ABB HT563830 Operation Manual page 10

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Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33
Preliminary remarks
Layout and function
Turbocharger version with compressor wheel cooling system
Depending on its range of use, the turbocharger is
provided with a compressor wheel cooling system.
Compressor wheel cooling means that, after the charge air
cooler at the engine end, cooled compressor air is
delivered to the turbocharger to cool the compressor
wheel.
In view of the respective operating conditions, it is
absolutely essential that the compressor wheel is cooled in
order to guarantee its reliability and replacement intervals.
In the case of the turbocharger version with compressor
wheel cooling, the cooling air is supplied through the side
connection (15) in the bearing casing.
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