Dresden 2011 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 28: Statistical Physics far from Equilibrium

DY 28.11: Vortrag

Donnerstag, 17. März 2011, 13:00–13:15, HÜL 186

Endoreversible Modeling using the example of fuel cells — •Katharina Wagner and Karl Heinz Hoffmann — Institut für Physik, TU Chemnitz, 09107 Chemnitz, Germany

In endoreversible thermodynamics irreversible processes and systems are split into reversible subsystems and interactions in between them. Subsystems can either be reservoirs storing energy and extensive quantities or engines transferring energy between different extensive quantities. The irreversibilities of the system are completely described by the interactions between the reversible subsystems. This separation leads to a block of balance equations, which characterize the reversible subsystems, and transport equations, which describe the interactions. The entropy production can thus be localized within the whole system. Using the formalism of endoreversible thermodynamics a PEM fuel cell is modeled and the power output as well as the efficiency are investigated.