BOWMAN EC120 - 3 Operation; Maximum Flow Rates; General Information

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3. Operation
3.1 Maximum flow rates
The table below gives maximum ow rates for Charge Air Coolers in either single
two or three pass conguration, using either sea water or fresh water cooling.
Max Recommended Flowrate (I/min) Max Recommended Flowrate (I/min) Max Recommended Flowrate (I/min)
EC range 50 80 170
FC range 80 120 230
FG range 110 170 320
GL range 200 290 560
GK range 300 450 900
JK range 400 600 1200
PK range 650 1000 2000
RK range 900 1400 2800
Max Recommended Flowrate (I/min) Max Recommended Flowrate (I/min) Max Recommended Flowrate (I/min)
EC range 75 120 255
FC range 135 200 380
FG range 180 270 530
GL range 320 470 900
GK range 460 690 1400
JK range 660 1000 2000
PK range 1000 1500 3000
RK range 1400 2150 4300
3.2 General information
It is essential that the following instructions are followed to prevent premature
failure of the Charge Air Cooler due to erosion or corrosion.
a) Always maintain the water pH to correct levels. The ideal water pH
should be kept within 7.4 to 7.6. On no account should it fall below 7.2 or
rise above 7.8.
b) The table above gives the maximum uid velocities through the cooler
and must not be exceeded. If in doubt contact our technical sales team
for guidance.
c) Minimum water velocity of 1m/s should be used.
d) Ensure compliance with water quality and maximum permissible
pressure requirements.
e) Air must be adequately vented from the water circuit.
f) Stagnant water should not be allowed to accumulate in the cooler. If
it is not in use for any period of time the water should be drained. During
commissioning, shutdown and standby periods, if the cooler has not
been used over a 4-6 day period, it should be drained, cleaned and kept
dry. Where this procedure is not possible, drain the stagnant water and
rell the cooler with clean sea or fresh water, which should be replaced
with oxygenated sea water every 2-3 days to avoid further decomposition.
Take Care
3-Pass
2-Pass
1-Pass
Cooler
3-Pass
2-Pass
1-Pass
Cooler
Sea Water Application (Maximum 2 m/s)
Fresh water Application (Maximum 3 m/s)