ABB TPS52-F31 Operation Manual

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ABB TPS52-F31 Operation Manual Manual pdf 62 page image

Operation Manual / TPS44-F.. - TPS61-F..Maintenance 5Turbine cleaning during operation 5.3 Page 60© Copyright 2016 ABB. All rights reserved.September 2016HZTL2412_ENRevision FTurbine cleaning during operation5.3The combustion of fuels such as heavy fuel oil (HFO) in diesel enginesproduces contamination of the turbocharger's turbine components. Incombination with a high exhaust gas temperature, poor quality fuel canlead to particularly hard deposits on the nozzle ring and especially on thegas outlet flange.ABB Turbo Systems recommends using fuels with a low ash, sulphur, so-dium and vanadium content.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 contaminationdeposits.Experience with turbocharger operation shows that the intervals betweenoverhauls can be extended if cleaning while in operation is carried out pe-riodically. Wet cleaning the turbine, as described below, should be usedfor 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 iscompletely dismantled and cleaned mechanically.Turbines which are very heavily contaminated cannot be cleaned this wayany longer. In this case, the contaminated components must be mechani-cally cleaned by an ABB Turbocharging Service Station.NOTICERegular cleaningRegular turbine cleaning during operation prevents or delays excessivebuild-up of contamination.Cleaning intervalsThe interval between periodic cleaning is very dependent on the operatingconditions. In general, cleaning should be carried out every 50 to 200 op-erating hours.5.3