Urban wind energy
Project start: 01. October 2014
Contact: Markus Drapalik
The increasing urbanization of the world population and the associated increasing energy consumption of cities requires a shift in the energy supply of cities to renewable energy sources in order to achieve the climate goals. In addition to photovoltaics in populated areas, small wind power is one way of achieving the goals of the new EU Buildings Directive, which calls for “almost zero energy” buildings. On the one hand there is a lack of innovative concepts for small wind turbines (SWT), on the other hand there are still many planning and safety uncertainties in the site evaluation and the use of small wind turbines in turbulent wind conditions, which often prevail in urban areas. Thus, the effect of turbulent flow conditions on the performance of SWT is not known in detail. Moreover, to date, small-scale wind turbines in urban areas do not have comprehensive impact and safety-related analyzes to assess the interaction with the environment and the hazard potential.
The investigations will be carried out on two representative technologies, a SWT plant with vertical and one with a horizontal rotor, at the same urban location, the ENERGYbase in Vienna – Floridsdorf, and at the rural test site in Lichtenegg. Due to the methodical approach, the results of the present project provide an essential basis for the technical assessment of the use of SWT in urban space in general. Within the framework of this project, the ISR is investigating the risk posed to people by SWT in urban areas, in particular due to icing and ice throw. For this purpose, observations of the icing of the plants and the resulting ice throw are carried out. On the basis of this data, specimens are created, which are thrown with the help of a specially developed throwing device for generating ice-throw-like conditions. The resulting widths and trajectories are recorded and compared with models. In addition, an examination of ice-repellent coatings is done. For this purpose, different coatings are applied to a SWT and the differences in the icing recorded. Furthermore, laboratory tests are carried out on the adhesion of the ice to the foils. Furthermore, the method of probabilistic safety analysis will be adapted for the study of SWT and thus a spectrum of possible hazards will be investigated.
Drapalik, M: Risk of ice throw from SWT. presentation at the 3. Internationale Kleinwindkrafttagung 2017, Vienna
Zajicek, L; Drapalik, M: Risikoanalyse der Nutzung von Kleinwindkraftanlagen in urbanen Gebieten
In: Institut für Energiesysteme und Elektrische Antriebe an der TU Wien (ESEA), IEWT 2017: Klimaziele 2050: Chancen für einen Paradigmenwechsel?
Zajicek, L : Probabilistic Safety Analysis for Small Wind Turbines. Masterarbeit – Institut für Sicherheits- und Risikowissenschaften, BOKU-Universität für Bodenkultur, https://zidapps.boku.ac.at/abstracts/download.php?dataset_id=16760&property_id=107
AIT Austrian Institute of Technology GmbH
Zentralanstalt für Meteorologie und Geodynamik