TY - CHAP A1 - Findeisen, Alexander T1 - Analysis of corrosion behaviour of materials in oxyfuel fired power plants Y1 - 2008 ER - TY - CHAP A1 - Menke, Dominik A1 - Hammer, K. A1 - Sattler, E. A1 - Walter, E. T1 - Analyse, Bewertung und Verbesserung der technischen Zuverlässigkeit des Heizkraftwerkes Cottbus T2 - Verbrennung und Feuerungen, Tagung Cottbus, 9. und 10. September 2003, 21. Deutscher Flammentag Y1 - 2003 SN - 3-18-091750-4 SP - 93 EP - 98 PB - VDI-Verlag CY - Düsseldorf ER - TY - GEN A1 - Voigt, André A1 - Fischer, Ulrich A1 - Tannert, Daniel A1 - Krautz, Hans Joachim T1 - Analyse erneuerbarer P2H2 Energiesystemkonfigurationen unter Verwendung von Matlab T2 - Nutzung regenerativer Energiequellen und Wasserstofftechnik 2017 ; 24. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 09. bis 11. November 2017 Y1 - 2017 SN - 978-3-9817740-3-0 SP - 143 EP - 147 PB - HOST - Hochschule Stralsund CY - Stralsund ER - TY - CHAP A1 - Tappe, Stephanie A1 - Krautz, Hans Joachim T1 - An experimental approach to the kinetics of the combustion in O2/CO2-atmospheres Y1 - 2009 ER - TY - CHAP A1 - Tappe, Stephanie A1 - Krautz, Hans Joachim T1 - ALVA 20: a 20 kWth atmospheric laboratory test facility to investigate the combustion behaviour under "close-to-reality" conditions Y1 - 2009 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 - CHAP A1 - Tappe, Stephanie A1 - Krautz, Hans Joachim T1 - ALVA 20 - Eine Atmosphärische Laborverbrennungsanlage zur Bestimmung der Verbrennungskinetik unter Oxyfuel-Bedingungen Y1 - 2007 ER - TY - CHAP A1 - Ziems, Christian A1 - Krautz, Hans Joachim T1 - Alkalische Elektrolyse - Kernkomponente eines Hybridkraftwerks im Kontext Power to Gas Y1 - 2012 ER - TY - CHAP A1 - Ziems, Christian A1 - Krautz, Hans Joachim T1 - Alkalische Druckelektrolyse - Schlüsseltechnologie für zukünftige Energie- und Speicherkonzepte T2 - 4. Energiefachtagung, Cottbus, 2012 Y1 - 2012 ER - TY - CHAP A1 - Ziems, Christian A1 - Tannert, Daniel A1 - Krautz, Hans Joachim T1 - Alkalische Druckelektrolyse - Projektvorstellung und Modellansätze zur Simulation Y1 - 2011 ER - TY - CHAP A1 - Wenske, Michael A1 - Tillmann, Christine A1 - Krautz, Hans Joachim T1 - Aktuelle Entwicklungen der alkalischen Elektrolyse T2 - 4. Energiefachtagung, Cottbus, 2012 Y1 - 2012 ER - TY - CHAP A1 - Ifwer, Karin A1 - Wolf, Jens A1 - Anheden, Marie A1 - Sarunac, Nenad A1 - Bullinger, Charlie A1 - Ness, Marc A1 - Höhne, Olaf T1 - Air/Nitrogen lignite dryer as an alternative to a stream dryer in a power plant using oxyfuel technique for CO2 capture Y1 - 2008 ER - TY - THES A1 - Missagia, Bruna T1 - Agricultural and forestry residues for decentralized energy generation in Brazil Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-25180 ER - TY - GEN A1 - Missagia, Bruna A1 - Ferreira Silva Correa, Mauricio A1 - Krautz, Hans Joachim A1 - Ay, Peter A1 - Schluchter, Wolfgang T1 - Agricultural and forestry residues as an alternative energy source for Brazil - the production of biomass pellets Y1 - 2009 ER - TY - GEN A1 - Sharma, Prerana A1 - Röntzsch, Lars A1 - Shahi, Vinod K. T1 - Advancements towards optimization of metal–organic framework-based polymer electrolyte membranes for aqueous redox flow batteries T2 - Journal of materials chemistry : A, materials for energy and sustainability N2 - Aqueous redox flow batteries (ARFBs) are considered a potential technology for large-scale energy storage owing to their eco-friendliness, high current density, and tuneable capacity. Polymer electrolyte membranes (PEMs) are vital components of ARFB, but they suffer from significant capacity/efficiency deterioration due to a lack of advancement in structural framing. To enhance the effectiveness of ARFBs, various membrane types have been optimized. However, the development of an efficient PEM remains a significant problem. Metal–organic frameworks (MOFs) made up of metal sites and organic linkers have gained significant scientific interest. As a result of their large surface area, adjustable pore diameters, and customized functionality, MOF-based PEMs are regarded as effective separators for ARFB. This review covers the state of the art MOF-based PEMs as ARFB separators. In recent years, significant efforts have been made to utilize the unique characteristics of MOFs as they not only improve the conductivity (attributed to their 3D channel structure) and gradient distribution in the polymer framework but also stabilize and mitigate active species cross-over by regulating the effective pore size. The aforementioned tactics can stimulate more research on energy storage technologies and provide future insight into the development and design of size-sieving separators for ARFB. Y1 - 2025 U6 - https://doi.org/10.1039/D4TA08720H SN - 2050-7488 VL - 13 IS - 17 SP - 11952 EP - 11988 PB - Royal Society of Chemistry (RSC) CY - London ER - TY - CHAP A1 - Schierack, Frank A1 - Krautz, Hans Joachim A1 - Priesmeier, U. A1 - Nies, T. T1 - Advancement of circulating pressurized fluidized bed combustion up to plants of the 2nd Generation Y1 - 2000 SN - 3-18-091535-9 ER - TY - GEN A1 - Sakkas, Nikolaos P. A1 - Gillung, Frank A1 - Thummar, Krunalkumar A1 - Abang, Roger A1 - Röntzsch, Lars T1 - Advanced pressurized alkaline water electrolysis at high temperatures up to 130 °C T2 - International journal of hydrogen energy N2 - Operating alkaline water electrolysers above 100 °C improves electrolyte conductivity and reaction kinetics significantly. To examine alkaline water electrolysis in this area in more detail a high-temperature pressurized test rig is designed and constructed. Nickel (Ni) foam electrodes coated with Raney nickel (Raney Ni) or nickel manganese (NiMn) and expanded Ni mesh electrodes coated with nickel(II) oxide (NiO) are utilized and the effect of electrolyte flow rate, electrode structure, pressure and temperature variation on the cell performance at temperatures up to 130 °C and pressures up to 16 bar are investigated. At the maximum current density of 1.67 A/cm2, 110 °C and 16 bar the electrode combination of Raney Ni coated Ni foam as cathode and NiO coated expanded Ni mesh electrode as anode attain the best outcome with a cell voltage of 2.29 V. In a 70 h duration test three-dimensional (3D) Ni foam electrodes with Raney Ni cathode and NiMn anode catalyst show a moderate cell degradation of 9.26 μV/h. KW - Hydrogen production KW - Alkaline water electrolysis KW - 3D electrodes KW - High temperature operation KW - Pressurized operation Y1 - 2025 U6 - https://doi.org/10.1016/j.ijhydene.2025.150075 SN - 0360-3199 VL - 149 SP - 1 EP - 12 PB - Elsevier BV CY - Amsterdam ER - TY - GEN A1 - Sampangi, Shiva Kumar A1 - Jarubula, Charath Krishna A1 - Elasmar, Mohamed A1 - Röntzsch, Lars T1 - Advanced anion exchange membrane electrolyser with 360 cm² active cell area T2 - EFCF 2025 : Fuel Cells, Electrolysers & H2 Processing N2 - Anion Exchange Membrane Water Electrolysis (AEMWE) has emerged as a promising technology for generating green hydrogen, particularly using intermittent renewable energy sources. AEMWE offers a compelling opportunity for cost-effective and sustainable hydrogen production by combining the advantages of traditional alkaline water electrolysis, such as the use of abundant and low-cost catalysts, with the benefits of Proton Exchange Membrane (PEM) electrolysis, which includes membrane separation with pure or low-concentration alkaline water and operation at high current densities. However, the widespread commercialization of AEMWE remains in its early stages, with small-scale active cell areas (less than 300 cm²) and ongoing challenges related to performance and durability. Consequently, it is vital to develop high-performance, durable AEMWE cells with larger active areas to facilitate the broader adoption of this technology. This contribution presents our recent progress in AEMWE, focusing on the development of cells with an active area of up to 360 cm². In particular, we are advancing AEMWE technology to Technology Readiness Level (TRL) 5/6, incorporating precious metal-free catalysts and advanced membranes to enhance the flexibility and efficiency of hydrogen production. As part of this effort, we have designed and experimentally tested a 100 cm² AEMWE cell and conceptualized and designed a 4-kW short-stack with a total active cell area of 1800 cm², as shown in Figure. 1, for high-pressure operation at 30 bar. Our ongoing efforts includes the laboratory testing of this newly designed stack at high pressure operation and evaluating its electrochemical performance and durability up to 1,000 h continuous operation using precious metal-free electrocatalysts. Y1 - 2025 U6 - https://doi.org/10.5281/zenodo.17244119 SP - 1 EP - 6 PB - European Fuel Cell Forum AG CY - Luzern ER - TY - CHAP A1 - Walter, E. A1 - Almhem, P. A1 - Krautz, Hans Joachim T1 - A Lignite Fired Combined Cycle Heat and Power Plant using Presssurized Fluidized Bed Combustion Y1 - 1997 ER - TY - GEN A1 - Dahash, Abdulrahman A1 - Mieck, Sebastian A1 - Ochs, Fabian A1 - Krautz, Hans Joachim T1 - A comparative study of two simulation tools for the technical feasibility in terms of modeling district heating systems: An optimization case study T2 - Simulation Modelling Practice and Theory N2 - District heating dynamic models arise as an alternative approach to in-situ experimental investigations. The main advantage of dynamic modeling and simulation is the possibility to avoid technical and operational risks that might occur during in-situ experimental investigations (e.g. heat demand is not met, damages in the energy systems etc.). Within this study, the authors present two models for an existing district heating system in Cottbus, Germany. One model is developed using the tool EBSILON Professional, while the other one is developed using the Simscape toolbox for physical modeling in Matlab/Simulink. The models were experimentally validated against measured data from the considered district heating system. The results show that the Simscape model has a better fit and better response than the EBSILON model. Yet, some discrepancies were found between the measured and the simulated data and, therefore, the uncertainties of the models were addressed. A comparative study between both tools is presented. The EBSILON models permit only unidirectional flow, whereas the Simscape toolbox permits reverse flow. Nevertheless, the EBSILON model outperforms the Simscape model in computation time. In addition, this study presents an approach for dynamic thermo-hydraulic modeling of district heating networks. This approach is utilized to examine the role of district heating networks as heat storage as an optimization configuration. The numerical results show less start-ups for additional heat sources. Yet, higher heat losses from the network are observed due to the installation of unburied pipelines. KW - Dynamic thermo-hydraulic modeling and simulation KW - Simscape KW - EBSILON Professional KW - District heating systems KW - Heating network as heat storage Y1 - 2019 U6 - https://doi.org/10.1016/j.simpat.2018.11.008 SN - 1569-190X VL - 91 SP - 48 EP - 68 ER - TY - CHAP A1 - Krautz, Hans Joachim T1 - "Ausblick auf zukünftige Entwicklungen der Braunkohle-Kraftwerkstechnologien" Y1 - 2002 ER -