@article{ChatzitakisSafarovOpferkuchetal., author = {Chatzitakis, Paris and Safarov, Javid and Opferkuch, Frank and Dawoud, Belal}, title = {Experimental investigation of an absorption heat pump with organic working pairs}, series = {Applied Thermal Engineering}, volume = {163}, journal = {Applied Thermal Engineering}, number = {December}, publisher = {Elsevier}, doi = {10.1016/j.applthermaleng.2019.114311}, abstract = {As part of a systematic approach towards the search for alternative absorption heat pump (AHP) working pairs that could potentially provide comparable performance to conventional ones, a previous work performed a detailed theoretical cycle analysis and simulation that revealed concrete correlations between key working fluid thermophysical properties and AHP performance indicators. Following this work, targeted combinations of two organic refrigerants, 2,2,2-trifluoroethanol (TFE) and 2,2,3,3,3-pentafluoropropanol (5FP) and two organic absorbents, 1,3-dimethyl-2-imidazolidinone (DMI) and 2-pyrrolidone (PYR) were tested in a prototype 5 kW AHP, based on a highly compact plate heat exchanger design, which has been previously introduced. The purpose of this effort was to test the findings of the previous work with experimental measurements. The working pair combinations were also subjected to vapor liquid equilibrium (VLE) and viscosity measurements, in order to determine reliable activity coefficient and improve the accuracy of the simulations. The experimental performance data agree well with the COP simulations and show to be consistent with the conclusions derived from the previous theoretical work.}, language = {en} } @article{HansenHoeblerPurretal., author = {Hansen, B. and Hoebler, Michael and Purr, Stephan and Meinhardt, J. and Merklein, Marion}, title = {Basics for inline measurement of tribological conditions in series production of car body parts}, series = {IOP Conference Series: Materials Science and Engineering}, volume = {651}, journal = {IOP Conference Series: Materials Science and Engineering}, publisher = {IOP Publishing}, doi = {10.1088/1757-899x/651/1/012050}, abstract = {The quality of car body parts in series production is strongly dependent on the tribological behavior. Fluctuating material properties such as the sheet roughness and the amount of lubricant have an influence on the forming process. On the basis of large amounts of data it is possible to investigate the friction behavior in series production and to make process adjustments if required. Therefore, inline measurement systems have a great potential to detect the sheet roughness during the cutting process of blanks in the coil line. Furthermore, contactless systems are advantageous as they do not damage the surface. Nevertheless, the optical measuring is influenced by the lubricant layer on top of the surface. Therefore, the previously unknown impact of the lubricant on the measuring result is investigated. Within this study, stationary optical roughness measurements have been conducted using different amounts of lubricant on hot-dip galvanized EDT steel. The results demonstrate the influence of different amounts of lubricant on the sheet roughness measurement. Hence, it is possible to correct the inline measuring results and gain knowledge of fluctuating surface roughness. In addition, strip drawing test has been carried out to investigate the effect of fluctuating tribological conditions.}, language = {en} } @article{SavelevFetisovChashinetal., author = {Savelev, Dmitrii V. and Fetisov, Leonid Y. and Chashin, Dmitri V. and Shabin, P. A. and Vyunik, D. A. and Fedulov, Feodor and Kettl, Wolfgang and Shamonin (Chamonine), Mikhail}, title = {Method of Measuring Deformations of Magnetoactive Elastomers under the Action of Magnetic Fields}, series = {Russian Technological Journal}, volume = {7}, journal = {Russian Technological Journal}, number = {4}, doi = {10.32362/2500-316x-2019-7-4-81-91}, pages = {81 -- 91}, language = {ru} } @inproceedings{ParedesKeimNonnetal., author = {Paredes, Marcelo and Keim, Vincent and Nonn, Aida and Wierzbicki, Tomasz}, title = {Effect of plasticity parameter on the crack propagation in steel pipelines}, series = {Proceedings of the conference on Technology for future and ageing piplines, Ghent, Belgium}, booktitle = {Proceedings of the conference on Technology for future and ageing piplines, Ghent, Belgium}, language = {en} } @article{DiamantidisSykoraLenzi, author = {Diamantidis, Dimitris and S{\´y}kora, Miroslav and Lenzi, Daniele}, title = {Optimising Monitoring: Standards, Reliability Basis and Application to Assessment of Roof Snow Load Risks}, series = {Structural Engineering International}, volume = {28}, journal = {Structural Engineering International}, number = {3}, publisher = {Taylor\&Francis}, doi = {10.1080/10168664.2018.1462131}, pages = {269 -- 279}, abstract = {This paper addresses the optimisation of monitoring and decision-making criteria regarding the future use of structures. The current state of practice in standards and reliability framework are initially summarised. A general methodology for obtaining cost-optimal decisions is then presented on the basis of limit state design, probabilistic reliability analysis and cost estimates. The implementation of the risk-based approach is illustrated in a case study dealing with the roof of a stadium located in northern Italy. As the roof fails to comply with the requirements of the Eurocodes, the installation of a permanent monitoring system is recommended to allow for a real-time reliability assessment. The results demonstrate the potential of monitoring systems and probabilistic reliability analysis for supporting decisions regarding safety measures such as snow removal or temporary closure of the stadium, as well as reflecting the need to implement the discussed procedures in future standards.}, language = {en} } @article{DiermeierSindersbergerKrenkeletal., author = {Diermeier, Andreas and Sindersberger, Dirk and Krenkel, Lars and Rosell, X. C. and Monkman, Gareth J.}, title = {Controllable Magnetoactive Polymer Conduit}, series = {The Open Mechanical Engineering Journal}, volume = {12}, journal = {The Open Mechanical Engineering Journal}, number = {1}, publisher = {Bentham}, pages = {192 -- 200}, abstract = {Objective: Magneto-active Polymers (MAP) are smart materials whose mechanical characteristics, such as elastic and shear moduli, may be controllable by means of an externally applied magnetic field. Methods: Various additives may be used to influence the characteristics of the polymer matrix whilst a suspension of soft and/or hard magnetic particles determine the magnetic properties of the composite. Both pre-cure and post-cure magnetization is possible. Results: A range of control strategies have been investigated for evaluation of the system using fluids of differing kinematic viscosity. Conclusion: Depending on the degree of magnetic field homogeneity, magneto-deformation and magnetostriction contribute to MAP actuation. This paper presents a novel application in the form of a peristaltic MAP tube system, applicable to flow control and pumping of hemorheological fluids in blood circulatory systems for biomedical research purposes.}, language = {en} } @article{Brueckl, author = {Br{\"u}ckl, Oliver}, title = {Pl{\"a}doyer f{\"u}r die wettbewerbliche Bereitstellung von Blindleistung}, series = {ew - Magazin f{\"u}r die Energiewirtschaft - Spezial: Digitalisierung}, volume = {117}, journal = {ew - Magazin f{\"u}r die Energiewirtschaft - Spezial: Digitalisierung}, number = {1}, publisher = {VDE Verlag}, organization = {VDE Verlag}, pages = {46 -- 48}, language = {de} } @inproceedings{HaslbeckBrueckl, author = {Haslbeck, Matthias and Br{\"u}ckl, Oliver}, title = {Netzplanungsprozess zur dezentralen Nutzung von Blindleistungsquellen in Verteilungsnetzen}, series = {Tagungsband der Fachtagung "Zuk{\"u}nftige Stromnetze f{\"u}r erneuerbare Energien" am 30./31. Januar 2018 in Berlin}, booktitle = {Tagungsband der Fachtagung "Zuk{\"u}nftige Stromnetze f{\"u}r erneuerbare Energien" am 30./31. Januar 2018 in Berlin}, abstract = {Das vom BMWi gef{\"o}rderte Forschungsprojekt SyNErgie (03/2015 bis 05/2018) besch{\"a}ftigt sich mit der Weiterentwicklung von Netzplanungsprozessen [1]. Im Fokus steht dabei die Modellierung von Blindleistungsfl{\"u}ssen und die dezentrale Nutzung von Blindleistungsquellen (z. B. Wechselrichter, Ladedrosseln, Kondensatoren) in Mittelspannungsnetzen, {\"u}ber welche der Blindleistungshaushalt letztendlich beeinflusst werden soll. Diese Ver{\"o}ffentlichung konzentriert sich auf die konzipierte Erweiterung des Netzplanungsprozesses zur Einbindung von Blindleistungsquellen im Verteilungsnetz in ein Blindleistungsmanagement. Deren einzelne Phasen werden erl{\"a}utert und anschließend die Netz-Sensitivit{\"a}ts- und -Restriktionsanalyse anhand eines realen Mittelspannungsnetzes demonstriert. Abschließend werden m{\"o}gliche Abschw{\"a}chungs- und Verst{\"a}rkungseffekte im Hinblick auf einen Blindleistungsabruf {\"u}ber mehrere Spannungsebenen hinweg diskutiert.}, language = {de} } @inproceedings{KreuzerHaslbeckBrueckl, author = {Kreuzer, Reinhard and Haslbeck, Matthias and Br{\"u}ckl, Oliver}, title = {Modellierung von Mittelspannungsnetzen zur verbesserten Nachbildung von Wirk- und Blindleistungsfl{\"u}ssen}, series = {Tagungsband der Fachtagung "Zuk{\"u}nftige Stromnetze f{\"u}r erneuerbare Energien" am 30./31. Januar 2018 in Berlin}, booktitle = {Tagungsband der Fachtagung "Zuk{\"u}nftige Stromnetze f{\"u}r erneuerbare Energien" am 30./31. Januar 2018 in Berlin}, abstract = {Das vom BMWi gef{\"o}rderte Forschungsprojekt SyNErgie (03/2015 bis 05/2018) besch{\"a}ftigt sich mit der Weiterentwicklung von Netzplanungsprozessen [1]. Im Fokus steht dabei die Modellierung von Blindleistungsfl{\"u}ssen und die dezentrale Nutzung von Blindleistungsquellen (z. B. Wechselrichter, Ladedrosseln, Kondensatoren) in Mittelspannungsnetzen, {\"u}ber welche der Blindleistungshaushalt letztendlich beeinflusst werden soll. Im Rahmen dieses Beitrags wird anhand eines realen Mittelspannungsnetzes (MS-Netz) gezeigt, welche Modellierungsschritte zur Erstellung eines m{\"o}glichst realit{\"a}tsnahen Simulationsabbilds n{\"o}tig sind. Dies ist notwendig, um der Verteilnetzplanung eine robuste Planungsgrundlage f{\"u}r die Ableitung von Entscheidungen im Rahmen eines Blindleistungsmanagements zur Verf{\"u}gung zu stellen.}, language = {de} } @inproceedings{BerlingHaslbeckBrueckl, author = {Berling, Andreas and Haslbeck, Matthias and Br{\"u}ckl, Oliver}, title = {Interpretation und Relevanz verschiedener Blindleistungsarten f{\"u}r die Modellierung von Niederspannungsnetzen in der Netzplanung}, series = {Tagungsband der Fachtagung "Zuk{\"u}nftige Stromnetze f{\"u}r erneuerbare Energien" am 30./31. Januar 2018 in Berlin}, booktitle = {Tagungsband der Fachtagung "Zuk{\"u}nftige Stromnetze f{\"u}r erneuerbare Energien" am 30./31. Januar 2018 in Berlin}, language = {de} }