Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems |
| Untertitel | 3rd International Conference on Fuel Cell Science, Engineering and Technology. Ypsilanti, Michigan, USA. May 23–25, 2005 |
| Herausgeber (Verlag) | American Society of Mechanical Engineers(ASME) |
| Seiten | 405-411 |
| Seitenumfang | 7 |
| ISBN (Print) | 0791837645, 9780791837641 |
| Publikationsstatus | Veröffentlicht - 2005 |
| Extern publiziert | Ja |
| Veranstaltung | 3rd International Conference on Fuel Cell Science, Engineering and Technology - Ypsilanti, MI, USA / Vereinigte Staaten Dauer: 23 Mai 2005 → 25 Mai 2005 Konferenznummer: 3 |
Abstract
The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of η > 0,5 yet. Parallel to standard explanations of loss mechanisms by means of overvoltages, a thermodynamic view of addressing irreversibilities by calculating local entropy production rates is helpful. Entropy production rates are calculated by multiplying local transport fluxes with appropriate driving forces, i.e., gradients of temperature, chemical potentials and electric potentials. These gradients have to be calculated by solving the set of constitutive balance equations. Before this tedious task is done, simplified model equations have to be used. The reversible fuel cell is the starting point of analysis. Results for a one-dimensional PEM-FC are shown.
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ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems: 3rd International Conference on Fuel Cell Science, Engineering and Technology. Ypsilanti, Michigan, USA. May 23–25, 2005. American Society of Mechanical Engineers(ASME), 2005. S. 405-411 FUELCELL2005-74071.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Thermodynamic view on the loss mechanisms in PEM-fuel cells
AU - Kabelac, S.
AU - Siemer, M.
N1 - Conference code: 3
PY - 2005
Y1 - 2005
N2 - The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of η > 0,5 yet. Parallel to standard explanations of loss mechanisms by means of overvoltages, a thermodynamic view of addressing irreversibilities by calculating local entropy production rates is helpful. Entropy production rates are calculated by multiplying local transport fluxes with appropriate driving forces, i.e., gradients of temperature, chemical potentials and electric potentials. These gradients have to be calculated by solving the set of constitutive balance equations. Before this tedious task is done, simplified model equations have to be used. The reversible fuel cell is the starting point of analysis. Results for a one-dimensional PEM-FC are shown.
AB - The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of η > 0,5 yet. Parallel to standard explanations of loss mechanisms by means of overvoltages, a thermodynamic view of addressing irreversibilities by calculating local entropy production rates is helpful. Entropy production rates are calculated by multiplying local transport fluxes with appropriate driving forces, i.e., gradients of temperature, chemical potentials and electric potentials. These gradients have to be calculated by solving the set of constitutive balance equations. Before this tedious task is done, simplified model equations have to be used. The reversible fuel cell is the starting point of analysis. Results for a one-dimensional PEM-FC are shown.
UR - http://www.scopus.com/inward/record.url?scp=27744474790&partnerID=8YFLogxK
U2 - 10.1115/fuelcell2005-74071
DO - 10.1115/fuelcell2005-74071
M3 - Conference contribution
AN - SCOPUS:27744474790
SN - 0791837645
SN - 9780791837641
SP - 405
EP - 411
BT - ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
PB - American Society of Mechanical Engineers(ASME)
T2 - 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
Y2 - 23 May 2005 through 25 May 2005
ER -