@article{KronhardtAlexopoulosReisseletal.2014,
  author    = {Kronhardt, Valentina and Alexopoulos, Spiros and Reißel, Martin and Sattler, Johannes, Christoph and Hoffschmidt, Bernhard and H{\"a}nel, Matthias and Doerbeck, Till},
  title     = {High-temperature thermal storage system for solar tower power plants with open-volumetric air receiver simulation and energy balancing of a discretized model},
  series = {Energy procedia},
  volume    = {49},
  journal   = {Energy procedia},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1876-6102 (E-Journal) ; 1876-6102 (Print)},
  doi       = {10.1016/j.egypro.2014.03.094},
  pages     = {870 -- 877},
  year      = {2014},
  abstract  = {This paper describes the modeling of a high-temperature storage system for an existing solar tower power plant with open volumetric receiver technology, which uses air as heat transfer medium (HTF). The storage system model has been developed in the simulation environment Matlab/Simulink®. The storage type under investigation is a packed bed thermal energy storage system which has the characteristics of a regenerator. Thermal energy can be stored and discharged as required via the HTF air. The air mass flow distribution is controlled by valves, and the mass flow by two blowers. The thermal storage operation strategy has a direct and significant impact on the energetic and economic efficiency of the solar tower power plants.},
  language  = {en}
}
@article{MuellerHirschfeldLambertzetal.2014,
  author    = {M{\"u}ller, Martin and Hirschfeld, Julian and Lambertz, Rita and Schulze Lohoff, Andreas and Lustfeld, Hans and Pfeifer, Heinz and Reißel, Martin},
  title     = {Validation of a novel method for detecting and stabilizing malfunctioning areas in fuel cell stacks},
  series = {Journal of power sources},
  volume    = {272},
  journal   = {Journal of power sources},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1873-2755 (E-Journal); 0378-7753 (Print)},
  doi       = {10.1016/j.jpowsour.2014.08.045},
  pages     = {225 -- 232},
  year      = {2014},
  abstract  = {In this paper a setup for detecting malfunctioning areas of MEAs in fuel cell stacks is described. Malfunctioning areas generate electric cross currents inside bipolar plates. To exploit this we suggest bipolar plates consisting not of two but of three layers. The third one is a highly conducting layer and segmented such that the cross currents move along the segments to the surface of the stack where they can be measured by an inductive sensor. With this information a realistic model can be used to detect the malfunctioning area. Furthermore the third layer will prevent any current inhomogeneity of a malfunctioning cell to spread to neighbouring cells in the stack. In this work the results of measurements in a realistic cell setup will be compared with the results obtained in simulation studies with the same configuration. The basis for the comparison is the reliable characterisation of the electrical properties of the cell components and the implication of these results into the simulation model. The experimental studies will also show the limits in the maximum number of segments, which can be used for a reliable detection of cross currents.},
  language  = {en}
}
@article{HafnerDemetzWeickertetal.2014,
  author    = {Hafner, David and Demetz, Oliver and Weickert, Joachim and Reißel, Martin},
  title     = {Mathematical Foundations and Generalisations of the Census Transform for Robust Optic Flow Computation},
  series = {Journal of Mathematical Imaging and Vision},
  journal   = {Journal of Mathematical Imaging and Vision},
  publisher = {Springer},
  address   = {New York},
  issn      = {1573-7683 (Online)},
  doi       = {10.1007/s10851-014-0529-9},
  year      = {2014},
  language  = {en}
}