@inproceedings{JaegerHartRegueraetal.2024, author = {J{\"a}ger, Lukas and Hart, Scott and Reguera, Remo and Grote-Ramm, Wolfgang and Neef, Matthias}, title = {Autonome Nachf{\"u}hrungssteuerung eines Parabolrinnen-Teststands mittels Microcontroller}, series = {Beitrag zur 7. Regenerativen Energietechnik Konferenz, Nordhausen, 08. - 09. Februar 2024}, booktitle = {Beitrag zur 7. Regenerativen Energietechnik Konferenz, Nordhausen, 08. - 09. Februar 2024}, address = {Nordhausen}, pages = {8}, year = {2024}, abstract = {Parabolrinnen nutzen parabolisch gekr{\"u}mmte Spiegel, um die direkte Globalstrahlung auf ein Vakuum-Absorberrohr zu konzentrieren. Eine Effizienzsteigerung dieser Technologie wird durch eine vollst{\"a}ndige Automatisierung der Sonnennachf{\"u}hrung optimiert. Die an einem Parabolrinnen-Versuchstr{\"a}ger der Hochschule D{\"u}sseldorf realisierte Steuerung und Berechnung der Nachf{\"u}hrung werden kontinuierlich {\"u}ber einen Microcontroller realisiert. Eine Kalibrierung der Parabolrinne im Labormaßstab zur Erkennung des Winkels erfolgt {\"u}ber Infrarotsensoren. Die Berechnung des Sonnenstandes, durch den Algorithmus, kann unabh{\"a}ngig von einer Stromzufuhr durch eine Real-Time-Clock bestimmt werden. Mittels Schrittmotor und Treiber verf{\"a}hrt die Parabolrinne in die errechnete Position. Die Feinausrichtung der Parabolrinne erfolgt {\"u}ber ein Verschattungsmodul und zwei Photowiderst{\"a}nde. Durch den Einsatz von 3D-gedruckten Bestandteilen sind die genutzten Komponenten kosteng{\"u}nstig und k{\"o}nnen standortunabh{\"a}ngig reproduziert werden. Durch das Zusammenspiel der Komponenten ist ein autonomer Einsatz m{\"o}glich.}, language = {de} } @article{LauxGotterEckertetal.2022, author = {Laux, Christoph and Gotter, Andreas and Eckert, Frank and Neef, Matthias}, title = {Experimental results of a low-pressure steam Rankine cycle with a novel water lubricated radial inflow turbine for the waste heat utilization of internal combustion engines}, series = {Energy Conversion and Management}, volume = {271}, journal = {Energy Conversion and Management}, publisher = {Elsevier}, issn = {0196-8904}, doi = {10.1016/j.enconman.2022.116265}, year = {2022}, language = {en} } @misc{FrankRoedderNeefetal.2018, author = {Frank, Lena and R{\"o}dder, Maximilian and Neef, Matthias and Adam, Mario}, title = {Heizung, L{\"u}ftung, Weiße Ware - Ein integriertes Systemkonzept f{\"u}r das Haus der Zukunft}, series = {KKA - K{\"a}lte Klima Aktuell}, volume = {37}, journal = {KKA - K{\"a}lte Klima Aktuell}, number = {4}, publisher = {Bauverl. BV}, issn = {0722-4605}, pages = {42 -- 47}, year = {2018}, language = {de} } @misc{FrankRoedderNeefetal.2020, author = {Frank, Lena and R{\"o}dder, Maximilian and Neef, Matthias and Adam, Mario}, title = {energiBUS4home - Integration von Haushaltsger{\"a}ten in ein multifunktionales W{\"a}rmepumpensystem}, series = {KI K{\"a}lte Luft Klimatechnik}, volume = {56}, journal = {KI K{\"a}lte Luft Klimatechnik}, number = {8/9}, publisher = {H{\"u}thig}, issn = {1865-5432}, pages = {41 -- 45}, year = {2020}, language = {de} } @inproceedings{RoedderFrankKirschneretal.2017, author = {R{\"o}dder, Maximilian and Frank, Lena and Kirschner, Daniel and Neef, Matthias and Adam, Mario}, title = {EnergiBUS4home - Sustainable energy resourcing in low-energy buildings}, series = {12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik}, booktitle = {12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik}, editor = {The International Centre for Sustainable Development of Energy, Water and Environment Systems,}, year = {2017}, language = {en} } @article{FrankRoedderNeefetal.2021, author = {Frank, Lena and R{\"o}dder, Maximilian and Neef, Matthias and Adam, Mario}, title = {Heating, Ventilation, Domestic Appliances - an Energy Integrated System Concept for the Household of the Future}, series = {Energy}, volume = {234}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2021.121303}, year = {2021}, language = {en} } @article{RoedderFrankKirschneretal.2018, author = {R{\"o}dder, Maximilian and Frank, Lena and Kirschner, Daniel and Neef, Matthias and Adam, Mario}, title = {EnergiBUS4home - Sustainable energy resourcing in low-energy buildings}, series = {Energy}, volume = {159}, journal = {Energy}, publisher = {Elsevier}, doi = {10.1016/j.energy.2018.06.145}, pages = {638 -- 647}, year = {2018}, language = {en} } @inproceedings{NeefHummel2000, author = {Neef, Matthias and Hummel, Dietrich}, title = {Euler solutions for a finite-span flapping wing}, series = {"Fixed, flapping and rotary wing vehicles at very low Reynolds numbers, Notre Dame, Indiana, USA}, booktitle = {"Fixed, flapping and rotary wing vehicles at very low Reynolds numbers, Notre Dame, Indiana, USA}, year = {2000}, language = {en} } @inproceedings{NeefHepermannSuerkenetal.2007, author = {Neef, Matthias and Hepermann, Florian and S{\"u}rken, Norbert and Schettel, Joachim}, title = {Brush Seal Porosity Modeling: Applicability and Limitations}, series = {ETC7 - 7th Conference on Turbomachinery, Athens}, booktitle = {ETC7 - 7th Conference on Turbomachinery, Athens}, address = {Athens}, year = {2007}, language = {en} } @inproceedings{HelmSpliethoffNeef2007, author = {Helm, Peter and Spliethoff, Hartmut and Neef, Matthias}, title = {Closing the Gap: Measuring Bristle Blow Down of Brush Seals}, series = {19 th International Conference on Fluid Sealing, Poitiers}, booktitle = {19 th International Conference on Fluid Sealing, Poitiers}, address = {Poitiers}, year = {2007}, language = {en} }