TY - CHAP A1 - Schulte, Jonas A1 - Schwager, Christian A1 - Frantz, Cathy A1 - Schloms, Felix A1 - Teixeira Boura, Cristiano José A1 - Herrmann, Ulf T1 - Control concept for a molten salt receiver in star design: Development, optimization and testing with cloud passage scenarios T2 - SolarPACES conference proceedings N2 - A promising approach to reduce the system costs of molten salt solar receivers is to enable the irradiation of the absorber tubes on both sides. The star design is an innovative receiver design, pursuing this approach. The unconventional design leads to new challenges in controlling the system. This paper presents a control concept for a molten salt receiver system in star design. The control parameters are optimized in a defined test cycle by minimizing a cost function. The control concept is tested in realistic cloud passage scenarios based on real weather data. During these tests, the control system showed no sign of unstable behavior, but to perform sufficiently in every scenario further research and development like integrating Model Predictive Controls (MPCs) need to be done. The presented concept is a starting point to do so. KW - Molten salt receiver KW - Star design KW - Control optimization KW - Cloud passages Y1 - 2023 U6 - http://dx.doi.org/10.52825/solarpaces.v1i.693 SN - 2751-9899 (online) N1 - 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA IS - Vol. 1 PB - TIB Open Publishing CY - Hannover ER - TY - JOUR A1 - Krafft, B. A1 - Förster, Arnold A1 - Hart, A. van der A1 - Schäpers, T. T1 - Control of Aharonov-Bohm oscillations in a AlGaAs/GaAs ring by asymmetric and symmetric gate biasing JF - Physica E: Low-dimensional Systems and Nanostructures. 9 (2001), H. 4 Y1 - 2001 SN - 1386-9477 SP - 635 EP - 641 ER - TY - JOUR A1 - Förster, Arnold A1 - Schäpers, T. A1 - Müller, F. T1 - Control of ballistic electrons in (AlGa)As/GaAs heterostructures by means of superconducting niobium gate structures / T. Schäpers ; F. Müller ; A. Förster ... JF - Surface Science. 305 (1994), H. 1-3 Y1 - 1994 SN - 0039-6028 N1 - ISSN der E-Ausg.: 0039-6028 SP - 460 EP - 464 ER - TY - JOUR A1 - Martin, S. A. A1 - Berg, G. P. A. A1 - Hacker, U. A1 - Hardt, Arno A1 - Köhler, M. A1 - Meißburger, J. A1 - Osterfeld, F. A1 - Prasuhn, D. A1 - Riepe, G. A1 - Rogge, M. A1 - Schult, O. W. B. A1 - Speth, J. A1 - Turek, P. A1 - Gaul, G. A1 - Hagedoorn, H. A1 - Heide, J. A. van der A1 - Hinterberger, F. A1 - Huber, M. A1 - Jahn, R. A1 - Mayer-Kuckuk, T. A1 - Poth, H. A1 - Paetz gen. Schieck, H. T1 - COSY - a cooler synchrotron and storage ring JF - IEEE transactions on nuclear science. Vol. 32, iss. 5 Y1 - 1985 SN - 1558-1578 (E-Journal); 0018-9499 (Print) SP - 2694 EP - 2696 ER - TY - JOUR A1 - Tillmann, K. A1 - Förster, Arnold T1 - Critical dimensions for the formation of interfacial misfit dislocations of In0.6Ga0.4As islands on GaAs(001) JF - Thin Solid Films. 368 (2000), H. 1 Y1 - 2000 SN - 0040-6090 SP - 93 EP - 104 ER - TY - JOUR A1 - Förster, Arnold A1 - Verghese, S. A1 - Zamdmer, N. A1 - Hu, Qing T1 - Cryogenic picosecond sampling using fiber-coupled photoconductive switch / S. Verghese ; N. Zamdmer ; Qing Hu ; A. Förster JF - Applied physics letters. 70 (1997), H. 20 Y1 - 1997 SN - 0003-6951 N1 - ISSN der E-Ausg.: 1077-3118 SP - 2644 EP - 2646 ER - TY - CHAP A1 - Butenweg, Christoph A1 - Marinkovic, Marko T1 - Damage reduction system for masonry infill walls under seismic loading T2 - ce/papers N2 - Reinforced concrete (RC) frames with masonry infills are frequently used in seismic regions all over the world. Generally masonry infills are considered as nonstructural elements and thus are typically neglected in the design process. However, the observations made after strong earthquakes have shown that masonry infills can modify the dynamic behavior of the structure significantly. The consequences were total collapses of buildings and loss of human lives. This paper presents the new system INODIS (Innovative Decoupled Infill System) developed within the European research project INSYSME (Innovative Systems for Earthquake Resistant Masonry Enclosures in RC Buildings). INODIS decouples the frame and the masonry infill by means of special U-shaped rubbers placed in between frame and infill. The effectiveness of the system was investigated by means of full scale tests on RC frames with masonry infills subjected to in-plane and out-of-plane loading. Furthermore small specimen tests were conducted to determine material characteristics of the components and the resistances of the connections. Finally, a micromodel was developed to simulate the in-plane behavior of RC frames infilled with AAC blocks with and without installation of the INODIS system. KW - earthquakes KW - in-plane and out-of-plane failure KW - INODIS KW - RC frames Y1 - 2018 U6 - http://dx.doi.org/10.1002/cepa.863 N1 - Special Issue: ICAAC ‐ 6th International Conference on Autoclaved Aerated Concrete VL - 2 IS - 4 SP - 267 EP - 273 PB - Ernst & Sohn Verlag CY - Berlin ER - TY - CHAP A1 - Dielmann, Klaus-Peter T1 - Darstellung des Erneuerbaren Energiegesetzes (EEG) und dessen Auswirkungen N2 - Erneuerbares Energien-Gesetz: Anwendungsbereich, Abnahme- und Vergütungspflicht, Vergütungssätze, Netzkosten, Ausgleichsregelungen Auswirkungen des EEG: Photovoltaik, Windkraft, Biomasse, Wasserkraft, Klär-, Deponie- und Grubengas, Geothermie Zusammenfassung und Ausblick KW - Energierecht KW - Erneuerbares Energiengesetz Y1 - 2002 ER - TY - JOUR A1 - Thielemann, Frank T1 - Das Management von Innovationen aus betriebswirtschaftlicher Sicht JF - Humanität - Wandel - Utopie / Bernd Rebe (Hrsg.). Mit Beitr. von Ute Daniel Y1 - 2000 N1 - Cloppenburger Wirtschaftsgespräche ; Bd. 9 SP - 33 EP - 64 PB - Olms CY - Hildesheim ER - TY - JOUR A1 - Schwarzer, Klemens A1 - Hafner, B. A1 - Wemhöner, C. A1 - Wenzel, T. T1 - Das Programm CARNOT zur Simulation solarthermischer Anlagen unter MATLAB-Simulink / B. Hafner ; C. Wemhöner ; T. Wenzel ; K. Schwarzer JF - Sonne - die Energie des 21. Jahrhunderts : Kurzfassungen; 5. - 7. Juli 2000 Freiburg; inklusive 11. Jahrestagung Forschungsverbund Sonnenenergie / 12. Internationales Sonnenforum. [Hrsg.: Deutsche Gesellschaft für Sonnenenergie e.V., DGS. Red.: Joachim Berner; Forschungsverbund Sonnenenergie] Y1 - 2000 SN - 3-934349-07-2 N1 - Internationales Sonnenforum <12, 2000, Freiburg, Breisgau> ; Deutsche Gesellschaft für Sonnenenergie ; Forschungsverbund Sonnenenergie SP - 181 EP - 186 PB - Solar Promotion CY - München ER - TY - CHAP A1 - Dören, Horst-Peter T1 - Das Schweißen von Austenit-Ferrit-Verbindungen T2 - Jahrbuch Schweißtechnik. 1991 Y1 - 1990 SN - 3-87155-725-0 SP - 57 EP - 63 PB - DVS-Verlag CY - Düsseldorf ER - TY - JOUR A1 - Hoffschmidt, Bernhard T1 - Das Solar-Institut Jülich an der Fachhochschule Aachen JF - Regenerative Energien in Deutschland und in Polen : Aspekte im Hinblick auf den EU-Beitritt Polens ; 6./7. Mai 2004, Lodz/Polen ; Tagungsband / VDI-Gesellschaft Energietechnik. 1. - Aufl. Y1 - 2004 SN - 3-931384-47-0 SP - 277 EP - 280 PB - VDI-Verl. CY - Düsseldorf ER - TY - BOOK A1 - Hardt, Arno T1 - Das Transportsystem BANDIT zur Messung von Halbwertszeiten kurzlebiger, neutronenarmer Isotope Y1 - 1974 N1 - Bonn, Univ., Math.-Naturwiss. Fak., Diss. PB - Univ. CY - Bonn ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Kapadi, A. A1 - Liu, B. Y. H. T1 - Data Inversion by Simplex Minimization for the Electrical Aerosol Analyzer JF - Aerosol Science and Technology. 1 (1982), H. 1982 Y1 - 1982 SN - 0278-6826 SP - 136 EP - 146 ER - TY - JOUR A1 - Förster, Arnold A1 - Darmo, J. A1 - Dubecký, F. A1 - Kordos, P. T1 - Deep-level states and electrical properties of GaAs grown at 250 °C / J. Darmo ; F. Dubecký ; P. Kordos ; A. Förster ... JF - Materials science and engineering B: Solid– state materials for advanced technology. 28 (1994), H. 1-3 Y1 - 1994 SN - 0921-5107 SP - 393 EP - 396 ER - TY - JOUR A1 - Breitbach, Gerd A1 - Schmidt-Plutka, A. A1 - Schubert, F. A1 - Nickel, H. T1 - Deformation behaviour of structures exposed at very high temperatures to cyclic thermal and mechanical loadings JF - Structural mechanics in reactor technology : transactions of the 12th International Conference on Structural Mechanics in Reactor Technology, Stuttgart, Germany, 15-20 August 1993 / ed. Karl F. Kussmaul. - Bd. L : Inelastic behaviour of solids and structures Y1 - 1993 SN - 0-444-81515-5 N1 - SMiRT <12, 1993, Stuttgart> ; L08/3 SP - 203 EP - 208 PB - Elsevier CY - Amsterdam [u.a.] ER - TY - BOOK A1 - Schwarzer, Klemens A1 - Krings, Thomas T1 - Demonstrations- und Feldtest von Solarkochern mit temporärem Speicher in Indien und Mali. - Als Ms. gedr. - (Berichte aus der Energietechnik) Y1 - 1996 SN - 3-8265-1981-7 PB - Shaker CY - Aachen ER - TY - JOUR A1 - Förster, Arnold A1 - Indlekofer, K.M. A1 - Lüth, H. T1 - Density-matrix description of a quantum dot system with variable lateral confinement in the single-electron tunneling regime. Indlekofer, K.M.; Förster, A.; Lüth, H. JF - Physica B: Condensed Matter. 314 (2002), H. 1-4 Y1 - 2002 SN - 0921-4526 SP - 499 EP - 502 ER - TY - JOUR A1 - Förster, Arnold A1 - Rose, D. A1 - Pietsch, U. A1 - Metzger, H. T1 - Depth resolved investigation of the relaxation behaviour in strained GaInAs/GaAs superlattices / Rose, D. ; Pietsch, U. ; Förster, A. ; Metzger, H.... JF - Physica B: condensed matter. 198 (1994), H. 1-3 Y1 - 1994 SN - 0921-4526 SP - 256 EP - 258 ER - TY - JOUR A1 - Förster, Arnold A1 - Rose, D. A1 - Pietsch, U. A1 - Metzger, T. H. T1 - Depth resolved investigations of the relaxation behaviour in strained GaInAs/GaAs superlattices using grazing incidence X-ray diffraction / Rose, D. ; Pietsch, U. ; Förster, A. ; Metzger, T. H. JF - Nuclear instruments and methods in physics research / Section B, Beam interactions with materials and atoms. 97 (1995), H. 1-4 Y1 - 1995 SN - 0168-583X SP - 333 EP - 336 ER - TY - CHAP A1 - Borchert, Jörg A1 - Hintze, D. ED - Zenke, Ines T1 - Der Aufbau von Handelseinheiten T2 - Energiehandel in Europa Y1 - 2009 SN - 978-3-406-58373-5 SP - 393 EP - 410 PB - Beck CY - München ET - 2. Aufl. ER - TY - JOUR A1 - Walter, G. A1 - Borchert, Jörg T1 - Der Einsatz von Realoptionen in der Elektrizitätswirtschaft JF - M & A Review Y1 - 2002 SN - 1616-0878 IS - 4 SP - 198 ER - TY - CHAP A1 - Borchert, Jörg T1 - Der Elektrizitätsmarkt in Indonesien und Beteiligungsmöglichkeiten privater Unternehmen T2 - Investitionsführer ASEAN, Indochina, 1997 : Brunei, Indonesien, Kambodscha, Laos, Malaysia, Myanmar, Philippinen, Singapur, Thailand, Vietnam Y1 - 2015 SP - 42 EP - 52 PB - Berliner Bank AG CY - Berlin ET - Stand: Mai 1997 ER - TY - JOUR A1 - Dielmann, Klaus-Peter A1 - Mehlkopf, Marcus A1 - Cudina, Boris T1 - Der Handel mit Emissionsrechten : Vorbereitung auf den europaweiten Start 2005 JF - VGB PowerTech : international journal for electricity and heat generation Y1 - 2005 SN - 1435-3199 VL - 85 IS - 1/2 SP - 66 EP - 69 ER - TY - CHAP A1 - Stangel-Meseke, Martina A1 - Hahn, Pia A1 - Steuer-Dankert, Linda T1 - Der Individualisierungs-Trend prägt die Unternehmenszukunft T2 - Diversity Management und Individualisierung N2 - Laut Zukunftsinstitut (2010) stellt die Individualisierung eine langfristige und nachhaltige Veränderung dar, die die gesamte Gesellschaft (den einzelnen Menschen, Unternehmen, den Staat) betrifft und Auswirkungen auf nahezu alle Lebensbereiche (z. B. Arbeit, Wohnen, Partnerschaft) hat. Die Individualisierung beschreibt dabei die Entwicklung hin zur Fokussierung persönlicher Interessen und Lebensentscheidungen der einzelnen Person (Kunze, Individualisierung, 2011). Der Grund für diese Entwicklung sind laut Kunze (Individualisierung, 2011) Treiber wie steigendes Vermögen, Bildung und Mobilität, was die einzelne Person unabhängiger von größeren Gemeinschaften macht und mehr Freiheit zur Selbstverwirklichung bietet. Als eine Konsequenz daraus werden Wertevorstellungen nicht mehr einfach hingenommen, sondern für die eigene Person überprüft und individualisiert (Kunze, Individualisierung, 2011). So wies Beck bereits 1996 darauf hin, dass Individualisierung meint „erstens die Auflösung und zweitens die Ablösung industriegesellschaftlicher Lebensformen durch andere, in denen die Einzelnen ihre Biographie selbst herstellen, inszenieren, zusammenflickschustern müssen“ (Beck, Die Erfindung des Politischen, 1996, S. 150). Y1 - 2015 SN - 978-3-658-07484-5 U6 - http://dx.doi.org/10.1007/978-3-658-07485-2_1 SP - 1 EP - 3 PB - Springer Gabler CY - Wiesbaden ER - TY - RPRT A1 - Butenweg, Christoph A1 - Dargel, H.-J. A1 - Höchst, T. A1 - Holtschoppen, B. A1 - Schwarz, R. A1 - Sippel, M. T1 - Der Lastfall Erdbeben im Anlagenbau : Leitfaden : Entwurf, Bemessung und Konstruktion von Tragwerken und Komponenten in der chemischen Industrie in Anlehnung an die DIN EN 1998-1 Y1 - 2012 PB - Verband der Chemischen Industrie e.V. CY - Frankfurt ER - TY - JOUR A1 - Thielemann, Frank A1 - Chalupsky, J. T1 - Der Markt verlangt nach Kooperationen JF - Leipziger Wirtschaft. 5 (1994), H. 6 Y1 - 1994 SP - 14 EP - 18 ER - TY - JOUR A1 - Breitbach, Gerd A1 - Wolters, J. T1 - Der sowjetische Druckröhren-Siedewasserreaktor / J. Wolters ; G. Breitbach JF - Atomwirtschaft - Atomtechnik. 31 (1986), H. 6 Y1 - 1986 SN - 0004-721x N1 - 2. ISSN: 0365-8414 SP - 286 EP - 289 ER - TY - JOUR A1 - Hoffstadt, Kevin A1 - Cheenakula, Dheeraja A1 - Nikolausz, Marcell A1 - Krafft, Simone A1 - Harms, Hauke A1 - Kuperjans, Isabel T1 - Design and construction of a new reactor for flexible biomethanation of hydrogen JF - Fermentation N2 - The increasing share of renewable electricity in the grid drives the need for sufficient storage capacity. Especially for seasonal storage, power-to-gas can be a promising approach. Biologically produced methane from hydrogen produced from surplus electricity can be used to substitute natural gas in the existing infrastructure. Current reactor types are not or are poorly optimized for flexible methanation. Therefore, this work proposes a new reactor type with a plug flow reactor (PFR) design. Simulations in COMSOL Multiphysics ® showed promising properties for operation in laminar flow. An experiment was conducted to support the simulation results and to determine the gas fraction of the novel reactor, which was measured to be 29%. Based on these simulations and experimental results, the reactor was constructed as a 14 m long, 50 mm diameter tube with a meandering orientation. Data processing was established, and a step experiment was performed. In addition, a kLa of 1 h−1 was determined. The results revealed that the experimental outcomes of the type of flow and gas fractions are in line with the theoretical simulation. The new design shows promising properties for flexible methanation and will be tested. KW - methanation KW - plug flow reactor KW - bubble column KW - bio-methane KW - power-to-gas Y1 - 2023 U6 - http://dx.doi.org/10.3390/fermentation9080774 SN - 2311-5637 N1 - The article belongs to the Special Issue Fermentation Processes: Modeling, Optimization and Control VL - 9 IS - 8 SP - 1 EP - 16 PB - MDPI CY - Basel ER - TY - CHAP A1 - Butenweg, Christoph A1 - Rajan, Sreelakshmy T1 - Design and construction techniques of AAC masonry buildings in earthquakes regions T2 - 10 years Xella research in Building Materials : Symposium on the 4th and 5th of September, Potsdam 2014 Y1 - 2014 ER - TY - JOUR A1 - Kürten, Sylvia A1 - Mottaghy, Darius A1 - Ziegler, Martin T1 - Design of plane energy geostructures based on laboratory tests and numerical modelling JF - Energy and Buildings Y1 - 2015 U6 - http://dx.doi.org/10.1016/j.enbuild.2015.08.039 SN - 0378-7788 VL - 107 SP - 434 EP - 444 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Hardt, Arno A1 - Abdel-Gawad, A A1 - Martin, S. A1 - Reich, J. T1 - Design procedures for the Juelich QQDDQ high resolution spectrometer T2 - Proceedings, 5th International Conference on Magnet Technology (MT-5) : Rome, Italy, April 21-25, 1975 Y1 - 1975 SP - 45 EP - 51 ER - TY - CHAP A1 - Rochefort, E. de A1 - Verver, M. A1 - Grunendahl, A. A1 - Mooi, H. A1 - Butenweg, Christoph T1 - Detailed modelling of the lumbar spine for investigation of low back pain T2 - Digital Human Modeling for Design and Engineering Symposium : Iowa City, Iowa June 14-16, 2005. (SAE technical papers series ; 2005-1-2716) Y1 - 2005 U6 - http://dx.doi.org/10.4271/2005-01-2716 SN - 0096-736X SP - 1 EP - 11 PB - SAE International CY - Warrendale, Pa. ER - TY - JOUR A1 - Rochefort, E. de A1 - Verver, M. A1 - Grunendahl, A. A1 - Mooi, H. A1 - Butenweg, Christoph T1 - Detailed modelling of the lumbar spine for investigations of low back pain JF - SAE transactions : papers presented at Society and Section meetings / Society of Automotive Engineers Y1 - 2005 SN - 0096-736X VL - Volume 114 IS - Part 7 SP - 788 EP - 796 ER - TY - JOUR A1 - Kern, Alexander A1 - Schelthoff, Christof A1 - Mathieu, Moritz T1 - Detaillierte Berechnung der Einfangwirksamkeiten von Fangeinrichtungen mit einem dynamischen elektro-geometrischen Modell - Detailed calculation of the interception efficiencies for airtermination systems using a dynamic electro-geometrical model Y1 - 2011 N1 - 9. VDE/ABB-Blitzschutztagung, Neu-Ulm 2011 SP - 1 EP - 5 ER - TY - CHAP A1 - Takenaga, Shoko A1 - Herrera, Cony F. A1 - Werner, Frederik A1 - Biselli, Manfred A1 - Schnitzler, Thomas A1 - Schöning, Michael Josef A1 - Öhlschläger, Peter A1 - Wagner, Torsten T1 - Detection of the metabolic activity of cells by differential measurements based on a single light-addressable potentiometric sensor chip T2 - 11. Dresdner Sensor-Symposium : 9.-11.12.2013 Y1 - 2013 SN - 978-3-9813484-5-3 SP - 63 EP - 67 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. T1 - Determination and Neutralization of the Charge Produced by the Dispersion of Powders JF - Journal of Aerosol Science. 18 (1987), H. 6 Y1 - 1987 SN - 0021-8502 SP - 877 EP - 880 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Thielen, H. J. T1 - Determination of Particle Size Distributions by Means of an Electrostatic Classifier / Fißan, H. J.; Helsper, C. ; Thielen, H. J. JF - Journal of Aerosol Science. 14 (1983), H. 3 Y1 - 1983 SN - 0021-8502 SP - 354 EP - 357 ER - TY - JOUR A1 - Förster, Arnold A1 - Tillmann, K. A1 - Thust, M. T1 - Determination of segregation, elastic strain and thin-foil relaxation in InxGa-1-x As islands on GaAs(001) by high resolution transmission electron microscopy / K. Tillmann ; A. Thust ; M. Lentzen ... A. Förster ... JF - Philosophical magazine / Letters. 74 (1996), H. 5 Y1 - 1996 SN - 1362-3036 SP - 309 EP - 315 ER - TY - JOUR A1 - Helsper, Christoph A1 - Wiedensohler, A. A1 - Weise, W. A1 - Lütkemeier, E. T1 - Determination of the Bipolar Charge Equilibrium in Pure Gases / Wiedensohler, A. ; Weise, W. ; Helsper, C. ; Lütkemeier, E. JF - Aerosols : formation and reactivity ; proceedings of the second International Aerosol Conference, 22-26 Sept. 1986, Berlin (West) / Gesellschaft für Aerosolforschung (GAeF) ; American Association for Aerosol Research (AAAR) Y1 - 1986 N1 - International Aerosol Conference ; (2, 1986, Berlin (West)) SP - 383 EP - 386 PB - Pergamon Press CY - Oxford [u.a.] ER - TY - JOUR A1 - Werner, Frederik A1 - Krumbe, Christoph A1 - Schumacher, Katharina A1 - Groebel, Simone A1 - Spelthahn, Heiko A1 - Stellberg, Michael A1 - Wagner, Torsten A1 - Yoshinobu, Tatsuo A1 - Selmer, Thorsten A1 - Keusgen, Michael A1 - Baumann, Marcus A1 - Schöning, Michael Josef T1 - Determination of the extracellular acidification of Escherichia coli by a light-addressable potentiometric sensor JF - Physica status solidi (a) : applications and material science. 208 (2011), H. 6 Y1 - 2011 SN - 1862-6319 SP - 1340 EP - 1344 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Arpshofen, Ingo A1 - Pool, M. J. A1 - Sommer, Ferdinand A1 - Gerling, Ulrich A1 - Predel, Bruno A1 - Schultheiss, Emil T1 - Determination of the integral mixing enthalpies in the Cu-Pd-Si liquid ternary alloy system at 1600 K JF - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 74, H. 1 Y1 - 1983 SN - 0044-3093 ; 0179-4841 SP - 25 EP - 32 ER - TY - CHAP A1 - Caminos, Ricardo Alexander Chico A1 - Schmitz, Pascal A1 - Atti, Vikrama A1 - Mahdi, Zahra A1 - Teixeira Boura, Cristiano José A1 - Sattler, Johannes Christoph A1 - Herrmann, Ulf A1 - Hilger, Patrick A1 - Dieckmann, Simon T1 - Development of a micro heliostat and optical qualification assessment with a 3D laser scanning method T2 - SOLARPACES 2020 N2 - The Solar-Institut Jülich (SIJ) and the companies Hilger GmbH and Heliokon GmbH from Germany have developed a small-scale cost-effective heliostat, called “micro heliostat”. Micro heliostats can be deployed in small-scale concentrated solar power (CSP) plants to concentrate the sun's radiation for electricity generation, space or domestic water heating or industrial process heat. In contrast to conventional heliostats, the special feature of a micro heliostat is that it consists of dozens of parallel-moving, interconnected, rotatable mirror facets. The mirror facets array is fixed inside a box-shaped module and is protected from weathering and wind forces by a transparent glass cover. The choice of the building materials for the box, tracking mechanism and mirrors is largely dependent on the selected production process and the intended application of the micro heliostat. Special attention was paid to the material of the tracking mechanism as this has a direct influence on the accuracy of the micro heliostat. The choice of materials for the mirror support structure and the tracking mechanism is made in favor of plastic molded parts. A qualification assessment method has been developed by the SIJ in which a 3D laser scanner is used in combination with a coordinate measuring machine (CMM). For the validation of this assessment method, a single mirror facet was scanned and the slope deviation was computed. KW - Concentrated solar power KW - Electricity generation KW - Measuring instruments KW - Heliostats KW - Global change Y1 - 2022 SN - 978-0-7354-4195-8 U6 - http://dx.doi.org/10.1063/5.0086262 SN - 1551-7616 (online) SN - 0094-243X (print) N1 - 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September–2 October 2020 Freiburg, Germany IS - 2445 / 1 PB - AIP conference proceedings / American Institute of Physics CY - Melville, NY ER - TY - CHAP A1 - Surtees, A. J. A1 - Gillespie, A. A1 - Kern, Alexander A1 - Rousseau, A. T1 - DEVELOPMENT OF A RISK ASSESSMENT CALCULATOR BASED ON A SIMPLIFIED FORM OF THE IEC 62305-2 STANDARD ON LIGHTNING PROTECTION N2 - Neue Blitzschutznorm IEC 62305. Entwicklung einer einfachen Software zur Risikoabwägung N2 - IEC Technical Committee 81 is currently creating the new IEC 62305 series of standards on Lightning Protection. Working Group 9 is responsible for Part 2 of this series, which deals with the assessment and management of risk its CDV (Committee Draft for Voting) stage and has been circulated to National Committees for comment. The paper details the development of the Simplified IEC Risk Assessment Calculator software tool as described in Informative Annex J of IEC62305-2 Ed.1/CDV 2. This tool is intended as a simplified implementation of the more rigorous treatment of risk management found in the written document. It is designed to be relatively intuitive for users who wish to obtain an initial assessment of risk sensitivity, but should not be considered a substitute to a full understanding of the methods provided in the standard when dealing with more complicated structures or those where greater risks to personal or system operation are involved. KW - Risiko KW - Risikoabwägung KW - Blitzrisiko KW - Blitzschutz KW - Risk KW - Risk Management KW - Risk Assessment KW - Lightning Risk KW - Lightning Protection Y1 - 2004 ER - TY - JOUR A1 - Hoffschmidt, Bernhard A1 - Fernandez, V. A1 - Konstandopoulus, A. G. T1 - Development of ceramic volumetric receiver technology JF - Forschungsbericht : DLR FB. 10 (2001) Y1 - 2001 SN - 0939-2963 N1 - 2. ISSN: 1434-8454 ; Kölner Sonnenkolloquium <5, 2001, Köln> ; Solar thermal power plants and solar chemical processes : advances and perspectives for international cooperation SP - 51 EP - 61 ER - TY - JOUR A1 - Edip, K. A1 - Sesov, V. A1 - Butenweg, Christoph A1 - Bojadjieva, J. T1 - Development of coupled numerical model for simulation of multiphase soil JF - Computers and Geotechnics N2 - In this paper, a coupled multiphase model considering both non-linearities of water retention curves and solid state modeling is proposed. The solid displacements and the pressures of both water and air phases are unknowns of the proposed model. The finite element method is used to solve the governing differential equations. The proposed method is demonstrated through simulation of seepage test and partially consolidation problem. Then, implementation of the model is done by using hypoplasticity for the solid phase and analyzing the fully saturated triaxial experiments. In integration of the constitutive law error controlling is improved and comparisons done accordingly. In this work, the advantages and limitations of the numerical model are discussed. Y1 - 2018 U6 - http://dx.doi.org/10.1016/j.compgeo.2017.08.016 SN - 0266-352X VL - 96 SP - 118 EP - 131 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Sattler, Johannes Christoph A1 - Schneider, Iesse Peer A1 - Angele, Florian A1 - Atti, Vikrama A1 - Teixeira Boura, Cristiano José A1 - Herrmann, Ulf T1 - Development of heliostat field calibration methods: Theory and experimental test results T2 - SolarPACES conference proceedings N2 - In this work, three patent pending calibration methods for heliostat fields of central receiver systems (CRS) developed by the Solar-Institut Jülich (SIJ) of the FH Aachen University of Applied Sciences are presented. The calibration methods can either operate in a combined mode or in stand-alone mode. The first calibration method, method A, foresees that a camera matrix is placed into the receiver plane where it is subjected to concentrated solar irradiance during a measurement process. The second calibration method, method B, uses an unmanned aerial vehicle (UAV) such as a quadrocopter to automatically fly into the reflected solar irradiance cross-section of one or more heliostats (two variants of method B were tested). The third calibration method, method C, foresees a stereo central camera or multiple stereo cameras installed e.g. on the solar tower whereby the orientations of the heliostats are calculated from the location detection of spherical red markers attached to the heliostats. The most accurate method is method A which has a mean accuracy of 0.17 mrad. The mean accuracy of method B variant 1 is 1.36 mrad and of variant 2 is 1.73 mrad. Method C has a mean accuracy of 15.07 mrad. For method B there is great potential regarding improving the measurement accuracy. For method C the collected data was not sufficient for determining whether or not there is potential for improving the accuracy. KW - Heliostat Field Calibration KW - Unmanned aerial vehicle KW - UAV KW - Quadrocopter KW - Camera system Y1 - 2024 U6 - http://dx.doi.org/10.52825/solarpaces.v1i.678 SN - 2751-9899 (online) N1 - 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA IS - Vol. 1 PB - TIB Open Publishing CY - Hannover ER - TY - CHAP A1 - Neumann, Hannah A1 - Adam, Mario A1 - Backes, Klaus A1 - Börner, Martin A1 - Clees, Tanja A1 - Doetsch, Christian A1 - Glaeser, Susanne A1 - Herrmann, Ulf A1 - May, Johanna A1 - Rosenthal, Florian A1 - Sauer, Dirk Uwe A1 - Stadler, Ingo T1 - Development of open educational resources for renewable energy and the energy transition process T2 - ISES SWC 2021 N2 - The dissemination of knowledge about renewable energies is understood as a social task with the highest topicality. The transfer of teaching content on renewable energies into digital open educational resources offers the opportunity to significantly accelerate the implementation of the energy transition. Thus, in the here presented project six German universities create open educational resources for the energy transition. These materials are available to the public on the internet under a free license. So far there has been no publicly accessible, editable media that cover entire learning units about renewable energies extensively and in high technical quality. Thus, in this project, the content that remains up-to-date for a longer period is appropriately prepared in terms of media didactics. The materials enable lecturers to provide students with in-depth training about technologies for the energy transition. In a particular way, the created material is also suitable for making the general public knowledgeable about the energy transition with scientifically based material. KW - energy transition KW - renewable energies KW - open educational resources KW - dissemination KW - digitalization Y1 - 2021 U6 - http://dx.doi.org/10.18086/swc.2021.47.03 N1 - ISES Solar World Congress, virtual conference 25-29 October 2021 PB - International Solar Energy Society CY - Freiburg ER - TY - CHAP A1 - Milkova, Kristina A1 - Rosin, Julia A1 - Butenweg, Christoph A1 - Dumova-Jovanoska, Elena T1 - Development of Seismic Vulnerability Curves for Region Specific Masonry Buildings T2 - 16th European Conference on Earthquake Engineering, Thessaloniki, 18-21 June, 2018 Y1 - 2018 N1 - Paper No 10522 SP - 1 EP - 10 ER - TY - CHAP A1 - Goldbach, Daniel ED - Wahl, Michael T1 - Diagnosemaßnahmen im Umfeld der Funktionalen Sicherheit T2 - AmE 2014 - Automotive meets electronics [Elektronische Ressource] : Beiträge der 5. GMM-Fachtagung vom 18. bis 19. Februar 2014 in Dortmund / Veranst.: VDE/VDI-Gesellschaft Mikroelektronik, Mikrosystem- und Feinwerktechnik (GMM) Y1 - 2014 SN - 978-3-8007-3580-8 N1 - GMM-Fachbericht ; 78 SP - 172 EP - 179 PB - VDE-Verl. CY - Berlin ER -