Abstract
A real time executable model developed for dynamic heat analysis of a solar hydrogen reactor is described and characterized. To calculate the local distribution of radiation caused by multiple reflection inside the solar receiver the radiosity method is used. Significant optical characteristics including reflectance, transmittance and absorption are investigated related to the used materials and operating conditions. Furthermore, the influence on the model behavior is presented by variation of optical parameters. Simulation results are presented, which show good agreement with experimental data.
Zusammenfassung
Ein in Echtzeit ausführbares Modell für die dynamische Wärmeanalyse eines solaren Wasserstoffreaktors wird beschrieben und charakterisiert. Zur Berechnung der lokalen Strahlungsverteilung durch Mehrfachreflexion im Reaktor wird die Nettostrahlungsmethode verwendet. In Bezug auf die verwendeten Materialien und Betriebsbedingungen werden signifikante optische Eigenschaften wie Reflexion, Transmission und Absorption untersucht. Das Modellverhalten wird durch die Variation optischer Parameter dargestellt. Abschließend werden Simulationsergebnisse vorgestellt, welche gut mit experimentellen Daten übereinstimmen.
About the authors
Steffen Menz is scientific assistant at the University of Applied Sciences RFH in Cologne. His fields of interests are renewable energies, electrical grids, energy management, modeling and simulation of complex systems and hardware development.
Prof. Jörg Lampe is teaching at the University of Applied Sciences RFH in Cologne in the areas of simulation, mathematics and system theory. His research interests are modeling and simulation of complex dynamic systems with regards to efficiency and energy flow, as well as availability and reliability in failure analysis.
Dr. Uwe Tröltzsch is expert engineer at ITK engineering. He was teaching electrical and electronic engineering at the University of Applied Sciences RFH in Cologne. His fields of interest are modeling and simulation of technical and natural systems. These aspects he applies in the development of embedded systems including electronics and software.
Philipp Weiler has studied Mechanical Engineering at the University of Applied Sciences RFH in Cologne in the bachelor program. He worked as a research assistant in the research project ASTOR before starting his master studies in renewable energy at the Technical University of Cologne. His research interests are the physical simulation of regenerative energy systems with a focus on radiation physics.
Arne Pahl worked until September 2019 at the University of Applied Science RFH in Cologne in the laboratory for electrical energy technology. Since then he has been working at the Institute for Fundamentals of Electrical Engineering at Helmut Schmidt University Hamburg in the research field of Electromagnetic Compatibility.
Thomas Fend is Project Manager in the department of Solar Process Engineering and is involved in the development of thermochemical technologies for hydrogen production, receivers for solar thermal power plants and new methods for CO2 capture.
Since 2010 Prof. Dr.-Ing. Thomas Seeger is full Professor for Engineering Thermodynamics at the Faculty IV (Science and Technology), University of Siegen.
Acknowledgements
This work was supported by the LeitmarktAgentur.NRW within the EFRE-Project ASTOR KHH-1-001D.
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