Toshiba’s single-cylinder, single flow steam turbines are designed for 1x1 combined-cycle configurations featuring F-, G- or H-class gas turbines. These turbines range in output from 150—230 MW and feature last stage blades lengths of 33.5, 35 and 40 inches.
Performance of Toshiba’s steam turbines is enhanced through several design features that improve turbine performance and increase durability. Chief among these features are advanced steam paths with optimized reaction stages, advanced sealing with sensitized packing, transonic vane profiles for last stage blades, low bearing losses and reduced pressure drop at the turbine inlets/outlets.
One of the SCSF’s main features is its compactness, while providing the same output as some two-cylinder designs. This enables a smaller footprint and shorter erection schedule. The absence of crossover piping and reduced pressure loss from the single case design can result in maintenance benefits over the life of the plant.