Das Projekt "Pore network modeling of fluid transport in loop heat pipe" wird vom Umweltbundesamt gefördert und von Universität Magdeburg, Institut für Verfahrenstechnik, Lehrstuhl Thermische Verfahrenstechnik durchgeführt. Evaporation at a hot-spot and condensation at a cold-spot can transport heat with a higher effective thermal conductivity than that of any existing material. This principle in used in so-called heat pipes. Here, a specific type of heat-pipe evaporator is considered, which involves evaporation out of a wet porous wick in contact with a hot fin into vapor transportation grooves. Pore network models are used for simulating transport phenomena and liquid distribution in the wick, aiming at the identification of optimal operating conditions and wick structures.
Das Projekt "Convective drying of PEM fuel cell with gas purge flow" wird vom Umweltbundesamt gefördert und von Universität Magdeburg, Institut für Verfahrenstechnik, Lehrstuhl Thermische Verfahrenstechnik durchgeführt. Water management in the gas diffusion layer of a PEM fuel cell is of essential importance for performance and reliability. Since the porous layer is very thin, the use of discrete approaches is necessary for accurate simulation. To this purpose, pore network models are developed and applied, with emphasis on drying by means of a gas purge flow.