Details
| Original language | English |
|---|---|
| Title of host publication | Energy and the Environment |
| Subtitle of host publication | Proceedings of the International Conference on Energy and the Environment, December 2003, Shanghai, China |
| Editors | K. Chen, T.W. Tong, G. Sarlos |
| Place of Publication | Shanghai |
| Pages | 398-404 |
| Number of pages | 7 |
| Publication status | Published - 2003 |
| Externally published | Yes |
| Event | International Conference on Energy and the Environment - Shanghai, China Duration: 11 Dec 2003 → 13 Dec 2003 |
Abstract
The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of ν > 0.5 yet. Parallel to standard explanations of loss mechanisms by means of overvoltages, a thermodynamic of addressing irreversibilities by calculating local entropy production rates may be 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.
Keywords
- Entropy production rate, Exergy analysis, Fuel cells, Irreversibilities, Thermodynamics
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
Cite this
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- BibTeX
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Energy and the Environment: Proceedings of the International Conference on Energy and the Environment, December 2003, Shanghai, China. ed. / K. Chen; T.W. Tong; G. Sarlos. Shanghai, 2003. p. 398-404.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Loss mechanisms in fuel cells
AU - Siemer, M.
AU - Kabelac, S.
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2003
Y1 - 2003
N2 - The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of ν > 0.5 yet. Parallel to standard explanations of loss mechanisms by means of overvoltages, a thermodynamic of addressing irreversibilities by calculating local entropy production rates may be 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.
AB - The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of ν > 0.5 yet. Parallel to standard explanations of loss mechanisms by means of overvoltages, a thermodynamic of addressing irreversibilities by calculating local entropy production rates may be 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.
KW - Entropy production rate
KW - Exergy analysis
KW - Fuel cells
KW - Irreversibilities
KW - Thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=2642523626&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:2642523626
SN - 7532373355
SP - 398
EP - 404
BT - Energy and the Environment
A2 - Chen, K.
A2 - Tong, T.W.
A2 - Sarlos, G.
CY - Shanghai
T2 - International Conference on Energy and the Environment
Y2 - 11 December 2003 through 13 December 2003
ER -