TY - JOUR A1 - Reimann, Ansgar A1 - Kohlenbach, Paul A1 - Röntzsch, Lars A1 - Schneider, Clemens T1 - Development and validation of a quasi-2D electrolysis stack model with a focus on dynamic thermal behavior JF - International Journal of Hydrogen Energy N2 - - Novel dynamic PEM stack model with focus on thermal behavior is presented. - Model incorporates gas-liquid heat transfer and pressure drop phenomena. - Electrochemical and dynamic thermal behavior is validated with experimental data. - Validation shows higher gas fraction in cooling water increases heat transfer. Maintaining a constant stack temperature and minimizing temperature gradients within the stack during operation is critical to the efficiency and durability of proton exchange membrane (PEM) electrolyzers. At the same time, the significant amount of heat released during operation provides opportunities to reuse this heat, potentially improving economic efficiency and contributing to the decarbonization of the heating sector. The design of stack temperature and heat recovery control systems requires accurate and effective models that describe the dynamic thermal behavior of the stack during load changes without being overly computationally intensive. Therefore, this paper presents a dynamic quasi-2D model of a PEM electrolysis stack that rapidly calculates these dynamic processes in a generally applicable manner. The model also incorporates phenomena such as gas and liquid crossover and pressure drop. We validated the performance of the model with experimental data from a PEM electrolysis test bench and demonstrated its accuracy in describing the electrochemical and dynamic thermal behavior. The stack voltage was simulated with a mean absolute deviation (MAD) of 0.0895 V and the anode outlet temperature with an MAD of 0.127 K, while the simulated time constants of the thermal step responses showed an MAD of 4.06 %. Y1 - 2025 U6 - https://doi.org/10.1016/j.ijhydene.2025.03.225 SN - 0360-3199 VL - 118 SP - 457 EP - 471 PB - Elsevier BV ER - TY - JOUR A1 - Tappe, Stephanie A1 - Krautz, Hans Joachim T1 - ALVA 20 - Eine Laboranlage zur Untersuchung des Verbrennungsverhaltens in einer O2/CO2-Atmosphäre Y1 - 2007 ER - TY - JOUR A1 - Rochlitz, Lisbeth A1 - Krautz, Hans Joachim T1 - Entwicklung, Untersuchung und Modellierung eines Mikroreformers als Teil eines Systems zur netzfernen Stromversorgung mit PEM-Brennstoffzellen im Bereich einiger 100 Watt Y1 - 2007 ER - TY - JOUR A1 - Kahlert, Joachim A1 - Krautz, Hans Joachim T1 - Methodik zur Ermittlung optimaler Instandhaltungsperioden unter der Bedingung unscharfer Ausgangsdaten Y1 - 2006 ER - TY - JOUR A1 - Leidich, F. U. A1 - Breitenfelder, R. A1 - Mandel, Hans A1 - Krautz, Hans Joachim A1 - Gniazdowski, M. T1 - Development of a lignite-fired power plant concept with intgrated pressurised fluidised-bed drying and fuel cells Y1 - 2005 ER - TY - JOUR A1 - Kalina, Hartmut A1 - Löffler, Steffen A1 - Krautz, Hans Joachim A1 - Möller, J. T1 - Gesamtbewertung für erneuerbare Energien möglich und sinnvoll Y1 - 2005 ER - TY - JOUR A1 - Bär, F. A1 - Müller, S. A1 - Rost, M. T1 - Effiziente Braunkohleverstromung in einer Druckwirbelschichtfeuerung mit Teilvergasung Y1 - 2004 ER - TY - JOUR A1 - Krautz, Hans Joachim T1 - CO2-freies Kraftwerk ab 2020 Y1 - 2004 ER - TY - JOUR A1 - Möller, Joachim A1 - Löffler, Steffen A1 - Menke, Dominik A1 - Kalina, Hartmut T1 - Bewertung erneuerbarer Energien im Land Brandenburg Y1 - 2003 ER - TY - JOUR A1 - Menke, Dominik A1 - Krautz, Hans Joachim T1 - Simulation of availability and process dynamics of large scale fossil fuel fired power plants Y1 - 2002 ER - TY - JOUR A1 - Griebe, Steffen A1 - Krautz, Hans Joachim A1 - Kirmse, Dietrich T1 - Mitverbrennung von Biomassen in braunkohlegefeuerten Kraftwerken Y1 - 2002 ER - TY - JOUR A1 - Kreul, Klaus-Jürgen A1 - Owczarek, Christian T1 - Erste CFD-Simulation einer Zykloidfeuerung Y1 - 2000 ER - TY - JOUR A1 - Mroz, Marcin A1 - Löffler, Steffen T1 - Moderne Kraftwerkskonzepte für fossile Brennstoffe Y1 - 2000 ER - TY - JOUR A1 - Krautz, Hans Joachim A1 - Owczarek, Christian T1 - Weiterentwicklung von Kraftwerkstechnologien auf Braunkohlebasis Y1 - 1997 ER -