Journal Article

FZJ-2017-04900

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Stability Issues for Fuel Cell Models in the Activation and Concentration Regimes

Beale, S. (Corresponding author)FZJ* ; Reimer, U.FZJ* ; Froning, D.FZJ* ; Jasak, H. ; Andersson, M.FZJ* ; Pharoah, J. G. ; Lehnert, W.FZJ*RWTH*

2018
ASME New York, NY

This record in other databases:  

Please use a persistent id in citations: doi:10.1115/1.4039858

Abstract: Code stability is a matter of concern for three-dimensional (3D) fuel cell models operating both at high current density and at high cell voltage. An idealized mathematical model of a fuel cell should converge for all potentiostatic or galvanostatic boundary conditions ranging from open circuit to closed circuit. Many fail to do so, due to (i) fuel or oxygen starvation causing divergence as local partial pressures and mass fractions of fuel or oxidant fall to near zero and (ii) nonlinearities in the Nernst and Butler–Volmer equations near open-circuit conditions. This paper describes in detail, specific numerical methods used to improve the stability of a previously existing fuel cell performance calculation procedure, at both low and high current densities. Four specific techniques are identified. A straight channel operating as a (i) solid oxide and (ii) polymer electrolyte membrane fuel cell is used to illustrate the efficacy of the modifications.

---

Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-3)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)

Appears in the scientific report 2018

---

Database coverage:
Current Contents - Engineering, Computing and Technology ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---