Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1-30 |
| Seitenumfang | 30 |
| Fachzeitschrift | Journal of Non-Equilibrium Thermodynamics |
| Jahrgang | 42 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - Jan. 2017 |
Abstract
A modeling study on a polymer electrolyte membrane fuel cell by means of non-equilibrium thermodynamics is presented. The developed model considers a one-dimensional cell in steady-state operation. The temperature, concentration and electric potential profiles are calculated for every domain of the cell. While the gas diffusion and the catalyst layers are calculated with established classical modeling approaches, the transport processes in the membrane are calculated with the phenomenological equations as dictated by the non-equilibrium thermodynamics. This approach is especially instructive for the membrane as the coupled transport mechanisms are dominant. The needed phenomenological coefficients are approximated on the base of conventional transport coefficients. Knowing the fluxes and their intrinsic corresponding forces, the local entropy production rate is calculated. Accordingly, the different loss mechanisms can be detected and quantified, which is important for cell and stack optimization.
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in: Journal of Non-Equilibrium Thermodynamics, Jahrgang 42, Nr. 1, 01.2017, S. 1-30.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Local entropy production rates in a polymer electrolyte membrane fuel cell
AU - Siemer, Marc
AU - Marquardt, Tobias
AU - Huerta, Gerardo Valadez
AU - Kabelac, Stephan
N1 - Publisher Copyright: © 2017 by De Gruyter Mouton 2017. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/1
Y1 - 2017/1
N2 - A modeling study on a polymer electrolyte membrane fuel cell by means of non-equilibrium thermodynamics is presented. The developed model considers a one-dimensional cell in steady-state operation. The temperature, concentration and electric potential profiles are calculated for every domain of the cell. While the gas diffusion and the catalyst layers are calculated with established classical modeling approaches, the transport processes in the membrane are calculated with the phenomenological equations as dictated by the non-equilibrium thermodynamics. This approach is especially instructive for the membrane as the coupled transport mechanisms are dominant. The needed phenomenological coefficients are approximated on the base of conventional transport coefficients. Knowing the fluxes and their intrinsic corresponding forces, the local entropy production rate is calculated. Accordingly, the different loss mechanisms can be detected and quantified, which is important for cell and stack optimization.
AB - A modeling study on a polymer electrolyte membrane fuel cell by means of non-equilibrium thermodynamics is presented. The developed model considers a one-dimensional cell in steady-state operation. The temperature, concentration and electric potential profiles are calculated for every domain of the cell. While the gas diffusion and the catalyst layers are calculated with established classical modeling approaches, the transport processes in the membrane are calculated with the phenomenological equations as dictated by the non-equilibrium thermodynamics. This approach is especially instructive for the membrane as the coupled transport mechanisms are dominant. The needed phenomenological coefficients are approximated on the base of conventional transport coefficients. Knowing the fluxes and their intrinsic corresponding forces, the local entropy production rate is calculated. Accordingly, the different loss mechanisms can be detected and quantified, which is important for cell and stack optimization.
KW - entropy production
KW - fuel cell
KW - non-equilibrium thermodynamics
KW - phenomenological equations
UR - http://www.scopus.com/inward/record.url?scp=85009759054&partnerID=8YFLogxK
U2 - 10.1515/jnet-2016-0025
DO - 10.1515/jnet-2016-0025
M3 - Article
AN - SCOPUS:85009759054
VL - 42
SP - 1
EP - 30
JO - Journal of Non-Equilibrium Thermodynamics
JF - Journal of Non-Equilibrium Thermodynamics
SN - 0340-0204
IS - 1
ER -