TY - JOUR AU - Hami Dindar, Iman AU - Mirzaei, Mona AU - Baumhögger, Elmar AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 52097 JF - Journal of Chemical & Engineering Data KW - General Chemical Engineering KW - General Chemistry SN - 0021-9568 TI - Experimental and Theoretical Investigation of CO2 Absorption in Aqueous Solution of Glucosamine: Material Property and Equilibrium Data ER - TY - JOUR AU - Weber, Mike AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 52226 JF - Industrial & Engineering Chemistry Research KW - Industrial and Manufacturing Engineering KW - General Chemical Engineering KW - General Chemistry SN - 0888-5885 TI - Dynamics of an Absorption/Desorption Plant: Experimental Study and Model Validation ER - TY - JOUR AU - Bruns, Bastian AU - Gross, Michel AU - Grünewald, Marcus AU - Bertsch, Valentin AU - Riese, Julia ID - 52229 JF - Journal of Cleaner Production KW - Industrial and Manufacturing Engineering KW - Strategy and Management KW - General Environmental Science KW - Renewable Energy KW - Sustainability and the Environment KW - Building and Construction SN - 0959-6526 TI - A multi-step framework for the design of a flexible power-to-methane process ER - TY - JOUR AU - Riese, Julia AU - Fasel, Henrik AU - Pannok, Maik AU - Lier, Stefan ID - 52388 JF - Sustainable Production and Consumption KW - Industrial and Manufacturing Engineering KW - Renewable Energy KW - Sustainability and the Environment KW - Environmental Chemistry KW - Environmental Engineering SN - 2352-5509 TI - Decentralized production concepts for bio-based polymers - implications for supply chains, costs, and the carbon footprint ER - TY - GEN AU - Hami Dindar, Iman AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 52579 TI - Wässrige Glucosaminlösung als neues Lösungsmittel zur CO2-Abscheidung ER - TY - JOUR AB - Die Wirtschaftlichkeit von Wärmemotoren wird maßgeblich durch die Rückführung von Wärme in Rekuperatoren beeinflusst. Beim isobaren Expansionsmotor vom Bush-Typ, einem Wärmemotor, welcher bereits mit Wärmequellen ab 60°C betrieben werden kann, steigt der thermische Wirkungsgrad durch den Einsatz von Rekuperatoren signifikant. Gleichzeitig wirken sich das Fluidvolumen des Wärmeübertragers sowie der beim Betrieb auftretende Druckverlust negativ auf den thermischen Wirkungsrad aus. In dieser Arbeit wird der Zusammenhang von Totvolumen, Druckverlust und Wärmerückgewinnung untersucht und Empfehlungen für den Betrieb von Rekuperatoren am isobaren Expansionsmotor gegeben. AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Kenig, Eugeny Y. ID - 42252 IS - 5 JF - Chemie Ingenieur Technik KW - Isobarer Expansionsmotor KW - Dynamische Wärmeübertragungsmodellierung KW - Phasenwechsel KW - dichte Arbeitsmedien TI - Untersuchung überlagerter Effekte von Druckverlust und Totvolumen durch Rekuperation am isobaren Expansionsmotor VL - 95 ER - TY - GEN AU - Lutters, Nicole AU - Buckmann, Felix AU - Kenig, Eugeny Y. ID - 43280 TI - Zur experimentellen Untersuchung der Reinstoffkondensation in Kissenplatten-Wärmeübertragern ER - TY - CONF AU - Bernemann, Sören Antonius AU - Maćkowiak, Jan AU - Maćkowiak, Jerzy AU - Kenig, Eugeny ID - 43393 TI - Computerunterstützte Strömungsuntersuchung von landwirtschaftlichen Abfällen ER - TY - GEN AU - Dechert, Christopher AU - Kengni Nkouemou, Augustin AU - Kenig, Eugeny Y. ID - 43111 TI - Vergleichende Untersuchung der Wirkung verschiedener Mikrostrukturen auf die Flüssigkeitsausbreitung ER - TY - GEN AU - Mamedov, Tural AU - Schleicher, Eckhard AU - Schubert, Markus AU - Ehlert, Thomas AU - Kenig, Eugeny Y. AU - Hampel, Uwe ID - 44096 TI - Experimental analysis of ship motion effects on the performance of an absorption column equipped with structured packings ER - TY - GEN AU - Ehlert, Thomas AU - Mamedov, Tural AU - Schubert, Markus AU - Kenig, Eugeny Y. ID - 44094 TI - Charakterisierung des Einflusses neigungsinduzierter Strömungsformen mit dem Ansatz der hydrodynamsichen Analogie ER - TY - GEN AU - Ehlert, Thomas AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 44095 TI - Modellierung des Randspalts in Strukturpackungskolonnen mit dem Ansatz der hydrodynamischen Analogien ER - TY - JOUR AB - The technical importance of paraffins as phase change materials (PCM) in heat storage systems increases. Knowledge on the thermal conductivity of paraffins is necessary for the design and optimization of heat storage systems. However, for most paraffins solely the thermal conductivity of the liquid state has been sufficiently investigated. For the solid state, precise thermal conductivity data are only known for a few paraffins, while only generalized values are available for the remainder, some of which contradict each other. In this study, a measurement setup based on the modified guarded hot plate method is developed. It is used to investigate the thermal conductivity of several paraffines in the solid state, including pure n-docosane and its compounds with different types and concentrations of graphite. For n-docosane in the solid state, the thermal conductivity is determined to be 0.49 W/(m K). A particle size of 200 μm with a spherical shape turns out to be optimal to increase the thermal conductivity. This allows the thermal conductivity of a compound with 10% graphite to increase by a factor of three compared to the pure paraffin. Furthermore, significant differences to thermal conductivity data from the literature are found. AU - Paul, Andreas AU - Baumhögger, Elmar AU - Dewerth, Mats-Ole AU - Hami Dindar, Iman AU - Sonnenrein, Gerrit AU - Vrabec, Jadran ID - 43391 JF - Journal of Thermal Analysis and Calorimetry KW - Physical and Theoretical Chemistry KW - Condensed Matter Physics SN - 1388-6150 TI - Thermal conductivity of solid paraffins and several n-docosane compounds with graphite ER - TY - CONF AU - Hami Dindar, Iman AU - Lutters, Nicole AU - Kenig, Eugeny ID - 44320 T2 - Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Adsoprtion TI - Wässrige Glucosaminlösung als neues Lösungsmittel zur CO2-Abscheidung ER - TY - GEN AU - Salten, Alexander Heinrich Johannes AU - Al Trjman, Mohamad AU - Meschut, Gerson AU - Kenig, Eugeny Y. ID - 44228 TI - Simulation des „viscous fingering“ Effektes in Klebverbindungen ER - TY - GEN AU - Al Trjman, Mohamad AU - Meschut, Gerson AU - Salten, Alexander Heinrich Johannes AU - Kenig, Eugeny Y. ID - 44227 TI - Methodenentwicklung zur Simulation des Viscous Fingering in Klebverbindungen von stahlintensiven Mischbaustrukturen ER - TY - GEN AU - Afsahnoudeh, Reza AU - Holzmüller, Maik AU - Bader, Fabian AU - Homberg, Werner AU - Kenig, Eugeny Y. ID - 28941 TI - Numerische Untersuchung von Oberflächenstrukturierung zur Erhöhung der Effizienz von Kissenplatten-Wärmeübertragern ER - TY - JOUR AU - Afsahnoudeh, Reza AU - Wortmeier, Andreas AU - Holzmüller, Maik AU - XGong, Yi AU - Homberg, Werner AU - Kenig, Eugeny Y. ID - 48498 IS - 21 JF - Energies TI - Thermo-hydraulic Performance of Pillow-Plate Heat Exchangers with Secondary Structuring: A Numerical Analysis VL - 16 ER - TY - GEN AU - Hollenhorst, Viola AU - Kenig, Eugeny Y. ID - 43047 TI - CFD-Untersuchungen der Fluiddynamik und des Wärmetransports an rauen Oberflächen ER - TY - THES AB - Füllkörper spielen in industriellen Trennprozessen eine wichtige Rolle bspw. bei der Reinigung industrieller Abgase durch Absorption. Die Trennleistung von Füllkörperkolonnen wird üblicherweise mittels vereinfachter Stufenmodelle ermittelt, deren Modellparameter experimentell bestimmt werden müssen. Dies stellt eine große Schwäche von Stufenmodellen dar, da diese Parameterim Allgemeinen nicht auf verschiedene Stoffsysteme und Füllkörpertypen übertragbar sind.In dieser Arbeit wird ein Modell, basierend auf dem hydrodynamischen Analogieansatz, zur Beschreibung von Absorptionsvorgängen in Füllkörperkolonnen vorgestellt. Dabei ist die Geometrie der festen Phase direkt abhängig von der Füllkörpergeometrie und der Stochastik der Schüttung. Die tatsächlichen Strömungsverhältnisse in Füllkörperkolonnen werden erfasst und durch eine Kombination vereinfachter charakteristischer Strömungsformen reproduziert. Dies erlaubt die Verwendung rigoroser Transportgleichung. Dadurch enthält das Modell weniger experimentell zu ermittelnde Parameter und ist damit unabhängiger von Experimenten als vereinfachte Stufenmodelle. Das Modell wurde gegen experimentelle Daten zur CO2-Absorption in wässrige Natronlauge validiert. Mit dem entwickelten Modell wurde anschließend eine Parameterstudie durchgeführt, die der Unterstützung der Entwicklung neuer Füllkörpergeometrien dient. Dazu wurde eine Simulationsstudie durchgeführt, die den Einfluss der Füllkörpergeometrie auf die Trennleistung untersucht. AU - Salten, Alexander Heinrich Johannes ID - 52402 TI - Modellierung der Reaktivabsorption in regellosen Schüttungen und modellbasierte Optimierung von Füllkörpern mit dem Ansatz der hydrodynamischen Analogien ER - TY - JOUR AU - Röder, Lilli Sophia AU - Gröngröft, Arne AU - Grünewald, Marcus AU - Riese, Julia ID - 51360 JF - Chemical Engineering Transactions TI - Demand Side Management Implementation in Downstream Digestate Treatment of a Biomethane Biorefinery VL - 105 ER - TY - CONF AU - Wende, Marc AU - Fischer, Florian AU - Kenig, Eugeny ID - 31069 T2 - Jahrestreffen der ProcessNet Fachgruppen Fluidverfahrenstechnik und Hochdruckverfahrenstechnik TI - Experimentelle Untersuchung und Modellvalidierung zur Gravidestillation ER - TY - GEN AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Kenig, Eugeny ID - 32446 T2 - Annual Meeting on Reaction Engineering and ProcessNet Subject Division Heat and Mass Transfer TI - Heat regeneration model for external heat engines operating with dense working fluids ER - TY - GEN AU - Haase, Michael AU - Tasche, Frederik AU - Bieber, Maximilian AU - Zibart, Alexander ID - 34020 TI - Innovative Leichtbau- und Kühlungskonzepte für elektrische Maschinen durch additive Fertigung (ILuKadd3D) VL - Heft 1526 ER - TY - CONF AU - Bernemann, Sören Antonius AU - Maćkowiak, Jan AU - Maćkowiak, Jerzy AU - Bertling, René AU - Lutters, Nicole AU - Kenig, Eugeny ID - 31171 TI - Entwicklung eines innovativen Trennapparates zur Stickstoffrückgewinnung aus landwirtschaftlichen Abfällen ER - TY - JOUR AB - An explicit approach using symplectic time integration in conjunction with traditional finite difference spatial derivatives to solve the wave equation in moving media is presented. A simple operator split of this second order wave equation into two coupled first order equations is performed, allowing these split equations to be solved symplectically. Orders of symplectic time integration ranging from first to fourth along with orders of spatial derivatives ranging from second to sixth are explored. The case of cylindrical acoustic spreading in air under a constant velocity in a 2D square structured domain is considered. The variation of the computed time-of-flight, frequency, and wave length are studied with varying grid resolution and the deviations from the analytical solutions are determined. It was found that symplectic time integration interferes with finite difference spatial derivatives higher than second order causing unexpected results. This is actually beneficial for unstructured finite volume tools like OpenFOAM where second order spatial operators are the state-of-the art. Cylindrical acoustic spreading is simulated on an unstructured 2D triangle mesh showing that symplectic time integration is not limited to the spatial discretization paradigm and overcomes the numerical diffusion arising with the in-built numerical methods which hinder wave propagation. AU - Inguva, Venkatesh AU - Feldmann, Nadine AU - Claes, Leander AU - Koturbash, Taras AU - Hahn-Jose, Thomas AU - Koutcherov, Vladimir AU - Kenig, Eugeny ID - 6579 JF - Engineering Reports TI - An explicit symplectic approach to solving the wave equation in moving media ER - TY - GEN AU - Bothe, Mike AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 31070 TI - Untersuchung von Gefahrensituationen bei industriellen Absorption/Desorption-Prozessen mittels dynamischer Simulation ER - TY - CONF AU - Bernemann, Sören Antonius AU - Maćkowiak, Jan AU - Maćkowiak, Jerzy AU - Bertling, René AU - Lutters, Nicole AU - Kenig, Eugeny ID - 33522 KW - CFD KW - simulation KW - agricultural waste KW - multiphase TI - Development of an innovative separation unit for nitrogen recovery from agricultural waste ER - TY - GEN AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Inguva, Venkatesh AU - Kenig, Eugeny Y. ID - 33972 T2 - 1st Conference on Energy, Environment and Digital Transition E2DT TI - A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids ER - TY - CONF AU - Mapura, Luz Alejandra AU - Kenig, Eugeny Y. ID - 33035 T2 - Annual Meeting on Reaction Engineering and ProcessNet Subject Division "Heat and Mass Transfer" TI - Effect of diffusivity and chemical reactions on the determination of mass transfer coefficients in columns with structured packing ER - TY - CONF AU - Buckmann, Felix AU - Kenig, Eugeny ID - 33254 T2 - Annual Meeting on Reaction Engineering and ProcessNet Subject Division "Heat and Mass Transfer" TI - Experimental study on the condensation of pure substances in outer pillow-plate channels ER - TY - GEN AU - Mamedov, Tural AU - Schleicher, Eckhard AU - Schubert, Markus AU - Ehlert, Thomas AU - Kenig, Eugeny Y. ID - 40647 TI - Liquid flow morphology investigation in structured packings for offshore applications using a novel flow imaging sensor ER - TY - GEN AU - Dechert, Christopher AU - Kenig, Eugeny ID - 31183 TI - Untersuchung von kleinskaligen Flüssigkeitselementen auf mikrostrukturierten Packungsoberflächen ER - TY - JOUR AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Inguva, Venkatesh AU - Kenig, Eugeny Y. ID - 34228 JF - Chemical Engineering Transactions SN - 2283-9216 TI - A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids VL - 96 ER - TY - GEN AU - Dechert, Christopher AU - Kenig, Eugeny ID - 33485 T2 - Proceedings of the 12th international conference Distillation & Absorption 2022 TI - CFD-Based Investigation of the Packing Microstructure Influence on Droplet Behavior and Film Flow ER - TY - CONF AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Kenig, Eugeny ID - 31223 T2 - Heat Powered Cycles Conference 2022 TI - On Heat Regeneration Limitations in Heat Engines With Dense Working Fluids ER - TY - CONF AU - Ehlert, Thomas AU - Mamedov, Tural AU - Schubert, Markus AU - Kenig, Eugeny Y. ID - 31186 TI - Modellierung des Stofftransportes in einer geneigten Kolonne mit dem Ansatz der hydrodynamischen Analogien ER - TY - JOUR AU - Bothe, Mike AU - Hami Dindar, Iman AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 33477 JF - Computers and Chemical Engineering TI - Dynamic modeling of absorption/desorption closed-loop including periphery ER - TY - JOUR AU - Schulz, Andreas Markus AU - Wecker, Christian AU - Inguva, Venkatesh AU - Lopatin, Alexey S. AU - Kenig, Eugeny Y. ID - 27375 JF - Chemical Engineering Science TI - A PLIC-based method for species mass transfer at free fluid interfaces VL - 250 ER - TY - JOUR AU - Wecker, Christian AU - Schulz, Andreas Markus AU - Heine, Jens AU - Bart, Hans Jörg AU - Kenig, Eugeny Y. ID - 28942 JF - International Journal of Heat and Mass Transfer TI - Droplet formation –a numerical investigation of liquid-liquid systems with consideration of Marangoni convection VL - 188 ER - TY - JOUR AU - Dai, Daokun AU - Kenig, Eugeny Y. AU - Numrich, Reiner ID - 44239 IS - 6 JF - Chemie Ingenieur Technik KW - Industrial and Manufacturing Engineering KW - General Chemical Engineering KW - General Chemistry SN - 0009-286X TI - Experimentelle Untersuchung der Tropfenkondensation am chemisch modifizierten Edelstahl‐Drallrohr VL - 94 ER - TY - JOUR AU - Inguva, Venkatesh AU - Kenig, Eugeny Y. AU - Perot, J. Blair ID - 44235 JF - Journal of Computational Physics TI - A front-tracking method for two-phase flow simulation with no spurious currents VL - 456 ER - TY - CONF AU - Zibart, Alexander AU - Spang, Bernhard AU - Kenig, Eugeny Y. ID - 44242 SN - 1570-7946 T2 - Computer Aided Chemical Engineering TI - Determination of the burst pressure of pillow plates using finite element methods VL - 51 ER - TY - JOUR AB - In numerous turbomachinery applications, e.g., in aero-engines with regenerators for improving specific fuel consumption (SFC), heat exchangers with low-pressure loss are required. Pil low-plate heat exchangers (PPHE) are a novel exchanger type and promising candidates for high-speed flow applications due to their smooth profiles avoiding blunt obstacles in the flow path. This work deals with the overall system behavior and gas dynamics of pillow-plate channels. A pillow-plate channel was placed in the test section of a blow-down wind tunnel working with dry air, and compressible flow phenomena were investigated utilizing conventional and focusing schlieren optics; furthermore, static and total pressure measurements were performed. The experiments supported the assumption that the system behavior can be described through a Fanno–Rayleigh flow model. Since only wavy walls with smooth profiles were involved, linearized gas dynamics was able to cover important flow features within the channel. The effects of the wavy wall structures on pressure drop and Mach number distribution within the flow path were investigated, and a good qualitative agreement with theoretical and numerical predictions was found. The present analysis demonstrates that pressure losses in pillow-plate heat exchangers are rather low, although their strong turbulent mixing enables high convective heat transfer coefficients. AU - Sundermeier, Stephan AU - Passmann, Maximilian AU - aus der Wiesche, Stefan AU - Kenig, Eugeny Y. ID - 44238 IS - 2 JF - International Journal of Turbomachinery, Propulsion and Power KW - Mechanical Engineering KW - Energy Engineering and Power Technology KW - Aerospace Engineering SN - 2504-186X TI - Flow in Pillow-Plate Channels for High-Speed Turbomachinery Heat Exchangers VL - 7 ER - TY - JOUR AU - Kenig, Eugeny Y. ID - 44243 JF - Chemical Engineering Transactions TI - State-of-the-Art Modeling of Separation Columns: A Review VL - 94 ER - TY - CONF AU - Hami Dindar, Iman AU - Baumhögger, Elmar AU - Lutters, Nicole AU - Kenig, Eugeny ID - 31243 T2 - Jahrestreffen der ProcessNet Fachgruppen Fluidverfahrenstechnik und Hochdruckverfahrenstechnik TI - Wässrige Aminozuckerlösungen als neue Lösungsmittel zur CO2-Abscheidung ER - TY - CONF AU - Mamedov, Tural AU - Schleicher, Eckhard AU - Schubert, Markus AU - Ehlert, Thomas AU - Kenig, Eugeny Y. AU - Hampel, Uwe ID - 33887 T2 - Proceedings of the 12th international conference Distillation & Absorption 2022 TI - Flow Morphology of TEG Desiccant in a Structured Packing Air Dehumidifier Exposed to Floating Conditions ER - TY - JOUR AB - Abstract In two-phase flows in which the Capillary number is low, errors in the computation of the surface tension force at the interface cause Front-Capturing methods such as Volume of Fluid (VOF) and Level-Set (LS) to develop interfacial spurious currents. To better solve low Capillary number flows, special treatment is required to reduce such spurious currents. Smoothing the phase indicator field to more accurately compute the curvature or adding interfacial artificial viscosity are techniques that can treat this problem. This study explores OpenFOAM, Fluent and StarCCM+ VOF solvers for the classical case of a static bubble/droplet immersed in a continuous aqueous phase, with the focus on the ability of these solvers to adequately reduce spurious currents. The results are expected to be helpful for practicing chemical engineers who use multiphase CFD solvers in their work. AU - Inguva, Venkatesh AU - Schulz, Andreas AU - Kenig, Eugeny ID - 23785 JF - Chemical Product and Process Modeling SN - 1934-2659 TI - On methods to reduce spurious currents within VOF solver frameworks. Part 1: a review of the static bubble/droplet VL - 17 ER - TY - JOUR AU - Wende, Marc AU - Staggenborg, Christoph AU - Kenig, Eugeny Y. ID - 44236 JF - Chemical Engineering Science KW - Applied Mathematics KW - Industrial and Manufacturing Engineering KW - General Chemical Engineering KW - General Chemistry SN - 0009-2509 TI - Modelling and simulation of zero-gravity distillation units with metal foams VL - 247 ER - TY - CONF AU - Bothe, Mike AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 33479 T2 - Proceedings of the 12th international conference Distillation & Absorption 2022 TI - Model Based and Experimental Analysis of the Dynamic Reactive Absorption Loop Behavior ER -