Operation Manual / A130-M.. - A145-M..
7 Periodic maintenance work / 7.3 Cleaning the turbine during opera-
tion
© Copyright 2022 ABB. All rights reserved.
HZTL4031_EN
Rev.P
February 2022
7.3.5
Prerequisites
Characteristic/component
Conditions
Engine load (guideline value)
20 … 40 %
*) Turbine inlet temperature T
TE
before water injection
350 … 430 °C
Stabilisation phase after T
TE
has been reached
10 minutes
Stabilisation phase after turbine cleaning
10 minutes
Water supply
ensured
Water pressure (overpressure compared to atmosphere) p
WT
1.5 bar
Water temperature
5 … 30 °C
Table 15: Turbine wet cleaning, recommended operating state
*) The temperature at the turbine inlet can be up to 100 °C 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 clean-
ing cycle can be started when the above conditions are fulfilled.
The water mass flow to be set can be found in the Operation Manual.
7.3.6
Carrying out wet cleaning of the turbine
CAUTION
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 com-
ponents and can cause flooding of the turbine.
u
It is imperative that turbine cleaning parameters are observed.
CAUTION
Maximum temperature at turbine inlet during cleaning
During cleaning, the temperature at the turbine inlet will rise and may strain
the material significantly.
u
Make sure the maximum temperature at the turbine inlet is not exceeded
during cleaning.
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