POWER-GEN Asia 2018

Sessions Speakers Exhibitors Products Press Releases Floor Plan Buzz

Compact Turbine Design for Ultra-Super Critical Steam Parameters (Room Garuda 12, 1st Floor)

Since the market introduction of steam power plants with ultra-super critical steam conditions 20 years the majority of projects was mainly on larger units, i.e. power output per unit larger than 600 MW. For these applications the applied turbo sets consist of a high pressure and medium pressure expansions arranged in separate turbine casings. As the result of the COP21 agreement and the recently introduced financing guidelines for coal-fired steam power plants super critical and ultra-super critical steam parameters are becoming more interesting for applications at smaller power output too. To address this future market Siemens has launched a combined high- and intermediate pressure turbine considering super critical steam conditions in order to provide a cost effective solution also for the lower output range from 250 to 500 MW. The paper will deal with the further development for ultra-super critical steam conditions for 50 Hz as well as for 60 Hz markets. In addition, operational features of the turbine generator series are explained which support flexible load operation such as frequency support for grid stabilization or interaction with variation of power generated from renewable sources. Exemplarily, the impact of these features is explained in commercial business models and corresponding Capex and Opex benefits are described. Furthermore, customized scope options as well as recent improvements with respect to site construction and turbine arrangement will be explained and related advantages for EPCs will be shown.