A nonisothermal PEM fuel cell model including two water transport mechanisms in the membrane (2008)
Steinkamp, K., Schumacher, J.O., Goldsmith, F., Ohlberger, M., Ziegler, C.
A dynamic two-phase flow model for proton exchange membrane fuel cells is presented. The two-dimensional model includes the two-phase flow of water (gaseous and liquid) in the gas diffusion layers...
Center for Scientific Computation And Mathematical Modeling (2007)
K. Kühn, M. Ohlberger, J. O. Schumacher, C. Ziegler, R. Klöfkorn, Karsten Kühn Ab, ...
A dynamic two-phase flow model of proton exchange membrane fuel cells
Gerteisen, D., Hakenjos, A., Schumacher, J.O.
A one-dimensional model of the PEM fuel cell cathode is developed to analyse ac impedance spectra and polarisation curves. The porous gas diffusion electrode is assumed to consist of a network of...
Two-phase dynamic modeling of PEMFCs and simulation of cyclo-voltammograms (2005)
Ziegler, C., Yu, H.M., Schumacher, J.O.
A mathematical model is developed that is based on a coupled system of partial differential equations. The model contains a dynamic and two-phase description of the proton exchange membrane fuel cell...
Kornhaas, M., Schumacher, J.O., Gerteisen, D.
Diplomarbeit an der Universität Stuttgart, Institut für Aerodynamik und Gasdynamik (IAG). Durchgeführt am Fraunhofer-Institut für Solare Energiesysteme -ISE-, Freiburg.
Modeling planar and self-breathing fuel cells for use in electronic devices (2004)
Ziegler, C., Schmitz, A., Tranitz, M., Fontes, E., Schumacher, J.O.
A theoretical study of a planar and self-breathing fuel cell is presented. This work contains the development of a mathematical model for planar self-breathing fuel cells, the validation of the...
Control of miniature proton exchange membrane fuel cells based on fuzzy logic (2004)
Schumacher, J.O., Gemmar, P., Denne, M., Zedda, M., Stueber, M.
A control strategy is presented in this paper which is suitable for miniature hydrogen/air proton-exchange membrane (PEM) fuel cells. The control approach is based on process modelling using fuzzy...
Hakenjos, A., Tüber, K., Schumacher, J.O., Hebling, C.
The characterisation of a proton exchange membrane (PEM) fuel cell with a straight channel flow field design is performed. Spatially resolved current distribution measurements, at different air flow...
Modelling approach for planar self-breathing PEMFC and comparison with experimental results (2004)
Schmitz, A., Ziegler, C., Schumacher, J.O., Tranitz, M., Fontes, E., Hebling, C.
Modelling of planar self-breathing PEMFC (2003)
Schmitz, A., Ziegler, C., Schumacher, J.O., Tranitz, M., Fontes, E., Hebling, C.
A dynamic two-phase flow model of proton exchange membrane fuel cells (2003)
Kühn, K., Ohlberger, M., Schumacher, J.O., Ziegler, C., Klöfkorn, R.
PEM fuel cells for the power supply of electronic appliances (2003)
Hebling, C., Burger, B., Hakenjos, A., Hesselmann, J., Münter, H., Pócza, D., ...
Influence of the microstructure of the catalyst layer on the performance of the PEMFC cathode (2003)
Fontes, E., Schumacher, J.O., Vasileiades, N., Parhammar, O., Schmitz, A.
Analysis of rear contacted solar cell structures for cost-effective processes and materials (2000)
Dicker, J., Sölter, J., Schumacher, J.O., Glunz, S.W., Warta, W.
Screen printed and RT-processed emitters for crystalline silicon solar cells (1998)
Preu, R., Schumacher, J.O., Hahne, P., Reis, I. E., Glunz, S.W., Warta, W.