probabilistic design of steam turbine components - layout criteria
Projektleiter: | Prof. Dr.-Ing. K. Vogeler |
Bearbeiter: | Dipl.-Ing. David Pusch |
Wissenschaftliche Kooperation: | AG Turbo (COOREFLEX-turbo) |
Finanzierung: | Siemens AG, BMWi |
Bearbeitungszeitraum: | 01/2014 – 12/2016 |
Beschreibung:
The amount of renewable energies in electric power generation increased remarkable in the recent years. This fact has also a huge impact on conventional power plants and their operation mode. In order to stay competitive and to guaranty a robust electricity grid, conventional power plants have to respond to power fluctuations very fast and flexibly. Consequently the power plants components, like the steam turbine, which has been designed for and been operated in base load for many years is now exposed to frequent load changes, deep part load operations and augmented start-stop-cycles. These transient operations lead to thermo-mechanical stresses in massive parts like the steam turbine rotor.
The rotor damage caused by transient operation should be investigated using probabilistic methods. A sensitivity study provides information about the key drivers of the rotor low cycle fatigue damage. Thereby probabilistic methods allow for taking also the uncertainties of the thermal, mechanic and geometric boundary conditions into account. With knowledge about the systems behavior it is possible to modify the design or to adjust the operation profiles in order to optimize the rotor lifetime.