ABB HT570679 Operation Manual page 78

Operation Manual / 4 Product description / A150-M.. - A155-M..
6 Periodic maintenance work
6.3.5 Prerequisites
Two different turbine cleaning devices are available for the turbochargers A150-M and A155-M
with single-inlet turbine casing:
 Device consisting of one cleaning nozzle per gas inlet on turbine casing
 Device consisting of six cleaning nozzles with connecting pipe for water and scavenging
air
Characteristic/component
Cleaning device
Engine load (guideline value)
*) Turbine inlet temperature T
before water injection
Stabilisation phase after T
been reached
Stabilisation phase after turbine
cleaning
Water supply
Water temperature
External air supply
Water pressure (overpressure
compared to atmosphere) p
External air pressure p
Table 12: Turbine wet cleaning, recommended operating state
*) The temperature at the turbine inlet can be up to 100 ℃ higher than the exhaust gas tem-
perature after the cylinder. This must be taken into account when setting the operating point
before cleaning.
If necessary, the engine performance must be reduced to meet these conditions.
The cleaning cycle can be started when the above conditions are fulfilled.
6.3.6 Carrying out wet cleaning of the turbine
Inadmissible thermal stress and flooding of the turbine
Smaller amounts of water can lead to an inadequate cleaning result. Larger
amounts of water lead to inadmissible thermal stress on the turbine compo-
CAUTION
nents and can cause flooding of the turbine.
It is imperative that turbine cleaning parameters are observed.

© Copyright 2017 ABB. All rights reserved.
one cleaning nozzle per gas inlet
TE
has
TE
WT
PA
Conditions
20 ... 40 %
350 ... 430 °C
10 minutes
10 minutes
ensured
5 ... 30 °C
- -
1.5 bar
- -
HZTL4032_EN
Page 48 / 120
six cleaning nozzles
optional
2.5 bar
1 bar
Revision F January 2017