Details
| Original language | English |
|---|---|
| Article number | 872 |
| Journal | Entropy |
| Volume | 26 |
| Issue number | 10 |
| Publication status | Published - 17 Oct 2024 |
Abstract
In this study, the transported entropy of ions for 8YSZ and 10Sc1CeSZ electrolytes was experimentally determined to enable precise modeling of heat transport in solid oxide cells (SOCs). The Peltier coefficient, crucial for thermal management, was directly calculated, highlighting reversible heat transport effects in the cell. While data for 8YSZ are available in the literature, providing a basis for comparison, the results for 10Sc1CeSZ show slightly smaller Seebeck coefficients but higher transported ion entropies. Specifically, at (Formula presented.) and an oxygen partial pressure of (Formula presented.) bar, values of (Formula presented.) J/K·F for 10Sc1CeSZ and (Formula presented.) J/K·F for 8YSZ were obtained. The transported entropy was also validated through theoretical calculations and showed minimal deviations when comparing different cell operation modes (O2||O2−||O2 and H2, H2O||O2−||O2). The influence of the transported entropy of the ions on the total heat generation and the partial heat generation at the electrodes is shown. The temperature has the greatest influence on heat generation, whereby the ion entropy also plays a role. Finally, the Peltier coefficients of 8YSZ for all homogeneous phases agree with the literature values.
Keywords
- electrodes heat generation, non-equilibrium thermodynamics (NET), Peltier coefficient, reversible heat effects, Seebeck coefficient, solid oxide cell (SOC), transported entropy of ions
ASJC Scopus subject areas
- Computer Science(all)
- Information Systems
- Mathematics(all)
- Mathematical Physics
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
- Engineering(all)
- Electrical and Electronic Engineering
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In: Entropy, Vol. 26, No. 10, 872, 17.10.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Transported Entropy of Ions and Peltier Coefficients in 8YSZ and 10Sc1CeSZ Electrolytes for Solid Oxide Cells
AU - Gedik, Aydan
AU - Kabelac, Stephan
N1 - Publisher Copyright: © 2024 by the authors.
PY - 2024/10/17
Y1 - 2024/10/17
N2 - In this study, the transported entropy of ions for 8YSZ and 10Sc1CeSZ electrolytes was experimentally determined to enable precise modeling of heat transport in solid oxide cells (SOCs). The Peltier coefficient, crucial for thermal management, was directly calculated, highlighting reversible heat transport effects in the cell. While data for 8YSZ are available in the literature, providing a basis for comparison, the results for 10Sc1CeSZ show slightly smaller Seebeck coefficients but higher transported ion entropies. Specifically, at (Formula presented.) and an oxygen partial pressure of (Formula presented.) bar, values of (Formula presented.) J/K·F for 10Sc1CeSZ and (Formula presented.) J/K·F for 8YSZ were obtained. The transported entropy was also validated through theoretical calculations and showed minimal deviations when comparing different cell operation modes (O2||O2−||O2 and H2, H2O||O2−||O2). The influence of the transported entropy of the ions on the total heat generation and the partial heat generation at the electrodes is shown. The temperature has the greatest influence on heat generation, whereby the ion entropy also plays a role. Finally, the Peltier coefficients of 8YSZ for all homogeneous phases agree with the literature values.
AB - In this study, the transported entropy of ions for 8YSZ and 10Sc1CeSZ electrolytes was experimentally determined to enable precise modeling of heat transport in solid oxide cells (SOCs). The Peltier coefficient, crucial for thermal management, was directly calculated, highlighting reversible heat transport effects in the cell. While data for 8YSZ are available in the literature, providing a basis for comparison, the results for 10Sc1CeSZ show slightly smaller Seebeck coefficients but higher transported ion entropies. Specifically, at (Formula presented.) and an oxygen partial pressure of (Formula presented.) bar, values of (Formula presented.) J/K·F for 10Sc1CeSZ and (Formula presented.) J/K·F for 8YSZ were obtained. The transported entropy was also validated through theoretical calculations and showed minimal deviations when comparing different cell operation modes (O2||O2−||O2 and H2, H2O||O2−||O2). The influence of the transported entropy of the ions on the total heat generation and the partial heat generation at the electrodes is shown. The temperature has the greatest influence on heat generation, whereby the ion entropy also plays a role. Finally, the Peltier coefficients of 8YSZ for all homogeneous phases agree with the literature values.
KW - electrodes heat generation
KW - non-equilibrium thermodynamics (NET)
KW - Peltier coefficient
KW - reversible heat effects
KW - Seebeck coefficient
KW - solid oxide cell (SOC)
KW - transported entropy of ions
UR - http://www.scopus.com/inward/record.url?scp=85207683416&partnerID=8YFLogxK
U2 - 10.3390/e26100872
DO - 10.3390/e26100872
M3 - Article
AN - SCOPUS:85207683416
VL - 26
JO - Entropy
JF - Entropy
SN - 1099-4300
IS - 10
M1 - 872
ER -