ABB A175-M52 - Fig. 31: Cleaning Cycle of Turbine and Nozzle Ring with Load Ramp

Operation Manual / A170-M.. - A175-M..
7 Periodic maintenance / 7.5 Cleaning turbine and nozzle ring
© Copyright 2020 ABB. All rights reserved. HZTL4033_EN Rev.G December 2020
Procedure with automated cleaning
The following operating state and the following prerequisites have been tested and ap-
proved by ABB Turbocharging for cleaning operations:
u Set the engine load as follows:
¡ Turbine mass flow M
Turb
≈ 4.1 kg/s
¡ 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
u As soon as the turbine inlet temperature is stable and less than 430 °C, wait for least 10
additional minutes for the turbine-end turbocharger components to cool down.
u Start the cleaning cycle according to the following description Wet cleaning procedure.
u Continuously increase the engine load during washing:
¡ Turbine mass flow M
Turb
≈ 6.5 kg/s
¡ Turbine pressure ratio PIT = 1.6 … 2.0
¡ Turbine inlet temperature <430 °C
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