TY - CHAP A1 - Hoffschmidt, Bernhard A1 - Faber, Christian T1 - Lighthouse project for North-Rhine Westfalia - Solar thermal R & D Power Planet in Jülich T2 - Energy security, climate change and sustainable development / ed. Jyotirmay Mathur ... Y1 - 2007 SN - 81-88342-81-5 SP - 101 EP - 116 PB - Anamaya Publ. CY - New Delhi ER - TY - CHAP A1 - Hartz, Thomas T1 - LACASA - ein Instrument zur energetischen Analyse und Optimierung von Gebäuden mit Anlagentechnik T2 - 14. Symposium Thermische Solarenergie : 12. bis 14. Mai 2004, Kloster Banz, Bad Staffelstein / OTTI-Kolleg Technik, Energie, Management Y1 - 2004 SP - 402 EP - 406 PB - OTTI-Energie-Kolleg CY - Regensburg ER - TY - CHAP A1 - Ille, Fabian A1 - Schramm, S. A1 - Adam, M. A1 - Backes, K. A1 - Anthrakidis, Anette A1 - Faber, Christian T1 - Kraft-Wärme-Kälte-Kopplung im Leistungsbereich in 10kW mit periodisch arbeitender Sorptionsmaschine T2 - DKV-Tagungsbericht. 35,2,1. Deutsche Kälte-Klima-Tagung 2008 Ulm Y1 - 2009 SN - 978-3-932715-44-0 SP - 305 EP - 320 PB - Dt. Kälte- und Klimatechnischer Verein CY - Hannover ER - TY - CHAP A1 - Hoffschmidt, Bernhard T1 - Kooperationen und Ziele am Standort Jülich T2 - Forschung und Entwicklung für solarthermische Kraftwerke : 14. Kölner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus Jülich der FH Aachen : Kurzfassungen der Vorträge und Poster Y1 - 2011 SP - 4 S. PB - DLR CY - Köln ER - TY - JOUR A1 - Blanke, Tobias A1 - Reger, Vitali A1 - Döring, Bernd A1 - Göttsche, Joachim A1 - Kuhnhenne, Markus T1 - Koaxiale Stahlenergiepfähle JF - Stahlbau N2 - Ein entscheidender Teil der Energiewende ist die Wärmewende im Gebäudesektor. Ein Schlüsselelement sind hier Wärmepumpen. Diese benötigen eine Wärmequelle, der sie Energie entziehen können, um sie auf ein höheres Temperaturniveau zu transformieren. Diese Wärmequelle kann bspw. das Erdreich sein, dessen Wärme durch Erdsonden erschlossen werden kann. In diesem Beitrag werden in Stahlpfähle integrierte Koaxialsonden mit dem Stand der Technik von Erdsonden gleichen Durchmessers bezüglich ihrer thermischen Leistungsmerkmale verglichen. Die Stahlenergiepfähle bieten neben der Wärmegewinnung weitere Vorteile, da sie auch eine statische Funktion übernehmen und rückstandsfrei zurückgebaut werden können. Es werden analytische und numerische Berechnungen vorgestellt, um die thermischen Potenziale beider Systeme zu vergleichen. Außerdem wird ein Testaufbau gezeigt, bei dem Stahlenergiepfähle in zwei verschiedenen Längen mit vorhandenen gängigen Erdsonden verglichen werden können. Die Berechnungen zeigen einen deutlichen thermischen Mehrertrag zwischen 26 % und 148 % der Stahlenergiepfähle gegenüber dem Stand der Technik abhängig vom Erdreich. Die Messergebnisse zeigen einen thermischen Mehrertrag von über 100 %. Es lässt sich also signifikante Erdsondenlänge einsparen. Dabei ist zu beachten, dass sich damit der thermisch genutzte Bereich des Erdreichs reduziert, wodurch die thermische Regeneration und/oder das Langzeitverhalten des Erdreichs an Bedeutung gewinnt. Y1 - 2021 VL - 90. 2021 IS - 6 SP - 417 EP - 424 PB - Wiley CY - Weinheim ER - TY - RPRT A1 - Damm, Marc André A1 - Anthrakidis, Anette A1 - Fend, Thomas T1 - Keramische Porenkörpersysteme als SCR-Mischer und Hydrolysekatalysator : BMBF-Projekt: Hydromix : Schlussbericht : Laufzeit: 01.10.2011 bis 31.03.2015 Y1 - 2016 CY - Aachen ER - TY - CHAP A1 - Sauerborn, Markus T1 - Investigations to the influence of clouds and aerosols to the haze of the sunshape T2 - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain Y1 - 2011 CY - Granada ER - TY - JOUR A1 - Reisgen, Uwe A1 - Schleser, Markus A1 - Abdurakhmanov, Aydemir A1 - Turichin, Gleb A1 - Valdaitseva, Elena A1 - Bach, Friedrich-Wilhelm A1 - Hassel, Thomas A1 - Beniyashi, Alexander T1 - Investigation of factors influencing the formation of weld defects in non-vacuum electron beam welding JF - The Paton welding journal N2 - 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. Y1 - 2012 SN - 0957-798X VL - 2012 IS - 2 SP - 11 EP - 18 PB - Paton Publishing House CY - Kiev ER - TY - CHAP A1 - Niederwestberg, Stefan A1 - Schneider, Falko A1 - Teixeira Boura, Cristiano José A1 - Herrmann, Ulf T1 - Introduction to a direct irradiated transparent tube particle receiver T2 - SOLARPACES 2020 N2 - 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. KW - Solar irradiance KW - Ceramics Y1 - 2022 SN - 978-0-7354-4195-8 U6 - http://dx.doi.org/10.1063/5.0086735 SN - 1551-7616 (online) SN - 0094-243X (print) N1 - 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September–2 October 2020 Freiburg, Germany IS - 2445 / 1 PB - AIP conference proceedings / American Institute of Physics CY - Melville, NY ER - TY - CHAP A1 - Schulze-Buxloh, Lina A1 - Groß, Rolf Fritz T1 - Interdisciplinary Course Smart Building Engineering: A new approach of teaching freshmen in remote teamwork project under pandemic restrictions T2 - New Perspectives in Science Education -International Conference (virtual event, 18-19 March 2021) N2 - 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. KW - Freshmen KW - roleplay KW - Smart Building Engineering KW - BIM KW - remote teamwork Y1 - 2021 N1 - New Perspectives in Science Education - 10th Edition 18-19 March 2021 Fully Virtual Conference PB - Filodiritto CY - Bologna ER - TY - CHAP A1 - Gonsior, Daniel A1 - Hoffschmidt, Bernhard T1 - Innovative Rußfilter für LKW-Dieselmotoren (Innotrap) T2 - Feinstaubforschung in Nordrhein-Westfalen. LANUV-Fachbericht. 9 Y1 - 2008 SN - 1864-3930 SP - 13 EP - 14 PB - Landesamt für Natur, Umwelt und Verbraucherschutz Nordrhein-Westfalen CY - Recklinghausen ER - TY - RPRT A1 - Adler, J. A1 - Heymer, H. A1 - Richter, H. J. A1 - Fend, Th. A1 - Smirnova, O. A1 - Rietbrock, P. A1 - Petchenko, A. A1 - Issendorff, F. v. A1 - Steven, M. A1 - Trimis, D. A1 - Gonsior, Daniel A1 - Helsper, Christoph A1 - Hoffschmidt, Bernhard T1 - INNOTRAP - innovative Rußfilter für LKW-Dieselmotoren : Abschlussbericht Förderkennzeichen 16IN0313 Y1 - 2009 ER - TY - CHAP A1 - Fricke, Barbara A1 - Ziolko, C. A1 - Anthrakidis, Anette A1 - Alexopoulos, Spiros A1 - Hoffschmidt, Bernhard A1 - Dillig, M. A1 - Giese, F. T1 - InnoSol - life cycle analysis of solar power tower plants T2 - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain Y1 - 2011 CY - Granada ER - TY - CHAP A1 - Fricke, Barbara A1 - Ziolko, C. A1 - Anthrakidis, Anette A1 - Alexopoulos, Spiros A1 - Hoffschmidt, Bernhard A1 - Giese, F. A1 - Dillig, M. T1 - InnoSol - environmental aspects of the open volumetric receiver technology T2 - 30th ISES Biennial Solar World Congress 2011 : : Kassel, Germany, 28 August - 2 September 2011. Vol. 5 Y1 - 2012 SP - 3895 EP - 3900 PB - Curran CY - Red Hook, NY ER - TY - CHAP A1 - Sauerborn, Markus A1 - Arshadi, S. A1 - Rohrmoser, R. T1 - Influence of clouds and aerosols to the haze of the sunshape T2 - 30th ISES Biennial Solar World Congress 2011 : Kassel, Germany, 28 August - 2 September 2011. Vol. 5 Y1 - 2012 SP - 3887 EP - 3894 PB - Curran CY - Red Hook, NY ER - TY - CHAP A1 - Schwager, Christian A1 - Teixeira Boura, Cristiano José A1 - Flesch, Robert A1 - Alexopoulos, Spiros A1 - Herrmann, Ulf T1 - Improved efficiency prediction of a molten salt receiver based on dynamic cloud passage simulation T2 - AIP Conference Proceedings Y1 - 2019 SN - 978-0-7354-1866-0 U6 - http://dx.doi.org/10.1063/1.5117566 VL - 2126 IS - 1 SP - 030054-1 EP - 030054-8 ER - TY - CHAP A1 - Schwager, Christian A1 - Angele, Florian A1 - Nouri, Bijan A1 - Schwarzbözl, Peter A1 - Teixeira Boura, Cristiano José A1 - Herrmann, Ulf T1 - Impact of DNI forecast quality on performance prediction for a commercial scale solar tower: Application of nowcasting DNI maps to dynamic solar tower simulation T2 - SolarPACES conference proceedings N2 - 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. KW - Process prediction KW - DNI forecasting KW - Nowcasting KW - Uncertainty analysis KW - Molten salt receiver system, Y1 - 2024 U6 - http://dx.doi.org/10.52825/solarpaces.v1i.675 SN - 2751-9899 (online) N1 - 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA IS - Vol. 1 PB - TIB Open Publishing CY - Hannover ER - TY - CHAP A1 - Groß, Rolf Fritz A1 - Hecken, M. A1 - Renz, Ulrich ED - Dittler, A. ED - Hemmer, G. ED - Kasper, G. T1 - Hot gas filtration with ceramic filter candles: experimental and numerical investigations on fluid flow during element cleaning T2 - High temperature gas cleaning. Vol. 2 N2 - Ceramic hot gas filters are widely used in combined cycles based on pressurised fluidised beds. They fulfil most of the demands with respect to cleaning efficiency and long time durability, but their operation regarding the consumption of pulse gas and energy still has to be optimised. Experimental investigations were carried out to measure the flow field, the pressure and the gas temperature inside the filter candle during pulse jet cleaning. These results are compared with the results of a numerical procedure based on a solution of the two - dimensional conservation equations for momentum and energy. The observed difficulties handling different flow regimes like highly turbulent flow as well as Darcy flow simultaneously are discussed. KW - 20 fossil-fueled power plants KW - hot gas cleanup KW - ceramics KW - filtration KW - gas flow Y1 - 1999 SN - 3-9805220-1-6 N1 - 4th International Symposium and Exhibition on Gas Cleaning at High Temperatures, 22.-24.09.1999, Karlsruhe SP - 862 EP - 873 PB - KIT Institut für Mechanische Verfahrenstechnik und Mechanik CY - Karlsruhe ER - TY - JOUR A1 - Herrmann, Ulf A1 - Schwarzenbart, Marc A1 - Dittmann-Gabriel, Sören A1 - May, Martin T1 - Hochtemperatur-Wärmespeicher für die Strom- und Wärmewende JF - Solarzeitalter : Politik, Kultur und Ökonomie erneuerbarer Energien Y1 - 2019 SN - 0937-3802 VL - 31 IS - 2 SP - 18 EP - 23 ER - TY - JOUR A1 - Kronhardt, Valentina A1 - Alexopoulos, Spiros A1 - Reißel, Martin A1 - Sattler, Johannes, Christoph A1 - Hoffschmidt, Bernhard A1 - Hänel, Matthias A1 - Doerbeck, Till T1 - High-temperature thermal storage system for solar tower power plants with open-volumetric air receiver simulation and energy balancing of a discretized model JF - Energy procedia N2 - This paper describes the modeling of a high-temperature storage system for an existing solar tower power plant with open volumetric receiver technology, which uses air as heat transfer medium (HTF). The storage system model has been developed in the simulation environment Matlab/Simulink®. The storage type under investigation is a packed bed thermal energy storage system which has the characteristics of a regenerator. Thermal energy can be stored and discharged as required via the HTF air. The air mass flow distribution is controlled by valves, and the mass flow by two blowers. The thermal storage operation strategy has a direct and significant impact on the energetic and economic efficiency of the solar tower power plants. Y1 - 2014 U6 - http://dx.doi.org/10.1016/j.egypro.2014.03.094 SN - 1876-6102 (E-Journal) ; 1876-6102 (Print) VL - 49 SP - 870 EP - 877 PB - Elsevier CY - Amsterdam ER -