Details
| Original language | English |
|---|---|
| Title of host publication | 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 |
| Subtitle of host publication | 3rd International Conference on Fuel Cell Science, Engineering and Technology. Ypsilanti, Michigan, USA. May 23–25, 2005 |
| Publisher | American Society of Mechanical Engineers(ASME) |
| Pages | 405-411 |
| Number of pages | 7 |
| ISBN (print) | 0791837645, 9780791837641 |
| Publication status | Published - 2005 |
| Externally published | Yes |
| Event | 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 - Ypsilanti, MI, United States Duration: 23 May 2005 → 25 May 2005 Conference number: 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.
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
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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. p. 405-411 FUELCELL2005-74071.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › 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 -