@article{KahlertKrautz, author = {Kahlert, Joachim and Krautz, Hans Joachim}, title = {Methodik zur Ermittlung optimaler Instandhaltungsperioden unter der Bedingung unscharfer Ausgangsdaten}, language = {de} } @inproceedings{KahlertKrautz, author = {Kahlert, Joachim and Krautz, Hans Joachim}, title = {Beispiele f{\"u}r Instandhaltung mit Risiko im KW Lippendorf}, language = {de} } @inproceedings{JentschHoehne, author = {Jentsch, N. and H{\"o}hne, Olaf}, title = {Druckaufgeladene Dampf-Wirbelschicht-Trocknung (DDWT): Versuchsanlage zur DDWT mit 5 t/h TBK-Durchsatz}, language = {de} } @misc{JanaChauhanMuthukumaretal., author = {Jana, Sayantan and Chauhan, Nikhil and Muthukumar, Palanisamy and R{\"o}ntzsch, Lars}, title = {Transient analysis and performance prediction of a metal hydride based thermal energy storage system with Integrated cooling and heat upgradation}, series = {Heat transfer engineering : an international journal}, journal = {Heat transfer engineering : an international journal}, publisher = {Taylor \& Francis}, address = {London}, issn = {0145-7632}, doi = {10.1080/01457632.2025.2521599}, pages = {1 -- 13}, abstract = {This work embodies a numerical model development and simulation of a metal hydride-based thermal energy storage system with integrated cooling as well heat upgradation. The concept of this system is unique as it operates on thermal drive during the energy storage cycle while during the energy release cycle it is compressor-operated. The utility of the mechanical compressor in the system is two-fold i.e., one operation mode would harness cooling, and another operation mode would fetch heat upgradation. The numerical model devised is a lumped parameter model which solves for hydrogen concentration and temperature of the linked metal hydride reactors. The proposed thermal energy storage system is of 5 MJ capacity which engages tube bundle reactor settings for both high-temperature and low-temperature hydride alloys. Each energy storage and release cycles are simulated for a fixed duration of 10000 s. For a fixed heat supply and heat recovery temperatures of 623 K and 573 K, the system offered cooling coefficient of performance in the range of 1.43-1.58 at 283-293 K. Also, approximately 77\% of the energy stored at 623 K could be retrieved at 573 K. In heat upgradation operation mode, 10-30 K temperature lift was accomplished.}, language = {en} } @inproceedings{IfwerWolfAnhedenetal., author = {Ifwer, Karin and Wolf, Jens and Anheden, Marie and Sarunac, Nenad and Bullinger, Charlie and Ness, Marc and H{\"o}hne, Olaf}, title = {Air/Nitrogen lignite dryer as an alternative to a stream dryer in a power plant using oxyfuel technique for CO2 capture}, language = {de} } @inproceedings{HoehneMartinJentschetal., author = {H{\"o}hne, Olaf and Martin, J{\"o}rg S. and Jentsch, N. and Thannh{\"a}user, L.}, title = {Druckaufgeladene Dampfwirbelschicht-Trocknung (DDWT) von Braunkohlen: Inbetriebnahme des 10 t/h-Versuchstrockner der Vattenfall Europe AG und erste Betriebsergebnisse}, language = {de} } @misc{HoehneLechnerSchreiberetal., author = {H{\"o}hne, Olaf and Lechner, Stefan and Schreiber, Matthias and Krautz, Hans Joachim}, title = {Drying of Lignite in a Pressurized Steam Fluidized Bed - Theory and Experiments}, language = {en} } @phdthesis{Hoehne, author = {H{\"o}hne, Olaf}, title = {Grundlagenuntersuchungen zum Einfluss des Systemdrucks auf die Trocknung von Braunkohle in Wasserdampf}, publisher = {Cuvillier}, address = {G{\"o}ttingen}, isbn = {978-3-9540407-6-6}, pages = {XV, 141}, language = {de} } @misc{HorsfieldScheckWenderothKrautzetal., author = {Horsfield, Brian and Scheck-Wenderoth, Magdalena and Krautz, Hans Joachim and Mutti, Maria}, title = {Geoenergy: From visions to solutions}, doi = {10.1016/j.chemer.2010.06.002}, language = {en} } @inproceedings{HarmsKlattKrautz, author = {Harms, G. and Klatt, Matthias and Krautz, Hans Joachim}, title = {Hybrid Power Plant and Hydrogen Research Centre}, language = {de} } @inproceedings{GuerreroKlattKrautz, author = {Guerrero, Cinthya and Klatt, Matthias and Krautz, Hans Joachim}, title = {Energy transition in Germany: a case study on renewable energy integration and its impact in the operation and efficiency of coal-fired power plants}, series = {Southern African Energy Efficiency Convention (SAEEC 2017), 14th and 15th November 2017, Gauteng, S{\"u}dafrika}, booktitle = {Southern African Energy Efficiency Convention (SAEEC 2017), 14th and 15th November 2017, Gauteng, S{\"u}dafrika}, isbn = {978-0-6399125-0-9}, pages = {6}, language = {en} } @incollection{GriebeOwczarekThielenetal., author = {Griebe, Steffen and Owczarek, Christian and Thielen, W. and Paulick, G.}, title = {Verbrennung von Lausitzer Braunkohlen und Mischbrennstoffen in einer Zykloidfeuerung - Einsatzgebiet dezentraler W{\"a}rmemarkt}, language = {de} } @inproceedings{GriebeKrautzPaulick, author = {Griebe, Steffen and Krautz, Hans Joachim and Paulick, G.}, title = {M{\"o}glichkeiten der thermischen Verwertung von mechanisch entw{\"a}ssertem Kl{\"a}rschlamm und weiteren Reststoffen in einer mit Trockenbraunkohle betriebenen Zykloidfeuerung}, language = {de} } @inproceedings{GriebeKrautzMassow, author = {Griebe, Steffen and Krautz, Hans Joachim and Massow, R.}, title = {Druck-Zykloidfeuerung - ein Feuerungssystem f{\"u}r die thermische Umsetzung von Lausitzer Trockenbraunkohle}, abstract = {Vortrag anl{\"a}sslich des Zweiten Statusseminar "Druckflamm", Aachen}, language = {de} } @article{GriebeKrautzKirmse, author = {Griebe, Steffen and Krautz, Hans Joachim and Kirmse, Dietrich}, title = {Mitverbrennung von Biomassen in braunkohlegefeuerten Kraftwerken}, language = {de} } @inproceedings{GriebeKrautzAltmannetal., author = {Griebe, Steffen and Krautz, Hans Joachim and Altmann, H. and Kluger, F.}, title = {Erste Verbennungsuntersuchungen zum Oxyfuel-Prozess in einer 0,5 MWth-Tangentialfeuerung}, language = {de} } @inproceedings{GriebeKrautz, author = {Griebe, Steffen and Krautz, Hans Joachim}, title = {Development of a cycloid combustion system for lignite and co-combustion of sewages sludge and biomass with high efficiency and low emission}, language = {en} } @phdthesis{Griebe, author = {Griebe, Steffen}, title = {Modellierung der Verbrennung von Braunkohlen in einer Zykloidfeuerung unter Ber{\"u}cksichtigung der Schadstoffemissionen CO, NOx und SO2}, publisher = {Cuvillier-Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-86727-512-5}, language = {de} } @misc{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andr{\´e} and Tannert, Daniel and Krautz, Hans Joachim}, title = {Standortevaluierung und System-pfadanalyse im Forschungsprojekt WESpe - Wissenschaftliche Forschung zu Windwasserstoff-Energiespeichern}, series = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2016 ; energie-symposium, 23. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 3. - 5. November 2016}, volume = {2016}, journal = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2016 ; energie-symposium, 23. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 3. - 5. November 2016}, publisher = {Fachhochschule Stralsund}, address = {Stralsund}, isbn = {978-3-9817740-1-6}, pages = {143 -- 147}, language = {de} } @inproceedings{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andre and Tannert, Daniel and Krautz, Hans Joachim}, title = {Pressure and Temperature Influence on Alkine Electrolysis Performance}, series = {Proceedings of 5th European PEFC and H2 Forum, Luzern, Schweiz, June/July 2015}, booktitle = {Proceedings of 5th European PEFC and H2 Forum, Luzern, Schweiz, June/July 2015}, publisher = {European Fuel Cell Forum AG}, address = {Luzern-Adligenswil}, isbn = {978-3-905592-19-1}, language = {en} } @inproceedings{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andre and Tannert, Daniel and Krautz, Hans Joachim}, title = {Influence of variable operating parameters on the process of the advanced alkaline pressurised electrolysis}, series = {9th International Renewable Energy Storage Conference and Exhibition (IRES 2015), 09 - 11 March 2015, D{\"u}sseldorf, Germany}, booktitle = {9th International Renewable Energy Storage Conference and Exhibition (IRES 2015), 09 - 11 March 2015, D{\"u}sseldorf, Germany}, publisher = {EUROSOLAR [u.a.]}, address = {Bonn}, language = {en} } @inproceedings{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andre and Tannert, Daniel and Krautz, Hans Joachim}, title = {Druckelektrolyse zur Wasserstoffherstellung- eine Kurz{\"u}bersicht zu energetischen Vor- und Nachteilen}, series = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2015, 22. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 5. - 7. November 2015}, booktitle = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2015, 22. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 5. - 7. November 2015}, publisher = {Fachhochschule Stralsund}, address = {Stralsund}, isbn = {978-3-9817740-0-9}, pages = {30 -- 36}, language = {de} } @inproceedings{FischerTannertVoigtetal., author = {Fischer, Ulrich and Tannert, Daniel and Voigt, Andre and Ziems, Christian and Krautz, Hans Joachim and Barz, Mirko and Dinkler, Konstantin}, title = {Renewable Energy Storage by Hydrogen Production from Water Electrolysis}, series = {Technical and Economic Aspects of Renewable Energies - Know-How Transfer as Development Opportunity for Southern Europe}, booktitle = {Technical and Economic Aspects of Renewable Energies - Know-How Transfer as Development Opportunity for Southern Europe}, publisher = {Mensch und Buch}, address = {Berlin}, isbn = {978-3-86387-721-7}, pages = {118 -- 126}, language = {en} } @incollection{FischerRabannKrautz, author = {Fischer, Ulrich and Rabann, Bernd and Krautz, Hans Joachim}, title = {Wasserstoff - Elektrolyse}, series = {Erneuerbare Energien : VBI-Leitfaden}, booktitle = {Erneuerbare Energien : VBI-Leitfaden}, edition = {1. Auflage}, publisher = {Verband Beratender Ingenieure}, address = {Berlin}, pages = {85 -- 92}, language = {de} } @incollection{FischerKrautzWenskeetal., author = {Fischer, Ulrich and Krautz, Hans Joachim and Wenske, Michael and Tannert, Daniel and Kr{\"u}ger, Perco and Ziems, Christian and Stolten, Detlef and Emonts, Bernd}, title = {Hydrogen Hybrid Power Plant in Prenzlau, Brandenburg}, series = {Hydrogen Science and Engineering - Materials, Processes, Systems and Technology, Bd. 2}, booktitle = {Hydrogen Science and Engineering - Materials, Processes, Systems and Technology, Bd. 2}, publisher = {Wiley-VCH}, address = {Weinheim}, isbn = {978-3-5273323-8-0}, pages = {1033 -- 1052}, language = {en} } @inproceedings{FindeisenRombrechtKrautz, author = {Findeisen, Alexander and Rombrecht, Hans-Bernd and Krautz, Hans Joachim}, title = {Qualit{\"a}tsanforderungen an alternative Biomasse-Brennstoffe}, language = {de} } @inproceedings{FindeisenKrautzHaukeetal., author = {Findeisen, Alexander and Krautz, Hans Joachim and Hauke, Th. and Kranzmann, A.}, title = {Corrosion Processes and Carbonisation of Boiler Materials under Air and Oxyfuel Process Conditions}, language = {en} } @inproceedings{FindeisenKrautz, author = {Findeisen, Alexander and Krautz, Hans Joachim}, title = {Untersuchungen zum Korrosionsverhalten ausgew{\"a}hlter Werkstoffe bei verschiedenen Betriebsbedingungen}, language = {de} } @misc{FindeisenKlattKrautz, author = {Findeisen, Alexander and Klatt, Matthias and Krautz, Hans Joachim}, title = {Examination of the corrosion behaviour of selected power plant materials under various operating conditions}, doi = {http://dx.doi.org/10.1016/j.chemer.2010.05.006}, language = {en} } @inproceedings{FindeisenCorreadaSilvaKrautz, author = {Findeisen, Alexander and Correa da Silva, Rodrigo and Krautz, Hans Joachim}, title = {Konzeptionelle und verfahrenstechnische Umsetzung eines 400 kWth-Verbrennungsversuchsstandes - erste Erfahrungen aus der Inbetriebsetzung}, language = {de} } @inproceedings{FindeisenAbangKrautz, author = {Findeisen, Alexander and Abang, Roger Atini and Krautz, Hans Joachim}, title = {Corrosion Behaviour of Selected Power Plant Materials Under Oxyfuel Combustion Conditions}, language = {en} } @inproceedings{Findeisen, author = {Findeisen, Alexander}, title = {Analysis of corrosion behaviour of materials in oxyfuel fired power plants}, language = {en} } @misc{DanilaKunzRoentzsch, author = {Danila, Kevin and Kunz, Philip and R{\"o}ntzsch, Lars}, title = {Dynamic operation of low-temperature electrolyzer systems in modular large-scale chemical plants}, series = {Chemie - Ingenieur - Technik : CIT}, volume = {2025}, journal = {Chemie - Ingenieur - Technik : CIT}, publisher = {Wiley-VCH GmbH}, issn = {0009-286X}, doi = {10.1002/cite.202400140}, pages = {1 -- 11}, abstract = {As one of the main contributors to the greenhouse gas emissions worldwide, the reduction of emissions in chemical industry is indispensable. The production of hydrogen from renewable energy sources using water electrolysis can contribute to this goal. However, the dynamic character of renewable energy sources leads to major challenges regarding the dynamic operation of the production process. Here, a model of a modular low-temperature electrolyzer plant is presented. The effect of available time resolution of the source electricity as well as the impact of the integration time step is studied. With the presented model the positive effect of load-dependent operation of modular electrolyzer plants with fluctuating availability of source electricity on the total hydrogen output is demonstrated.}, language = {en} } @misc{DahashMieckOchsetal., author = {Dahash, Abdulrahman and Mieck, Sebastian and Ochs, Fabian and Krautz, Hans Joachim}, title = {A comparative study of two simulation tools for the technical feasibility in terms of modeling district heating systems: An optimization case study}, series = {Simulation Modelling Practice and Theory}, volume = {91}, journal = {Simulation Modelling Practice and Theory}, issn = {1569-190X}, doi = {10.1016/j.simpat.2018.11.008}, pages = {48 -- 68}, abstract = {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.}, language = {en} } @inproceedings{CorreadaSilvaMissagiaTappeetal., author = {Correa da Silva, Rodrigo and Missagia, Bruna and Tappe, Stephanie and Findeisen, Alexander and Krautz, Hans Joachim}, title = {Development of low CO2 technologies for oxyfuel combustion in power plants}, language = {en} } @inproceedings{CorreadaSilvaKrautz, author = {Correa da Silva, Rodrigo and Krautz, Hans Joachim}, title = {Theoretical analysis of heat transfer in a pulverized coal combustion chamber under O2/CO2 atmosphere}, language = {en} } @inproceedings{CorreadaSilvaKrautz, author = {Correa da Silva, Rodrigo and Krautz, Hans Joachim}, title = {Theoretical investigation of pulverized coal combustion in air and in O2/CO2 atmospheres}, language = {en} } @misc{CorreadaSilvaKangwanpongpanFindeisenetal., author = {Correa da Silva, Rodrigo and Kangwanpongpan, Tanin and Findeisen, Alexander and Krautz, Hans Joachim and Meyer, Marco and Roberg, Benedikt}, title = {Oxy-fuel Combustion Studies Applying a Novel Test Facility - First Numerical Results}, language = {en} } @inproceedings{CorreadaSilvaKangwanpongpanFindeisenetal., author = {Correa da Silva, Rodrigo and Kangwanpongpan, Tanin and Findeisen, Alexander and Krautz, Hans Joachim}, title = {Aspects of Numerical Simulation of Coal Combustion under Oxyfuel Atmospheres}, language = {de} } @inproceedings{CorreadaSilvaKangwanpongpanFindeisenetal., author = {Correa da Silva, Rodrigo and Kangwanpongpan, Tanin and Findeisen, Alexander and Krautz, Hans Joachim}, title = {Description of a 0.4 MWth laboratory facility for oxy-fuel combustion studies}, language = {en} } @inproceedings{ChalupnikKrautzWirtzetal., author = {Chalupnik, Rolf W. and Krautz, Hans Joachim and Wirtz, M. and Stuhlm{\"u}ller, F.}, title = {Applied Research for a New Generation of Lignite-Fired Combined Cycle Power Plant Using Circulating Pressurized Fluidized Bed Combustion}, language = {en} } @inproceedings{ChalupnikKrautzSchulzeetal., author = {Chalupnik, Rolf W. and Krautz, Hans Joachim and Schulze, H. and Stuhlm{\"u}ller, F. and Thielen, W.}, title = {Plant studies and experiments for a lignite-fired combined-cycle power plant using circulating pressurized fluidized bed combustion}, language = {en} } @phdthesis{Chalupnik, author = {Chalupnik, Rolf W.}, title = {Druckwirbelschichtkraftwerke : Kombikraftwerke mit Druckwirbelschichtfeuerung ; Entwicklung f{\"u}r Braunkohle unter besonderer Ber{\"u}cksichtigung des Emissionsverhaltens}, publisher = {Energiewirtschaft und Technik Verlagsges.}, address = {Essen}, isbn = {3-925349-31-6}, language = {de} } @inproceedings{CarotenutoCorreadaSilvaRechetal., author = {Carotenuto, A. S. and Correa da Silva, Rodrigo and Rech, R. and Marcilio, N. R. and Smith Schneider, Paulo and Krautz, Hans Joachim}, title = {Preliminary Investigation of the Global Kinetic Parameters of low-rank coals under oxy-fuel conditions}, language = {en} } @article{BaerMuellerRost, author = {B{\"a}r, F. and M{\"u}ller, S. and Rost, M.}, title = {Effiziente Braunkohleverstromung in einer Druckwirbelschichtfeuerung mit Teilvergasung}, language = {de} } @inproceedings{AsegehegnSchreiberKrautz, author = {Asegehegn, Teklay Weldeabzgi and Schreiber, Matthias and Krautz, Hans Joachim}, title = {Influence of Horizontal Tubes, Averaging Periods and Extraction Methods on the Hydrodynamics of Bubbling Gas-Solid Fluidized Beds}, language = {en} } @misc{AsegehegnSchreiberKrautz, author = {Asegehegn, Teklay Weldeabzgi and Schreiber, Matthias and Krautz, Hans Joachim}, title = {Numerical Study of Bubbling Gas-Solid Fluidized Beds Hydrodynamics: Influence of Immersed Horizontal Tubes and Data Analysis}, language = {en} } @misc{AsegehegnSchreiberKrautz, author = {Asegehegn, Teklay Weldeabzgi and Schreiber, Matthias and Krautz, Hans Joachim}, title = {Numerical simulation and experimental validation of bubble behavior in 2D gas-solid fluidized beds with immersed horizontal tubes}, doi = {http://dx.doi.org/10.1016/j.ces.2011.07.056}, language = {en} } @misc{AsegehegnSchreiberKrautz, author = {Asegehegn, Teklay Weldeabzgi and Schreiber, Matthias and Krautz, Hans Joachim}, title = {Investigation of bubble behavior in fluidized beds with and without immersed horizontal tubes using a digital image analysis technique}, doi = {http://dx.doi.org/10.1016/j.powtec.2011.03.025}, language = {en} } @misc{AsegehegnSchreiberKrautz, author = {Asegehegn, Teklay Weldeabzgi and Schreiber, Matthias and Krautz, Hans Joachim}, title = {Influence of two- and three-dimensional simulations on bubble behaviorin gas-solid fluidized beds with and without immersed horizontal tubes}, doi = {10.1016/j.powtec.2011.11.050}, language = {en} }