TY - GEN A1 - Akay, Ömer A1 - Bashkatov, Aleksandr A1 - Coy, Emerson A1 - Eckert, Kerstin A1 - Einarsrud, Kristian Etienne A1 - Friedrich, Andreas A1 - Kimmel, Benjamin A1 - Loos, Stefan A1 - Mutschke, Gerd A1 - Röntzsch, Lars A1 - Symes, Mark D. A1 - Yang, Xuegeng A1 - Brinkert, Katharina T1 - Electrolysis in reduced gravitational environments: current research perspectives and future applications T2 - npj Microgravity N2 - Electrochemical energy conversion technologies play a crucial role in space missions, for example, in the Environmental Control and Life Support System (ECLSS) on the International Space Station (ISS). They are also vitally important for future long-term space travel for oxygen, fuel and chemical production, where a re-supply of resources from Earth is not possible. Here, we provide an overview of currently existing electrolytic energy conversion technologies for space applications such as proton exchange membrane (PEM) and alkaline electrolyzer systems. We discuss the governing interfacial processes in these devices influenced by reduced gravitation and provide an outlook on future applications of electrolysis systems in, e.g., in-situ resource utilization (ISRU) technologies. A perspective of computational modelling to predict the impact of the reduced gravitational environment on governing electrochemical processes is also discussed and experimental suggestions to better understand efficiency-impacting processes such as gas bubble formation and detachment in reduced gravitational environments are outlined. KW - Elektrolyse KW - electrolysis Y1 - 2022 UR - https://www.nature.com/articles/s41526-022-00239-y#citeas U6 - https://doi.org/10.1038/s41526-022-00239-y SN - 2373-8065 VL - 8 ER - TY - GEN A1 - Ahmels, Peter A1 - Voß, Ulrike A1 - Gago, Aldo A1 - Lettenmeier, Philipp A1 - Voglstätter, Christopher A1 - Schmitz, Steffen A1 - Kleinickel, Cindy A1 - Barsch, Markus A1 - Rockmann, Rico A1 - Pumpa, Martin A1 - Fischer, Ulrich A1 - Voigt, André T1 - Wasserstoff zur Windenergiespeicherung – Ergebnisse des Projektes WESpe T2 - HZwei: das Magazin für Wasserstoff und Brennstoffzellen KW - Wasserstoff KW - Energiespeicherung Y1 - 2018 UR - https://www.hzwei.info/wp-content/uploads/2019/03/HZwei_April_2018.pdf SN - 1862-393X VL - 18 IS - 2 SP - 28 EP - 30 ER - TY - CHAP A1 - Aha, Ulrich A1 - Manig, André A1 - Krautz, Hans Joachim T1 - Maintenance optimisation for the next generation of power plants Y1 - 2011 ER - TY - CHAP A1 - Aha, Ulrich A1 - Manig, André A1 - Krautz, Hans Joachim ED - Bérenguer, Christophe T1 - Modelling and maintenance optimisation for the next generation of power plants T2 - Advances in safety, reliability and risk management, proceedings of the European Safety and reliability Conference, ESREL 2011, Troyes, France, 18 - 22 September 2011 Y1 - 2011 SN - 978-0-415-68379-1 PB - CRC Press CY - Hoboken ER - TY - CHAP A1 - Aha, Ulrich A1 - Koch, Alexander A1 - Krautz, Hans Joachim T1 - Finding the optimal power plant maintenance strategy with fuzzy input data T2 - 11th International Probabilistic Safety Assessment and Management Conference and the Annual European Safety and Reliability Conference 2012, (PSAM11 ESREL 2012), Helsinki, Finland 25 - 29 June 2012, Vol. 1 Y1 - 2012 SN - 978-1-62276-436-5 SP - 341 EP - 347 PB - IAPSAM & ESRA CY - Red Hook, NY ER - TY - GEN A1 - Aha, Ulrich A1 - Findeisen, Alexander A1 - Krautz, Hans Joachim A1 - Kahlert, Joachim T1 - Korrosion und Instandhaltungsoptimierung CO2-armer Braunkohlekraftwerke unter geänderten Prozessbedingungen und -parametern Y1 - 2010 ER - TY - GEN A1 - Aha, Ulrich A1 - Findeisen, Alexander A1 - Krautz, Hans Joachim T1 - Maintenance optimization for large coal-fired power plants Y1 - 2011 ER - TY - CHAP A1 - Aha, Ulrich A1 - Findeisen, Alexander A1 - Krautz, Hans Joachim T1 - Korrosion und Instandhaltungsoptimierung unter geänderten Prozessbedingungen und -parametern Y1 - 2010 ER - TY - CHAP A1 - Aha, Ulrich A1 - Findeisen, Alexander A1 - Krautz, Hans Joachim T1 - Maintenance optimisation of large coal-fired power plants Y1 - 2010 ER - TY - GEN A1 - Aha, Ulrich A1 - Findeisen, Alexander A1 - Krautz, Hans Joachim T1 - INSTRA - eine Software für die Instandhaltungsoptimierung Y1 - 2009 ER - TY - CHAP A1 - Aha, Ulrich T1 - Auswirkungen unscharfer Eingangsdaten auf Verfügbarkeitssimulation und Instandhaltungsoptimierung Y1 - 2009 ER - TY - GEN A1 - Abang, Roger Atini A1 - Weiß, Sabine A1 - Krautz, Hans Joachim T1 - Impact of increased power plant cycling on the oxidation and corrosion of coal-fired superheater materials T2 - Fuel N2 - As power generation from variable renewable energy sources such as wind and solar power continues to increase in the future, fewer baseload power plants will be needed. As a result, high operational flexibility is becoming a vital requirement for conventional power plants to allow for the smooth integration of the variable renewable energy sources (v-RES) into the grid. To understand the impact of high operational flexibility (increased cycling) for coal-fired power plant materials, five commercial coal boiler superheater and reheater materials were investigated under isothermal and cyclic conditions for 1000 h each. The candidate alloys investigated were: T91, VM12-SHC, TP347-HFG, DMV304 HCu and DMV310 N. The results (weight change kinetics and metallographic analysis) after exposure at a metal surface temperature of 650 °C clearly showed the impact of increased flexibility on the corrosion and oxidation of the materials. Oxide growth (weight gain), metal loss, oxide spallation, and grain boundary attack were found to be more severe under cyclic conditions than under isothermal conditions. KW - Power plant flexibility, Isothermal oxidation, Cyclic oxidation, High temperature corrosion, Superheaters Y1 - 2018 U6 - https://doi.org/10.1016/j.fuel.2018.02.047 SN - 0016-2361 VL - 2018 IS - 220 SP - 521 EP - 534 ER - TY - GEN A1 - Abang, Roger Atini A1 - Lisk, Alexander A1 - Krautz, Hans Joachim T1 - Fireside corrosion of superheater materials under oxy-coal firing conditions T2 - Energy Procedia N2 - The present study investigates the fireside corrosion behavior of selected superheater materials, namely: T24, P92, VM12-SHC, A800HT, and 7RE10 under oxy-coal combustion atmospheres. Data on mass change, scale thickness, metal loss, surface morphology and micro-structural characteristics of corrosion products were obtained. The alloy specimens were analyzed by SEM-EDX, light microscopy and X-Ray diffraction techniques. The results after 2000 hours of exposure at a metal surface temperature of 600 °C indicate that metal wastage increased with decreasing Cr-content under oxy-coal conditions. Y1 - 2013 U6 - https://doi.org/10.1016/j.egypro.2013.08.035 SN - 1876-6102 VL - 40 SP - 304 EP - 311 ER - TY - CHAP A1 - Abang, Roger Atini A1 - Findeisen, Alexander A1 - Krautz, Hans Joachim T1 - Corrosion Investigation of Materials under Oxyfuel Firing Conditions Y1 - 2010 ER - TY - THES A1 - Abang, Roger Atini T1 - Thermodynamic modeling and experimental investigations of high temperature corrosion and oxidation due to increased power plant cycling KW - Cycling KW - Flexible generation KW - High temperature corrosion; Oxidation KW - Oxidation KW - Thermo-chemical modeling Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus4-40032 ER -