Marine Installation Manual
2021-08
4-6
4 Ancillary Systems
4.2 Cooling water system
X72DF
Arrangement 1
To maintain the required SAC inlet temperature, the automatic temperature con
-
trol valve of the central freshwater cooling system is set to 25 °C (WinGD speci
-
fication). In this arrangement, the ancillary plant and other cooler temperatures
are controlled and maintained by this single temperature set-point.
Figure 4
-
3 LT cooling water circuit — Single set-point temperature
Arrangement 2
The central freshwater cooling system is separated into different cooling streams
to provide different temperature set-points for the ME SAC and ancillary equip
-
ment. To maintain the required SAC inlet temperature, the automatic tempera
-
ture control valve of the central freshwater cooling system must be set to 25 °C
(WinGD specification). The ancillary plant temperature control valve can be set
differently as the specific project requires, for example between 25 and 36 °C.
Figure 4
-
4 LT cooling water circuit — Dual set-point temperatures
SM-0319
Main
Engine
6 (set-point: 25°C)
SAC
1
2
4
5
6
7
8
9
12
10
11
3
1 Scavenge air cooler (SAC)
2 HT cooling water cooler
3 Lubricating oil cooler
4 MGO/MDO cooler
5 Ancillary plants
6 Automatic temp. control valve
7 LT Cooling water pump
8 Central seawater cooler
9 Seawater circulating pump
10 Low sea chest
11 High sea chest
12 Seawater strainer
SM-0320
Main
Engine
6 (set-point: 25°C)
SAC
1
2
4
5
6
7
9
10
13
11
12
3
1 Scavenge air cooler (SAC)
2 HT cooling water cooler
3 Lubricating oil cooler
4 MGO/MDO cooler
5 Ancillary plants
6 Automatic temp. control valve
7 LT Cooling water pump
8 CW pumps for ancillary plant
9 Central seawater cooler
10 Seawater circulating pump
11 Low sea chest
12 High sea chest
13 Seawater strainer
6 (set-point:
customised by S/Y)
8
