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 OPUS4-4483 Wissenschaftlicher Artikel Göttsche, Joachim, goettsche@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Funke, J., ; Schwarzbözl, P., First Simulation Results for the Hybridization of Small Solar Power Tower Plants Lisbon Sociedade Portuguesa De Energia Solar (SPES) 2008 7 EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings, 2008-10-07 - 2008-10-10, Lissabon (Portugal). Vol. 1 978-1-61782-228-5 Kurzfassung unter http://elib.dlr.de/56357/ 1299 1306 Solar-Institut Jülich OPUS4-5089 Wissenschaftlicher Artikel Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de Biogas systems: basics, biogas multifunction, principle of fermentation and hybrid application with a solar tower for the treatment of waste animal manure Two of the main environmental problems of today's society are the continuously increasing production of organic wastes as well as the increase of carbon dioxide in the atmosphere and the related green house effect. A way to solve these problems is the production of biogas. Biogas is a combustible gas consisting of methane, carbon dioxide and small amounts of other gases and trace elements. Production of biogas through anaerobic digestion of animal manure and slurries as well as of a wide range of digestible organic wastes and agricultural residues, converts these substrates into electricity and heat and offers a natural fertiliser for agriculture. The microbiological process of decomposition of organic matter, in the absence of oxygen takes place in reactors, called digesters. Biogas can be used as a fuel in a gas turbine or burner and can be used in a hybrid solar tower system offering a solution for waste treatment of agricultural and animal residues. A solar tower system consists of a heliostat field, which concentrates direct solar irradiation on an open volumetric central receiver. The receiver heats up ambient air to temperatures of around 700°C. The hot air's heat energy is transferred to a steam Rankine cycle in a heat recovery steam generator (HRSG). The steam drives a steam turbine, which in turn drives a generator for producing electricity. In order to increase the operational hours of a solar tower power plant, a heat storage system and/ or hybridization may be considered. The advantage of solar-fossil hybrid power plants, compared to solar-only systems, lies in low additional investment costs due to an adaptable solar share and reduced technical and economical risks. On sunny days the hybrid system operates in a solar-only mode with the central receiver and on cloudy days and at night with the gas turbine only. As an alternative to methane gas, environmentally neutral biogas can be used for operating the gas turbine. Hence, the hybrid system is operated to 100% from renewable energy sources 2012 7 Journal of Engineering Science and Technology Review 5 Special Issue on Renewable Energy Systems 4 48 55 campus http://www.jestr.org/downloads/Volume5Issue4/10.pdf Solar-Institut Jülich OPUS4-5721 Konferenzveröffentlichung Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Rau, Christoph, rau@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Breitbach, Gerd, breitbach@fh-aachen.de; Latzke, Markus, latzke@sij.fh-aachen.de Modelling and validation of a transient heat recovery steam generator of the solar tower power plant Juelich Rijeka 2012 Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012 ID 97 Solar-Institut Jülich OPUS4-5722 Konferenzveröffentlichung Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Kluczka, Sven, kluczka@sij.fh-aachen.de; Vaeßen, Christiane, vaessen@fh-aachen.de; Roeb, M., ; Neises, M., Scenario development for efficient methanol production using CO2 and solar energy Rijeka 2012 Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012 ID 99 Solar-Institut Jülich OPUS4-5724 Konferenzveröffentlichung Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de Perspektiven für Solarthermische Kraftwerke im Sonnengürtel Baf Honnef DPG 2012 12 Energiewende : Aspekte, Optionen, Herausforderungen : Vorträge auf der DPG-Frühjahrstagung Arbeitskreis Energie in der Deutschen Physikalischen Gesellschaft Berlin, 26. bis 28. März 2012 / hrsg. von Hardo Bruhns 81 93 weltweit http://www.uni-saarland.de/fak7/fze/AKE_Archiv/DPG2012-AKE_Berlin/Buch/DPG2012_AKE8.2Hoffschmidt_SolarthermischeKraftwerke_p81.pdf Solar-Institut Jülich OPUS4-5661 Konferenzveröffentlichung Breitbach, Gerd, breitbach@fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de Fluid flow in porous ceramic multichannel crossflower filter modules Burlington, Mass. COMSOL Inc. 2007 5 S. weltweit http://www.comsol.com/paper/download/98275/Breitbach.pdf Solar-Institut Jülich OPUS4-5734 Teil eines Buches Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Göttsche, Joachim, goettsche@sij.fh-aachen.de; Sauerborn, Markus, sauerborn@sij.fh-aachen.de High concentration solar collectors Solar thermal concentrated power is an emerging technology that provides clean electricity for the growing energy market. To the solar thermal concentrated power plant systems belong the parabolic trough, the Fresnel collector, the solar dish, and the central receiver system. For high-concentration solar collector systems, optical and thermal analysis is essential. There exist a number of measurement techniques and systems for the optical and thermal characterization of the efficiency of solar thermal concentrated systems. For each system, structure, components, and specific characteristics types are described. The chapter presents additionally an outline for the calculation of system performance and operation and maintenance topics. One main focus is set to the models of components and their construction details as well as different types on the market. In the later part of this chapter, different criteria for the choice of technology are analyzed in detail. Amsterdam Elsevier 2012 44 Comprehensive renewable energy / ed. Ali Sayigh. Vol. 3: Solar thermal systems: components and applications 3 978-0-08-087873-7 165 209 10.1016/B978-0-08-087872-0.00306-1 bezahl http://www.sciencedirect.com/science/article/pii/B9780080878720003061 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 OPUS4-5691 Konferenzveröffentlichung Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Breitbach, Gerd, breitbach@fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de Optimization of the channel form geometry of porous ReSiC ceramic membrane modules Meerbusch Filtech Exhibitions Germany 2009 781 S. Proceedings / International Conference & Exhibition for Filtration and Separation Technology, FILTECH 2009 : October 13 - 15, 2009, Wiesbaden, Germany. Vol. 2 978-3-941655-36-2 686 693 Solar-Institut Jülich OPUS4-5699 Konferenzveröffentlichung Fricke, Barbara, fricke@sij.fh-aachen.de; Ziolko, C., ; Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Giese, F., ; Dillig, M., InnoSol - environmental aspects of the open volumetric receiver technology Red Hook, NY Curran 2012 S. 3412 - 4265 30th ISES Biennial Solar World Congress 2011 : : Kassel, Germany, 28 August - 2 September 2011. Vol. 5 3895 3900 Solar-Institut Jülich OPUS4-5709 Konferenzveröffentlichung Fricke, Barbara, fricke@sij.fh-aachen.de; Ziolko, C., ; Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Dillig, M., ; Giese, F., InnoSol - life cycle analysis of solar power tower plants Granada 2011 1 CD-ROM SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain Solar-Institut Jülich OPUS4-5710 Konferenzveröffentlichung Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Rau, Christoph, rau@sij.fh-aachen.de Comparison of steady-state and transient simulations for solar tower power plants with open-volumetric receiver Granada 2011 1 CD-ROM SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain Solar-Institut Jülich OPUS4-5868 Konferenzveröffentlichung Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Rau, Christoph, rau@sij.fh-aachen.de; Schmitz, M., ; Schwarzbözl, P., ; Pomp, Stefan, Simulation results for a hybridized operation of a gas turbine or a burner for a small solar tower power plant 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 82 83 Solar-Institut Jülich OPUS4-6411 Bericht Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de Entwicklung der Designvoraussetzungen für ein hybrides Solarthermisches Kraftwerk : Kurztitel: HybSol ; Abschlussbericht ; Berichtszeitraum: 01.03.2007 - 31.10.2010 ; [Förderprogramm: FHprofUnt] Jülich Solar-Inst. 2011 114 S. Solar-Institut Jülich OPUS4-6396 Teil eines Buches Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de Biomass technology and bio-fuels: Heating/cooling and power Hauppauge, NY Nova Science Publ. 2013 22 Renewable energy systems : theory, innovations, and intelligent applications / eds.: Socrates Kaplanis and Eleni Kaplani 9781624177415 501 523 Solar-Institut Jülich OPUS4-6701 Wissenschaftlicher Artikel Kluczka, Sven, kluczka@sij.fh-aachen.de; Eckstein, Julian, ; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Vaeßen, Christiane, vaessen@fh-aachen.de; Roeb, Martin, Process simulation for solar steam and dry reforming In co-operation with the German Aerospace Center, the Solar-Institut Jülich has been analyzing the different technologies that are available for methanol production from CO2 using solar energy. The aim of the project is to extract CO2 from industrial exhaust gases or directly from the atmosphere to recycle it by use of solar energy. Part of the study was the modeling and simulating of a methane reformer for the production of synthesis gas, which can be operated by solar or hybrid heat sources. The reformer has been simplified in such a way that the model is accurate and enables fast calculations. The developed pseudo-homogeneous one- dimensional model can be regarded as a kind of counter-current heat exchanger and is able to incorporate a steam reforming reaction as well as a dry reforming reaction. Amsterdam Elsevier 2014 9 Energy procedia : Proceedings of the SolarPACES 2013 International Conference 49 850 859 10.1016/j.egypro.2014.03.092 weltweit https://doi.org/10.1016/j.egypro.2014.03.092 Solar-Institut Jülich OPUS4-7073 Wissenschaftlicher Artikel Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de Simulation model for the transient process behaviour of solar aluminium recycling in a rotary kiln Amsterdam Elsevier 2015 9 Applied Thermal Engineering 78 Autor im Original: Spiridon O. Alexopoulos 387 396 10.1016/j.applthermaleng.2015.01.007 campus Solar-Institut Jülich OPUS4-7933 Wissenschaftlicher Artikel Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de Advances in solar tower technology Weinheim Wiley 2017 18 Wiley interdisciplinary reviews : Energy and Environment : WIREs 6 1 1 19 10.1002/wene.217 Fachbereich Energietechnik OPUS4-9544 Konferenzveröffentlichung El Moussaoui, Noureddine, ; Kassmi, Khalil, ; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Schwarzer, Klemens, schwarzer@sij.fh-aachen.de; Chayeb, Hamid, ; Bachiri, Najib, Simulation studies on a new innovative design of a hybrid solar distiller MSDH alimented with a thermal and photovoltaic energy 2021 Materialstoday: Proceedings 10.1016/j.matpr.2021.03.115 bezahl Fachbereich Energietechnik OPUS4-9485 Wissenschaftlicher Artikel Göttsche, Joachim, goettsche@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Dümmler, Andreas, duemmler@fh-aachen.de; Maddineni, S. K., Multi-Mirror Array Calculations With Optical Error The optical performance of a 2-axis solar concentrator was simulated with the COMSOL Multiphysics® software. The concentrator consists of a mirror array, which was created using the application builder. The mirror facets are preconfigured to form a focal point. During tracking all mirrors are moved simultaneously in a coupled mode by 2 motors in two axes, in order to keep the system in focus with the moving sun. Optical errors on each reflecting surface were implemented in combination with the solar angular cone of ± 4.65 mrad. As a result, the intercept factor of solar radiation that is available to the receiver was calculated as a function of the transversal and longitudinal angles of incidence. In addition, the intensity distribution on the receiver plane was calculated as a function of the incidence angles. 2019 5 Link direkt zum PDF-Download: https://www.comsol.jp/paper/download/856481/200918_SCO4_Paper_COMSOL_jg.pdf 1 6 weltweit https://www.comsol.com/paper/multi-mirror-array-calculations-with-optical-error-95421 Fachbereich Energietechnik