ABB A140-H56 Operation Manual page 68

Operation Manual / A130-H.. - A140-H..
8 Periodic maintenance
If the specified cleaning intervals are incompatible with operation of the engine, please contact
ABB Turbo Systems.
Cleaning method
The turbine components are cleaned during operation using the wet cleaning method. This
cleaning method is tested and approved by ABB Turbo Systems.
The precondition for wet cleaning is that the enginebuilder approves the process and these
regulations are observed.
Principle of wet cleaning
To clean the turbine stage during operation, water is injected before the nozzle ring.
Based on an injection phase of 10 minutes, this cleaning procedure uses the principle of water
solubility of dirt deposits.
8.3.1 Prerequisites
Corrosion and deposits when cleaning
Salt water and cooling water treatment substances damage and adversely
affect turbocharger parts.
CAUTION
Never use salt water, but only pure water for cleaning.

Recommended operating state for wet cleaning of turbine
Characteristic/component
Engine load (guideline value)
*) Turbine inlet temperature T
jection
Stabilisation phase after T
Stabilisation phase after turbine cleaning
Water supply
Water pressure (overpressure compared to atmo-
sphere) p
WT
Table 10
*) The temperature at the turbine inlet can be up to 100 ℃ higher than the exhaust gas tempe-
rature after the cylinder. This must be taken into account when setting the operating point be-
fore 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.
© Copyright 2013 ABB. All rights reserved.
before water in-
TE
has been reached
TE
HZTL2414_EN
Page 66 / 115
Conditions
20 ... 40 %
350 ... 430 °C
10 minutes
10 minutes
ensured
1.5 bar
Revision B
March 2013