Suchergebnisse

With the beginning of modern times innovative materials as well as the respective engineering and processing methods show enormous technical and economic potential, because of which research and development into this field is gaining a lot more importance for companies in order to stay competitive. Further, the careful and economical uses of scarce energy resources are increasingly forced by politics and the public to lower emissions and to cope with the growing environmental pollution as a challenge to the last and the current century. Currently, Germany is in a continuous process of change in terms of today's electrical energy supply. The process, defined by the current energy policy, makes fundamental changes in Germany's energy supply system necessary [1]. The leading example is the integration of large subsidized amounts of renewable energy sources (wind and solar power). In 2013, the share of renewable energy in the gross electricity generation was already 31.5 % and will be increased to 50 % in 2030 [2, 3]. Furthermore, with the proclaimed "Energy Target 2050" according to [4], the entire energy supply of Germany by renewable energy (RE) was found for technical possible and economically benifical. Consequently, the future development of the national and European energy landscape is linked to a massive expansion of electricity grids because of the growing number of RE plants (cf. [5]). Especially critical is the performance of reserve power which is connected to the issue of flexible security and reliability for stable system operation. A study commissioned by the federal ministry for economics and technology (BMWi) states that apart from pumped-storage power plants (PSP) there is no large-tank technology commercially available [6]. Because of geographical circumstances, nature conservation requirements, or a lack of social acceptance the continued construction of new PSP is heavily limited [7]. Future coverage of the required control power consumption relies on innovative storage systems. Their efficient ...