COOLING SYSTEM FOR CENTRAL FRESH WATER OF MARINE VESSEL

摘要

PROBLEM TO BE SOLVED: To adjust a discharge quantity of a sea water pump according to a load of cooled equipment and to reduce power of the sea water pump.;SOLUTION: According to a cooling system for central fresh water of a marine vessel, a discharge quantity of a sea water pump 5 is controlled by control means 11 so that a temperature difference between a temperature of fresh water after heat exchanging thereof with sea water by a heat exchanger 2 and a temperature of taken-in sea water becomes a set temperature difference. Herein, when load of cooled equipment 1 becomes lower than a set maximum load (for example, 100%), the temperature of fresh water becomes lower than the temperature of fresh water when the cooled equipment 1 has the set maximum load, and a temperature difference between the temperature of fresh water and the temperature of sea water becomes smaller than the set temperature difference. Consequently, a discharge quantity of the sea water pump 5 is controlled so that the temperature of fresh water rises and the temperature difference becomes the set temperature difference, and the discharge quantity of the sea water pump 5 can be lowered than a set maximum discharge quantity (for example, 100%).;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT