Flexible Turbocharger Cut-Out - ABB HT844414 Operation Manual

Operation Manual / 4 Product description / A100-L
5 Operation and service / 5.4 Flexible turbocharger cut-out
Influencing parameters
The specified values are guideline values and are not guaranteed. The actual values can devi-
ate considerably from the guideline values, for example, due to the following influences:
¡
Fuel quality and fuel treatment
¡
Load profile (thermal cycling, also number of starts/stops, emergency shutdowns, oper-
ating point)
¡
Gas inlet temperature
¡
Frequency and execution of cleaning process during operation
¡
Turbocharger specification.
¡
System-specific operating conditions (combustion quality, exhaust gas composition)
For bearing parts
¡ Lubricating oil quality (oil filtering, oil condition, oil monitoring)
¡
Load profile (speed, pressure conditions, temperature)
¡
Number of starts/stops
¡
Unbalance of the rotor (degree of contamination).
5.4

Flexible turbocharger cut-out

If the load is low, an engine which is charged by multiple turbochargers can be operated with
one turbocharger switched off. The flexible switch-on or switch-off of a turbocharger is re-
ferred to as a "flexible turbocharger cut-out". In flexible systems, slide valves or flaps are in-
stalled by the enginebuilder before the gas inlet and after the air outlet of the turbocharger.
Depending on the version of the system, the turbocharger can be switched off or on manu-
ally or automatically. In all cases, you must observe the enginebuilder's recommendations.
The lubricating oil supply of the switched-off turbocharger must not be switched off due to
the engine vibrations. To ensure that there are no oil or gas leaks on the switched off tur-
bocharger, it must be supplied with external sealing air.
The turbocharger may only be switched on or off while the engine is stopped or in idle mode.
CAUTION
Flexible turbocharger cut out
Improper manipulations can result in inadmissible turbocharger speeds
which can lead to serious damage to property with grave consequences.
The air outlet flap and gas inlet flap must be completely open during nor-
u
mal operation.
During cut out operation, the air outlet flap and gas inlet flap must be
u
completely closed.
© Copyright 2018 ABB. All rights reserved. HZTL4034_EN Revision N November 2018