Power Generation Steam Turbine

Start-up Failure
Turbine started up and running correctly
Country:
U.A.E.
Application:
Compressor type:
N. 2 Steam Turbines
Service
Power generation
Power:
10 MW
Pressure:
Power Generation Steam Turbine
Problem

Turbine trip during start-up on both units. Severe damage to the rotors due to rubbing against the stator

Solution
  • RCA indicated casing bow (non uniform expansion), resulting from an insufficient thermal insulation of the casing
  • Re-calculation of the thickness of the thermal insulation
  • Suggested new procedure for turbine warm-up
  • Revised seal radial clearance