ABB Turbo Systems Switzerland Power2 550-M44 Operation Manual page 63

Operation Manual / Power2 550-M / High-pressure stage
7 Periodic maintenance / 7.4 Cleaning turbines and nozzle rings during
operation
Turbo Systems recommends using fuels with a mass ratio of vanadium to sodium of less
than 3:1 so that the melting temperature of the sodium vanadyl vanadate is as high as pos-
sible.
Consequences of contamination:
¡
Poor turbine efficiency
¡ Elevated exhaust gas temperatures
¡
Higher charging and ignition pressures with increasing speed of the low and high-pres-
sure stages
¡
Lower engine performance
¡
Increased rotor unbalance
Experience in operation shows that, with periodic cleaning during operation, the interval
between overhauls can be extended. The wet cleaning of a turbine described in the following
can be used for 4-stroke applications with heavy deposits (such as MDO and HFO applica-
tions, for example). Generally, turbine cleaning is not required for the other applications.
Periodic cleaning of the turbines during operation never replaces the service work where the
low and high-pressure stages are completely dismantled and mechanically cleaned.
Very heavily contaminated turbines can no longer be cleaned in this way. In this case, the
contaminated components must be cleaned mechanically by a Turbo Systems service sta-
tion.
© Copyright 2022 ABB. All rights reserved. HZTL4058_EN Rev.F March 2022