical for efficient PEMFC operation.
