Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Bemerkung Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Zugriffsart Link Abteilungen OPUS4-5713 Konferenzveröffentlichung Ziolko, Christoph, ; Fricke, Barbara, fricke@sij.fh-aachen.de; Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Dillig, Marius, ; Giese, Frank, ; Schwarzbözl, Peter, Ökobilanzielle Aspekte technologischer Entwicklungen des Solarturmkraftwerks Köln DLR 2011 [143] Bl. Forschung und Entwicklung für solarthermische Kraftwerke : 14. Kölner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus Jülich der FH Aachen : Kurzfassungen der Vorträge und Poster 2 S. weltweit http://www.dlr.de/sf/Portaldata/73/Resources/dokumente/Soko/Soko2011/14._Koelner_Sonnenkolloquium_KurzfassungVortraegePoster.pdf Solar-Institut Jülich OPUS4-5870 Konferenzveröffentlichung Schwarzbözl, Peter, ; Pomp, Stefan, ; Koll, Gerrit, ; Hennecke, Klaus, ; Hartz, Thomas, ; Schmitz, Mark, ; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de The solar tower Jülich - first operational experiences and test results Saint Maur Soc. OSC 2010 1 SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France 8 9 Solar-Institut Jülich OPUS4-5684 Konferenzveröffentlichung Koll, Gerrit, ; Schwarzbözl, Peter, ; Hennecke, Klaus, ; Hartz, Thomas, ; Schmitz, Mark, ; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de The Solar Tower Jülich - a research and demonstration plant for central receiver systems Stuttgart Deutsches Zentrum f. Luft- u. Raumfahrt 2009 1 CD-ROM SolarPACES 2009 : electricity, fuels and clean water powered by the sun ; 15 - 18 September 2009, Berlin, Germany ; the 15th SolarPACES conference ; proceedings 9783000287558 Solar-Institut Jülich OPUS4-4489 Wissenschaftlicher Artikel Hennecke, Klaus, ; Schwarzbözl, Peter, ; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Göttsche, Joachim, goettsche@sij.fh-aachen.de; Koll, G., ; Beuter, M., ; Hartz, T., The solar power tower Jülich - a solar thermal power plant for test and demonstration of air receiver Beijing Tsinghua Univ. Press 2007 4 Solar energy and human settlement : Elektronische Ressource : proceedings of ISES world congress 2007 ; (Vol. I - Vol. V) / [ISES Solar World Congress. ISES, International Solar Energy Society]. D. Yogi Goswami ; Yuwen Zhao 978-7-302-16146-2 Solar World Congress <2007, Beijing> ; International Solar Energy Society 1749 1753 weltweit http://elib.dlr.de/53295/1/T5.1_Klaus_Hennecke_736.pdf Solar-Institut Jülich OPUS4-5774 Teil eines Buches Koll, Gerritt, ; Schwarzbözl, Peter, ; Hennecke, Klaus, ; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Hartz, Thomas, hartz@sij.fh-aachen.de Solarthermisches Turmkraftwerk in Jülich Neuruppin Thomé-Kozmiensky Verlag 2009 5 Erneuerbare Energien. Bd. 2 : Ersatzbrennstoffe, Biomasse und Biogas, Solar- und Windenergie / Karl J. Thomé-Kozmiensky [Hrsg.] 455 460 Solar-Institut Jülich OPUS4-5686 Konferenzveröffentlichung Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Rau, Christoph, rau@sij.fh-aachen.de; Schwarzbözl, Peter, Simulation results for a hybridization concept of a small solar tower power plant Stuttgart Deutsches Zentrum f. Luft- u. Raumfahrt 2009 1 CD-ROM SolarPACES 2009 : electricity, fuels and clean water powered by the sun ; 15 - 18 September 2009, Berlin, Germany ; the 15th SolarPACES conference ; proceedings 9783000287558 Solar-Institut Jülich OPUS4-9334 Wissenschaftlicher Artikel Sattler, Johannes, Christoph, sattler@sij.fh-aachen.de; Röger, Marc, ; Schwarzbözl, Peter, ; Buck, Reiner, ; Macke, Ansgar, ; Raeder, Christian, ; Göttsche, Joachim, goettsche@sij.fh-aachen.de Review of heliostat calibration and tracking control methods Large scale central receiver systems typically deploy between thousands to more than a hundred thousand heliostats. During solar operation, each heliostat is aligned individually in such a way that the overall surface normal bisects the angle between the sun's position and the aim point coordinate on the receiver. Due to various tracking error sources, achieving accurate alignment ≤1 mrad for all the heliostats with respect to the aim points on the receiver without a calibration system can be regarded as unrealistic. Therefore, a calibration system is necessary not only to improve the aiming accuracy for achieving desired flux distributions but also to reduce or eliminate spillage. An overview of current larger-scale central receiver systems (CRS), tracking error sources and the basic requirements of an ideal calibration system is presented. Leading up to the main topic, a description of general and specific terms on the topics heliostat calibration and tracking control clarifies the terminology used in this work. Various figures illustrate the signal flows along various typical components as well as the corresponding monitoring or measuring devices that indicate or measure along the signal (or effect) chain. The numerous calibration systems are described in detail and classified in groups. Two tables allow the juxtaposition of the calibration methods for a better comparison. In an assessment, the advantages and disadvantages of individual calibration methods are presented. Amsterdam Elsevier 2020 22 Solar Energy 207 110 132 10.1016/j.solener.2020.06.030 weltweit https://doi.org/10.1016/j.solener.2020.06.030 Fachbereich Energietechnik OPUS4-11077 Konferenzveröffentlichung Schwager, Christian, ; Angele, Florian, ; Schwarzbözl, Peter, ; Teixeira Boura, Cristiano José, Boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Model predictive assistance for operational decision making in molten salt receiver systems Despite the challenges of pioneering molten salt towers (MST), it remains the leading technology in central receiver power plants today, thanks to cost effective storage integration and high cost reduction potential. The limited controllability in volatile solar conditions can cause significant losses, which are difficult to estimate without comprehensive modeling [1]. This paper presents a Methodology to generate predictions of the dynamic behavior of the receiver system as part of an operating assistance system (OAS). Based on this, it delivers proposals if and when to drain and refill the receiver during a cloudy period in order maximize the net yield and quantifies the amount of net electricity gained by this. After prior analysis with a detailed dynamic two-phase model of the entire receiver system, two different reduced modeling approaches where developed and implemented in the OAS. A tailored decision algorithm utilizes both models to deliver the desired predictions efficiently and with appropriate accuracy. Melville, NY AIP conference proceedings / American Institute of Physics 2023 8 Seiten SolarPACES: Solar Power & Chemical Energy Systems 978-0-7354-4623-6 27th International Conference on Concentrating Solar Power and Chemical Energy Systems 27 September-1 October 2021 Online 2815 / 1 10.1063/5.0151514 https://doi.org/10.1063/5.0151514 Fachbereich Energietechnik OPUS4-11066 Konferenzveröffentlichung Schwager, Christian, ; Angele, Florian, ; Nouri, Bijan, ; Schwarzbözl, Peter, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Impact of DNI forecast quality on performance prediction for a commercial scale solar tower: Application of nowcasting DNI maps to dynamic solar tower simulation Concerning current efforts to improve operational efficiency and to lower overall costs of concentrating solar power (CSP) plants with prediction-based algorithms, this study investigates the quality and uncertainty of nowcasting data regarding the implications for process predictions. DNI (direct normal irradiation) maps from an all-sky imager-based nowcasting system are applied to a dynamic prediction model coupled with ray tracing. The results underline the need for high-resolution DNI maps in order to predict net yield and receiver outlet temperature realistically. Furthermore, based on a statistical uncertainty analysis, a correlation is developed, which allows for predicting the uncertainty of the net power prediction based on the corresponding DNI forecast uncertainty. However, the study reveals significant prediction errors and the demand for further improvement in the accuracy at which local shadings are forecasted. Hannover TIB Open Publishing 2022 9 Seiten SolarPACES conference proceedings 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA Vol. 1 10.52825/solarpaces.v1i.675 https://doi.org/10.52825/solarpaces.v1i.675 Fachbereich Energietechnik OPUS4-11078 Wissenschaftlicher Artikel Schwager, Christian, ; Flesch, Robert, ; Schwarzbözl, Peter, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de Advanced two phase flow model for transient molten salt receiver system simulation In order to realistically predict and optimize the actual performance of a concentrating solar power (CSP) plant sophisticated simulation models and methods are required. This paper presents a detailed dynamic simulation model for a Molten Salt Solar Tower (MST) system, which is capable of simulating transient operation including detailed startup and shutdown procedures including drainage and refill. For appropriate representation of the transient behavior of the receiver as well as replication of local bulk and surface temperatures a discretized receiver model based on a novel homogeneous two-phase (2P) flow modelling approach is implemented in Modelica Dymola®. This allows for reasonable representation of the very different hydraulic and thermal properties of molten salt versus air as well as the transition between both. This dynamic 2P receiver model is embedded in a comprehensive one-dimensional model of a commercial scale MST system and coupled with a transient receiver flux density distribution from raytracing based heliostat field simulation. This enables for detailed process prediction with reasonable computational effort, while providing data such as local salt film and wall temperatures, realistic control behavior as well as net performance of the overall system. Besides a model description, this paper presents some results of a validation as well as the simulation of a complete startup procedure. Finally, a study on numerical simulation performance and grid dependencies is presented and discussed. Amsterdam Elsevier 2022 13 Solar Energy 232 362 375 10.1016/j.solener.2021.12.065 https://doi.org/10.1016/j.solener.2021.12.065 Fachbereich Energietechnik