TY - RPRT A1 - Ahlinder, Stefan A1 - Berg, Heinz Peter A1 - Biesold, Volker T1 - EU Growth Project GRD1-1999-10602 "AEROHEX", Deliverable 17a : Report on the hot side flow investigation on the exhaust case of a recuperated industrial gas turbine N2 - Bericht zu den Untersuchungen der Heissgas-Strömung um den Abgaswärmetauscher einer typischen kompakten Indusriegasturbine KW - CFD analyses KW - CLEAN demonstrator KW - porosity model code KW - heat exchanger KW - hot side gas flow KW - hot side flow KW - exhaust case KW - recuperated industrial gas turbine Y1 - 2004 ER - TY - CHAP A1 - Rabe, Guido A1 - Berg, Heinz Peter A1 - Benton, R. T1 - Plattformkühlung mit Anwendung der "ballistischen Kühlung" in unterschiedlichen Ausblasekonfigurationen N2 - experimentelle und numerische Untersuchung eins neuartigen Filmkühldesigns zur Kühlung der Plattform eines Hochdruckturbinenstators - die ballistische Plattform-Filmkühlung KW - Filmkühlung KW - Turbinen-Plattform KW - Plattform-Filmkühlung KW - ballistische Plattform-Filmkühlung KW - Ausblasewinkel KW - Sekundärströmung KW - Leitradgitter Y1 - 2004 ER - TY - CHAP A1 - Rabe, Guido T1 - Wechselwirkung von Plattformkühlung und Sekundärströmung, Filmkühleffektivität und Strömung der "ballistisch-gekühlten" Turbinenschaufel N2 - experimentelle und numerische Untersuchung eins neuartigen Filmkühldesigns zur Kühlung der Plattform eines Hochdruckturbinenstators - die ballistische Plattform-Filmkühlung KW - Filmkühlung KW - Turbinen-Plattform KW - Plattform-Filmkühlung KW - ballistische Plattform-Filmkühlung KW - Ausblasewinkel KW - Sekundärströmung KW - Leitradgitter Y1 - 2004 ER - TY - RPRT A1 - Ahlinder, Stefan A1 - Berg, Heinz Peter T1 - EU Growth Project GRD1-1999-10602 "CLEAN", Deliverable 20 : report on matrix orientation in the EEFAE-LSIP (CLEAN) N2 - zweiter Teil des Reports 20, Darstellung der matrix-Ausrichtung im EEFAE-LSIP (CLEAN) Demonstator, Darstellen der CFD Untersuchungen zum Gas-Strom auf der heissen Seite im CLEAN Demonstrator. Der Wärmetauscher ist als Porösitätsmodell dargestellt. KW - CFD analyses KW - Clean demonstrator KW - porosity model code KW - heat exchanger KW - hot side gas flow Y1 - 2004 ER - TY - THES A1 - Liu, Fushui T1 - CFD - study on hydrogen engine mixture formation and combustion N2 - Darstellung der Simulation der Wasserstoffeinspritzung und Gemischbildung anhand geeigneter Modele KW - micture formation KW - combustion KW - hydrogen engine KW - CFD KW - FIRE Y1 - 2004 SN - 3-86537-167-1 PB - Cuvillier CY - Göttingen ER - TY - CHAP A1 - Feiler, Christoph A1 - Berg, Heinz Peter A1 - Haselbach, F. T1 - Some aspects of flow and heat transfer measurements of a non-axisymmetrically countoured turbine endwall KW - non-axialsymmetrically countoured turbine endwall KW - countoured endwall KW - turbine endwall KW - flow KW - heat transfer KW - Strömung KW - Wärmeübertragung KW - Turbinenschaufel KW - konturierte Endwand KW - nicht axialsymmetrisch konturierte Endwand KW - Turbinenendwand Y1 - 2005 ER - TY - THES A1 - Dückershoff, Roland T1 - Filmkühlung in Gebieten mit verzögerter Hauptströmung und in Bereichen lokaler Strömungsablösung KW - Luft- und Raumfahrttechnik KW - Verkehrstechnik KW - Filmkühlung KW - Gasturbine KW - Turbinenschaufel KW - Strömungsablösung KW - verzögerte Strömung Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-633 PB - Brandenburgische Techn. Univ. CY - Cottbus ER - TY - THES A1 - Ahlinder, Stefan T1 - On modelling of compact tube bundle heat exchangers as porous media for recuperated gas turbine engine applications KW - Fluggasturbine KW - Wärmeaustauscher KW - Simulation KW - Wärmetauscher KW - CFD KW - Poröses Medium KW - Rohrbündel Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-151 ER - TY - CHAP A1 - Wojczik, A. A1 - Prinzler, Michael A1 - Berg, Heinz Peter T1 - Laseroptische Vermessung (PIV) verzögerter & aktiv beschleunigter Grenzschichten einer ebenen Turbinenlaufschaufelumströmung KW - Grenzschichtströmung KW - Turbinenschaufel KW - Gasturbine KW - Messtechnik KW - PIV Y1 - 2007 ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Berg, Heinz Peter A1 - Himmelberg, Axel T1 - Optimierung der Zündkerzenposition in einem Wankelmotor, Motorische Verbrennung KW - Wankelmotor KW - Zündung KW - Optimierung Spray KW - Gemischbildung Y1 - 2007 ER - TY - JOUR A1 - Antoshkiv, Oleksiy A1 - Berg, Heinz Peter A1 - Wagner, R. T1 - Untersuchungen des ottomotorischen Betriebs mit verschiedenen Kraftstoffmischungen KW - Motor KW - Verbrennung KW - Kraftstoffmischungen KW - Alternative Kraftstoffe KW - Gemischbildung Y1 - 2007 ER - TY - CHAP A1 - Poojitganont, Thanapol A1 - Berg, Heinz Peter A1 - Izweik, Husni Taher A1 - Himmelberg, Axel T1 - Wankel Rotary Engine for Small Aircrafts and UAVs Applications: The Simulation for Chamber Design Development KW - Wankelmotor KW - Flugantribe KW - Simulation KW - Verbrennung Y1 - 2007 ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Izweik, Husni Taher A1 - Poojitganont, Thanapol A1 - Antoshkiv, Oleksiy T1 - Anwendung fortschrittlicher Simulationswerkzeuge in der Wankelmotorenentwicklung KW - Wankelmotor KW - Simulation KW - Gemischbildung KW - Verbrennung Y1 - 2006 ER - TY - CHAP A1 - Schumeyko, Y. A1 - Antoshkiv, Oleksiy A1 - Puillandre, Y. A1 - Berg, Heinz Peter ED - Steinberg, Peter T1 - Simulation eines Motorwarmlaufs im neuen europäischen Fahrzyklus (NEFZ) T2 - Wärmemanagement des Kraftfahrzeugs V KW - Energiemanagement KW - Fahrzeug KW - Simulation Y1 - 2006 SN - 978-3-8169-2651-1 SN - 3-8169-2651-7 SP - 28 EP - 37 PB - Expert-Verlag CY - Renningen ER - TY - JOUR A1 - Ploesser, Joerg A1 - Antoshkiv, Oleksiy A1 - Berg, Heinz Peter A1 - Schluchter, Wolfgang T1 - Optimierung des En-O-Trak-Systems KW - BHKW KW - Motor KW - Kraft-Wärme-Kopplung KW - Motorwarmlauf Y1 - 2006 ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Mykhalyuk, Maryan A1 - Berg, Heinz Peter T1 - Development of turbocharger system for wankel engine working on diesel cycle KW - Turbolader KW - Wankelmotor KW - Flugmotor KW - Modelliering KW - Simulation Y1 - 2010 ER - TY - CHAP A1 - Berg, Heinz Peter T1 - Entwicklung eines neuartigen, vielstofffähigen Range-Extenders für zukünftige Elektrofahrzeuge KW - Rangeextender KW - Vielstofffähigkeit KW - Elektroauto KW - Multifuel Y1 - 2009 ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Berg, Heinz Peter T1 - Modern aero-engine combustor flame stabilization using cone bodies T2 - New beginnings, CEAS 2009 European Air and Space Conference, 26 - 29 October 2009, Manchester, UK, post-conference DVD KW - Gasturbine KW - Brennkammer KW - Flammenstabilisierung KW - Flammen KW - Vebrennung Y1 - 2009 SN - 1-85768-213-0 PB - Royal Aeronautical Society CY - London ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Mykhalyuk, Maryan A1 - Berg, Heinz Peter T1 - BOOST-Modeling of Turbo-Charging in the Wankel Engine working on Diesel Cycle KW - Wankelmotor KW - Turboaufladung KW - Imulation Y1 - 2009 ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Antoshkiv, Oleksiy A1 - Steinberg, Peter A1 - Sigmund, Ernst T1 - Entwicklung von "Multifuel Power Unit (MFPU)" - Familien für die Anwendung in zukünftigen hybriden Gasfahrzeugen" KW - Range Extender KW - Multifuel KW - Wankelmotor KW - Hybridauto Y1 - 2008 ER - TY - CHAP A1 - Antoshkiv, Oleksiy T1 - Co-generator based on a multi-fuel rotary engine. Probleme der Energieeinsparung KW - co-Generator KW - BHKW KW - Wankelmotor KW - Multifuel KW - Kraft-Wärme-Kopplung Y1 - 2008 ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Bake, S. A1 - Berg, Heinz Peter T1 - Spray-Airflow Interaction in a Modern Gas Turbine Combustion Chamber KW - Gasturbine KW - Brennkammer KW - Kraftstoffzerstäubung KW - Spray Y1 - 2008 ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Bake, S. A1 - Berg, Heinz Peter T1 - Spray Phenomena and their Influence on the Ignition Performance of a Modern Aeroengine Combustor KW - Gasturbine KW - Brennkammer KW - Kraftstoffzerstäubung KW - Spray Y1 - 2008 ER - TY - CHAP A1 - Rabe, Guido A1 - Berg, Heinz Peter A1 - Schiffer, Heinz Peter A1 - Benton, R. T1 - Wechselwirkung zwischen Sekundärströmung und "ballistischen" Plattformfilmkühlung KW - Gasturbine KW - Kühlung KW - Balistische Kühlung Y1 - 2004 ER - TY - RPRT A1 - Ahlinder, Stefan A1 - Berg, Heinz Peter T1 - EU Growth Project GRD1-1999-10602 "AEROHEX" N2 - Deliverable 20b, Report on the matrix orientation in the EEFAE-LSIP (CLEAN) demonstrator, CFD analysis KW - Aerohex CFD Y1 - 2003 ER - TY - CHAP A1 - Feiler, Christoph A1 - Berg, Heinz Peter T1 - Aerothermale Auslegungsvalidierung von Plattformkonfigurationen mittels Experiment und numerischer Verfahren T2 - Motto: 100 Jahre Motorflug - 112 Jahre Menschenflug: Visionen gestalten Zukunft, Deutscher Luft- und Raumfahrtkongress 2003, München, 17. bis 20. November 2003, Bd. 3 Y1 - 2003 SP - 1933 EP - 1950 PB - DGLR CY - Bonn ER - TY - JOUR A1 - Chen, X. A1 - Keil, M. A1 - Berg, Heinz Peter T1 - Flexible dynamische Messdatenerfassung in der Verbrennungs-motoren- und Kleingasturbinenerprobung Y1 - 2002 ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Reichel, Yves A1 - Neumann, Martin A1 - Antoshkiv, Oleksiy T1 - Turbo Range Extenders - Recuperative Micro Gas Turbines as an Alternativ Concept of Energy Conversion in Plug-In Hybrid Vehicles T2 - Automotive and engine technology, 11th Stuttgart International Symposium, 22 and 23 February 2011, Stuttgart, Germany, Vol. 1 Y1 - 2011 SN - 978-3-8348-1561-3 SP - 95 EP - 110 PB - ATZlive CY - Wiesbaden ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Bake, Sebastian A1 - Bagchi, Imon A1 - Berg, Heinz Peter T1 - Ignition Performance Improvement in a Modern Gas Turbine Combustor T2 - XX. International Symposium on Air Breathing Engines 2011, ISABE 2011 Y1 - 2011 SN - 978-1-61839-180-3 SP - 217 EP - 225 PB - American Institute of Aeronautics and Astronautics CY - Reston, VA ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Krienke, Christian T1 - Mikrogasturbinen-SOFC-Prozesse mit hohem Wirkungsgradpotential T2 - 12. Magdeburger Maschinenbautage, 30. September und 1. Oktober 2015 N2 - Schwerpunkt des Beitrages ist die Entwicklung und Applikation eines alternativen Energieumwandlungskonzeptes. Dieses basiert auf einer kompakten vielstofffähigen Mikrogasturbinen (MGT)- Technologie, welche über einen internen Wärmetausch einen hohen Wirkungsgrad ermöglicht und durch eine weitere Prozesshybridisierung (durch eine eingebettete SOFC) den „Energiewandler der Zukunft“ darstellt. Es wird die luftgelagerte MGT-Generator-Basistechnologie beschrieben, der darauf aufgebaute MGT-SOFCHybrid-Prozess simuliert, eine kompakte Abwandlung mit integriertem Generator dargestellt und der Familiengedanke aufgegriffen. Die Konzepte basieren auf einer Luftlagertechnologie in Verbindung mit einem direkt von der Turbomaschine angetriebenen Generator und einem Rekuperator, welcher die Abgaswärme wieder in den Prozess zurückführt. Sie liefern die notwendige Grundlage für einen hoch effektiven, reinen Mikrogasturbinenprozess (MGT-Prozess) und den „MGT-SOFC-Hochwirkungsgrad-Prozess“. Neben der luftgelagerten Mikrogasturbinen-Generatorbauart, stellt insbesondere die SOFC eine wichtige Schlüsseltechnologie dar. Der Begriff SOFC steht für „Solid Oxide Fuel Cell“ (Festoxid-Brennstoffzelle). Dieser Brennstoffzellentyp arbeitet bei einer sehr hohen Temperatur (700 °C bis 1000 °C) und erlangt einen sehr hohen Wirkungsgrad, wenn man die Verlustwärme und den nicht konvertierten Brennstoff durch eine geschickte Integration mit dem MGT-Prozess weiter verwertet. Um den maximal möglichen Wirkungsgrad der hybriden Bauweise aufzuzeigen, wird zunächst der idealisierte Wärmekraftmaschinen-Brennstoffzellen-Prozess dargestellt. Danach wird die zum gegenwärtigen Zeitpunkt vorhandene Basistechnologie beschrieben und verschiedene, darauf beruhende reale Prozesse für die Verstromung von Methan (Erdgas) simuliert. Hierbei werden die hohen Wirkungsgradpotentiale (elektrisch) dieser realen Prozesse (bis ca. 80 %) aufgezeigt. Der Beitrag endet mit der kurzen Darstellung einer Energiewandlerfamilie im Bereich 20 KW bis 0,8 MW (zukünftig bis 2,3 MW) und einem Ausblick auf den neuen Markt der Zukunft, sowie mit einer Empfehlung zum Aufbau eines interdisziplinären Forschungsnetzwerkes. KW - Mikrogasturbinen-SOFC-Prozess; MGT; SOFC Y1 - 2015 PB - Otto-von-Guericke Universität Magdeburg CY - Magdeburg ER - TY - CHAP A1 - Poojitganont, Thanapol A1 - Berg, Heinz Peter A1 - Kingko, Chirdchai A1 - Bun-Athuek, Natthaphon A1 - Watjatrakul, Boonchai T1 - One-Dimensional Thermodynamic Cycle Analysis of Micro Gas Turbine (MGT) for Small Power Plant T2 - The International Conference on Science and Technology, 2015 N2 - The energy demands worldwide and especially in developing countries are significantly increased, whereas the numbers of electricity supply are not enlarged at Together with the decentralized ideal of the forthcoming power plants, the 100kW micro gas turbine (MGT) could be one of the solutions for the future. Based on the multi development project for small power plants, the 1D simulation of the overall system with MATLAB has been performed to utilize as an analysis tool for optimizing the thermodynamic cycle of the system. At the beginning the code has been validated with the commercial program for power plant simulation, called EBSILON Professional. The result shows that they are compatible in the same direction. The next part illustrates the comparing result of the efficiency on the whole system, when turbine inlet temperature has changed. The results show that higher turbine inlet temperature provides also higher global efficiency. However, the minimum efficiencies, which are obtained on each specific turbine inlet temperature, are not corresponded at the same pressure ratio. In the latter section, the effect of fuel types is also considered on the output efficiency. The results show that to maintain the output efficiency on each fixed turbine inlet temperature the fuel mass flow rate has to be increased in reciprocal to their lower heating values. However, in the lower range of their mass flow rate the increment of efficiency is not proportional to the addition of fuel. KW - Micro gas turbine, MATLAB, One-dimensionalThermodynamics simulation, decentralized power plant Y1 - 2015 U6 - https://doi.org/10.1109/TICST.2015.7369342 SP - 64 EP - 69 PB - IEEE CY - New York ER - TY - GEN A1 - Berg, Heinz Peter A1 - Himmelberg, Axel A1 - Lehmann, Mario A1 - Dückershoff, Roland A1 - Neumann, Mathias T1 - The Turbo-Fuel-Cell 1.0 – family concept - Compact Micro Gas Turbine (MGT) – Solid Oxide Fuel Cell (SOFC) energy converters in the 100 - 500 kW electrical power range for the future T2 - IOP conference series : Materials Science and Engineering N2 - The “Turbo-Fuel-Cell-Technology” has been described as a MGT-SOFC hybrid system consisting of a recuperated micro gas turbine (MGT) process with an embedded solid oxide fuel cell (SOFC) subsystem. SOFC stacks are connected to “SOFC stack grapes” and are equipped with the so called HEXAR-Module. This module is composed of a high-temperature heat exchanger (HEX), an afterburner (A) and a steam reformer (R). The MGT-concept is based on a generator driven directly by the turbomachine and a recuperator, which returns the exhaust heat to the pressurized compressor outlet air. This provides the necessary base for a highly effective, pure MGT process and the “MGT-SOFC-high-efficiency process”. This paper describes the concept and the thermodynamic background of a highly effective and compact design of the “Turbo-Fuel-Cell 1.0-Family” in the electrical performance class from 100 to 500kW. The technological state of the system is shown and a rating of the system with comparative parameters is discussed. It becomes visible that all necessary basic technologies should be available and that the technology (for stationary applications) can have the “entry into services (E.I.S.)” in the next 10 years. The MGT-SOFC performance map under different operation conditions is discussed. This article also provides an overview of the research on MGT-SOFC-Systems and the scenario of an energy supply network and a mobile energy conversion of the future introduction. KW - MGT-SOFC KW - Brennstoffzellen KW - Mikrogasturbinen KW - Hybrid Y1 - 2018 UR - http://iopscience.iop.org/article/10.1088/1757-899X/297/1/012004 U6 - https://doi.org/doi:10.1088/1757-899X/297/1/012004 SN - 1757-899X VL - 297 ER - TY - GEN A1 - Antoshkiv, Oleksiy A1 - Poojitganont, Thanapol A1 - Jeansirisomboon, Settapak A1 - Berg, Heinz Peter T1 - Ignition improvement by injector arrangement in a multi-fuel combustor for micro gas turbine T2 - IOP conference series : Materials Science and Engineering N2 - The novel combustor design also has an impact on the ignitor arrangement. The conventional ignitor system cannot guarantee optimal ignition performance in the usual radial position. The difficult ignitability of gaseous fuels was the main challenge for the ignitor system improvement. One way to improve the ignition performance significantly is a torch ignitor system in which the gaseous fuel is directly mixed with a large amount of the combustor air. To reach this goal, the ignition process was investigated in detail. The micro gas turbine (MGT) ignition was optimised considering three main procedures: torch ignitor operation, burner ignition and flame propagation between the neighbour injectors. A successful final result of the chain of ignition procedures depends on multiple aspects of the combustor design. Performed development work shows an important step towards designing modern high-efficiency lowemission combustors. KW - Ignition KW - Injector arrangement KW - Multi-fuel KW - Combustor KW - Micro gas turbine Y1 - 2018 UR - http://iopscience.iop.org/article/10.1088/1757-899X/297/1/012006 U6 - https://doi.org/10.1088/1757-899X/297/1/012006 SN - 1757-899X VL - 297 ER - TY - GEN A1 - Berg, Heinz Peter A1 - Kleissl, Marko A1 - Himmelberg, Axel A1 - Lehmann, Mario A1 - Prechavut, Nontavut A1 - Vorpahl, Michael ED - Prukvilailert, Monchai T1 - Heat balancing of direct reforming fuel cells in MGT-SOFC hybrid systems T2 - 9th Thai Society of Mechanical Engineers, International Conference on Mechanical Engineering (TSME-ICoME 2018) 11–14 December 2018, Phuket, Thailand N2 - Solid oxide fuel cells convert chemical energy in electrical energy and are highly suitable for the conversion of hydrocarbon based fuels and products from PowerToGas conversions. Embedded in a micro gas turbine-cycle instead of the combustion chamber the heat energy of the injected fuel, released in the SOFC-Stack, can additionally converted into work and by a turbine-generator into electricity. In a compact system, SOFC stacks are designed to realize a direct steam-reforming process inside. In such direct-reforming fuel cell systems the SOFC operating temperature due to the heat demand for reforming, can be reduced to a value in the range of the outlet temperature of the downstream flow (650°C). If the cycle uses a recuperating system, the operating conditions of the SOFC can be realized without additional high-temperature heat exchanger systems. The system with an uncooled turbine, described in [1], just can reach the operating temperature with an additional high-temperature heat exchange. The system described in this publication does not require an additional high-temperature heat exchanger, because the X-value, as the ratio between the exchanged heat quantity and the required amount of heat to complete the MGT-cycle [2] due to the referring process, is nearly zero and can be realized via the inner container wall (of the MLC). The cycle is completed (between the SOFC and the turbine entry) by the heat input of an afterburner. Here the unreacted fuel of the SOFC fuel-stream is used to provide the necessary heat energy for the downstream turbo-generator-system. KW - MGT-SOFC KW - Heat balancing KW - simulation KW - thermodynamic cycle KW - effectivity Y1 - 2018 UR - https://iopscience.iop.org/article/10.1088/1757-899X/501/1/012007/meta U6 - https://doi.org/10.1088/1757-899X/501/1/012007 SN - 1757-899X SP - 50 EP - 60 PB - IOP Publishing/IOP Science CY - Bristol ET - 1. Auflage ER - TY - GEN A1 - Poojitganont, Thanapol A1 - Sinchai, J. A1 - Watjatrakul, Boonchai A1 - Berg, Heinz Peter ED - Prukvilailert, Monchai T1 - Numerical Investigation of In-chamber Flow inside a Wankel Rotary Engine T2 - 9th Thai Society of Mechanical Engineers, International Conference on Mechanical Engineering (TSME-ICoME 2018) 11–14 December 2018, Phuket, Thailand N2 - In this paper the in-house technique mesh moving function based on AVL-FIRE has been developed as a simulation tool to investigate the in-chamber flow phenomena of the Wankel rotary engine. The meshes from the starting rotor position at 165° BTDC until the ending rotor position at top dead center (TDC) have been created and connected together. The numerical simulations between an intake stroke and the end of a compression stroke have been successively performed. The results are validated with the selected publication on various engine speeds, at 675 rpm and 1170 rpm. In parallel three refinements of meshes have been carried out, in order to optimize the suitable meshes' elements for the calculation of this engine type. In addition, the turbulence models, which are standard k-ε and Large Eddy Simulations (LES), have been varied for detailed investigation of their predictive capabilities. The simulation results show that the flow phenomena are well corresponding to the experimental data in both engine speeds, especially with the LES. It could be also identified that the LES model performs better on predicting the flow field both in directions and characteristics. Moreover, there is no evidently difference on the results between the medium (c.a. 100,000 elements) and fine (c.a. 1,000,000 elements) meshes comparing to the experimental results. KW - Wankel rotary engine KW - In-chamber Flow KW - Numerical Investigation KW - flow phenomena KW - combustion Y1 - 2019 UR - https://iopscience.iop.org/article/10.1088/1757-899X/501/1/012043 U6 - https://doi.org/10.1088/1757-899X/501/1/012043 SN - 1757-899X SP - 326 EP - 333 PB - IOP Publishing/IOP Science CY - Bristol ET - 1. Auflage ER - TY - GEN A1 - Dückershoff, Roland A1 - Berg, Heinz Peter A1 - Himmelberg, Axel A1 - Lehmann, Mario A1 - Kleissl, Marko ED - Ashton, Anete T1 - Influence on the Electrical Efficiency of a Hybrid MGT-SOFC-System by μ-fogging in a-Two-Staged Compressor System T2 - IOP Conference Series: Materials Science and Engineering N2 - Hybrid combinations of solid oxide fuel cell and recuperated micro gas turbines can convert the chemical energy of hydrocarbon-based fuels in electrical energy with high electrical efficiency. With an integrated and improved cycle management, more than 70% of the energy content of the fuel could be converted. Therefore, the systems are highly suitable for the Power-To-Gas conversion. In particular, a pressure charging of the SOFC fuel cell leads to an increase in stack performance. By a downstream turbo set, after residual fuels are intentionally oxidized with an afterburner, additional electrical energy can be gained from the expansion of the hot exhaust gas stream and the overall efficiency can be increased. In order to increase the electrical efficiency of the system, it is proposed, to ensure the required compression of the process air in particular by a-two-staged turbo compressor with an intermediate cooling system. By thus achievable reduction of the dissipation of the compressor and by targeted condensation of finest drops in front of the second compressor stage affected by intermediate cooling, an increase in efficiency of the system is possible. This is achieved by targeted cooling of the process air behind a low pressure compression, so that it is saturated over 100% relative air humidity. As a result, a slightly supersaturated airflow is available for the second compressor stage, which enters the compressor after heat removal via an intermediate cooling having a small number of microdroplets. Therefore, the condensed water evaporates again by the heat of compression in the second stage and the compressed flow ultimately enters the recuperation at a lower temperature than during normal compression. Thus, more heat can be recovered within the recuperation system. Therefore, the electrical energy of the system can be produced having higher efficiency, because the heat dissipation of the overall system decreases. In this article it is presented, how such a process is thermodynamically modelled and how a technical realization can be built after optimization by simulations. Finally, in this study, the process-influencing factors are analyzed to show the highest possible electrical yield of such a system. KW - Micro Gasturbine, Hybrid, SOFC Fuel Cell, Fogging, Efficiency Y1 - 2020 UR - https://iopscience.iop.org/article/10.1088/1757-899X/886/1/012041 U6 - https://doi.org/10.1088/1757-899X/886/1/012041 SN - 1757-899X SP - 1 EP - 8 PB - IOP Science CY - Bristol ET - 1. Auflage ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Antoshkiv, Oleksiy A1 - Himmelberg, Axel A1 - Izweik, Husni Taher A1 - Poojitganont, Thanapol T1 - Brennverfahrensentwicklung für eine neuartige Kreiskolbenmotorenfamilie, Wankelmotorenentwicklung KW - Wankelmotor KW - Verbrennung KW - Brennverfahren KW - Gemischbildung KW - Einspritzung KW - Optimierung Y1 - 2008 ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Dückershoff, Roland A1 - Lehmann, Mario A1 - Prechavut, Nontavut T1 - Micro Turbo-Fuel-Cell-Technology : Hybrid compact turbo machinery technology and thermodynamic aspects regarding design parameters of a high efficient MGT-SOFC-system T2 - 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics N2 - The improvement of decentralised energy supply systems has received an important role in the recent years. One option is the combination of SOFC with recuperated MGT. Here, a new strategy for selecting the system parameters, such as the operating temperature of the SOFC, turbine inlet temperature and the pressure ratio of the hybrid system, is presented. By introducing the heat ratio between the heat required to increase the process gas to the SOFC operating temperature and the heat required to raise the SOCF exhaust gas to the TIT, it was found that high efficiency (approx. 68%) is realisable in a compact hybrid system today. Analysis also shows that the HEX-technology is needed to improve the system effectiveness. Also, high recirculation rates with lower TIT can be considered as the future development direction. In addition, a sample configuration of an oil-free MGT rotor unit with high speed foil bearings is presented. KW - MGT-SOFC KW - Brennstoffzellen KW - Mikrogasturbinen KW - Hybrid Y1 - 2017 UR - http://www.euroturbo.eu/paper/ETC2017-266.pdf U6 - https://doi.org/10.29008/ETC2017-266 SP - 1 EP - 12 ER - TY - CHAP A1 - Berg, Peter A1 - Dückershoff, Roland A1 - Lehmann, Mario A1 - Prechavut, Nontavut T1 - Micro Turbo-Fuel-Cell-Technology: Hybrid compact turbo machinery technology and thermodynamic aspects regarding design parameters of a high efficient MGT-SOFC-system T2 - Proceedings of 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, ETC12, April 3 - 7, 2017, Stockholm, Sweden N2 - The improvement of decentralised energy supply systems has received an important role in the recent years. One option therefore is the combination of SOFC with a recuperated MGT. Here, a new strategy for selecting the system parameters, such as the operating temperature of the SOFC, the turbine inlet temperature and the pressure ratio of the hybrid system, is presented. By introducing the heat ratio between the heat required to increase the process gas to the SOFC operating temperature and the heat required to raise the SOCF exhaust gas to the TIT, it was found that high efficiency (approx. 68%) is realisable in a compact hybrid system today. Analysis also shows that the HEX-technology is needed to improve the system effectiveness. Also, high recirculation rates with lower TIT can be considered as the future development direction. In addition, a sample configuration of an oil-free MGT rotor unit with high speed foil bearings is presented. KW - Turbo machinery KW - SOFC KW - Thermodynamic KW - CHP KW - Foil bearings Y1 - 2017 UR - http://www.euroturbo.eu/paper/ETC2017-266.pdf ER - TY - CHAP A1 - Berg, Peter A1 - Himmelberg, Axel A1 - Malenky, Uwe A1 - Meincke, Marie A1 - Soontornpasatch, Tosaporns T1 - Hybrides Turbo Compound Fan Triebwerk T2 - Deutscher Luft- und Raumfahrtkongress 2016, Braunschweig N2 - Der Weg zum elektrischen Fliegen ist abhängig von der Entwicklung hochleistungsfähiger, kompakter und vor allem leichter Energiespeicher. Als mittelfristige, umweltschonende Überganglösung bieten sich, insbesondere für Flugtriebwerke mittlerer Leistungsklassen, Hybridsysteme aus Turbo-Compound-Kreiskolbenmotoren und Elektromaschinen für die Start- und Steigphasen an. Vorgestellt werden auf dem HSD-Konzept (HSD=Hybrid Super-Drive, vgl. [1]) beruhende luftfahrtechnische Anwendungen für unterschiedliche parallelhybride Flugantriebe. Die Basistechnologie stützt sich auf eine in der Produktion befindliche, vielstofffähige Wankeltriebwerksfamilie. Das HSD-Konzept legt hierbei ein Kammervolumen von 650ccm zu Grunde. Der Leistungsbereich (0,8 bis 1,36MW) wird mit einem innovativen elektrischen parallel-hybriden Turbo-Compound-Konzept abgedeckt. Hierbei kommt zur Aufladung der Kreiskolben-Verbrennungsmaschine eine neuartige luftgelagerte Turbomaschine mit integrierter E-Maschine zum Einsatz. Als Vortriebstechnologie trägt das Counter-Rotating-Fan (CRF)-Konzept, welches am Beispiel eines Flugzeugtechnologieträgers (Light-Jet) dargestellt wird, zur weiteren Steigerung der Wirtschaftlichkeit des Gesamtsystems bei. Der vorliegende Artikel basiert auf den in [1] beschrieben Grundlagen und stellt eine weiterführende Diskussion im Rahmen des DLRK dar. KW - Hyrides Fliegen KW - Luftfahrtantriebe Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-201610075510 PB - Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V CY - Bonn ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Berg, Heinz Peter A1 - Steinberg, Peter T1 - Multifunktionale Kraft-Wärme-Kopplung in einer Fahrzeuganwendung (ACG) am Beispiel eines Traktors T2 - Wärmemanagement des Kraftfahrzeugs, Bd. 6 KW - Automotive Co-Generator KW - Energiemanagement KW - BHKW KW - Kraftwärme Kopplung Y1 - 2008 SN - 978-3-8169-2820-1 SN - 3-8169-2651-7 SP - 242 EP - 251 PB - Expert-Verlag CY - Renningen ER - TY - GEN A1 - Rabe, Guido A1 - Dückershoff, Roland A1 - Berg, Heinz Peter T1 - Ein Beitrag zur Schadstoffreduzierung zukünftiger Gasturbinen durch moderne Kühlverfahren KW - Schadstoffreduzierung Gasturbinen Y1 - 2002 ER - TY - CHAP A1 - Rabe, Guido T1 - Untersuchung des Mischungsverhaltens eines ballistischen Kühlluftstrahls in der Heißgasturbine KW - ballistisch KW - Heißgasturbine KW - Mischungsverhalten Y1 - 2002 ER - TY - GEN A1 - Dückershoff, Roland A1 - Biesold, Volker A1 - Berg, Heinz Peter T1 - Einsatz der Laser Patricle Image Velocimetry und der Ammoniak-Diazo-Messtechnik bei der Entwicklung moderner Hochdruckturbinen mit lokalem Druckaufbau und zeitlich begrenzter Strömungsablösung KW - Laser Patricle Image Velocimetry Ammoniak Diazo Y1 - 2002 ER - TY - CHAP A1 - Feiler, Christoph A1 - Berg, Heinz Peter T1 - Strömungsfeldvermessung und Wärmeübergangsmessung an Reynolds-ähnlichen Turbinenkaskaden T2 - Motto: Luft- und Raumfahrt - Schmelztiegel der Disziplinen, Deutscher Luft- und Raumfahrtkongress 2002, Stuttgart, 23. bis 26. September 2002, Bd. 3 KW - Strömungsfeldvermessung und Wärmeübergangsmessung an Reynolds-ähnlichen Turbinenkaskaden Y1 - 2002 SP - 1821 EP - 1831 PB - DGLR CY - Bonn ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Antoshkiv, Oleksiy A1 - Chen, X.-M. A1 - Liu, F. T1 - Einsatz von neuartigen Entwicklungswerkzeugen bei der Brennraumgestaltung von Flugmotoren T2 - Motto: Luft- und Raumfahrt - Schmelztiegel der Disziplinen, Deutscher Luft- und Raumfahrtkongress 2002, Stuttgart, 23. bis 26. September 2002, Bd. 2 Y1 - 2002 SP - 1499 EP - 1506 PB - DGLR CY - Bonn ER - TY - JOUR A1 - Chen, X.-M. A1 - Liu, Fushui A1 - Berg, Heinz Peter T1 - Untersuchung der Zylinderinnenströmung an einen BDE - Motor mittels Laser - PIV Y1 - 2002 ER - TY - JOUR A1 - Chen, X. A1 - Berg, Heinz Peter A1 - Keil, M. T1 - Flexible dynamische Messdatenerfassung an einem Motorprüfstand Y1 - 2002 ER - TY - CHAP A1 - Ahlinder, Stefan A1 - Berg, Heinz Peter A1 - Reile, E. T1 - Modelling of compact tube bundle heat exchanger as porous medium using Reynold´s anallgy N2 - Numerische Untersuchung der Strömung und der Wärmeübertragung in einem kompakten Rohrbündel-Wärmetauscher, der als poröses Medium modelliert ist. KW - modelling KW - compact tube bundle heat exchanger KW - porous medium modelling KW - CFX-TASCflow KW - CFD KW - flow KW - heat transfer KW - hot gas flow Y1 - 2005 ER - TY - CHAP A1 - Rebe, Guido A1 - Benton, R. A1 - Schiffer, Heinz Peter T1 - Ballistic Film Cooling of Turbine Nozzle Guide Vane Platforms KW - ballistische Filmkühlung KW - ballistic film Cooling KW - Endwand KW - Plattform KW - Turbinenleitschaufel KW - turbine nozzle guide vane Y1 - 2005 ER - TY - THES A1 - Feiler, Christoph T1 - Experimentelle Untersuchung nicht-axialsymmetrisch konturierter Turbinenplattformen KW - Turbinenleitstufe KW - Turbine KW - nicht-axialsymmetrisch konturiert KW - Wärme-Stoffanalogie KW - Sekundärströmung KW - Windkanal KW - Naphtalin KW - Ammoniak-Diazoverfahren KW - 5-Lochsonden KW - Schichtdeckenmessung KW - Berechnung Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-000000922 ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Steinberg, Peter T1 - Vielstofffähiger "Turbo-Range-Extender (TRE)": Ein technologischer Anstoß für die Elektromobilität der Zukunft KW - Rangeextender KW - Mikrogasturbine KW - Hybridauto KW - Energiemanagement Y1 - 2010 ER - TY - CHAP A1 - Antoshkiv, Oleksiy A1 - Krüger, Falko A1 - Sarradj, Ennes A1 - Berg, Heinz Peter T1 - Acoustical Diagnostic of Spray-Airflow Interaction in a Modern Aero Engine Combustor Chamber T2 - Deutscher Luft- und Raumfahrtkongress 2009, Bd. Manuskripte Y1 - 2009 SN - 978-3-932182-64-8 SN - 978-3-932182-64-2 PB - DGLR CY - Bonn ER - TY - THES A1 - Antoshkiv, Oleksiy T1 - Untersuchung der Zündung in einer neuartigen gestuften Brennkammer KW - Triebwerk KW - Brennkammer KW - Zündung Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-3739 ER - TY - CHAP A1 - Rabe, Guido A1 - Berg, Heinz Peter A1 - Schiffer, Heinz Peter A1 - Benton, R. T1 - Experimentelle Untersuchungen zur "ballistischen" Plattformkühlung Y1 - 2003 ER - TY - CHAP A1 - Dückershoff, Roland A1 - Biesold, Volker A1 - Berg, Heinz Peter T1 - Filmkühlung bei verzögerter Hauptströmung und lokaler Strömungsablösung T2 - Motto: Luft- und Raumfahrt - Made in Germany, Deutsche Technologie im internationalen Wettbewerb, Deutscher Luft- und Raumfahrtkongress 2001, Hamburg, 17. - 20. September 2001, Bd. 3 Y1 - 2001 SP - 1715 EP - 1720 PB - DGLR CY - Bonn ER - TY - JOUR A1 - Dückershoff, Roland A1 - Biesold, Volker A1 - Berg, Heinz Peter T1 - Einsatz der Laser-Patricle-Image Velocimetry und der Ammoniak-Diazo-Messtechnik zur Untersuchung der Filmkühlung zukünftiger Hochdruckturbinen Y1 - 2002 ER - TY - CHAP A1 - Berg, Heinz Peter A1 - Malenky, Uwe A1 - Antoshkiv, Oleksiy A1 - Mattke, Robert T1 - Kompakte hocheffektive Mikrogasturbine mit integriertem Generator (MTIG): eine Komponente für die seriellen hybriden Antriebssysteme der Elektroflugzeuge von morgen T2 - Deutscher Luft- und Raumfahrtkongress 2015 Rostock N2 - Bei der Neugestaltung unserer zukünftigen Lebensräume sucht die Forschung nach neuartigen Lösungen für die bodengebundene Mobilität. Weiterhin spielt die Erforschung umweltverträglicher Antriebstechnologien für die Luftfahrt der Zukunft eine wichtige Rolle. Neben den rein elektrischen Antrieben stehen insbesondere fortschrittliche hybride Antriebssysteme im Vordergrund. Systemlösungen werden kurz- bis mittelfristig für die unbemannten Flugzeuge und die allgemeine Luftfahrt benötigt. Es werden effiziente Flugantriebssysteme benötigt, die gegenüber aktuellen Antriebssystemen deutlich weniger Schadstoffe emittieren und Brennstoff-ressourcen schonen. Dabei bietet der Elektroantrieb ein großes Potenzial. Aufgrund des derzeitig ungünsti-gen Verhältnisses zwischen Gewicht und Energieinhalt bei Traktionsbatterien ist jedoch die rein elektrische Flugweise nur für einen sehr kleinen Anwendungsbereich interessant. Deshalb müssen Elektroluftfahrzeuge mit zusätzlichen Energiewandlern und Speichern ausgestattet werden, um akzeptable Reichweiten und An-triebsleistungen bei moderaten Kosten zu gewährleisten. Als zukunftsfähiges Antriebskonzept wird u.a. das hybride elektrische Antriebssystem mit Kleinenergieerzeugern zur Reichweitenverlängerung angesehen. Für den Einsatz als Range-Extender stehen unterschiedliche Konzepte zur Verfügung, die eine Umwandlung von chemischer in elektrische Energie ermöglichen. Die Spezifikation eines Range-Extenders hängt dabei sehr stark von den Anforderungen an zukünftige Antriebskonzepte ab. Das bedeutet, dass Einbauraum, Gewicht, Kosten und Vielstofftauglichkeit eine neu zu definierende Gewichtung im Auswahlprozess des Energiewand-lers erhalten. Schwerpunkt des Beitrages ist die Entwicklung und Applikation eines alternativen Energieum-wandlungskonzeptes für E-Luftfahrzeuge traditioneller Bauweise (z.B. zur Verlängerung der Reichweite bei E-Kleinflugzeugen) und für innovative Luftfahrzeuge (als systemintegraler Bestandteil). Bei diesem Konzept handelt es sich um eine Mikrogasturbinen-Generator-Einheit, welche durch einen Rekuperator (Wärmetau-scher zur Abgaswärmenutzung) einen hohen Wirkungsgrad ermöglicht und durch eine weitere Prozesshybri-disierung (z.B. mit eingebetteter SOFC) auch für nicht luftfahrttechnische Bereiche interessant ist. Es werden die Mikrogasturbinen-Generator (MTG)–Basistechnologie beschrieben und die Leistung, der Wirkungsgrad und die Vielstofffähigkeit diskutiert. Außerdem wird eine kompakte Abwandlung mit integriertem Generator (sogenannte MTiG) dargestellt. Weiterhin wird die Bedeutung der Mikrogasturbinenbauart für ein zukünftiges MTG/MTiG-SOFC-Hochwirkungsgradsystem erklärt und die hohe luftfahrttechnische Tauglichkeit der kom-pakten, rekuperierten MTiG-Mikrogasturbinentechnologie für die seriellen hybriden Flugtriebwerkssysteme aufgezeigt. KW - hybride Antriebssysteme, Mikrogastrubine, MTiG; Elektroflugzeuge Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-20151109556 PB - Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. CY - Bonn ER - TY - CHAP A1 - Prechavut, Nontavut A1 - Berg, Heinz Peter T1 - An Experimental Study on Structural Characteristics of Cantilever-Type Foil Bearings T2 - Deutscher Luft- und Raumfahrtkongress 2015 N2 - Capable of high-speed and high-temperature operation, together with an "oil-free" technology concept, gas foil bearings are a perfect solution for a novel light weight (small scale) turbo machinery. While the gas film geometry and the pressure build-up are similar to other gas lubricated bearings, and as it has been well formulated in the hydrodynamic lubrication theory, the compliant structure of the foil bearings have a variety of forms and characteristics. The cantilever-type of foil bearings are one sort of foil bearings that uses a pattern of small cantilever beams as support structure which is very robust and eases the manufacturing process. The aim of this paper is to present a measurement method and results of structural stiffness and damping characteristics of exemplary 50 mm tree-lobes radial foil bearings. Static structural test result shows that the bearing has a wide range of linear stiffness in the bearing's center area. The ramp of cartridge inner surface contour causes a cross coupling effect which may cause instability by a large rotor orbit. Increasing in bear - ing preload result in slightly increasing in static stiffness. In dynamic excitation test, the result shows that the dynamic stiffness is about three times higher than the static one. With a simple model of dry friction, the result shows that the dry friction coefficient is in a range of 0.4 to 0.7. The result also shows that the dynamic stiffness is more sensitive to vibration amplitude than frequency. While the damping decreases significantly with exciting frequency, especially at the vicinity of the rigid body resonance. The result evidence that the magnitude of displacement has a great effect on damping. As displacement amplitude decreases, the bearing is better in damping. KW - Air Bearings, Luftlager Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-201511275091 PB - Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. CY - Bonn ER - TY - GEN A1 - Mardi Kolur, Mohsen A1 - Antoshkiv, Oleksiy A1 - Berg, Heinz Peter T1 - Experimental analysis of the effect of nano-metals and novel organic additives on performance and emissions of a diesel engine T2 - Fuel Processing Technology N2 - The present study focuses on performance and emission characteristics of three emulsion fuels with different additives on a single cylinder CI engine. Each of these emulsified fuels is distinctively engineered to be an alternative fuel for diesel engines. The test fuels are diesel, biodiesel, an emulsion fuel with 86% biodiesel, 5% DEE, 3% Ethanol, 50 ppm CNT, 2% Water, 2% Tween 80 and 2% Span 80 (BD.CNT.DEE.E), an emulsion fuel with 86% biodiesel, 5% EHN, 3% Methanol, 50 ppm Al2O3, 2% Water, 2% Tween 80 and 2% Span 80 (BD.ALO.EHN.M) and an emulsion fuel with 86% biodiesel, 5% Glycerine, 3% Butanol, 50 ppm TiO2, 2% Water, 2% Tween 80 and 2% Span 80 (BD.TIO.GLC.B). Experimental results revealed that BD.CNT.DEE.E has significant improvement compared to diesel and biodiesel in every aspect of performance such as enhanced brake power and brake thermal efficiency by 8.1% and 4.5%, respectively along with the most BSFC reduction by 4%. It also shows exceptional reduction in all emissions compared to biodiesel by 26%, 7.5%, 9.2% and 36% in CO, UHC, NOx and smoke, respectively. BD.ALO.EHN.M also shows considerable improvement in performance including the highest brake thermal efficiency with 6% increment and decline in all emissions except UHC, compared to biodiesel. Finally, BD.TIO.GLC.B shows a slight drop in performance with 6.6% drop in brake thermal efficiency, but on the other hand it has the lowest smoke opacity by a plummet of 74.3%, 20% decline in CO and 10.7% reduction in NOx compared to biodiesel. Therefore, it can be deducted that the emulsion fuels with the proper additives including oxygenated fuels, nano metals, stabilizers, cetane improvers and mixture emulsifiers could ensure clean and renewable alternatives for diesel engines. KW - diesel engine KW - organic additives KW - emission reduction KW - emulsion fuel Y1 - 2019 UR - https://www.sciencedirect.com/science/article/pii/S0378382019311397 U6 - https://doi.org/10.1016/j.fuproc.2019.106166 SN - 0378-3820 VL - 196 SP - 1 EP - 10 ER - TY - GEN A1 - Berg, Heinz Peter A1 - Himmelberg, Axel A1 - Poojitganont, Thanapol T1 - Hybrid Turbo Compound Fan Engine an Eco-Efficient Propulsion System for Aviation T2 - Materials Science and Engineering : Thai Society of Mechanical Engineering, the 10th International Conference on Mechanical Engineering (TSME-ICOME2019) 10-13 December 2019, Pattaya, Thailand N2 - The path to electric propulsion systems depends on the development of powerful, compact and very light energy storage system with a high storage density. In order to create an environment-friendly intermediate solution in the medium term, especially for aircraft engines of medium power classes, it makes sense to use an innovative, electrically parallel hybrid unit based on rotary engines and electric boosters for start and climb phases as a propulsion system. An aero-engine application, based on the HSD concept (HSD = hybrid super-drive – hybrid Wankel rotary engine) for different hybrid-parallel propulsion systems is presented. In this article, the introduced technology is based on a currently produced family of multi-component Wankel rotary engines. The proposed HSD concept uses a chamber volume of 650ccm per rotor. The projected power range (0.8 to 1.36 MW) is covered by an innovative hybrid electric parallel turbo compound concept together with 2x4 rotary engine units. A novel, airbearing turbo engine with integrated electric drive is used as a turbocharger for charging the rotary engine. For the aero-engine technology, the counter-rotating fan (CRF) concept shown as an example for an aircraft technolo¬gy carrier (light jet) leads to a further increase in the efficiency of a complete system. KW - rotary engine, hybrid combustion engine, aero-engine, air bearing, counter rotating fan, electric flight Y1 - 2020 UR - https://iopscience.iop.org/article/10.1088/1757-899X/886/1/012010 U6 - https://doi.org/10.1088/1757-899X/886/1/012010 SN - 1757-899X VL - 2020 PB - IOP Science CY - Bristol ET - 1. Auflage ER - TY - GEN A1 - Poojitganont, Thanapol A1 - Antoshkiv, Oleksiy A1 - Watjatrakul, Boonchai A1 - Berg, Heinz Peter ED - Ashton, Anete T1 - Efficiency and Emission Simulations of Hydrogen-Fuel City Buses T2 - IOP Conference Series: Materials Science and Engineering N2 - In this study, the AVL Cruise is implemented to simulate driving parameters including the driving path, the power loss on engine accessories, the gear-shifting scheme and the engine's fuel cut-off strategy influencing the bus fuel efficiency and emission. The Mercedes Conecto LF city bus using a diesel engine with Standardised On-Road Test Cycles was firstly simulated and compared with available literature. The application of hydrogen fuel was then examined and its result was compared with the diesel fuel on the specific fuel consumption. In addition, the driving cycles in Bangkok were simulated. The results show the pattern on both driving cycles with different fuel are similar, however, the fuel consumption of H2 is significantly less than in the case of Diesel. Moreover, it is also evident that the SORT driving cycle cannot represent the heavy traffic of Bangkok. KW - Efficiency, Emission Simulations, Hydrogen-Fuel, Driving Cycles, AVL Cruise Y1 - 2020 UR - https://iopscience.iop.org/article/10.1088/1757-899X/886/1/012025 U6 - https://doi.org/10.1088/1757-899X/886/1/012025 SN - 1757-899X SP - 1 EP - 8 PB - IOP Science CY - Bristol ET - 1. Auflage ER - TY - CHAP A1 - Bondarenko, Evgeniiy A1 - Berg, Heinz Peter A1 - Antoshkiv, Oleksiy ED - Steinberg, Peter T1 - Untersuchung des Verbrauchs- und Rekuperationspotentials eines Elektrobusses mit Turbo-Range-Extender mittels AVL Cruise T2 - Wärmemanagement des Kraftfahrzeugs IX KW - Rekuperationspotential KW - Elektrobus Y1 - 2014 SN - 978-3-8169-3275-8 SP - 341 EP - 356 PB - expert Verlag CY - Potsdam ER - TY - JOUR A1 - Ahlinder, Stefan A1 - Biesold, Volker A1 - Berg, Heinz Peter T1 - Hot side flow investigation on the exhaust case of a recuperated industrial gas turbine KW - Wärmetauscher KW - Gasturbine KW - Rekuperator Y1 - 2006 ER - TY - CHAP A1 - Poojitganont, Thanapol A1 - Izweik, Husni Taher A1 - Berg, Heinz Peter T1 - "Simulation of Flow Field inside the Wankel Combustion Chamber" KW - Wankel KW - Strömung KW - Simulation KW - Gemischbildung Y1 - 2006 ER - TY - GEN A1 - Xie, Tianxiao A1 - Mathiazhagan, Akilan A1 - Barkowski, Daniel A1 - Starick, Tommy A1 - Berg, Heinz Peter A1 - Höschler, Klaus T1 - Comparison of convective heat transfer in metal foam-filled channels of three different cross-sections T2 - Numerical Heat Transfer, Part A: Applications N2 - This work introduces a new approach of analyzing convective heat transfer in porous medium by considering the foam structure as a type of fin. It provides the resulting heat transfer characteristics for the design of a longitudinally flowed tube bundle reformer used for the Micro Gas Turbine Solid Oxide Fuel Cell (MGT-SOFC) hybrid process. Owing to a limited experimental database available in literature for the above-mentioned situation, a physical model is initially introduced for a channel flow configuration between two large flat plates using a commercial PDE solver. This model is then validated with experimental results available in literature. A comparison with theoretical solutions is also conducted. Later, this model is modified/adapted for a pipe flow configuration. The physical model for a channel with representative cross-section shape of a longitudinally flowed tube bundle is more complex and is therefore built in a commercial CFD-Solver. A comparative study of the heat transfer behavior in channels of different cross-sections is performed based on a new dimensionless correlation, whose physical coherence with fin efficiency is explained and mathematically proved. The applicability of the heat transfer correlation from one cross-sectional shape to the other are discussed. The proposed new treatment of the porous medium as a fin structure considerably simplifies the heat transfer analysis in porous medium by the clear physical meaning behind fin efficiency and Biot number. This relationship contributes to a better understanding of the heat heat transfer characteristics in porous media in contrast to the correlation between Nusselt number and Reynolds number. Furthermore, this correlation enables a direct comparison between foam structures of different parameters because the fin efficiency is always between 0 and 1. The strong physical background of new correlations also enhances the reliability and plausibility at characterizing and designing the metal foam for heat transfer enhancement. KW - Channel flow with different cross-section KW - Forced convection KW - Heat transfer in porous media KW - New heat transfer correlations Y1 - 2023 U6 - https://doi.org/10.1080/10407782.2023.2181892 SN - 1521-0634 SN - 1040-7782 VL - 85 IS - 2 SP - 222 EP - 236 ER -