Ship parallel type low-temperature fresh water cooling system and cooling method

The invention relates to the technical field of ships, and discloses a parallel low-temperature fresh water cooling system and method for a ship. The parallel type low-temperature fresh water cooling system for the ship comprises a central cooler, a generator and an auxiliary mechanical module. Under the action of the first cooling water pump, cooling water of the central cooler cools the generator through the first cooling loop, and under the action of the second cooling water pump, the cooling water of the central cooler cools the auxiliary mechanical module through the second cooling loop. The first cooling water pump is integrated in the generator, the cooling water pump of the generator is fully utilized, the displacement requirement and energy consumption of the second cooling water pump are reduced, the carbon emission of a ship is reduced, the boundary dimension of the second cooling water pump is reduced, and the service life of the second cooling water pump is prolonged. The arrangement space needed