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 - Lehnen, Nadine A1 - Radziej, Katharina A1 - Weigel, Angelika A1 - Känel, Roland von A1 - Glasauer, Stefan A1 - Pietron, Victor A1 - Van den Bergh, Omer A1 - Löwe, Bernd A1 - Lehmann, Marco A1 - Henningsen, Peter T1 - Complementing conceptual models of persistent somatic symptoms with mathematical formalization T2 - Psychosomatic Medicine Y1 - 2020 U6 - https://doi.org/10.1097/PSY.0000000000000801 SN - 1534-7796 VL - 82 IS - 5 SP - 527 EP - 528 ER - TY - GEN A1 - Schmidt, Carsten A1 - Schierack, Peter A1 - Gerber, Ulrike A1 - Schröder, Christian A1 - Choi, Youngeun A1 - Bald, Ilko A1 - Lehmann, Werner A1 - Rödiger, Stefan T1 - Streptavidin Homologues for Applications on Solid Surfaces at High Temperatures T2 - Langmuir Y1 - 2020 U6 - https://doi.org/10.1021/acs.langmuir.9b02339 SN - 1520-5827 SN - 0743-7463 VL - 36 IS - 2 SP - 628 EP - 636 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 - GEN A1 - Hanschmann, Henning A1 - Rödiger, Stefan A1 - Kramer, Toni A1 - Hanschmann, Katrin A1 - Steidle, Michael A1 - Fingerle, Volker A1 - Schmidt, Carsten A1 - Lehmann, Werner A1 - Schierack, Peter T1 - LoopTag FRET Probe System for Multiplex qPCR Detection of Borrelia Species T2 - Life Y1 - 2021 U6 - https://doi.org/10.3390/life11111163 SN - 2075-1729 VL - 11 IS - 11 ER - TY - GEN A1 - Schmidt, Carsten A1 - Kammel, Anne A1 - Tanner, Julian A. A1 - Kinghorn, Andrew B. A1 - Khan, Muhammad Moman A1 - Lehmann, Werner A1 - Menger, Marcus A1 - Schedler, Uwe A1 - Schierack, Peter A1 - Rödiger, Stefan T1 - A Multiparametic Fluorescence Assay for Screening Aptamer-Protein Interactions Based on Microbeads T2 - Scientific Reports Y1 - 2022 U6 - https://doi.org/10.1038/s41598-022-06817-0 SN - 2045-2322 VL - 12 ER - TY - GEN A1 - Geithe, Christiane A1 - Zeng, Bo A1 - Schmidt, Carsten A1 - Dinter, Franziska A1 - Roggenbuck, Dirk A1 - Lehmann, Werner A1 - Dame, Gregory A1 - Schierack, Peter A1 - Hanack, Katja A1 - Rödiger, Stefan T1 - A multiplex microchamber diffusion assay for the antibody-based detection of microRNAs on randomly ordered microbeads T2 - Biosensors and Bioelectronics: X Y1 - 2024 U6 - https://doi.org/10.1016/j.biosx.2024.100484 SN - 2590-1370 VL - 18 (2024) SP - 1 EP - 7 PB - Elsevier BV ER - TY - GEN A1 - Hofer, Markus A1 - Lehmann, Peter A1 - Schneider, Anna A1 - Maurer, Thomas A1 - Stähli, Manfred A1 - Krafczyk, Manfred T1 - Modelling the emergence of surface erosion rills in an artificial catchment T2 - Structures and processes of the initial ecosystem development, 1st International Conference assoc. with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 Sept. 2010, Cottbus, Germany Y1 - 2010 SP - S. 53 PB - BTU CY - Cottbus ER - TY - CHAP A1 - Hofer, Markus A1 - Lehmann, Peter A1 - Schneider, Anna A1 - Maurer, Thomas A1 - Stähli, Manfred A1 - Krafczyk, Manfred T1 - Modelling the emergence of surface erosion rills in an artificial catchment T2 - EGU General Assembly 2010, held in Vienna, Austria, 02 – 07 May 2010 Y1 - 2010 N1 - EGU2010-2498 PB - European Geophysical Society CY - Katlenburg-Lindau ER -