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Chemical Processes and Use of CO2

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Chemical Processes and Use of CO2 ( chemical-processes-and-use-co2 )

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EP-WÜT FUNDED PROJECTS The following work packages were carried out during the project: 1. Fundamental examination of the chemical resistance of the polymer film material under mechanical and thermal loading 2. Experimental determination of the optimum structure of the studded surface that holds the film in place 3. Design and fabrication of the lab-scale and pilot-scale demonstrators 4. Developmentofnumericalmodelstocalculateheattransfercharacteristics. To carry out the tests of mechanical strength and chemical resistance, a pres- surised test vessel was developed that enabled long-term stress tests to be performed in which the films were in continuous contact with the relevant organic solvents and at a constant temperature of up to 90 °C. The tests were conducted under conditions of constant mechanical loading (pressures of up to 6 bar, applied perpendicularly to the film) and under pulsed loading (between 45 and 550 load cycles per hour for up to 1200 hours). To study the heat transfer characteristics, a new test rig was developed that enabled both liquid-liquid and condensation experiments to be performed. The liquid-liquid tests were carried out with water (as this simplified the va- lidation of the numerical models), while the condensation experiments were carried out using hexane. 3.6.3 Results The project results can be split into three groups: the results from the basic testing of the material properties of the polymer films, the results of the ex- perimental studies of heat transfer using the demonstrators, and the results of the numerical modelling work. Abb. 95: Left: Demonstrator in operation; Right: Base plate showing the gasket and the studded surface that supports the film 227

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