Table 15: Turbine Wet Cleaning, Recommended Operating State - ABB HT609055 Operation Manual

Operation Manual / A130-M.. - A145-M..
7 Periodic maintenance work / 7.3 Cleaning the turbine during opera-
tion
7.3.5 Prerequisites
Characteristic/component
Engine load (guideline value)
*) Turbine inlet temperature T
Stabilisation phase after T
Stabilisation phase after turbine cleaning
Water supply
Water pressure (overpressure compared to atmosphere) p
Water temperature
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.
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.
It is imperative that turbine cleaning parameters are observed.
u
CAUTION
Maximum temperature at turbine inlet during cleaning
During cleaning, the temperature at the turbine inlet will rise and may strain
the material significantly.
Make sure the maximum temperature at the turbine inlet is not exceeded
u
during cleaning.
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before water injection
TE
has been reached
TE
HZTL4031_EN
Conditions
20 ... 40 %
350 ... 430 °C
10 minutes
10 minutes
ensured
1.5 bar
WT
5 ... 30 °C
Rev.N March 2021