The SST-111 combines the robustness and adaptability of a single-stage geared steam turbine with the higher efficiency of a multi-stage steam turbine
Siemens Energy presented two new developments in its industrial steam turbine portfolio at the POWER-GEN Europe 2012 exhibition and conference in Cologne recently: the new Enhanced Platform steam turbine design concept and the new Model SST-111 industrial steam turbine. The Enhanced Platform design will be deployed for Siemens industrial steam turbines with outputs between 15 and 250 megawatts (MW). The design enhancements are expected to result in higher efficiency, faster startup, enhanced availability, a broader range of applications, and greater ease of maintenance.
In addition, Siemens has added a new industrial steam turbine for outputs of up to 12 MW to its portfolio: the Model SST-111. The turbine’s multi-casing design features a high degree of operational flexibility, making it ideal for small decentralized power generating facilities. Siemens has already received its first order for a SST-111 steam turbine from Devon County Council and Viridor Waste Management Ltd in the United Kingdom. The new turbine will be installed in a refuse incineration plant situated in Exeter.
The new Enhanced Platform design launched by Siemens will be applied with immediate effect to its SST-600 and SST-800 industrial steam turbines and will then be introduced step by step for the SST-300, SST-400 and SST-500 steam turbines. The improved design concept combines proven technologies from existing Siemens turbine families. It is based on individual standardized modules that are put together according to the particular application and the requisite steam parameters. Optimized blade geometries will help increase efficiency, enabling the turbines to produce more power from the same amount of resources. The new industrial steam turbines based on the Enhanced Platform design can operate with main steam pressures of up to 165 bar in combination with main steam temperatures of up to 565°C.
With the new Model SST-111 industrial steam turbine, Siemens is extending its portfolio of compact steam turbines by adding a multi-stage machine for outputs of up to 12 MW. Important features of the new turbine are its high efficiency, fast startup capabilities, and low maintenance costs. The SST-111 combines the robustness and adaptability of a single-stage geared steam turbine with the higher efficiency of a multi-stage steam turbine. The multi-casing design enables up to two controlled steam extractions to be provided for different industrial processes as well as for steam reheating. An additional steam admission is also possible. This makes for operational flexibility paired with high efficiency.