Molten carbonate fuel cells are well suited for stationary power production and heat supply. In order to enhance service lifetime, hot spots, respectively, high temperature gradients inside the fuel cell have to be avoided. In conflict with that, there is the desire to achieve faster load changes while temperature gradients stay small. For the first time, optimal fast load changes have been computed numerically, including a parametric sensitivity analysis, based on a mathematical model of Heidebrecht. The mathematical model allows for the calculation of the dynamical behavior of molar fractions, molar flow densities, temperatures in gas phases, temperature in solid phase, cell voltage, and current density distribution. The dimensionless model is based on the description of physical phenomena. The numerical procedure is based on a method of line approach via spatial discretization and the solution of the resulting very large scale optimal control problem by a nonlinear programming approach.
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e-mail: kurt.chudej@uni-bayreuth.de
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May 2008
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Parametric Sensitivity Analysis of Fast Load Changes of a Dynamic MCFC Model
K. Sternberg,
K. Sternberg
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germany
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K. Chudej,
e-mail: kurt.chudej@uni-bayreuth.de
K. Chudej
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germany
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H. J. Pesch,
H. J. Pesch
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germany
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A. Rund
A. Rund
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germany
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K. Sternberg
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germany
K. Chudej
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germanye-mail: kurt.chudej@uni-bayreuth.de
H. J. Pesch
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, Germany
A. Rund
Universität Bayreuth
, Lehrstuhl für Ingenieurmathematik, 95440 Bayreuth, GermanyJ. Fuel Cell Sci. Technol. May 2008, 5(2): 021002 (6 pages)
Published Online: April 10, 2008
Article history
Received:
July 2, 2007
Revised:
January 11, 2008
Published:
April 10, 2008
Citation
Sternberg, K., Chudej, K., Pesch, H. J., and Rund, A. (April 10, 2008). "Parametric Sensitivity Analysis of Fast Load Changes of a Dynamic MCFC Model." ASME. J. Fuel Cell Sci. Technol. May 2008; 5(2): 021002. https://doi.org/10.1115/1.2885400
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