@inproceedings{ZiolkoFrickeAnthrakidisetal.2011, author = {Ziolko, Christoph and Fricke, Barbara and Anthrakidis, Anette and Hoffschmidt, Bernhard and Dillig, Marius and Giese, Frank and Schwarzb{\"o}zl, Peter}, title = {{\"O}kobilanzielle Aspekte technologischer Entwicklungen des Solarturmkraftwerks}, series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, publisher = {DLR}, address = {K{\"o}ln}, pages = {2 S.}, year = {2011}, language = {de} } @inproceedings{ZiolkoSchmitzSattleretal.2010, author = {Ziolko, C. and Schmitz, M. and Sattler, Johannes, Christoph and Khedim, Ahmed and Hoffschmidt, Bernhard}, title = {AlSol - the open volumetric receiver technology moves to Africa}, series = {SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France}, booktitle = {SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France}, publisher = {Soc. OSC}, address = {Saint Maur}, pages = {93 -- 94}, year = {2010}, language = {en} } @inproceedings{ZahraPhaniSrujanCaminosetal.2022, author = {Zahra, Mahdi and Phani Srujan, Merige and Caminos, Ricardo Alexander Chico and Schmitz, Pascal and Herrmann, Ulf and Teixeira Boura, Cristiano Jos{\´e} and Schmitz, Mark and Gielen, Hans and Gedle, Yibekal and Dersch, J{\"u}rgen}, title = {Modeling the thermal behavior of solar salt in electrical resistance heaters for the application in PV-CSP hybrid power plants}, series = {SOLARPACES 2020}, booktitle = {SOLARPACES 2020}, number = {2445 / 1}, publisher = {AIP conference proceedings / American Institute of Physics}, address = {Melville, NY}, isbn = {978-0-7354-4195-8}, issn = {1551-7616 (online)}, doi = {10.1063/5.0086268}, pages = {9 Seiten}, year = {2022}, abstract = {Concentrated Solar Power (CSP) systems are able to store energy cost-effectively in their integrated thermal energy storage (TES). By intelligently combining Photovoltaics (PV) systems with CSP, a further cost reduction of solar power plants is expected, as well as an increase in dispatchability and flexibility of power generation. PV-powered Resistance Heaters (RH) can be deployed to raise the temperature of the molten salt hot storage from 385 °C up to 565 °C in a Parabolic Trough Collector (PTC) plant. To avoid freezing and decomposition of molten salt, the temperature distribution in the electrical resistance heater is investigated in the present study. For this purpose, a RH has been modeled and CFD simulations have been performed. The simulation results show that the hottest regions occur on the electric rod surface behind the last baffle. A technical optimization was performed by adjusting three parameters: Shell-baffle clearance, electric rod-baffle clearance and number of baffles. After the technical optimization was carried out, the temperature difference between the maximum temperature and the average outlet temperature of the salt is within the acceptable limits, thus critical salt decomposition has been avoided. Additionally, the CFD simulations results were analyzed and compared with results obtained with a one-dimensional model in Modelica.}, language = {en} } @article{WoliszSchuetzBlankeetal.2017, author = {Wolisz, Henryk and Sch{\"u}tz, Thomas and Blanke, Tobias and Hagenkamp, Markus and Kohrn, Markus and Wesseling, Mark and M{\"u}ller, Dirk}, title = {Cost optimal sizing of smart buildings' energy system components considering changing end-consumer electricity markets}, series = {Energy}, volume = {137}, journal = {Energy}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.energy.2017.06.025}, pages = {715 -- 728}, year = {2017}, language = {en} } @article{WemhoenerHafnerSchwarzer2000, author = {Wemh{\"o}ner, Carsten and Hafner, Bernd and Schwarzer, Klemens}, title = {Simulation of solar thermal systems with CARNOT blockset in the environment MATLAB-Simulink}, pages = {1 -- 6}, year = {2000}, language = {en} } @techreport{WeisSchornAnthrakidisetal.2016, author = {Weis, Fabian and Schorn, Christian and Anthrakidis, Anette and Herrmann, Ulf}, title = {Entwicklung eines kleinen Parabolrinnenkollektors mit Kunststoffkorpus zur Bereitstellung solarer Prozessw{\"a}rme : Poly-P : Abschlussbericht}, publisher = {Solar-Institut J{\"u}lich}, address = {J{\"u}lich}, pages = {56 Seiten}, year = {2016}, language = {de} } @inproceedings{WarerkarSchmitzGoettscheetal.2009, author = {Warerkar, Shashikant and Schmitz, Stefan and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Reißel, Martin and Tamme, Rainer}, title = {Air-sand heat exchanger for high-temperature storage}, series = {Proceedings of the ASME 3rd International Conference on Energy Sustainability : July 19 - 23, 2009, San Francisco, California, USA. Vol. 2}, booktitle = {Proceedings of the ASME 3rd International Conference on Energy Sustainability : July 19 - 23, 2009, San Francisco, California, USA. Vol. 2}, publisher = {ASME}, address = {New York, NY}, isbn = {978-0-7918-4890-6}, pages = {655 -- 661}, year = {2009}, language = {en} } @inproceedings{WarerkarSchmitzGoettscheetal.2008, author = {Warerkar, S. and Schmitz, S. and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Tamme, R.}, title = {Performance analysis of an air-sand heat exchanger prototype for high-temperature storage}, series = {EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings ; 7th - 10th October 2008, Lisbon, Portugal : key lectures / ISES, International Solar Energy Society. Vol. 1}, booktitle = {EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings ; 7th - 10th October 2008, Lisbon, Portugal : key lectures / ISES, International Solar Energy Society. Vol. 1}, publisher = {Sociedade Portuguesa De Energia Solar (SPES)}, address = {Lissabon}, isbn = {978-1-61782-228-5}, pages = {2215 -- 2222}, year = {2008}, language = {en} } @inproceedings{VossBundschuhMelissetal.1974, author = {Voß, Alfred and Bundschuh, Vinzenz and Meliß, Michael and Oesterwind, Dieter}, title = {Andere Prim{\"a}renergiequellen}, series = {Nichtkonventionelle Energiesysteme : Vortr{\"a}ge der VDI-Tagung D{\"u}sseldorf 1974. - (VDI-Bericht. 224.)}, booktitle = {Nichtkonventionelle Energiesysteme : Vortr{\"a}ge der VDI-Tagung D{\"u}sseldorf 1974. - (VDI-Bericht. 224.)}, publisher = {VDI-Verl.}, address = {D{\"u}sseldorf}, isbn = {3-18-090224-8}, pages = {117 -- 125}, year = {1974}, language = {de} } @inproceedings{vonHeesenFaber1992, author = {von Heesen, W. and Faber, Christian}, title = {Modenfilter als Schalld{\"a}mpfer f{\"u}r axiale Turbomaschinen : M{\"o}glichkeiten und Grenzen des Einsatzes}, series = {Schalltechnik '92 : L{\"a}rmminderung durch Schalld{\"a}mpfer ; Tagung B{\"o}blingen, 19. und 20. Mai 1992 / Normenausschuß Akustik, L{\"a}rmminderung und Schwingungstechnik (NALS) im DIN und VDI. VDI-Berichte. 938}, booktitle = {Schalltechnik '92 : L{\"a}rmminderung durch Schalld{\"a}mpfer ; Tagung B{\"o}blingen, 19. und 20. Mai 1992 / Normenausschuß Akustik, L{\"a}rmminderung und Schwingungstechnik (NALS) im DIN und VDI. VDI-Berichte. 938}, publisher = {VDI-Verl.}, address = {D{\"u}sseldorf}, isbn = {3-18-090938-2}, pages = {241 -- 260}, year = {1992}, language = {de} } @inproceedings{Vitting2011, author = {Vitting, Eva}, title = {Designprojekte zu Solarenergie: Wie kommunizieren wir unsere Technik?}, series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, publisher = {DLR}, address = {K{\"o}ln}, pages = {3 S.}, year = {2011}, language = {de} } @article{VieiradaSilvaSchwarzerHoffschmidtetal.2013, author = {Vieira da Silva, Maria Eugenia and Schwarzer, Klemens and Hoffschmidt, Bernhard and Pinheiro Rodrigues, Frederico and Schwarzer, Tarik and Costa Rocha, Paulo Alexandre}, title = {Mass transfer correlation for evaporation-condensation thermal process in the range of 70 °C-95 °C}, series = {Renewable energy}, volume = {Vol. 53}, journal = {Renewable energy}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-0682 (E-Journal); 0960-1481 (Print)}, pages = {174 -- 179}, year = {2013}, language = {en} } @article{VelrajSeenirajHafneretal.1999, author = {Velraj, R. and Seeniraj, R. V. and Hafner, B. and Faber, Christian and Schwarzer, Klemens}, title = {Heat transfer enhancement in a latent heat storage system}, series = {Solar energy. Vol. 65, iss. 3}, journal = {Solar energy. Vol. 65, iss. 3}, issn = {0038-092X}, pages = {171 -- 180}, year = {1999}, language = {en} } @inproceedings{VaessenAlexopoulosKluczkaetal.2011, author = {Vaeßen, Christiane and Alexopoulos, Spiros and Kluczka, Sven and Sattler, Johannes Christoph and Roeb, M. and Neises, M. and Abdellatif, T.}, title = {Analyse der Verfahren zur solaren Methanolproduktion aus CO2}, series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, publisher = {DLR}, address = {K{\"o}ln}, pages = {2 S.}, year = {2011}, language = {de} } @incollection{ThulfautGrossRenz2000, author = {Thulfaut, Christian and Groß, Rolf Fritz and Renz, Ulrich}, title = {Messwerterfassung und -auswertung mit LabView: Experimentelle Analyse der Mischungsg{\"u}te in Hybridzellenk{\"u}hlt{\"u}rmen}, series = {Virtuelle Instrumente in der Praxis. Begleitband zum Kongress VIP 2000}, booktitle = {Virtuelle Instrumente in der Praxis. Begleitband zum Kongress VIP 2000}, editor = {Jamal, Rahman and Jaschinski, Hans}, publisher = {H{\"u}thig}, address = {Heidelberg}, isbn = {3-7785-2789-4 (print)}, pages = {54 -- 60}, year = {2000}, abstract = {Zur K{\"u}hlung von Abw{\"a}rmestr{\"o}men aus Kraftwerksprozessen werden in zunehmenden Maße Hybridzellenk{\"u}hlt{\"u}rme mit Zwangskonvektion eingesetzt, deren wesentlicher Vorteil ihre geringe Bauh{\"o}he ist. Um bei derartigen K{\"u}hlt{\"u}rmen eine Sichtbehinderung oder Glatteisgef{\"a}hrdung durch bodennahen Nebel zu vermeiden, muss durch eine optimale Vermischung des Trocken- und Naßluftanteils gew{\"a}hrleistet sein, daß aus der K{\"u}hlturmkrone keine Nebelschwaden austreten. In Zusammenarbeit mit der Industrie betreibt der Lehrstuhl f{\"u}r W{\"a}rme{\"u}bertragung und Klimatechnik der RWTH Aachen einen Versuchsstand zur Erfassung der Mischungsg{\"u}te in Hybridzellenk{\"u}hlt{\"u}rmen. In maßstabsgerechter Nachbildung k{\"o}nnen dabei am Modell alle relevanten Einflußgr{\"o}ßen wie K{\"u}hlturmgeometrie, Gestaltung zus{\"a}tzlicher Mischeinbauten sowie die Betriebsparameter variiert werden. Mit Hilfe einer unter LabView 5.01 erstellten Software werden sowohl die l3etriebszust{\"u}ncle online {\"u}berwacht, als auch die ben{\"o}tigten Meßwerte zur Bestimmung der Mischungsg{\"u}te erfaßt. {\"U}ber die grafische Oberfl{\"a}che k{\"o}nnen s{\"a}mtliche Meßoptionen gesteuert sowie alle Meßdaten visualisiert und kontrolliert werden. In das LabView-Programm sind dar{\"u}ber hinaus Routinen zur Auswertung der Daten implementiert worden, die sowohl eine direkte Darstellung der Ergebnisse in Form von Diagrammen erm{\"o}glichen, als auch zur Weiterverarbeitung einen Datenexport in eine Microsoft- Excel-Tabelle vorsehen.}, language = {de} } @article{ThulfautGross2000, author = {Thulfaut, Christian and Groß, Rolf Fritz}, title = {Experimentelle Untersuchung der Luftstromvermischung in Hybridzellenk{\"u}hlt{\"u}rmen}, series = {HLH. Heizung, L{\"u}ftung/Klima, Haustechnik}, volume = {51}, journal = {HLH. Heizung, L{\"u}ftung/Klima, Haustechnik}, number = {8}, publisher = {Springer}, address = {D{\"u}sseldorf}, issn = {1436-5103}, pages = {48 -- 49}, year = {2000}, abstract = {Zwangsbel{\"u}ftete Nassk{\"u}hlt{\"u}rme haben im Gegensatz zur Trockenk{\"u}hlung bei naßkaltem Wetter Nebelschwaden zur Folge. Dagegen ist bei Naßk{\"u}hlung die spezifische K{\"u}hlleistung durch abgef{\"u}hrte Kondensationsw{\"a}rme h{\"o}her als bei der Trockenk{\"u}hlung. Hybridzellenk{\"u}hlt{\"u}rme kombinieren beide Methoden, so daß ein Mischstrom beider Abluftstr{\"o}me die Wasserdampf-S{\"a}ttigungsgrenze nicht {\"u}berschreitet. Durch das Mischungsverh{\"a}ltnis kann man den gew{\"u}nschten S{\"a}ttigungsgrad einstellen. Je dichter dieser an der S{\"a}ttigungsgrenze liegt, desto h{\"o}her ist die K{\"u}hlleistung. Der von unten zugef{\"u}hrte Luftstrom der Naßk{\"u}hlung und der seitlich zugef{\"u}hrte trockene Abluftstrom m{\"u}ssen sehr gut durchmischt werden, um {\"u}ber den gesamten Austrittsquerschnitt des K{\"u}hlturms die S{\"a}ttigungsgrenze nicht zu {\"u}berschreiten. In einem maßstabsgerechten Modell wurde der Mischungsgrad mit und ohne Einbauten untersucht. {\"U}ber ein Raster von 10 mal 10 Punkten wurde die {\"o}rtliche Temperaturverteilung ermittelt. W{\"a}rmebilanzen ergeben dann die Mischungsg{\"u}te in einer Ebene oberhalb der Zellenkrone. W{\"a}hrend ohne Mischeinbauten der Trockenluftanteil in der Mitte des Querschnitts bei unter 15 \% liegt erh{\"o}hen Einbauten den Trockenluftanteil auf 30 \% bis {\"u}ber 40 \%. Dabei wurde die Trockenluft auf jeder K{\"u}hlturmseite durch 4 konisch zulaufende, unten offene und oben geschlitzte Einbauten kanalisiert. Die Nassluft wurde durch eine im Querschnitt dreieckige Rinne in Richtung der Trockenluftausl{\"a}sse umgelenkt. Im Raster leicht zu lokalisierende Abweichungen vom gew{\"u}nschten Mittelwert zeigen Potential f{\"u}r die weitere Verbesserung der Einbauten.}, language = {de} } @inproceedings{TeixeiraBouraNiederwestbergMcLeodetal.2016, author = {Teixeira Boura, Cristiano Jos{\´e} and Niederwestberg, Stefan and McLeod, Jacqueline and Herrmann, Ulf and Hoffschmidt, Bernhard}, title = {Development of heat exchanger for high temperature energy storage with bulk materials}, series = {AIP Conference Proceedings}, volume = {1734}, booktitle = {AIP Conference Proceedings}, number = {1}, doi = {10.1063/1.4949106}, pages = {050008-1 -- 050008-7}, year = {2016}, language = {en} } @inproceedings{TeixeiraBouraEcksteinFelinksetal.2011, author = {Teixeira Boura, Cristiano Jos{\´e} and Eckstein, J. and Felinks, J. and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, S.}, title = {3-D CFD simulation of an air-sand heat exchanger}, series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, address = {Granada}, pages = {1 CD-ROM}, year = {2011}, language = {en} } @article{SteinMeliss1980, author = {Stein, H. and Meliß, Michael}, title = {Die Bedeutung der Sonnenenergie f{\"u}r die zuk{\"u}nftige Energieversorgung der Bundesrepublik Deutschland}, series = {Din-Mitteilungen + Elektronorm. Bd. 59 (1980), H. 8}, journal = {Din-Mitteilungen + Elektronorm. Bd. 59 (1980), H. 8}, issn = {0722-2912}, pages = {434 -- 440}, year = {1980}, language = {de} } @inproceedings{SpaeteWollscheidMeliss1998, author = {Sp{\"a}te, Frank and Wollscheid, Georg and Meliß, Michael}, title = {Erdreichw{\"a}rmetauscher im Solar-Campus J{\"u}lich}, series = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, booktitle = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, publisher = {Solar Promotion}, address = {M{\"u}nchen}, organization = {Deutsche Gesellschaft f{\"u}r Sonnenenergie}, pages = {591 -- 598}, year = {1998}, language = {de} } @inproceedings{SpaeteHubrichKeipetal.1998, author = {Sp{\"a}te, Frank and Hubrich, J{\"o}rg and Keip, Wolfgang and Meliß, Michael}, title = {Der Solar-Campus J{\"u}lich - Stand der Arbeiten}, series = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, booktitle = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, publisher = {Solar Promotion}, address = {M{\"u}nchen}, organization = {Deutsche Gesellschaft f{\"u}r Sonnenenergie}, pages = {666 -- 672}, year = {1998}, language = {de} } @inproceedings{SpaeteHafnerSchwarzer2000, author = {Sp{\"a}te, Frank and Hafner, B. and Schwarzer, Klemens}, title = {A system for solar process heat for decentralized applications in developing countries}, series = {ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3}, booktitle = {ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3}, publisher = {Elsevier}, address = {Oxford}, isbn = {0-080-043895-4}, pages = {236 -- 291}, year = {2000}, language = {en} } @article{SchwarzerWollscheidMeliss1996, author = {Schwarzer, Klemens and Wollscheid, G. and Meliß, Michael}, title = {Vermessung, Bewertung und Optimierung von thermischen Solaranlagen f{\"u}r Einfamilienh{\"a}user / G. Wollscheid ; M. Meliß ; K. Schwarzer}, series = {Sechstes Symposium Thermische Solarenergie : Kloster Banz ; [Termin: 08. - 10. Mai 1996] / OTTI-Technologie-Kolleg. Fachliche Gesamtltg.: J{\"u}rgen Schmid]}, journal = {Sechstes Symposium Thermische Solarenergie : Kloster Banz ; [Termin: 08. - 10. Mai 1996] / OTTI-Technologie-Kolleg. Fachliche Gesamtltg.: J{\"u}rgen Schmid]}, publisher = {OTTI}, address = {Regensburg}, pages = {335 -- 339}, year = {1996}, language = {de} } @inproceedings{SchwarzerWiedenfeldBansaletal.1991, author = {Schwarzer, Klemens and Wiedenfeld, M. and Bansal, Narenda K. and Ertl, Karl-Heinz}, title = {A novel solar sterilization and water destillation system : experiment and thermodynamic analysis}, series = {1991 Solar World Congress : : proceedings of the Biennial Congress of the International Solar Energy Society, Denver, Colorado, USA, 19 - 23 August 1991 / ed. by M. E. Arden. Bd. 2,II}, booktitle = {1991 Solar World Congress : : proceedings of the Biennial Congress of the International Solar Energy Society, Denver, Colorado, USA, 19 - 23 August 1991 / ed. by M. E. Arden. Bd. 2,II}, publisher = {Pergamon Pr.}, address = {Oxford}, isbn = {0-08-041690-x}, pages = {2276 -- 2281}, year = {1991}, language = {en} } @inproceedings{SchwarzerVieiraMuelleretal.2003, author = {Schwarzer, Klemens and Vieira, Maria Eugenia and M{\"u}ller, Christoph and Lehmann, Harry and Coutinho, Lecimara}, title = {Modular solar thermal desalination system with flat plate collector}, series = {RIO 3 - World Climate \& Energy Event : proceedings of the international conference held in Rio de Janeiro, Brazil, 1 -5 december 2003 / chief-ed.: Stefan Krauter ...}, booktitle = {RIO 3 - World Climate \& Energy Event : proceedings of the international conference held in Rio de Janeiro, Brazil, 1 -5 december 2003 / chief-ed.: Stefan Krauter ...}, publisher = {Krauter}, address = {Rio de Janeiro}, isbn = {85-902710-2-1}, pages = {281 -- 286}, year = {2003}, language = {en} } @article{SchwarzerVieiradaSilvaSchwarzer2011, author = {Schwarzer, Klemens and Vieira da Silva, Maria Eugenia and Schwarzer, Tarik}, title = {Field results in Namibia and Brazil of the new solar desalination system for decentralised drinking water production}, series = {Desalination and water treatment. Vol. 31 (2011), iss. 1-3: selected papers presented at EuroMed 2010 — Desalination for Clean Water and Energy: Cooperation among Mediterranean Countries of Europe and MENA Region, 3-7 October 2010, Tel Aviv, Israel}, journal = {Desalination and water treatment. Vol. 31 (2011), iss. 1-3: selected papers presented at EuroMed 2010 — Desalination for Clean Water and Energy: Cooperation among Mediterranean Countries of Europe and MENA Region, 3-7 October 2010, Tel Aviv, Israel}, pages = {379 -- 386}, year = {2011}, language = {en} } @inproceedings{SchwarzerSchwarzer2009, author = {Schwarzer, Klemens and Schwarzer, Tarik}, title = {Stand und Entwicklung der Meerwasserentsalzung}, series = {Neue Herausforderungen und Chancen in der Wasserversorgung : Seminar des Fachgebiets Wasserversorgung und Grundwasserschutz im Rahmen des 1. Darmst{\"a}dter Ingenieurkongresses Bau und Umwelt am 14. und 15.09.2009. Schriftenreihe WAR. 205}, booktitle = {Neue Herausforderungen und Chancen in der Wasserversorgung : Seminar des Fachgebiets Wasserversorgung und Grundwasserschutz im Rahmen des 1. Darmst{\"a}dter Ingenieurkongresses Bau und Umwelt am 14. und 15.09.2009. Schriftenreihe WAR. 205}, publisher = {Inst. WAR}, address = {Darmstadt}, isbn = {978-3-940897-01-5}, pages = {99 -- 120}, year = {2009}, language = {de} } @inproceedings{SchwarzerKrokerRusack2008, author = {Schwarzer, Klemens and Kroker, Jan and Rusack, Markus}, title = {Technical improvement of a small modular parabolic trough collector}, series = {EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings ; 7th - 10th October 2008, Lisbon, Portugal : key lectures / ISES, International Solar Energy Society. Vol. 1}, booktitle = {EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings ; 7th - 10th October 2008, Lisbon, Portugal : key lectures / ISES, International Solar Energy Society. Vol. 1}, publisher = {Sociedade Portuguesa De Energia Solar (SPES)}, address = {Lissabon}, isbn = {978-1-61782-228-5}, pages = {1395 -- 1402}, year = {2008}, language = {en} } @inproceedings{SchwarzerKringsFaberetal.1998, author = {Schwarzer, Klemens and Krings, T. and Faber, Christian and Hafner, B.}, title = {Erfahrungen mit Solarkochern verschiedener Gr{\"o}ße f{\"u}r Familien und Institutionen}, series = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, booktitle = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, publisher = {Solar Promotion}, address = {M{\"u}nchen}, organization = {Deutsche Gesellschaft f{\"u}r Sonnenenergie}, pages = {801 -- 809}, year = {1998}, language = {de} } @techreport{SchwarzerHoeller1998, author = {Schwarzer, Klemens and H{\"o}ller, Robert}, title = {EOS Ertragsverbesserung und Optimierung von Energie Systemen. Abschlussbericht BMBF 1700796}, pages = {35 S.}, year = {1998}, language = {de} } @techreport{SchwarzerHafner1999, author = {Schwarzer, Klemens and Hafner, Bernd}, title = {Aufbau und Erprobung eines Latentw{\"a}rmespeichers f{\"u}r den Einsatz in Raumheizungssystemen. Abschlussbericht BMBF 1700297}, pages = {64 S.}, year = {1999}, language = {de} } @inproceedings{SchwarzerHafnerMeeretal.1993, author = {Schwarzer, Klemens and Hafner, B. and Meer, A. von and Krings, T.}, title = {Simulation and dimensioning program for solar cookers with temporal heat storage and comparison with measurements}, series = {Harmony with nature : : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Bd 5: Active systems}, booktitle = {Harmony with nature : : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Bd 5: Active systems}, publisher = {Hungarian Energy Society}, address = {Budapest}, pages = {473 -- 478}, year = {1993}, language = {en} } @techreport{SchwarzerGoettscheJellinghaus2006, author = {Schwarzer, Klemens and G{\"o}ttsche, Joachim and Jellinghaus, Sabine}, title = {Farblichtstudie : Beleuchtung mit gesteuertem Farblicht - Untersuchung und Optimierung von Systemen zur Farblichtsteuerung : Abschlussbericht M{\"a}rz 2006}, pages = {39 S.}, year = {2006}, language = {de} } @inproceedings{SchwarzerFaberMelissetal.1993, author = {Schwarzer, Klemens and Faber, Christian and Meliß, Michael and Sp{\"a}te, F.}, title = {Solar-Institut J{\"u}lich (SIJ), Fachhochschule Aachen, Division J{\"u}lich Germany}, series = {Harmony with nature : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 1: Energy policy, environment, education}, booktitle = {Harmony with nature : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 1: Energy policy, environment, education}, publisher = {Hungarian Energy Society}, address = {Budapest}, pages = {349 -- 354}, year = {1993}, language = {en} } @inproceedings{SchwarzerBiegerRickingetal.1991, author = {Schwarzer, Klemens and Bieger, W. and Ricking, N. and Bansal, Narenda K.}, title = {Solar cooker with a rock bed cum oil storage}, series = {1991 Solar World Congress : : proceedings of the Biennial Congress of the International Solar Energy Society, Denver, Colorado, USA, 19 - 23 August 1991 / ed. by M. E. Arden. Bd. 3,II}, booktitle = {1991 Solar World Congress : : proceedings of the Biennial Congress of the International Solar Energy Society, Denver, Colorado, USA, 19 - 23 August 1991 / ed. by M. E. Arden. Bd. 3,II}, publisher = {Pergamon Pr.}, address = {Oxford}, isbn = {0-08-041690-x}, pages = {3751 -- 3756}, year = {1991}, language = {en} } @inproceedings{SchwarzerBiegerRicking1990, author = {Schwarzer, Klemens and Bieger, W. and Ricking, N.}, title = {Entwicklung und Erprobung eines solaren Kochers mit tempor{\"a}rem Speicher}, series = {Rationelle Energieverwendung und Nutzung erneuerbarer Energiequellen im regionalen und kommunalen Bereich : : welchen Beitrag k{\"o}nnen sie zur Abwehr der Klimabedrohung leisten?; Frankfurt, 9. - 12. Oktober 1990; [Tagungsbericht] / 7. Internationales Sonnenforum. [Veranst.: Deutsche Gesellschaft f{\"u}r Sonnenenergie e.V., Deutsche Sektion der ISES. Red.: A. Hohmann; H. H. Hohmann]. Bd. 2.}, booktitle = {Rationelle Energieverwendung und Nutzung erneuerbarer Energiequellen im regionalen und kommunalen Bereich : : welchen Beitrag k{\"o}nnen sie zur Abwehr der Klimabedrohung leisten?; Frankfurt, 9. - 12. Oktober 1990; [Tagungsbericht] / 7. Internationales Sonnenforum. [Veranst.: Deutsche Gesellschaft f{\"u}r Sonnenenergie e.V., Deutsche Sektion der ISES. Red.: A. Hohmann; H. H. Hohmann]. Bd. 2.}, publisher = {DGS-Sonnenenergie-Verl.}, address = {M{\"u}nchen}, pages = {1002 -- 1007}, year = {1990}, language = {de} } @inproceedings{Schwarzer1992, author = {Schwarzer, Klemens}, title = {A new kind of efficient solar cookers with and without temporary heat storage}, series = {Advances in solar cooking : proceedings of the First World Conference on Solar Cooking, Stockton, California, USA, June 19 - 20, 1992 / ed. by Edwin Pejack}, booktitle = {Advances in solar cooking : proceedings of the First World Conference on Solar Cooking, Stockton, California, USA, June 19 - 20, 1992 / ed. by Edwin Pejack}, publisher = {Solar Box Cookers International}, address = {Sacramento, Calif.}, pages = {107 -- 112}, year = {1992}, language = {en} } @inproceedings{Schwarzer2006, author = {Schwarzer, Klemens}, title = {Solarthermisches Entsalzungssystem mit W{\"a}rmer{\"u}ckgewinnung - Erste Feldtestergebnisse}, series = {16. Symposium Thermische Solarenergie : 17. bis 19. Mai 2006, Kloster Banz, Bad Staffelstein}, booktitle = {16. Symposium Thermische Solarenergie : 17. bis 19. Mai 2006, Kloster Banz, Bad Staffelstein}, publisher = {Ostbayer. Technologie-Transfer-Inst.}, address = {Regensburg}, isbn = {3-934681-45-X}, pages = {173 -- 178}, year = {2006}, language = {de} } @inproceedings{Schwarzer2008, author = {Schwarzer, Klemens}, title = {Desalination systems with renewable energies}, series = {DME Seminar Desalination and Renewable Energies : June 19 and 20 2008, Solar Institut J{\"u}lich / Deutsche Meerwasserentsalzung e.V.}, booktitle = {DME Seminar Desalination and Renewable Energies : June 19 and 20 2008, Solar Institut J{\"u}lich / Deutsche Meerwasserentsalzung e.V.}, publisher = {DME}, address = {Duisburg}, isbn = {978-3-86861-017-8}, pages = {219 Bl. in getr. Z{\"a}hlung : zahlr. Ill. und graph. Darst., Kt.}, year = {2008}, language = {en} } @inproceedings{SchwarzboezlPompKolletal.2010, author = {Schwarzb{\"o}zl, Peter and Pomp, Stefan and Koll, Gerrit and Hennecke, Klaus and Hartz, Thomas and Schmitz, Mark and Hoffschmidt, Bernhard}, title = {The solar tower J{\"u}lich - first operational experiences and test results}, series = {SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France}, booktitle = {SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France}, publisher = {Soc. OSC}, address = {Saint Maur}, pages = {8 -- 9}, year = {2010}, language = {en} } @inproceedings{SchwagerTeixeiraBouraFleschetal.2019, author = {Schwager, Christian and Teixeira Boura, Cristiano Jos{\´e} and Flesch, Robert and Alexopoulos, Spiros and Herrmann, Ulf}, title = {Improved efficiency prediction of a molten salt receiver based on dynamic cloud passage simulation}, series = {AIP Conference Proceedings}, volume = {2126}, booktitle = {AIP Conference Proceedings}, number = {1}, isbn = {978-0-7354-1866-0}, doi = {10.1063/1.5117566}, pages = {030054-1 -- 030054-8}, year = {2019}, language = {en} } @article{SchwagerFleschSchwarzboezletal.2022, author = {Schwager, Christian and Flesch, Robert and Schwarzb{\"o}zl, Peter and Herrmann, Ulf and Teixeira Boura, Cristiano Jos{\´e}}, title = {Advanced two phase flow model for transient molten salt receiver system simulation}, series = {Solar Energy}, volume = {232}, journal = {Solar Energy}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0038-092X (print)}, doi = {10.1016/j.solener.2021.12.065}, pages = {362 -- 375}, year = {2022}, abstract = {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.}, language = {en} } @inproceedings{SchwagerAngeleSchwarzboezletal.2023, author = {Schwager, Christian and Angele, Florian and Schwarzb{\"o}zl, Peter and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Model predictive assistance for operational decision making in molten salt receiver systems}, series = {SolarPACES: Solar Power \& Chemical Energy Systems}, booktitle = {SolarPACES: Solar Power \& Chemical Energy Systems}, number = {2815 / 1}, publisher = {AIP conference proceedings / American Institute of Physics}, address = {Melville, NY}, isbn = {978-0-7354-4623-6}, issn = {1551-7616 (online)}, doi = {10.1063/5.0151514}, pages = {8 Seiten}, year = {2023}, abstract = {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.}, language = {en} } @inproceedings{SchwagerAngeleNourietal.2022, author = {Schwager, Christian and Angele, Florian and Nouri, Bijan and Schwarzb{\"o}zl, Peter and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Impact of DNI forecast quality on performance prediction for a commercial scale solar tower: Application of nowcasting DNI maps to dynamic solar tower simulation}, series = {SolarPACES conference proceedings}, booktitle = {SolarPACES conference proceedings}, number = {Vol. 1}, publisher = {TIB Open Publishing}, address = {Hannover}, issn = {2751-9899 (online)}, doi = {10.52825/solarpaces.v1i.675}, pages = {9 Seiten}, year = {2022}, abstract = {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.}, language = {en} } @incollection{SchumacherSchwarzerStukenbrocketal.2009, author = {Schumacher, Werner and Schwarzer, Klemens and Stukenbrock, Philipp and Rodriguez, Nadia}, title = {Entwicklung und Anwendungsgebiete solarthermischer Kraftwerke - Betriebsweise und Systemvarianten}, series = {Erneuerbare Energien. Bd. 2 : Ersatzbrennstoffe, Biomasse und Biogas, Solar- und Windenergie / Karl J. Thom{\´e}-Kozmiensky [Hrsg.]}, booktitle = {Erneuerbare Energien. Bd. 2 : Ersatzbrennstoffe, Biomasse und Biogas, Solar- und Windenergie / Karl J. Thom{\´e}-Kozmiensky [Hrsg.]}, publisher = {Thom{\´e}-Kozmiensky Verlag}, address = {Neuruppin}, isbn = {978-3-935317-43-6}, pages = {401 -- 434}, year = {2009}, language = {de} } @inproceedings{SchulzeBuxlohGrossUlbrich2021, author = {Schulze-Buxloh, Lina and Groß, Rolf Fritz and Ulbrich, Michelle}, title = {Digital planning using building information modelling and virtual reality: new approach for students' remote practical training under lockdown conditions in the course of smart building engineering}, series = {Proceedings of International Conference on Education in Mathematics, Science and Technology 2021}, booktitle = {Proceedings of International Conference on Education in Mathematics, Science and Technology 2021}, publisher = {ISTES Organization}, address = {San Antonio, TX}, isbn = {978-1-952092-17-6}, pages = {118 -- 123}, year = {2021}, abstract = {The worldwide Corona pandemic has severely restricted student projects in the higher semesters of engineering courses. In order not to delay the graduation, a new concept had to be developed for projects under lockdown conditions. Therefore, unused rooms at the university should be digitally recorded in order to develop a new usage concept as laboratory rooms. An inventory of the actual state of the rooms was done first by taking photos and listing up all flaws and peculiarities. After that, a digital site measuring was done with a 360° laser scanner and these recorded scans were linked to a coherent point cloud and transferred to a software for planning technical building services and supporting Building Information Modelling (BIM). In order to better illustrate the difference between the actual and target state, two virtual reality models were created for realistic demonstration. During the project, the students had to go through the entire digital planning phases. Technical specifications had to be complied with, as well as documentation, time planning and cost estimate. This project turned out to be an excellent alternative to on-site practical training under lockdown conditions and increased the students' motivation to deal with complex technical questions.}, language = {en} } @inproceedings{SchulzeBuxlohGross2021, author = {Schulze-Buxloh, Lina and Groß, Rolf Fritz}, title = {Miniature urban farming plant: a complex educational "Toy" for engineering students}, series = {The Future of Education 11th Edition 2021}, booktitle = {The Future of Education 11th Edition 2021}, pages = {4 Seiten}, year = {2021}, abstract = {Urban farming is an innovative and sustainable way of food production and is becoming more and more important in smart city and quarter concepts. It also enables the production of certain foods in places where they usually dare not produced, such as production of fish or shrimps in large cities far away from the coast. Unfortunately, it is not always possible to show students such concepts and systems in real life as part of courses: visits of such industry plants are sometimes not possible because of distance or are permitted by the operator for hygienic reasons. In order to give the students the opportunity of getting into contact with such an urban farming system and its complex operation, an industrial urban farming plant was set up on a significantly smaller scale. Therefore, all needed technical components like water aeriation, biological and mechanical filtration or water circulation have been replaced either by aquarium components or by self-designed parts also using a 3D-printer. Students from different courses like mechanical engineering, smart building engineering, biology, electrical engineering, automation technology and civil engineering were involved in this project. This "miniature industrial plant" was also able to start operation and has now been running for two years successfully. Due to Corona pandemic, home office and remote online lectures, the automation of this miniature plant should be brought to a higher level in future for providing a good control over the system and water quality remotely. The aim of giving the student a chance to get to know the operation of an urban farming plant was very well achieved and the students had lots of fun in "playing" and learning with it in a realistic way.}, language = {en} } @inproceedings{SchulzeBuxlohGross2021, author = {Schulze-Buxloh, Lina and Groß, Rolf Fritz}, title = {Interdisciplinary Course Smart Building Engineering: A new approach of teaching freshmen in remote teamwork project under pandemic restrictions}, series = {New Perspectives in Science Education -International Conference (virtual event, 18-19 March 2021)}, booktitle = {New Perspectives in Science Education -International Conference (virtual event, 18-19 March 2021)}, publisher = {Filodiritto}, address = {Bologna}, pages = {4 Seiten}, year = {2021}, abstract = {In the context of the Corona pandemic and its impact on teaching like digital lectures and exercises a new concept especially for freshmen in demanding courses of Smart Building Engineering became necessary. As there were hardly any face-to-face events at the university, the new teaching concept should enable a good start into engineering studies under pandemic conditions anyway and should also replace the written exam at the end. The students should become active themselves in small teams instead of listening passively to a lecture broadcast online with almost no personal contact. For this purpose, a role play was developed in which the freshmen had to work out a complete solution to the realistic problem of designing, construction planning and implementing a small guesthouse. Each student of the team had to take a certain role like architect, site manager, BIM-manager, electrician and the technitian for HVAC installations. Technical specifications must be complied with, as well as documentation, time planning and cost estimate. The final project folder had to contain technical documents like circuit diagrams for electrical components, circuit diagrams for water and heating, design calculations and components lists. On the other hand construction schedule, construction implementation plan, documentation of the construction progress and minutes of meetings between the various trades had to be submitted as well. In addition to the project folder, a model of the construction project must also be created either as a handmade model or as a digital 3D-model using Computer-aided design (CAD) software. The first steps in the field of Building information modelling (BIM) had also been taken by creating a digital model of the building showing the current planning status in real time as a digital twin. This project turned out to be an excellent training of important student competencies like teamwork, communication skills, and self -organisation and also increased motivation to work on complex technical questions. The aim of giving the student a first impression on the challenges and solutions in building projects with many different technical trades and their points of view was very well achieved and should be continued in the future.}, language = {en} } @inproceedings{SchulteFischedickTammeHerrmann2009, author = {Schulte-Fischedick, Jan and Tamme, Rainer and Herrmann, Ulf}, title = {CFD Analysis of the Cool Down Behaviour of Molten Salt Thermal Storage Systems}, series = {ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences, ASME 2008 2nd International Conference on Energy Sustainability, Jacksonville, Florida, USA, August 10-14, 2008. - Vol. 2}, booktitle = {ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences, ASME 2008 2nd International Conference on Energy Sustainability, Jacksonville, Florida, USA, August 10-14, 2008. - Vol. 2}, publisher = {ASME}, address = {New York, NY}, isbn = {978-0-7918-4320-8}, doi = {doi:10.1115/ES2008-54101}, pages = {515 -- 524}, year = {2009}, language = {de} } @inproceedings{SchulteSchwagerNoureldinetal.2023, author = {Schulte, Jonas and Schwager, Christian and Noureldin, Kareem and May, Martin and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Gradient controlled startup procedure of a molten-salt power-to-heat energy storage plant based on dynamic process simulation}, series = {SolarPACES: Solar Power \& Chemical Energy Systems}, booktitle = {SolarPACES: Solar Power \& Chemical Energy Systems}, number = {2815 / 1}, publisher = {AIP conference proceedings / American Institute of Physics}, address = {Melville, NY}, isbn = {978-0-7354-4623-6}, issn = {1551-7616 (online)}, doi = {10.1063/5.0148741}, pages = {9 Seiten}, year = {2023}, abstract = {The integration of high temperature thermal energy storages into existing conventional power plants can help to reduce the CO2 emissions of those plants and lead to lower capital expenditures for building energy storage systems, due to the use of synergy effects [1]. One possibility to implement that, is a molten salt storage system with a powerful power-to-heat unit. This paper presents two possible control concepts for the startup of the charging system of such a facility. The procedures are implemented in a detailed dynamic process model. The performance and safety regarding the film temperatures at heat transmitting surfaces are investigated in the process simulations. To improve the accuracy in predicting the film temperatures, CFD simulations of the electrical heater are carried out and the results are merged with the dynamic model. The results show that both investigated control concepts are safe regarding the temperature limits. The gradient controlled startup performed better than the temperature-controlled startup. Nevertheless, there are several uncertainties that need to be investigated further.}, language = {en} } @inproceedings{SchulteSchwagerFrantzetal.2022, author = {Schulte, Jonas and Schwager, Christian and Frantz, Cathy and Schloms, Felix and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Control concept for a molten salt receiver in star design: Development, optimization and testing with cloud passage scenarios}, series = {SolarPACES conference proceedings}, booktitle = {SolarPACES conference proceedings}, number = {Vol. 1}, publisher = {TIB Open Publishing}, address = {Hannover}, issn = {2751-9899 (online)}, doi = {10.52825/solarpaces.v1i.693}, pages = {9 Seiten}, year = {2022}, abstract = {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.}, language = {en} } @article{SchossigDoetschDruecketal.2005, author = {Schossig, Peter and D{\"o}tsch, Christian and Dr{\"u}ck, Harald and G{\"o}ttsche, Joachim and Huenges, Ernst and Kabus, Frank and Tamme, Rainer}, title = {W{\"a}rmespeicher f{\"u}r die Hausenergieversorgung}, series = {W{\"a}rme und K{\"a}lte - Energie aus Sonne und Erde : Jahrestagung des Forschungsverbunds Sonnenenergie in Kooperation mit der Landesinitiative Zukunftsenergie NRW / Stadermann, Gerd, Hrsg.}, journal = {W{\"a}rme und K{\"a}lte - Energie aus Sonne und Erde : Jahrestagung des Forschungsverbunds Sonnenenergie in Kooperation mit der Landesinitiative Zukunftsenergie NRW / Stadermann, Gerd, Hrsg.}, publisher = {Forschungsverbund Sonnenenergie}, address = {Berlin}, pages = {120 -- 125}, year = {2005}, language = {de} } @inproceedings{SchornWeisAnthrakidisetal.2016, author = {Schorn, Christian and Weis, Fabian and Anthrakidis, Anette and Schwarzer, Klemens and Schmitz, Mark and Herrmann, Ulf}, title = {Entwicklung und Bewertung eines Parabolrinnenkollektors zur Prozessw{\"a}rmebereitstellung}, series = {26. Symposium Thermische Solarenergie, 20.-22.04.2016 in Bad Staffelstein}, booktitle = {26. Symposium Thermische Solarenergie, 20.-22.04.2016 in Bad Staffelstein}, pages = {1 -- 13}, year = {2016}, language = {de} } @book{SchmitzGoettscheHoffschmidt2009, author = {Schmitz, Stefan and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard}, title = {Entwicklung von Mikrospiegelsystemen f{\"u}r solarthermische Kraftwerke (Mikrohelix) [Elektronische Ressource] : Abschlussbericht ; Berichtszeitraum: 01.07.2006 - 30.06.2009}, publisher = {FH Aachen, Campus J{\"u}lich, Solar-Inst. [u.a.]}, address = {J{\"u}lich}, pages = {Online-Ressource (81 S., 2,83 MB) : Ill., graph. D}, year = {2009}, language = {de} } @inproceedings{SauerbornLiebenstundRaueetal.2017, author = {Sauerborn, Markus and Liebenstund, Lena and Raue, Markus and Mang, Thomas and Herrmann, Ulf and Dueing, Andreas}, title = {Analytic method for material aging and quality analyzing to forecast long time stability of plastic micro heliostat components}, series = {AIP Conference Proceedings}, volume = {1850}, booktitle = {AIP Conference Proceedings}, number = {1}, doi = {10.1063/1.4984388}, pages = {030045-1 -- 030045-8}, year = {2017}, language = {en} } @inproceedings{SauerbornKlimekHoffschmidtetal.2012, author = {Sauerborn, Markus and Klimek, J. and Hoffschmidt, Bernhard and Essen, H. and Sieger, S. and Biegel, G. and G{\"o}ttsche, Joachim and Hilger, Patrick}, title = {Eurosun 2012 : radar technology for heliostat posititon control}, series = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012}, booktitle = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012}, address = {Rijeka}, pages = {ID 80}, year = {2012}, language = {en} } @inproceedings{SauerbornHoffschmidtTelleetal.2012, author = {Sauerborn, Markus and Hoffschmidt, Bernhard and Telle, R. and Wagner, M.}, title = {Heatable optical analyse system for high temperature absorbers}, series = {30th ISES Biennial Solar World Congress 2011 : : Kassel, Germany, 28 August - 2 September 2011. Vol. 5}, booktitle = {30th ISES Biennial Solar World Congress 2011 : : Kassel, Germany, 28 August - 2 September 2011. Vol. 5}, publisher = {Curran}, address = {Red Hook, NY}, organization = {International Solar Energy Society}, isbn = {978-1-61839-364-7}, pages = {3852 -- 3860}, year = {2012}, language = {en} } @inproceedings{SauerbornHoffschmidtGoettscheetal.2009, author = {Sauerborn, Markus and Hoffschmidt, Bernhard and G{\"o}ttsche, Joachim and Schmitz, S. and Rebholz, C. and Ansorge, F. and Ifland, D.}, title = {Mini-Spiegel-Array f{\"u}r solarthermische Kraftwerke : [Vortragsfolien]}, series = {DPG-Fr{\"u}hjahrstagung, Arbeitskreis Energie, Hamburg 03.03.2009}, booktitle = {DPG-Fr{\"u}hjahrstagung, Arbeitskreis Energie, Hamburg 03.03.2009}, pages = {1 -- 10}, year = {2009}, language = {de} } @inproceedings{SauerbornArshadiRohrmoser2012, author = {Sauerborn, Markus and Arshadi, S. and Rohrmoser, R.}, title = {Influence of clouds and aerosols to the haze of the sunshape}, series = {30th ISES Biennial Solar World Congress 2011 : Kassel, Germany, 28 August - 2 September 2011. Vol. 5}, booktitle = {30th ISES Biennial Solar World Congress 2011 : Kassel, Germany, 28 August - 2 September 2011. Vol. 5}, publisher = {Curran}, address = {Red Hook, NY}, organization = {International Solar Energy Society}, pages = {3887 -- 3894}, year = {2012}, language = {en} } @inproceedings{Sauerborn2011, author = {Sauerborn, Markus}, title = {Investigations to the influence of clouds and aerosols to the haze of the sunshape}, series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, address = {Granada}, pages = {1 CD-ROM}, year = {2011}, language = {en} } @article{SattlerRoegerSchwarzboezletal.2020, author = {Sattler, Johannes, Christoph and R{\"o}ger, Marc and Schwarzb{\"o}zl, Peter and Buck, Reiner and Macke, Ansgar and Raeder, Christian and G{\"o}ttsche, Joachim}, title = {Review of heliostat calibration and tracking control methods}, series = {Solar Energy}, volume = {207}, journal = {Solar Energy}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.solener.2020.06.030}, pages = {110 -- 132}, year = {2020}, abstract = {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.}, language = {en} } @inproceedings{SattlerCaminosUerlingsetal.2020, author = {Sattler, Johannes, Christoph and Caminos, Ricardo Alexander Chico and {\"U}rlings, Nicolas and Dutta, Siddharth and Ruiz, Victor and Kalogirou, Soteris and Ktistis, Panayiotis and Agathokleous, Rafaela and Jung, Christian and Alexopoulos, Spiros and Atti, Vikrama Nagababu and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Operational experience and behaviour of a parabolic trough collector system with concrete thermal energy storage for process steam generation in Cyprus}, series = {AIP Conference Proceedings}, booktitle = {AIP Conference Proceedings}, number = {2303}, doi = {10.1063/5.0029278}, pages = {140004-1 -- 140004-10}, year = {2020}, language = {en} } @inproceedings{SattlerAlexopoulosCaminosetal.2019, author = {Sattler, Johannes, Christoph and Alexopoulos, Spiros and Caminos, Ricardo Alexander Chico and Mitchell, John C. and Ruiz, Victor C. and Kalogirou, Soteris and Ktistis, Panayiotis K. and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Dynamic simulation model of a parabolic trough collector system with concrete thermal energy storage for process steam generation}, series = {AIP Conference Proceedings}, volume = {2126}, booktitle = {AIP Conference Proceedings}, issn = {0094243X}, doi = {10.1063/1.5117663}, pages = {150007-1 -- 150007-8}, year = {2019}, language = {en} } @inproceedings{SattlerSchneiderAngeleetal.2022, author = {Sattler, Johannes Christoph and Schneider, Iesse Peer and Angele, Florian and Atti, Vikrama and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Development of heliostat field calibration methods: Theory and experimental test results}, series = {SolarPACES conference proceedings}, booktitle = {SolarPACES conference proceedings}, number = {Vol. 1}, publisher = {TIB Open Publishing}, address = {Hannover}, issn = {2751-9899 (online)}, doi = {10.52825/solarpaces.v1i.678}, pages = {9 Seiten}, year = {2022}, abstract = {In this work, three patent pending calibration methods for heliostat fields of central receiver systems (CRS) developed by the Solar-Institut J{\"u}lich (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.}, language = {en} } @inproceedings{SattlerChicoCaminosAttietal.2020, author = {Sattler, Johannes Christoph and Chico Caminos, Ricardo Alexander and Atti, Vikrama Nagababu and {\"U}rlings, Nicolas and Dutta, Siddharth and Ruiz, Victor and Kalogirou, Soteris and Ktistis, Panayiotis and Agathokleous, Rafaela and Alexopoulos, Spiros and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Dynamic simulation tool for a performance evaluation and sensitivity study of a parabolic trough collector system with concrete thermal energy storage}, series = {AIP Conference Proceedings 2303}, booktitle = {AIP Conference Proceedings 2303}, publisher = {American Institute of Physics}, address = {Melville, NY}, issn = {0094-243X}, doi = {10.1063/5.0029277}, pages = {160004}, year = {2020}, language = {de} } @inproceedings{SattlerAttiAlexopoulosetal.2022, author = {Sattler, Johannes Christoph and Atti, Vikrama and Alexopoulos, Spiros and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf and Dutta, Siddharth and Kioutsioukis, Ioannis}, title = {DNI forecast tool for the smart operation of a parabolic trough collector system with concrete thermal energy storage: Theory, results and outlook}, series = {SolarPACES conference proceedings}, booktitle = {SolarPACES conference proceedings}, number = {VOL. 1}, publisher = {TIB Open Publishing}, address = {Hannover}, issn = {2751-9899 (online)}, doi = {10.52825/solarpaces.v1i.731}, pages = {9 Seiten}, year = {2022}, abstract = {This work presents a basic forecast tool for predicting direct normal irradiance (DNI) in hourly resolution, which the Solar-Institut J{\"u}lich (SIJ) is developing within a research project. The DNI forecast data shall be used for a parabolic trough collector (PTC) system with a concrete thermal energy storage (C-TES) located at the company KEAN Soft Drinks Ltd in Limassol, Cyprus. On a daily basis, 24-hour DNI prediction data in hourly resolution shall be automatically produced using free or very low-cost weather forecast data as input. The purpose of the DNI forecast tool is to automatically transfer the DNI forecast data on a daily basis to a main control unit (MCU). The MCU automatically makes a smart decision on the operation mode of the PTC system such as steam production mode and/or C-TES charging mode. The DNI forecast tool was evaluated using historical data of measured DNI from an on-site weather station, which was compared to the DNI forecast data. The DNI forecast tool was tested using data from 56 days between January and March 2022, which included days with a strong variation in DNI due to cloud passages. For the evaluation of the DNI forecast reliability, three categories were created and the forecast data was sorted accordingly. The result was that the DNI forecast tool has a reliability of 71.4 \% based on the tested days. The result fulfils SIJ's aim to achieve a reliability of around 70 \%, but SIJ aims to still improve the DNI forecast quality.}, language = {en} } @article{RussGoettsche2005, author = {Russ, Christel and G{\"o}ttsche, Joachim}, title = {Energieversorgung in Niedrigstenergie-Wohngeb{\"a}uden}, series = {W{\"a}rme und K{\"a}lte - Energie aus Sonne und Erde : Jahrestagung des Forschungsverbunds Sonnenenergie in Kooperation mit der Landesinitiative Zukunftsenergien NRW, 22.-23.09.2005 in K{\"o}ln / [Hrsg.: Gerd Stadermann]}, journal = {W{\"a}rme und K{\"a}lte - Energie aus Sonne und Erde : Jahrestagung des Forschungsverbunds Sonnenenergie in Kooperation mit der Landesinitiative Zukunftsenergien NRW, 22.-23.09.2005 in K{\"o}ln / [Hrsg.: Gerd Stadermann]}, publisher = {FVS}, address = {Berlin}, pages = {93 -- 98}, year = {2005}, language = {de} } @inproceedings{RepschlaegerHafnerMelissetal.1998, author = {Repschl{\"a}ger, Horst and Hafner, Bernd and Meliß, Michael and Philippi, Helga and Sp{\"a}te, Frank}, title = {Vergleich verschiedener Netzvarianten am Beispiel des geplanten solaren Nahw{\"a}rmesystems f{\"u}r den Solar-Campus J{\"u}lich}, series = {8. Symposium Thermische Solarenergie : Ort: Bildungszentrum der Hanns-Seidel-Stiftung, Kloster Banz, Staffelstein. Termin: 13. - 15. Mai 1998 / OTTI, Technologie-Kolleg}, booktitle = {8. Symposium Thermische Solarenergie : Ort: Bildungszentrum der Hanns-Seidel-Stiftung, Kloster Banz, Staffelstein. Termin: 13. - 15. Mai 1998 / OTTI, Technologie-Kolleg}, publisher = {OTTI}, address = {Regensburg}, pages = {310 -- 314}, year = {1998}, language = {de} } @inproceedings{RendonSchwagerGhiasietal.2020, author = {Rendon, Carlos and Schwager, Christian and Ghiasi, Mona and Schmitz, Pascal and Bohang, Fakhri and Caminos, Ricardo Alexander Chico and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Modeling and upscaling of a pilot bayonettube reactor for indirect solar mixed methane reforming}, series = {AIP Conference Proceedings}, booktitle = {AIP Conference Proceedings}, number = {2303}, doi = {10.1063/5.0029974}, pages = {170012-1 -- 170012-9}, year = {2020}, language = {en} } @inproceedings{RendonDieckmannWeidleetal.2018, author = {Rendon, Carlos and Dieckmann, Simon and Weidle, Mathias and Dersch, J{\"u}rgen and Teixeira Boura, Cristiano Jos{\´e} and Polklas, Thomas and Kuschel, Marcus and Herrmann, Ulf}, title = {Retrofitting of existing parabolic trough collector power plants with molten salt tower systems}, series = {AIP Conference Proceedings}, volume = {2033}, booktitle = {AIP Conference Proceedings}, number = {1}, doi = {10.1063/1.5067030}, pages = {030014-1 -- 030014-8}, year = {2018}, language = {en} } @article{ReisgenSchleserAbdurakhmanovetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Abdurakhmanov, Aydemir and Turichin, Gleb and Valdaitseva, Elena and Bach, Friedrich-Wilhelm and Hassel, Thomas and Beniyashi, Alexander}, title = {Investigation of factors influencing the formation of weld defects in non-vacuum electron beam welding}, series = {The Paton welding journal}, volume = {2012}, journal = {The Paton welding journal}, number = {2}, publisher = {Paton Publishing House}, address = {Kiev}, issn = {0957-798X}, pages = {11 -- 18}, year = {2012}, abstract = {The influence of welding condition parameters and properties of material on formation of defects, such as humping and undercuts, in non-vacuum electron beam welding was investigated. The influence of separate welding parameters on the quality of welds was determined.}, language = {en} } @article{RegerKuhnhenneHachuletal.2019, author = {Reger, Vitali and Kuhnhenne, Markus and Hachul, Helmut and D{\"o}ring, Bernd and Blanke, Tobias and G{\"o}ttsche, Joachim}, title = {Plusenergiegeb{\"a}ude 2.0 in Stahlleichtbauweise}, series = {Stahlbau}, volume = {88}, journal = {Stahlbau}, number = {6}, publisher = {Ernst \& Sohn}, address = {Berlin}, issn = {1437-1049 (E-journal), 0038-9145 (print)}, doi = {10.1002/stab.201900034}, pages = {522 -- 528}, year = {2019}, language = {de} } @article{RegerKuhnhenneEbbertetal.2020, author = {Reger, Vitali and Kuhnhenne, Markus and Ebbert, Thiemo and Hachul, Helmut and Blanke, Tobias and D{\"o}ring, Bernd}, title = {Nutzung erneuerbarer Energien durch thermische Aktivierung von Komponenten aus Stahl}, series = {Stahlbau}, volume = {2020}, journal = {Stahlbau}, number = {Volume 89, Issue 6512-519}, publisher = {Ernst \& Sohn}, address = {Berlin}, issn = {1437-1049}, doi = {10.1002/stab.202000031}, pages = {512 -- 519}, year = {2020}, abstract = {Die Versorgung von Neubauten soll m{\"o}glichst weitgehend unabh{\"a}ngig von fossilen Energietr{\"a}gern erfolgen. Erneuerbare Energien spielen daf{\"u}r eine gewichtige Rolle. Eine gute M{\"o}glichkeit, erneuerbare Energien ohne viel zus{\"a}tzlichen Aufwand nutzbar zu machen, ist, bereits vorhandenen Komponenten im Geb{\"a}ude zus{\"a}tzliche Funktionen zu geben. Hier kann bspw. die Fassade oder das Dach solarthermisch aktiviert oder durch Fotovoltaikmodule erg{\"a}nzt werden. Auch Tiefgr{\"u}ndungen k{\"o}nnen neben der statischen Funktion noch eine geothermische Funktion zur Aufnahme oder Abgabe von W{\"a}rme erhalten. Neben der Erzeugung bietet sich auch f{\"u}r die Verteilung der W{\"a}rme oder K{\"a}lte im Geb{\"a}ude die Integration in Bauteile an. Hier kann bspw. der Boden durch eine Fußbodenheizung oder die Decke durch Deckenstrahlplatten aktiviert werden. Im Rahmen der Ver{\"o}ffentlichung wird auf die thermische Aktivierung von Stahlkomponenten eingegangen. Es wird eine L{\"o}sung vorgestellt, die vorgeh{\"a}ngte hinterl{\"u}ftete Stahlfassade (VHF) solarthermisch zu aktivieren. Außerdem werden zwei M{\"o}glichkeiten zur geothermischen Aktivierung von Tiefgr{\"u}ndungen mittels Stahlpf{\"a}hlen gezeigt. Zuletzt wird ein System zur thermischen Aktivierung von Stahltrapezprofilen an der Decke erl{\"a}utert, welches W{\"a}rme zuf{\"u}hren oder bei Bedarf abf{\"u}hren kann.}, language = {de} } @inproceedings{RazenSpaeteMelissetal.1998, author = {Razen, Manfred and Sp{\"a}te, Frank and Meliß, Michael and Breuer, Maria and Hubrich, J{\"o}rg and Rischert, Christa}, title = {Aus-, Fort- und Weiterbildung am Solar-Institut J{\"u}lich}, series = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, booktitle = {Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule K{\"o}ln / 11. Internationales Sonnenforum}, publisher = {Solar Promotion}, address = {M{\"u}nchen}, organization = {Deutsche Gesellschaft f{\"u}r Sonnenenergie}, pages = {1071 -- 1078}, year = {1998}, language = {de} } @article{RauAlexopoulosBreitbachetal.2014, author = {Rau, Christoph and Alexopoulos, Spiros and Breitbach, Gerd and Hoffschmidt, Bernhard and Latzke, Markus and Sattler, Johannes, Christoph}, title = {Transient simulation of a solar-hybrid tower power plant with open volumetric receiver at the location Barstow}, series = {Energy procedia : proceedings of the SolarPACES 2013 International Conference}, volume = {49}, journal = {Energy procedia : proceedings of the SolarPACES 2013 International Conference}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1876-6102}, doi = {10.1016/j.egypro.2014.03.157}, pages = {1481 -- 1490}, year = {2014}, abstract = {In this work the transient simulations of four hybrid solar tower power plant concepts with open-volumetric receiver technology for a location in Barstow-Daggett, USA, are presented. The open-volumetric receiver uses ambient air as heat transfer fluid and the hybridization is realized with a gas turbine. The Rankine cycle is heated by solar-heated air and/or by the gas turbine's flue gases. The plant can be operated in solar-only, hybrid parallel or combined cycle-only mode as well as in any intermediate load levels where the solar portion can vary between 0 to 100\%. The simulated plant is based on the configuration of a solar-hybrid power tower project, which is in planning for a site in Northern Algeria. The meteorological data for Barstow-Daggett was taken from the software meteonorm. The solar power tower simulation tool has been developed in the simulation environment MATLAB/Simulink and is validated.}, language = {en} } @article{PuppeGiulianoFrantzetal.2018, author = {Puppe, Michael and Giuliano, Stefano and Frantz, Cathy and Uhlig, Ralf and Schumacher, Ralph and Ibraheem, Wagdi and Schmalz, Stefan and Waldmann, Barbara and Guder, Christoph and Peter, Dennis and Schwager, Christian and Teixeira Boura, Cristiano Jos{\´e} and Alexopoulos, Spiros and Spiegel, Michael and Wortmann, J{\"u}rgen and Hinrichs, Matthias and Engelhard, Manfred and Aust, Michael}, title = {Techno-economic optimization of molten salt solar tower plants}, series = {AIP Conference Proceedings art.no. 040033}, volume = {2033}, journal = {AIP Conference Proceedings art.no. 040033}, number = {Issue 1}, publisher = {AIP Publishing}, address = {Melville, NY}, doi = {10.1063/1.5067069}, year = {2018}, abstract = {In this paper the results of a techno-economic analysis of improved and optimized molten salt solar tower plants (MSSTP plants) are presented. The potential improvements that were analyzed include different receiver designs, different designs of the HTF-system and plant control, increased molten salt temperatures (up to 640°C) and multi-tower systems. Detailed technological and economic models of the solar field, solar receiver and high temperature fluid system (HTF-system) were developed and used to find potential improvements compared to a reference plant based on Solar Two technology and up-to-date cost estimations. The annual yield model calculates the annual outputs and the LCOE of all variants. An improved external tubular receiver and improved HTF-system achieves a significant decrease of LCOE compared to the reference. This is caused by lower receiver cost as well as improvements of the HTF-system and plant operation strategy, significantly reducing the plant own consumption. A novel star receiver shows potential for further cost decrease. The cavity receiver concepts result in higher LCOE due to their high investment cost, despite achieving higher efficiencies. Increased molten salt temperatures seem possible with an adapted, closed loop HTF-system and achieve comparable results to the original improved system (with 565°C) under the given boundary conditions. In this analysis all multi tower systems show lower economic viability compared to single tower systems, caused by high additional cost for piping connections and higher cost of the receivers. REFERENCES}, language = {en} } @inproceedings{PompSchwarzboezlKolletal.2010, author = {Pomp, Stefan and Schwarzb{\"o}zl, Peter and Koll, Gerrit and Hennecke, Klaus and Schmitz, Mark and Hoffschmidt, Bernhard}, title = {Advanced concept for a solar thermal power plant with open volumetric air receiver}, series = {SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France}, booktitle = {SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France}, publisher = {Soc. OSC}, address = {Saint Maur}, pages = {97 -- 98}, year = {2010}, language = {en} } @article{PeereBlanke2022, author = {Peere, Wouter and Blanke, Tobias}, title = {GHEtool: An open-source tool for borefield sizing in Python}, series = {Journal of Open Source Software}, volume = {7}, journal = {Journal of Open Source Software}, number = {76}, editor = {Vernon, Chris}, issn = {2475-9066}, doi = {10.21105/joss.04406}, pages = {1 -- 4, 4406}, year = {2022}, abstract = {GHEtool is a Python package that contains all the functionalities needed to deal with borefield design. It is developed for both researchers and practitioners. The core of this package is the automated sizing of borefield under different conditions. The sizing of a borefield is typically slow due to the high complexity of the mathematical background. Because this tool has a lot of precalculated data, GHEtool can size a borefield in the order of tenths of milliseconds. This sizing typically takes the order of minutes. Therefore, this tool is suited for being implemented in typical workflows where iterations are required. GHEtool also comes with a graphical user interface (GUI). This GUI is prebuilt as an exe-file because this provides access to all the functionalities without coding. A setup to install the GUI at the user-defined place is also implemented and available at: https://www.mech.kuleuven.be/en/tme/research/thermal_systems/tools/ghetool.}, language = {en} } @inproceedings{OetringerDuemmlerGoettsche2020, author = {Oetringer, Kerstin and D{\"u}mmler, Andreas and G{\"o}ttsche, Joachim}, title = {Neues Modell zur 1D-Simulation der indirekten Verdunstungsk{\"u}hlung}, series = {DKV-Tagung 2020, AA II.1}, booktitle = {DKV-Tagung 2020, AA II.1}, pages = {1 -- 13}, year = {2020}, language = {de} } @inproceedings{NiederwestbergSchneiderTeixeiraBouraetal.2022, author = {Niederwestberg, Stefan and Schneider, Falko and Teixeira Boura, Cristiano Jos{\´e} and Herrmann, Ulf}, title = {Introduction to a direct irradiated transparent tube particle receiver}, series = {SOLARPACES 2020}, booktitle = {SOLARPACES 2020}, number = {2445 / 1}, publisher = {AIP conference proceedings / American Institute of Physics}, address = {Melville, NY}, isbn = {978-0-7354-4195-8}, issn = {1551-7616 (online)}, doi = {10.1063/5.0086735}, pages = {9 Seiten}, year = {2022}, abstract = {New materials often lead to innovations and advantages in technical applications. This also applies to the particle receiver proposed in this work that deploys high-temperature and scratch resistant transparent ceramics. With this receiver design, particles are heated through direct-contact concentrated solar irradiance while flowing downwards through tubular transparent ceramics from top to bottom. In this paper, the developed particle receiver as well as advantages and disadvantages are described. Investigations on the particle heat-up characteristics from solar irradiance were carried out with DEM simulations which indicate that particle temperatures can reach up to 1200 K. Additionally, a simulation model was set up for investigating the dynamic behavior. A test receiver at laboratory scale has been designed and is currently being built. In upcoming tests, the receiver test rig will be used to validate the simulation results. The design and the measurement equipment is described in this work.}, language = {en} } @inproceedings{NeumannAdamBackesetal.2021, author = {Neumann, Hannah and Adam, Mario and Backes, Klaus and B{\"o}rner, Martin and Clees, Tanja and Doetsch, Christian and Glaeser, Susanne and Herrmann, Ulf and May, Johanna and Rosenthal, Florian and Sauer, Dirk Uwe and Stadler, Ingo}, title = {Development of open educational resources for renewable energy and the energy transition process}, series = {ISES SWC 2021}, booktitle = {ISES SWC 2021}, publisher = {International Solar Energy Society}, address = {Freiburg}, doi = {10.18086/swc.2021.47.03}, pages = {6 Seiten}, year = {2021}, abstract = {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.}, language = {en} } @inproceedings{MohanGrossMenzeletal.2021, author = {Mohan, Nijanthan and Groß, Rolf Fritz and Menzel, Karsten and Theis, Fabian}, title = {Opportunities and Challenges in the Implementation of Building Information Modeling for Prefabrication of Heating, Ventilation and Air Conditioning Systems in Small and Medium-Sized Contracting Companies in Germany - A Case Study}, series = {WIT Transactions on The Built Environment, Vol. 205}, booktitle = {WIT Transactions on The Built Environment, Vol. 205}, publisher = {WIT Press}, address = {Southampton}, issn = {1743-3509}, doi = {10.2495/BIM210101}, pages = {117 -- 126}, year = {2021}, abstract = {FEven though BIM (Building Information Modelling) is successfully implemented in most of the world, it is still in the early stages in Germany, since the stakeholders are sceptical of its reliability and efficiency. The purpose of this paper is to analyse the opportunities and obstacles to implementing BIM for prefabrication. Among all other advantages of BIM, prefabrication is chosen for this paper because it plays a vital role in creating an impact on the time and cost factors of a construction project. The project stakeholders and participants can explicitly observe the positive impact of prefabrication, which enables the breakthrough of the scepticism factor among the small-scale construction companies. The analysis consists of the development of a process workflow for implementing prefabrication in building construction followed by a practical approach, which was executed with two case studies. It was planned in such a way that, the first case study gives a first-hand experience for the workers at the site on the BIM model so that they can make much use of the created BIM model, which is a better representation compared to the traditional 2D plan. The main aim of the first case study is to create a belief in the implementation of BIM Models, which was succeeded by the execution of offshore prefabrication in the second case study. Based on the case studies, the time analysis was made and it is inferred that the implementation of BIM for prefabrication can reduce construction time, ensures minimal wastes, better accuracy, less problem-solving at the construction site. It was observed that this process requires more planning time, better communication between different disciplines, which was the major obstacle for successful implementation. This paper was carried out from the perspective of small and medium-sized mechanical contracting companies for the private building sector in Germany.}, language = {en} } @article{MeyerHaenelBeehetal.2020, author = {Meyer, S. and H{\"a}nel, Matthias and Beeh, B. and Dittmann-Gabriel, S{\"o}ren and Dluhosch, R. and May, Martin and Herrmann, Ulf and [und 5 weitere],}, title = {Multifunktionaler thermischer Stromspeicher f{\"u}r die Strom- und W{\"a}rmeversorgung der Industrie von morgen}, series = {ETG Journal / Energietechnische Gesellschaft im VDE (ETG)}, volume = {2020}, journal = {ETG Journal / Energietechnische Gesellschaft im VDE (ETG)}, number = {1}, issn = {2625-9907}, pages = {6 -- 9}, year = {2020}, language = {de} } @article{MelissWindheim1977, author = {Meliß, Michael and Windheim, R.}, title = {Energiequelle f{\"u}r morgen : M{\"o}glichkeiten und Grenzen der Windenergienutzung - ein Statusbericht}, series = {VDI-Nachrichten. Bd. 31 (1977), H. 22}, journal = {VDI-Nachrichten. Bd. 31 (1977), H. 22}, issn = {0042-1758}, pages = {37 -- 38}, year = {1977}, language = {de} } @article{MelissWiesner1996, author = {Meliß, Michael and Wiesner, W.}, title = {Schwerpunkte der Arbeitsgemeinschaft Solar NRW. Dezentrale Energiesysteme sowie Test und Qualifizierung}, series = {Energiewirtschaftliche Tagesfragen. Jg. 46 (1996), H. 10}, journal = {Energiewirtschaftliche Tagesfragen. Jg. 46 (1996), H. 10}, pages = {648 -- 655}, year = {1996}, language = {de} } @inproceedings{MelissSpaeteLange1999, author = {Meliß, Michael and Sp{\"a}te, Frank and Lange, Harald}, title = {The Solar-Campus J{\"u}lich - an interdisciplinary project}, series = {Building a new century. 5th Conference on Solar Architecture and Design, Bonn, 27th of May 1998. Ed. by Eurosolar e.V. Ed. by Irm Pontenagel.}, booktitle = {Building a new century. 5th Conference on Solar Architecture and Design, Bonn, 27th of May 1998. Ed. by Eurosolar e.V. Ed. by Irm Pontenagel.}, publisher = {Eurosolar-Verl.}, address = {Bonn}, isbn = {3-933745-03-9}, pages = {382 -- 387}, year = {1999}, language = {en} } @article{MelissSpaete2000, author = {Meliß, Michael and Sp{\"a}te, Frank}, title = {The solar heating system with seasonal storage at the Solar-Campus J{\"u}lich}, series = {Solar energy. Vol. 69 (2000), iss. 6}, journal = {Solar energy. Vol. 69 (2000), iss. 6}, issn = {0038-092X}, pages = {525 -- 533}, year = {2000}, language = {en} } @article{MelissSpaete1995, author = {Meliß, Michael and Sp{\"a}te, Frank}, title = {Erneuerbare Energien sollen in die Bresche springen. Geld, Kraft und politisches Wollen ist gefragt}, series = {VDI-Nachrichten. Nr. 46 vom 17.11.1995}, journal = {VDI-Nachrichten. Nr. 46 vom 17.11.1995}, issn = {0042-1758}, pages = {33}, year = {1995}, language = {de} } @article{MelissSpaete1996, author = {Meliß, Michael and Sp{\"a}te, Frank}, title = {Sonne, Wind und Biomasse zur umweltfreundlichen Energieversorgung}, series = {Wohnung + Gesundheit. Fachzeitschrift f{\"u}r {\"o}kologisches Bauen + Leben. 18 (1996), Nr. 79}, journal = {Wohnung + Gesundheit. Fachzeitschrift f{\"u}r {\"o}kologisches Bauen + Leben. 18 (1996), Nr. 79}, issn = {0176-0513}, pages = {47 -- 50}, year = {1996}, language = {de} } @incollection{MelissSpaete1997, author = {Meliß, Michael and Sp{\"a}te, Frank}, title = {Berechnung von Sonnenstand und -strahlung}, series = {Regenerative Energiequellen : Praktikum / ed. Michael Meliß}, booktitle = {Regenerative Energiequellen : Praktikum / ed. Michael Meliß}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-63218-2}, doi = {10.1007/978-3-642-60864-3_2}, pages = {5 -- 22}, year = {1997}, language = {de} } @incollection{MelissSpaete1997, author = {Meliß, Michael and Sp{\"a}te, Frank}, title = {Auslegung von solarthermischen Anlagen}, series = {Regenerative Energiequellen : Praktikum / ed. Michael Meliß}, booktitle = {Regenerative Energiequellen : Praktikum / ed. Michael Meliß}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-63218-2}, doi = {10.1007/978-3-642-60864-3_3}, pages = {23 -- 47}, year = {1997}, language = {de} } @inproceedings{MelissSpaete1996, author = {Meliß, Michael and Sp{\"a}te, Frank}, title = {Solar-Campus J{\"u}lich - an interdisciplinary project}, series = {EuroSun '96 ; 10. Internationales Sonnenforum : proceedings. Bd 3}, booktitle = {EuroSun '96 ; 10. Internationales Sonnenforum : proceedings. Bd 3}, publisher = {DGS-Sonnenenergie}, address = {M{\"u}nchen}, pages = {1281 -- 1285}, year = {1996}, language = {en} } @inproceedings{MelissSpaete1993, author = {Meliß, Michael and Sp{\"a}te, F.}, title = {The "Summerschool Renewable Energies" at the Fachhochschule Aachen, Abteilung J{\"u}lich/Germany}, series = {Harmony with nature : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 1: Energy policy, environment and education}, booktitle = {Harmony with nature : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 1: Energy policy, environment and education}, publisher = {Hungarian Energy Society}, address = {Budapest}, pages = {371 -- 376}, year = {1993}, language = {en} } @article{MelissSelzerZiesing1991, author = {Meliß, Michael and Selzer, H. and Ziesing, H. J.}, title = {CO2-Reduktionspotentiale erneuerbarer Energiequellen}, series = {Energiewirtschaftliche Tagesfragen. Jg. 41 (1991), H. 5}, journal = {Energiewirtschaftliche Tagesfragen. Jg. 41 (1991), H. 5}, issn = {0013-743X ; 0720-6240}, pages = {291 -- 299}, year = {1991}, language = {de} } @inproceedings{MelissSchwarzerSpaeteetal.1992, author = {Meliß, Michael and Schwarzer, Klemens and Sp{\"a}te, F. and Neskakis, A. and Buck, H.}, title = {Die Arbeitsgemeinschaft Solar Nordrhein-Westfalen, Schwerpunkt B: Dezentrale Energietechnologien}, series = {Energie und unsere Umwelt. 8. Internationales Sonnenforum '92, 30. Juni - 3. Juli 1992. Bd. 2}, booktitle = {Energie und unsere Umwelt. 8. Internationales Sonnenforum '92, 30. Juni - 3. Juli 1992. Bd. 2}, publisher = {DGS-Sonnenenergie-Verl.}, address = {M{\"u}nchen}, pages = {1439 -- 1444}, year = {1992}, language = {de} } @article{MelissSandtner1996, author = {Meliß, Michael and Sandtner, W.}, title = {Der Forschungsstand bei den regenerativen Energiequellen}, series = {Energiewirtschaftliche Tagesfragen. Jg. 46 (1996), H. 1/2}, journal = {Energiewirtschaftliche Tagesfragen. Jg. 46 (1996), H. 1/2}, issn = {0720-6240}, pages = {14 -- 23}, year = {1996}, language = {de} } @inproceedings{MelissNeskakisUsbecketal.1993, author = {Meliß, Michael and Neskakis, A. and Usbeck, S. and Wagner, L. and Wiediger, J{\"u}rgen}, title = {Energy supply by coupled solar systems for decentralized application}, series = {Harmony with nature : : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 8: Biomass, agriculture, wind}, booktitle = {Harmony with nature : : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 8: Biomass, agriculture, wind}, publisher = {Hungarian Energy Society}, address = {Budapest}, pages = {343 -- 348}, year = {1993}, language = {en} } @article{MelissNeskakisUsbecketal.1994, author = {Meliß, Michael and Neskakis, A. and Usbeck, S. and Wagner, L. and Wiediger, J{\"u}rgen}, title = {Photovoltaisch versorgte K{\"u}hlanlage in J{\"u}lich und Chania}, series = {Energiewirtschaftliche Tagesfragen. Jg. 44 (1994), H. 9 (special)}, journal = {Energiewirtschaftliche Tagesfragen. Jg. 44 (1994), H. 9 (special)}, issn = {0720-6240}, pages = {22 -- 25}, year = {1994}, language = {de} } @article{MelissNeskakisUsbecketal.1994, author = {Meliß, Michael and Neskakis, A. and Usbeck, S. and Wagner, L. and Wiediger, J{\"u}rgen}, title = {Wind-PV-Hybridsystem an der FH Aachen/J{\"u}lich}, series = {Energiewirtschaftliche Tagesfragen. Jg. 44 (1994), H. 9 (special)}, journal = {Energiewirtschaftliche Tagesfragen. Jg. 44 (1994), H. 9 (special)}, issn = {0720-6240}, pages = {34 -- 40}, year = {1994}, language = {de} } @inproceedings{MelissNeskakisUsbecketal.1993, author = {Meliß, Michael and Neskakis, A. and Usbeck, S. and Wagner, L. and Wiediger, J{\"u}rgen}, title = {Energiebereitstellung f{\"u}r dezentrale Anwendungen durch gekoppelte Solarsysteme}, series = {Achtes Nationales Symposium Photovoltaische Solarenergie : 17. - 19. M{\"a}rz 1993, Kloster Banz, Staffelstein}, booktitle = {Achtes Nationales Symposium Photovoltaische Solarenergie : 17. - 19. M{\"a}rz 1993, Kloster Banz, Staffelstein}, publisher = {OTTI}, address = {Regensburg}, pages = {496 -- 500}, year = {1993}, language = {de} }