Volume 13, Issue 15 (Third Special Issue 2014)                   Modares Mechanical Engineering 2014, 13(15): 38-49 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Fuel concentration impedance simulation of a planar Solid Oxide Fuel Cell. Modares Mechanical Engineering 2014; 13 (15) :38-49
URL: http://mme.modares.ac.ir/article-15-1370-en.html
Abstract:   (5629 Views)
This paper presents a transient model for planar solid oxide fuel cells anode, which allows the simulation of steady-state performance characteristics, transient operation behavior, as well as electrochemical impedance spectra. The developed model couples the mass transport with electrochemical kinetics. The 1D Navier-Stokes conservation equations and species conservation equations are used for gas transport in the anode channel, and the linear kinetic is used for the anode electrochemistry. In order to model the electrochemical impedance, a sinusoidal excitation is imposed to system of transient equations and the obtained harmonic response is used as a base for electrochemical impedance spectra simulation. In order to solve the system of the nonlinear equations, a numerical code based on finite volume method is developed and utilized. Results show that the mass transfer in channel leads to a low frequency capacitive semicircle in the Nyquist plot. Moreover, the influence of parameters such as overvoltage, temperature, velocity and hydrogen inlet concentration on the electrochemical impedance has also been studied and the results are discussed. The simulation results are in good agreement with published data.
Full-Text [PDF 1177 kb]   (2923 Downloads)    
Article Type: Research Article | Subject: Fuel Cell, Reaction & Multi-Species Flow
Received: 2013/07/6 | Accepted: 2013/11/16 | Published: 2014/02/20

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.