@techreport{AdamDreherEblingetal.2017, author = {Adam, Mario and Dreher, Martina and Ebling, Dirk and Knopp, Reinhold and Neef, Matthias and Niess, Robert and Pohl, Tobias and Stahl, Wilhelm and van Rießen, Anne and Waldow, Friederike and Weber, Konradin and Weis, Stephanie}, title = {LUST Forschungsprojekt - lebenswerte und umweltgerechte Stadt}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, isbn = {978-3-941334-43-4}, doi = {10.20385/978-3-941334-43-4}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-11458}, year = {2017}, abstract = {LUST (lebenswerte und umweltgerechte Stadt) ist ein interdisziplin{\"a}res Projekt der Fachbereiche Architektur, Maschinenbau und Verfahrenstechnik sowie Kultur- und Sozialwissenschaften der Hochschule D{\"u}sseldorf. Mittelpunkt des Projektes ist die fach{\"u}bergreifende Entwicklung neuer Konzepte f{\"u}r eine lebenswerte und umweltgerechte Stadt. Es wurde gef{\"o}rdert vom Land Nordrhein-Westfalen im Rahmen des Programms „FH Struktur".}, language = {de} } @article{BonkLauxRoedderetal.2017, author = {Bonk, Christian Dirk and Laux, Christoph and R{\"o}dder, Maximilian and Neef, Matthias}, title = {Design of a 1 KW Organic Rankine Cycle for Teaching and Research Issues}, series = {Energy Procedia}, volume = {129}, journal = {Energy Procedia}, publisher = {Elsevier}, doi = {10.1016/j.egypro.2017.09.117}, pages = {931 -- 938}, year = {2017}, abstract = {This paper deals with the design of a micro-scale ORC plant for teaching and research including the development of an automated control concept. The aim is to provide a safe and environmentally acceptable micro-scale heat engine, which can be developed, implemented and used in university labs for the education of students as well as for small research projects. The test rig allows the support of several learning outcomes on a multi-disciplinary level particularly for the implementation and simulation of small power systems. Special attention was given to the organic working fluid characteristics and its selection process. In addition to the above-mentioned performance goals, favourable safety properties and low global warming potential were decisive in the selection of the novel organic fluid called 3M™ Novec™ 649. The performance and the fluid behaviour of Novec 649 in a micro-scale power cycle are of major interest and the research goal for the test rig presented in this paper. Due to the expected power output of 1 kW, a scroll expander was chosen as the generator drive for the micro plant. In order to design the major parts of the ORC, the thermodynamic simulation software EBSILON®Professional was used. The supply temperature was set to 140 °C. As a result of the simulation, feasible expander inlet pressures spread from 5.5 bar to 8.5 bar. This leads to thermal efficiencies of the ORC in the order of 5 \%. Adding a recuperator to the cycle system decreases the operating pressure range but in the end, the thermal efficiency can be increased by 1.5 \%-points up to 6.2 \%. Finally, an automated control concept is introduced, where the pump is controlled via the fill level measurement system.}, language = {en} } @article{NeefZielkeFussenecker2017, author = {Neef, Matthias and Zielke, Thomas and Fussenecker, Claudia}, title = {„Engineering Conferences": Wissenschaftlich Kommunizieren im Master}, series = {Die Neue Hochschule}, volume = {58}, journal = {Die Neue Hochschule}, number = {3}, pages = {4}, year = {2017}, language = {de} } @inproceedings{FesekerKinellNeef2017, author = {Feseker, Daniel and Kinell, Mats and Neef, Matthias}, title = {Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow}, series = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2017: presented at the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition, June 26-30, 2017}, booktitle = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2017: presented at the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition, June 26-30, 2017}, editor = {The American Society of Mechanical Engineers,}, publisher = {The American Society of Mechanical Engineers}, address = {New York}, isbn = {978-0-7918-5088-6}, doi = {10.1115/GT2017-64143}, year = {2017}, abstract = {The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54\%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties.}, language = {en} } @inproceedings{FrankRoedderNeefetal.2017, 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 = {Deutsche K{\"a}lte- und Klimatagung 2017 Bremen}, booktitle = {Deutsche K{\"a}lte- und Klimatagung 2017 Bremen}, address = {Stuttgart}, isbn = {9783932715938}, pages = {1028 -- 1041}, year = {2017}, language = {de} } @incollection{NeefZielkeFussenecker2017, author = {Neef, Matthias and Zielke, Thomas and Fussenecker, Claudia}, title = {Engineering Conferences - An Innovative Course for Master Students in Engineering}, series = {Exploring Teaching for Active Learning in Engineering Education}, booktitle = {Exploring Teaching for Active Learning in Engineering Education}, editor = {Danish Network for Engineering Education,}, publisher = {Danish Network for Engineering Education (IUPN)}, address = {Odense}, isbn = {978-87-998898-1-5}, year = {2017}, abstract = {This poster summarizes a few facts, figures and resources related to the Master course "Engineering Conferences".}, language = {en} } @incollection{NeefZielkeFussenecker2017, author = {Neef, Matthias and Zielke, Thomas and Fussenecker, Claudia}, title = {Engineering Conferences - An Innovative Course for Master Students in Engineering}, series = {Exploring Teaching for Active Learning in Engineering Education}, booktitle = {Exploring Teaching for Active Learning in Engineering Education}, editor = {Danish Network for Engineering Education,}, address = {Odense}, organization = {Danish Network for Engineering Education (IUPN)}, isbn = {978-87-998898-1-5}, pages = {13 -- 24}, year = {2017}, abstract = {A course called "Engineering Conferences" is presented that the authors have developed and installed as a mandatory part of the curriculum in Master programs for engineering students. The idea is to go beyond teaching the standards of academic writing and skills for working with scientific publications. By using a learner-centered approach, we get the students engaged in typical activities around an active attendance of a real conference. They write a paper complying with common academic standards, submit the paper and review submissions of their fellow students. Students also produce a poster and have to defend it in a poster session held publicly on campus. In this article, we present our rationale to develop the course and our results from the first semester teaching this course. This includes the presentation of useful resources for teaching and organizing scientific publishing as well as our reflected learning experience regarding the student's understanding of significance for scientific publishing.}, language = {en} } @inproceedings{ZielkeNeefFussenecker2017, author = {Zielke, Thomas and Neef, Matthias and Fussenecker, Claudia}, title = {Teaching Engineering Conferences}, series = {Proceedings of the Canadian Engineering Education Association (CEEA) Conference}, booktitle = {Proceedings of the Canadian Engineering Education Association (CEEA) Conference}, address = {Winnipeg}, organization = {Canadian Engineering Education Association (CEEA)}, year = {2017}, abstract = {This article is on a university course called Engineering Conferences. It has been developed by the authors and installed as a mandatory part of the curriculum in three master's degree programs for engineering students. The participants of the course are postgraduates with different nationalities, mostly German, and different technical backgrounds. They study Mechanical Engineering, Simulation and Experimental Technology, or International Business Engineering. The basic idea of the course concept goes far beyond simply teaching the standards of academic writing and skills for using scientific publications. By using a learnercentered approach, the students get engaged in typical activities around an active attendance of a real conference. Students learn to locate the field of their bachelor thesis or project report in the world of research communities, scientific journals and engineering conferences. They learn about conferences matching their bachelor/project topic. They write a paper complying with common academic standards, submit it to a mock-up conference, and review submissions of their fellow students. Students also produce a poster and have to defend it in a poster session held publicly on the campus. Engineering Conferences is a course on scientific communication and presentation that also aims at the development of other skills and competences needed in the world of modern engineering.}, language = {en} } @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} }