@inproceedings{RombrechtKrautz, author = {Rombrecht, Hans-Bernd and Krautz, Hans Joachim}, title = {Weiterentwicklung der ZDWSF-Versuchsanlage der BTU Cottbus}, language = {de} } @misc{TannertZiemsVoigtetal., author = {Tannert, Daniel and Ziems, Christian and Voigt, Andr{\´e} and Fischer, Ulrich and Krautz, Hans Joachim}, title = {Wasserstoff- und Elektrolyseforschung an der BTU Cottbus - Senftenberg}, series = {VGB PowerTech}, volume = {98}, journal = {VGB PowerTech}, number = {8}, issn = {1435-3199}, pages = {65 -- 69}, language = {de} } @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} } @misc{AhmelsVossGagoetal., author = {Ahmels, Peter and Voß, Ulrike and Gago, Aldo and Lettenmeier, Philipp and Voglst{\"a}tter, Christopher and Schmitz, Steffen and Kleinickel, Cindy and Barsch, Markus and Rockmann, Rico and Pumpa, Martin and Fischer, Ulrich and Voigt, Andr{\´e}}, title = {Wasserstoff zur Windenergiespeicherung - Ergebnisse des Projektes WESpe}, series = {HZwei: das Magazin f{\"u}r Wasserstoff und Brennstoffzellen}, volume = {18}, journal = {HZwei: das Magazin f{\"u}r Wasserstoff und Brennstoffzellen}, number = {2}, issn = {1862-393X}, pages = {28 -- 30}, language = {de} } @inproceedings{ZiemsKrautz, author = {Ziems, Christian and Krautz, Hans Joachim}, title = {Wasserelektrolyse - Praxiserfahrungen im Modellprojekt}, series = {Dena Konferenz "Power to Gas - innovative Systeml{\"o}sungen f{\"u}r ein zukunftsf{\"a}higes Energiesystem entwickeln", Berlin, 2012}, booktitle = {Dena Konferenz "Power to Gas - innovative Systeml{\"o}sungen f{\"u}r ein zukunftsf{\"a}higes Energiesystem entwickeln", Berlin, 2012}, language = {de} } @techreport{KrautzMoehlenkampSakkasetal., author = {Krautz, Hans Joachim and M{\"o}hlenkamp, Georg and Sakkas, Nikolaos Panagiotis and Gillung, Frank and Lenivova, Veronika}, title = {Verbundvorhaben AEL3D - Neuartige por{\"o}se 3D-Elektrodenmaterialen zur effizienteren alkalischen Wasserelektrolyse; Teilprojekt: Zellbau und Systemtests : fachlicher Abschlussbericht : Projektlaufzeit: 01.09.2016-31.12.2021}, publisher = {KWT Lehrstuhl Kraftwerkstechnik, BTU Brandenburgische Technische Universit{\"a}t Cottbus-Senftenberg}, address = {Cottbus}, doi = {10.2314/KXP:1859085385}, pages = {147}, language = {de} } @misc{KatzerKrautz, author = {Katzer, Christian and Krautz, Hans Joachim}, title = {Untersuchungen zur messtechnischen Erfassung von instation{\"a}ren Effekten eines Gas-/Kohle-Kombibrenners}, series = {29. Deutscher Flammentag : 17. - 18. September 2019 Ruhr-Universit{\"a}t Bochum}, journal = {29. Deutscher Flammentag : 17. - 18. September 2019 Ruhr-Universit{\"a}t Bochum}, abstract = {In diesem Beitrag wird ein Flammenbewertungsverfahren auf Basis eines Flammenw{\"a}chtersignals vorgestellt. Mit zunehmender Flexibilisierung der Verbrennungsanlagen und der Absenkung von Emissionsgrenzwerten wird eine unmittelbare Flammenanalyse f{\"u}r die Regelung der Brennersysteme zunehmend erforderlich. Auf Basis eines Flammenw{\"a}chtersignals wird mittels Frequenzanalyse ein erg{\"a}nzendes Auswertungsverfahren dargestellt. Anhand der vorgestellten Untersuchungen an einem Erdgas-/Kohle-Kombibrenner wird die Qualifizierung der Prozessmesstechnik f{\"u}r die Flammenbewertung und Brennersteuerung {\"u}berpr{\"u}ft. Die Ergebnisse im Erdgas- und Kohlebetrieb belegen, dass mit der erweiterten Signalanalyse eine Ver{\"a}nderung des Flammenverhaltens mit dem Flammenw{\"a}chtersignal in Zusammenhang gebracht werden kann. Dabei konnte einmal das Emissionsverhalten bei verschiedenen Brennereinstellungen beurteilt werden und andererseits ein Zugriff auf das Stabilit{\"a}tsverhalten der Kohleflamme erm{\"o}glicht werden. Durch die Analyse des Strahlungssignals der Chemilumineszenz des OH* bzw. CH*-Radikals ist ein Bezug zur Ver{\"a}nderung in der Reaktionszone hergestellt. Die entwickelte Bewertungsmethodik kann f{\"u}r die Entwicklung und Etablierung von Beobachter- und Regelmodellen von Brennersystemen genutzt werden.}, language = {de} } @phdthesis{Lechner, author = {Lechner, Stefan}, title = {Untersuchungen zur Berechnung und Optimierung des W{\"a}rme{\"u}bergangs bei der Dampfwirbelschicht-Trocknung am Beispiel von Lausitzer Braunkohlen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-27120}, language = {de} } @inproceedings{PosseltKrautz, author = {Posselt, Joachim and Krautz, Hans Joachim}, title = {Untersuchung des Einflusses der Korngr{\"o}ße auf die Trocknungskinetik von Braunkohle}, series = {45. Kraftwerkstechnisches Kolloquium, Dresden, Oktober 2013}, booktitle = {45. Kraftwerkstechnisches Kolloquium, Dresden, Oktober 2013}, publisher = {TK-Verlag}, address = {Neuruppin}, isbn = {978-3-944310-04-6}, language = {de} } @inproceedings{TannertKruegerKrautz, author = {Tannert, Daniel and Kr{\"u}ger, Perco and Krautz, Hans Joachim}, title = {Untersuchung der alkalischen Druckelektrolysetechnologie am Wasserstoff-Forschungszentrum der BTU Cottbus-Senftenberg}, series = {45. Kraftwerkstechnisches Kolloquium, Dresden, Oktober 2013}, booktitle = {45. Kraftwerkstechnisches Kolloquium, Dresden, Oktober 2013}, isbn = {978-3-944310-04-6}, 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} } @phdthesis{Abang, author = {Abang, Roger Atini}, title = {Thermodynamic modeling and experimental investigations of high temperature corrosion and oxidation due to increased power plant cycling}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-40032}, pages = {201}, language = {en} } @misc{SakkasAbang, author = {Sakkas, Nikolaos Panagiotis and Abang, Roger Atini}, title = {Thermal load prediction of communal district heating systems by applying data-driven machine learning methods}, series = {Energy Reports}, volume = {8}, journal = {Energy Reports}, issn = {2352-4847}, doi = {10.1016/j.egyr.2021.12.082}, pages = {1883 -- 1895}, abstract = {Load forecasting is an essential part of the operational management of combined heat and electrical power units, since a reliable hour- and day-ahead estimation of their thermal and electrical load can significantly improve their technical and economic performance, as well as their reliability. Among different types of prediction techniques, data-driven machine learning methods appear to be more suitable for load estimation in operational systems, compared to the classical forward approach. Research so far has been concentrated mainly on the magnitude of buildings with single load types. It has only been extended to a limited degree on the level of a district heating network where several end users with different characteristics merge into one bigger scale heat consumer (city or group of communities). In this study, artificial neural networks are utilized, to develop a load prediction model for district heating networks. A segmented analytical multi-phase approach is employed, to gradually optimize the predictor by varying the characteristics of the input variables and the structure of the neural network. The comparison against the load prediction time series generated by a local communal energy supplier using a commercial software reveals that, although the latter is enhanced by manual human corrections, the optimized fully automatic predictors developed in the present study generate a more reliable load forecast.}, language = {en} } @inproceedings{SchierackPriesmeierKrautzetal., author = {Schierack, Frank and Priesmeier, U. and Krautz, Hans Joachim and Thielen, W.}, title = {Theoretische Voruntersuchungen zum Versuchsbetrieb an der Technikumsanlage mit zirkulierender Druckwirbelschichtfeuerung (ZDWSF 2.Generation) der BTU Cottbus}, isbn = {3-18-091535-9}, language = {de} } @inproceedings{RombrechtKrautz, author = {Rombrecht, Hans-Bernd and Krautz, Hans Joachim}, title = {The BTU Cottbus PFCBC, 2nd Generation Lab-scale-Plant Experiences and Results}, language = {de} } @misc{MieckKrautz, author = {Mieck, Sebastian and Krautz, Hans Joachim}, title = {Systematic analysis and preparation of high resolution in-situ measurements for the estimation of PV module parameters}, series = {VGB PowerTech}, volume = {98}, journal = {VGB PowerTech}, number = {8}, issn = {1435-3199}, pages = {75 -- 81}, abstract = {In the last two decades, a rapid expansion of photovoltaic (PV) power plants of different sizes has taken place. Along with this, the interest from science and industry is growing, exploring the strengths and weaknesses of this technology as well as further developing the efficiency in its production and operation. For planning and operating of PV power plants, valid energy yield forecasts are desirable. These forecasts are also important to draw conclusions for the monitoring of future PV technologies. The analysis, evaluation and processing of meteorological and technical measurement datasets play an essential role. In this article, high-resolution measurement data sets of a mobile, autarkic test system are analyzed firstly. The measured data are checked for plausibility and validity with the corresponding methods. After this observations and phenomena with meteorological cause are described. In a second step, a practicable procedure for the preparation of the measurement data is presented, in order to make it suitable for further calculations, e.g. identification of photovoltaic module parameters for energy yield calculations. The focus is particularly on the flexibility, adaptability and code performance of the processing procedure. Results, evaluations and outlooks on the methods used, measurement data and selected software packages are made.}, language = {en} } @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{RombrechtKrautz, author = {Rombrecht, Hans-Bernd and Krautz, Hans Joachim}, title = {Stand der Untersuchungen an der Versuchsanlage mit zirkulierender Druckwirbelschichtfeuerung der 2. Generation der BTU Cottbus}, language = {de} } @inproceedings{KruegerNimtzFischeretal., author = {Kr{\"u}ger, Perco and Nimtz, Michael and Fischer, Ulrich and Krautz, Hans Joachim}, title = {Simulation des Einsatzes von kapazitiv begrenzten Anlagen in der Prim{\"a}rregelleistung}, series = {Kraftwerkstechnik 2015, Strategien, Anlagentechnik und Betrieb,Beitr{\"a}ge des 47. Kraftwerkstechnischen Kolloquiums vom 13. und 14. Oktober 2015 in Dresden}, booktitle = {Kraftwerkstechnik 2015, Strategien, Anlagentechnik und Betrieb,Beitr{\"a}ge des 47. Kraftwerkstechnischen Kolloquiums vom 13. und 14. Oktober 2015 in Dresden}, publisher = {SAXONIA}, address = {Freiberg}, isbn = {978-3-934409-70-5}, pages = {667 -- 682}, 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} }