Large Size Steam Turbine

Literature

Superiority in operation

• Blade configuration matching with operation
  • Full-arc admission system provides higher efficiency for entire operation range for sliding pressure operation plant.
  • Nozzle cut-off system provides higher efficiency at low-loads for constant pressure operation plant.
• High turbine efficiency
  • High efficiency reaction blades with integral shroud as well as twisted and/or 3DS blades.
  • Advanced high-efficiency low-pressure (LP) blades with reliable free-standing design.
• Simple and large flexibility operation
  • Automatic operation by means of digital governor through start-up, full load, shut down and on-load valve test.
  • Weekly start and stop or daily start and stop operation
  • Large allowable load change rate and cyclic load change
  • Large allowable frequency range at -5 to+3%of rated speed for continuous operation.

High-reliability and long life

• Safe and high-reliability design
  • Double shell construction in high-pressure (HP) and intermediate-pressure (IP) turbine reduces thermal stress during start-up and large-load change.
  • Triple shell construction in low-pressure (LP) turbine minimizes thermal deformation during operation also effect during start-up and large-load change.
  • Drum type rotor provides high-stability against vibrations.
  • Bearing pedestals separated from the casing minimize influence of casing deformation on shaft vibration.
  • Single-point support bearings provide high-stability against uneven subsiding of foundations.
  • Reaction blades with integral shroud provide high-reliability against steam excitation force.
  • Free-standing LP blades tuned individually avoid resonance and group vibration.

Long life design

• Full-arc admission control of inlet steams with high-temperature avoids thermal stress and deformation.
• Thermal stress evaluation system supervises turbine life consumption during start-up period.

Combination of proven components: HP+IP+LP or HP/IP+LP

Turbine type: Reheat Condensing

Exhaust direction: Down or Side

Speed: 3,000 and 3600 rpm