Fig. 27: Load/Time Chart - ABB Turbo Systems Switzerland Power2 550-M44 Operation Manual

Operation Manual / Power2 550-M / High-pressure stage
7 Periodic maintenance / 7.4 Cleaning turbines and nozzle rings during
operation
7.4.3 Wet cleaning of turbine blades and nozzle ring
Prerequisites
The following operating state and the following prerequisites have been tested and ap-
proved by Turbo Systems for cleaning operations:
Set the engine load between 20 ... 50% so that the turbine inlet temperature is between
u
380 ... 430 °C.
Fig. 27: Load/time chart
Once the turbine inlet temperature of the high-pressure stage is stable and lying below
u
430 °C, wait at least another 10 minutes for the parts of the low and high-pressure stages
to cool down.
Start the cleaning cycle according to the following description Wet cleaning operation.
u
Only clean the low-pressure stage (Cleaning LP stage) if the low-pressure stage is con-
u
figured with this option. If this is not the case, drying is initiated directly after cleaning of
the high-pressure stage (Cleaning HP stage).
© Copyright 2022 ABB. All rights reserved. HZTL4058_EN Rev.F March 2022