STEAM TURBINE, STEAM TURBINE ASSEMBLY, STEAM TURBINE INSTALLATION AND METHOD FOR OPERATING A STEAM TURBINE ASSEMBLY

摘要

To achieve greater efficiency, steam turbines are operated at increasingly higher temperatures. The main components of steam turbines, which are subjected to an operating temperature that exceeds a material-related threshold temperature, the latter concerning in particular conventional steel, must be configured from extremely high-quality materials. The use of higher quality materials leads to the necessity for weld seams between the higher quality material and a conventional material. For construction purposes, turbine regions that are subjected to temperatures below the material-related threshold temperature are usually also configured from high-quality materials. The aim of the invention is to operate a compact steam turbine assembly (1, 2) with maximum steam production that is cost-effective and commercially safe. This is achieved by a first turbine (11, 11'), which is designed to operate as a high-pressure steam turbine and can be subjected to steam at temperatures that exceed or are at a first material-related threshold temperature and a second turbine (12, 12'), which is designed to operate as a medium-pressure steam turbine and can be subjected to steam at temperatures that lie below or at a second material-related threshold temperature. A drive (15) is connected between the two turbines (11, 11' 12, 12').