Main engine cooling water system include thermoregulator, fresh water cooler, lub oil cooler, fresh water pump, sea water pump, fresh water tank(also used as fresh water expansion tank).

• 主机冷却水系统由调温器、淡水冷却器、滑油冷却器、淡水泵、海水泵、淡水箱（兼淡水膨胀箱）组成。