ABB PT003901 - Power2 Layout and Function; Fig. 1: Layout and Function

Operation Manual / Power2 340-H / High-pressure stage
1 Introduction / 1.4 Power2 layout and function
© Copyright 2022 ABB. All rights reserved. HZTL4054_EN Rev.F March 2022
1.4 Power2 layout and function
Fig.1: Layout and function
Power2 Two-stage turbocharging 21 HP compressor
Power2 LP Low-pressure stage 22 HP turbine
Power2 HP High-pressure stage 23* Gas piping (bellows)
A Exhaust gas inlet from internal combus-
tion engine
24 LP turbine
B Exhaust gas outlet 25 LP compressor
C Air or air/gas mixture inlet 26 Intercooler
D Air or air/gas mixture outlet and supply
to the charge air cooler
- - - Not included in the Turbo Systems
scope of delivery
*) If present
The diagram shows the position of the low-pressure (Power2LP) and high-pressure stage
(Power2HP) within two-stage turbocharging (Power2). The low-pressure stage is always op-
erated in combination with a high-pressure stage connected in series. The two-stage tur-
bocharging (Power2) supplies the engine with the air volume and associated charging pres-
sure required for operation.
Here, the exhaust gases of the internal combustion engine flow through the turbine (22) of
the high-pressure stage and subsequently through the bellows (23*) of the gas pipe to the
turbine (24) of the low-pressure stage. The compressor (25) of the low-pressure stage sucks
in fresh air or the air/gas mixture, respectively. This precompressed air or air/gas mixture
flows through the intercooler (26) into the compressor (21) of the high-pressure stage. Here
the air or air/gas mixture is compressed further and leaves the two-stage turbocharging
(Power2) in the direction of the charge air cooler.
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