Publications
Steam turbine generator configuration and sizing considering the impacts of carbon capture system availability
1st March 2011
Topic(s): Carbon capture use and storage (CCUS), CO2 capture
The steam turbine configuration and sizing is a critical part of the design basis for the coal fired power plant, and in particular with plans for incorporating carbon capture and storage. This report, undertaken by Tenaska as part of its plant design work for the Trailblazer project, examined plant operating modes, part load operation, overall operability and ultimately the profitability of the plant given the markets for power and CO2 in Texas. Since the carbon capture process utilises approximately 30 per cent of the steam energy generated in the boiler, the key question addressed is should the steam turbine be sized for 70 per cent flow left when the carbon capture plant is running, or the full steam flow to generate more power when the carbon capture plant is off-line.
Tenaska worked with a number of major steam turbine generator (STG) manufacturers to develop steam/water cycles for the Project that would allow either the simultaneous generation of power and provision of steam for the flue gas carbon capture process, or operation power generation only mode with no steam to the carbon capture process. Project developers and technical staff may benefit from the lessons learnt from the Trailblazer project in this study.
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