Operation Manual / Power2 550-M / High-pressure stage
7 Periodic maintenance / 7.4 Cleaning turbines and nozzle rings during
operation
© Copyright 2022 ABB. All rights reserved.
HZTL4058_EN
Rev.F
March 2022
Cleaning parameters for wet cleaning of the turbines
Power2
Max. temper-
ature when
starting
cleaning
T
TI
[°C]
Lead time
at reduced
load
t
i
[min]
Injection
time
t
i
[min]
Drying
time
t
i
[min]
Water flow rate
per low-pressure
stage at p
Water
= 3
bar
V
W
[dm³/min]
Overpres-
sure above
p
TE
of the ex-
ternal scav-
enging air
[bar]
550 LP
≤ 430
≥10
10
≥10
18
≥1
Table 20: Cleaning parameters
Power2
Max. tem-
perature
when start-
ing cleaning
T
TI
[°C]
Lead time at
reduced
load
t
i
[min]
Injection
time
t
i
[min]
Drying
time
t
i
[min]
Water flow rate
per high-pres-
sure stage at
p
Water
= 3 bar
V
W
[dm³/min]
Overpres-
sure above
p
TE
of the ex-
ternal scav-
enging air
[bar]
550 HP
≤ 430
≥10
10
≥10
See the follow-
ing table, de-
pending on the
engine load and
turbine specific-
ation
≥1
Table 21: Cleaning parameters
Power2 550 HP water volumes during turbine cleaning
Depending on the turbine specification (TV10TT50TA..), the corresponding water volume is
set by the enginebuilder.
If operating with engine loads between the specified values, it is possible to interpolate the
flow rate.
Engine load
TV10 TT50
TA13
TV10 TT50
TA16
TV10 TT50
TA20
TV10 TT50
TA24
[%]
Water flow rate V
W
[dm
3
/min]
20
13.2
15.7
18.9
22.0
35
14.4
17.2
20.7
24.2
50
15.3
18.2
22.0
25.6
Table 22: Water volumes
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