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Knieper A.,Wissenschaftliche Mitarbeiter | Spohr G.,Wissenschaftliche Mitarbeiter | Beinert C.,Fraunhofer Institute for Structural Durability and System Reliability
Gummi, Fasern, Kunststoffe | Year: 2013

A test stand to observe movement and deformation of thermoplastic polymers in a cross-section of the plastification zone of a co-rotating twin screw extruder is presented. Multiple experiments to examine the initial melting processes as a function of different process parameters such as rotational speed, temperature, kneading disk configuration, thermoplastic materials, granule size and filling degree were conducted. The analysis was accomplished by means of high-speed imaging. Hereby it was possible to gain insights into the significant influence parameters of the initial melting behaviour of thermoplastics during processing in a corotating twin screw extruder for the first time. Source


Asegehegn T.W.,Wissenschaftliche Mitarbeiter | Lechner S.,Wissenschaftliche Mitarbeiter | Merzsch M.,Wissenschaftliche Mitarbeiter | Schreiber M.,Wissenschaftliche Mitarbeiter | And 3 more authors.
VGB PowerTech | Year: 2011

Pressurised Steam Fluidised Bed Drying (PS-FBD) of lignite was developed to make future power plants more efficient whilst simultaneously reducing carbon dioxide emissions. The first test facility was developed by the Brandenburg University of Technology in Cottbus and commissioned in 2002. A second dryer (10 tonnes/hour) is currently in operation at Vattenfall's pilot plant. In the coming years the pressurised steam drying technology will be included in the process chain of modern power plants. Many valuable results have been obtained from the test facility at the BTU Cottbus as well as from the pilot plant at Schwarze Pumpe and these are essential for the integration of PSFBD into Vattenfall's CCS demonstration plant by 2015. The paper describes the need for PSFBD in modern power plants and presents important results obtained from more than eight years of research and development. Source

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