TY - JOUR A1 - Herzog, Thomas H. A1 - Jänchen, Jochen T1 - Adsorption Properties of Modified Zeolites for Operating Range Enhancement of Adsorption Heat Pumps through the Use of Organic Adsorptive Agents JF - Energy Procedia N2 - Faujasite zeolites with the highest possible Al-content and different cations as well as a dealuminated zeolite Y have been chosen to study the impact on the adsorption behavior in view of differed adsorptive agents for heat pumps or thermochemical storages. Our results show advantages and disadvantages for water, methanol or ethanol adsorption due to the structure of the anion skeleton, kind of cations and size of the adsorbat molecule. KW - heat pump KW - water adsorption KW - zeolites KW - ethanol KW - methanol Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-6614 SN - 1876-6102 VL - 91 SP - 155 EP - 160 ER - TY - JOUR A1 - Ristić, Alenka A1 - Furbo, Simon A1 - Moser, Christoph A1 - Schranzhofer, Hermann A1 - Lazaro, Ana A1 - Delgado, Monica A1 - Peñalosa, Conchita A1 - Zalewski, Laurent A1 - Diarce, Gonzalo A1 - Alkan, Cemil A1 - Gunasekara, Saman N. A1 - Haussmann, Thomas A1 - Gschwander, Stefan A1 - Rathgeber, Christoph A1 - Schmit, Henri A1 - Barreneche, Camila A1 - Cabeza, Luiza A1 - Ferrer, Gerard A1 - Konuklu, Yeliz A1 - Paksoy, Halime A1 - Rammelberg, Holger A1 - Munz, Gunther A1 - Herzog, Thomas H. A1 - Jänchen, Jochen A1 - del Barrio, Elena Palomo T1 - IEA SHC Task 42 / ECES Annex 29 WG A1: Engineering and Processing of PCMs, TCMs and Sorption Materials JF - Energy Procedia N2 - An overview on the recent results on the engineering and characterization of sorption materials, PCMs and TCMs investigated in the working group WG A1 “Engineering and processing of TES materials” of IEA SHC Task 42 / ECES Annex 29 (Task 4229) entitled “Compact Thermal Energy Storage” is presented. KW - engineering KW - processing KW - PCM KW - TCM KW - sorption materials Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-6629 SN - 1876-6102 VL - 91 SP - 207 EP - 217 ER - TY - GEN A1 - Bräske, Jörn A1 - Klohs, Steffen A1 - Mirre, Thomas T1 - Untersuchung zum Ausfall der Strangführungsrollen in der horizontalen Zone einer Brammenstranggussanlage T2 - Wissenschaftliche Beiträge 2016 N2 - Es besteht ein Problem durch den häufigen Ausfall der Strangführungsrollen und die resultierenden erheblichen Verluste durch den Produktionsausfall, welcher beim Ersetzen der Rolleneinheiten entsteht. Um die Ursachen zu ergründen wurden, zunächst die Randbedingungen und das Schadensbild analysiert. Daraus entstand die Hypothese, dass allgemein eine zu hohe Temperaturbelastung für die Schädigung der Lagerkomponenten verantwortlich ist und dies die grundlegende Ursache für die weitere Zerstörung darstellt. Folglich musste eine Messeinrichtung installiert werden, um genauere Erkenntnisse über den Überhitzungsvorgang zu erlangen. Zu diesem Zweck wurden mehrere Verfahren zur Temperaturmessung miteinander verglichen, woraufhin eine Auswahl anhand einer Nutzwertanalyse erfolgte. Die Auswertung der gewonnenen Messdaten zeigte, dass die Charakteristik der aufgezeichneten Überhitzungen sehr variabel ist. Weiterhin konnte keine Abhängigkeit von einem Prozessparameter ermittelt werden. Die genauer betrachteten Vorgänge konnten nicht oder nur eingeschränkt als Ursache für die Überhitzung nachgewiesen werden. Wenngleich somit weitere Untersuchungen erforderlich sind, wurden mögliche Maßnahmen zur Lösung des Problems vorgeschlagen. N2 - The problem deals with the frequent malfunction of the guide rolls and the following serious loss through the lost output, which develops because of the replacement of the rolls. First of all, the boundary conditions and the failure mode were analyzed to fathom the possible causes. Hence, the assumption arose that the general reason for the damage of the bearing components is that the temperature stress is too high, which is the reason for the further destruction. Consequently, a system of measurements has to be installed to get detailed insights about overheating. For this purpose, different methods of temperature detections were compared, whereupon a choice occurred on the basis of a utility analysis. The evaluation of the achieved measurement data showed that the characteristic of the recorded overheating is very different. Furthermore, a dependence on a process parameter cannot be proved. It was not possible, or just restricted, to verify the eyed instances as a cause of the high temperature. Although more researches are necessary, possible actions to solve the problem were proposed. Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-5346 SN - 0949-8214 VL - 20 SP - 49 EP - 58 ER - TY - JOUR A1 - Klingsporn, M. A1 - Kirner, S. A1 - Villringer, Claus A1 - Abou-Ras, D. A1 - Costina, I. A1 - Lehmann, M. A1 - Stannowski, B. T1 - Resolving the nanostructure of plasma-enhanced chemical vapor deposited nanocrystalline SiOx layers for application in solar cells JF - Journal of Applied Physics N2 - Nanocrystalline silicon suboxides (nc-SiOx) have attracted attention during the past years for the use in thin-film silicon solar cells. We investigated the relationships between the nanostructure as well as the chemical, electrical, and optical properties of phosphorous, doped, nc-SiO0.8:H fabricated by plasma-enhanced chemical vapor deposition. The nanostructure was varied through the sample series by changing the deposition pressure from 533 to 1067 Pa. The samples were then characterized by X-ray photoelectron spectroscopy, spectroscopic ellipsometry, Raman spectroscopy, aberration-corrected high-resolution transmission electron microscopy, selected-area electron diffraction, and a specialized plasmon imaging method. We found that the material changed with increasing pressure from predominantly amorphous silicon monoxide to silicon dioxide containing nanocrystalline silicon. The nanostructure changed from amorphous silicon filaments to nanocrystalline silicon filaments, which were found to cause anisotropic electron transport. Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-9727 SN - 1089-7550 VL - 119 IS - 22 ER - TY - CHAP A1 - Steglich, Patrick A1 - Mai, Christian A1 - Stolarek, David A1 - Lischke, Stefan A1 - Kupijai, Sebastian A1 - Villringer, Claus A1 - Pulwer, Silvio A1 - Heinrich, Friedhelm A1 - Bauer, Joachim A1 - Meister, Stefan A1 - Knoll, Dieter A1 - Casalboni, Mauro A1 - Schrader, Sigurd T1 - Partially slotted silicon ring resonator covered with electro-optical polymer T2 - Proceedings of SPIE N2 - In this work, we present for the first time a partially slotted silicon ring resonator (PSRR) covered with an electro-optical polymer (Poly[(methyl methacrylate)-co-(Disperse Red 1 acrylate)]). The PSRR takes advantage of both a highly efficient vertical slot waveguide based phase shifter and a low loss strip waveguide in a single ring. The device is realized on 200 mm silicon-on-insulator wafers using 248 nm DUV lithography and covered with the electro-optic polymer in a post process. This silicon-organic hybrid ring resonator has a small footprint, high optical quality factor, and high DC device tunability. A quality factor of up to 105 and a DC device tunability of about 700 pm/V is experimentally demonstrated in the wavelength range of 1540 nm to 1590 nm. Further, we compare our results with state-of-the-art silicon-organic hybrid devices by determining the poling efficiency. It is demonstrated that the active PSRR is a promising candidate for efficient optical switches and tunable filters. Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-13771 SN - 1996-756X ER -