Operation Manual / 4 Product description / A130-H.. - A140-H..
6
Periodic maintenance work
Page 52 / 115
© Copyright 2015 ABB. All rights reserved.
HZTL4030_EN
Revision C
September 2015
6.3.5
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 13: Turbine wet cleaning, recommended operating state
*) The temperature at the turbine inlet can be up to 100
℃ higher than the exhaust gas
temperature 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
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
components and can cause flooding of the turbine.
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.
Make sure the maximum temperature at the turbine inlet is not exceeded
during cleaning.