2
7
3. Operation
3.1 Maximum flow rates
The table below gives maximum flow rates for Charge Air Coolers in either single
two or three pass configuration, 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 fluid 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
refill 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)
