Turbine Cleaning During Operation - ABB TPS44-F Series Operation Manual

Operation Manual / TPS44-F.. - TPS61-F..
5 Maintenance / 5.3 Turbine cleaning during operation

5.3 Turbine cleaning during operation

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The combustion of fuels such as heavy fuel oil (HFO) in diesel engines
produces contamination of the turbocharger's turbine components. In
combination with a high exhaust gas temperature, poor quality fuel can
lead to particularly hard deposits on the nozzle ring and especially on the
gas outlet flange.
ABB Turbocharging recommends the use of fuels with low ash, sulphur,
sodium and vanadium contents.
Consequences of contamination:
¡
Poor turbine efficiency
¡
elevated exhaust gas temperatures
¡
higher charging and ignition pressures as turbocharger speed rises
¡
lower engine performance.
¡
After stopping the engine, the rotor can become stuck in contamina-
tion deposits.
Experience with turbocharger operation shows that the intervals
between overhauls can be extended if cleaning while in operation is car-
ried out periodically. Wet cleaning the turbine, as described below,
should be used for 4-stroke applications when there are heavy deposits
from, for example, HFO.
Under no circumstances is periodic cleaning of the turbine during opera-
tion a substitute for the service work carried out when the turbocharger
is completely dismantled and cleaned mechanically.
Turbines which are very heavily contaminated cannot be cleaned this
way any longer. In this case, the contaminated components must be
mechanically cleaned by an ABB Turbocharging Service Station.
NOTICE
Regular cleaning
Regular turbine cleaning during operation prevents or delays excessive
build-up of contamination.
Cleaning intervals
The interval between periodic cleaning is very dependent on the operat-
ing conditions. In general, cleaning should be carried out every 50 to 200
operating hours.
NOTICE
Cleaning intervals
Should the specified cleaning intervals prove incompatible with engine
operation, please contact ABB Turbocharging.
HZTL2412_EN Rev.G March 2020