Fig. 31: Cleaning Cycle Of Turbine And Nozzle Ring With Load Ramp - ABB HT608016 Operation Manual

Operation Manual / A170-M.. - A175-M..
7 Periodic maintenance / 7.5 Cleaning turbine and nozzle ring
Procedure with automated cleaning
The following operating state and the following prerequisites have been tested and ap-
proved by ABB Turbocharging for cleaning operations:
Set the engine load as follows:
u
¡
Turbine mass flow M
¡ Turbine pressure ratio PIT ≈ 1.1
¡
Turbine inlet temperature between 380 ... 430 °C
Fig. 31: Cleaning cycle of turbine and nozzle ring with load ramp
As soon as the turbine inlet temperature is stable and less than 430 °C, wait for least 10
u
additional minutes for the turbine-end turbocharger components to cool down.
Start the cleaning cycle according to the following description Wet cleaning procedure.
u
Continuously increase the engine load during washing:
u
¡
Turbine mass flow M
¡
Turbine pressure ratio PIT = 1.6 ... 2.0
¡
Turbine inlet temperature <430 °C
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≈ 4.1 kg/s
Turb
≈ 6.5 kg/s
Turb
HZTL4033_EN Rev.H July 2021