Entwicklung und Inbetriebnahme eines Teststandes für die beschleunigte Alterung von Aluminiumreflektoren

Abstract

The subject of global warming, climate protection and sustainability has become globally more important in recent years and not least because of steadily rising energy prices. These issues will further become more a center point of society. The demand for energy, especially in economically growing regions of the world, will constantly increase and continue so. Therefore, in the future, the major challenges are a responsible handling with respect to our nature, as well as an environmentally friendly and resource saving energy supply. For these reasons an increasing number of experts of all energy-sectors are dealing with the question of efficient use of energy. The biggest available energy source on earth is provided by the renewable resources. In particular, solar energy plays a fundamental role. The existing fossil as well as nuclear energy sources are clearly moved to the background by the annual energy supply from the sun, which exceeds the global energy demand significantly. Already today the solar energy is technically easy to use for variety of different plants. Therefore, it is not surprising that the portion of renewable energy sources is continually rising worldwide. The main part of the master thesis is concerning with the energy supply from solar thermal power plants. In particular, it has to do with the quality management of novel aluminum reflectors, which is one of the key components in the system of solar thermal power generation. The reflectors have the task to reflect effectively the incident solar radiation. The aim is to keep the high capacity for reflection over the longest possible service life. The most reliable way to verify this is to expose the reflectors under environmental conditions. Therefore, several of reflectors samples are placed at different locations with different conditions. In order to reduce the testing time, accelerated aging tests are carried out in the laboratory. The main focus of this thesis is on the development and set up of a combined accelerated aging test. Several samples getting soiled by sand and being submitted to various standardized aging procedures afterwards. A correlation to the results of the outdoor weathering test will eventually supplies first conclusions in terms of the durability.