TY - GEN ED - Azarmi, Fardad ID - 24103 SN - 9781510888005 TI - Adhesion of HVOF sprayed WC-Co coatings on additively processed 316L ER - TY - JOUR AU - Inguva, Venkatesh AU - Graceffa, Rita AU - Schulz, Joachim AU - Bilsel, Osman AU - Perot, Blair J. ID - 24122 JF - Journal of Mechanical Science and Technology SN - 1738-494X TI - Creating round focused micro-jets from rectangular nozzles ER - TY - CONF AU - König, Jonas AU - Malberg, Simon AU - Martens, Martin AU - Niehaus, Sebastian AU - Krohn-Grimberghe, Artus AU - Ramaswamy, Arunselvan ID - 24141 T2 - Science and Information Conference TI - Multi-stage reinforcement learning for object detection ER - TY - JOUR AU - Knoke, Torben AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Kenig, Eugeny ID - 24272 IS - 5 JF - Applied Thermal Engineering SN - 1359-4311 TI - On the design of heat exchanger equipment for novel-type isobaric expansion engines VL - 167 ER - TY - CONF AU - Malatyali, Hatice AU - Schöppner, Volker ID - 24319 T2 - 27. Fachtagung Technomer TI - Untersuchung des Dosierverhaltens von Carbonfaserrezyklaten für den Einsatz im gleichläufigen Doppel-schneckenextruder ER - TY - CONF AU - Malatyali, Hatice AU - Schöppner, Volker AU - Tillmann, Wolfgang AU - Kokalj, David ID - 24322 T2 - SPE ANTEC TI - Deveploment of thin film sensors: The influence of layer variation on the measurement quality for inline melt temperature measurements ER - TY - CONF AU - Vogtschmidt, Sascha AU - Schöppner, Volker ID - 24326 TI - Vibration welding of components with angled areas in the direction of vibration ER - TY - CONF AB - Liquid atomization is expected to be a key process in Flame Spray Pyrolysis, as it determines the primary droplet size and velocity distribution, which represent initial conditions for flame shape and temperature field. A well-defined manipulation of atomization may be achieved by variation of nozzle geometry, injection parameter or fluid properties. However, change of fluid properties, e.g. varying solvents or increasing the precursor concentration, also influences the final particle properties. In this work, the influence of precursor concentration on fluid properties, spray and particle formation in Flame Spray Pyrolysis is experimentally investigated. High-speed shadowgraphy and Phase-Doppler measurements are conducted in a semi-closed combustion chamber with a well-defined burner geometry (SpraySyn burner) that is based on a coaxial atomization principle. By adding precursor to the flammable solvent, resulting spray characteristics, flame shape and appearance are changed in color, shape and mean droplet size distribution. Compared to resulting mean droplet sizes of pure solvent mixtures (D32, 22 μm), mean droplet sizes in the center of the precursor flame at 30 mm above the burner are generally smaller (D32, 18 μm). Persisting high share of small droplets in the droplet size distribution are presented, that presumably origin from an accumulation of metal organic precursor at the droplet surface during combustion, that acts as a diffusive barrier for high volatility solvent and thus reduces droplet evaporation. Sufficiently high above the nozzle exit, increasing the precursor concentration does not affect the radial distribution of mean droplet sizes but leads to increased mean particle sizes. More precursor presumably leads to higher concentrations of prime particles in the flame, thus probability of particle collusion and agglomeration. High-speed imaging at nozzle exit revealed random fluctuations of initial jet diameter, paired with jet axis shifting around 1000 Hz. These superposed fluctuations determine the initial conditions for atomization, induce pulsations in the flame and thus initiate the entire chain of the particle synthesis process. AU - Bieber, M. AU - Tischendorf, R. AU - Reddemann, M. AU - Schmid, H.-J. AU - Kneer, R. ID - 24502 KW - FSP KW - nanoparticle synthesis KW - in situ measurements TI - Influence of precursor concentration on spray and particle formation in flame spray pyrolysis ER - TY - GEN AU - Menge, Dennis AU - Walter, Rolf AU - Schmid, Hans-Joachim AU - Breuer, Ulf Paul ID - 24628 TI - FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen VL - 1338 ER - TY - JOUR AB - Prerequisite for an efficient cooling energy system is the knowledge and optimal combination of different operating conditions of individual compression and free cooling chillers. The performance of cooling systems depends on their part-load performance and their condensing temperature, which are often not continuously measured. Recorded energy data remain unused, and manufacturers’ data differ from the real performance. For this purpose, manufacturer and real data are combined and continuously adapted to form part-load chiller models. This study applied a predictive optimization algorithm to calculate the optimal operating conditions of multiple chillers. A sprinkler tank offers the opportunity to store cold-water for later utilization. This potential is used to show the load shifting potential of the cooling system by using a variable electricity price as an input variable to the optimization. The set points from the optimization have been continuously adjusted throughout a dynamic simulation. A case study of a plastic processing company evaluates different scenarios against the status quo. Applying an optimal chiller sequencing and charging strategy of a sprinkler tank leads to electrical energy savings of up to 43%. Purchasing electricity on the EPEX SPOT market leads to additional costs savings of up to 17%. The total energy savings highly depend on the weather conditions and the prediction horizon. AU - Peesel, Ron-Hendrik AU - Schlosser, Florian AU - Meschede, Henning AU - Dunkelberg, Heiko AU - Walmsley, Timothy ID - 24632 JF - Energies SN - 1996-1073 TI - Optimization of Cooling Utility System with Continuous Self-Learning Performance Models ER -