For the operation of turbine in a ship, heat exchange is a critical component to ensure the normal running of the turbine. It is necessary to maintain a certain suitable temperature to ensure the normal operation of the machinery when the turbine is running. Plate heat exchanger has been widely used and become one of the indispensable equipments of ship.

For instance, heat exchangers are used in main and auxiliary engine lubricating oil coolers, cylinder liner fresh water coolers, fuel heaters, steam condensers, feed water heaters and other equipment.However, the special working environment of the ship has very strict requirements on the heat exchanger. The special environment includes various factors that are unstable on the sea surface, and may encounter working conditions such as vibration, shock, large angle inclination and noise.The heat transfer medium of marine heat exchanger is generally oil and water.The cooling medium is generally seawater, which has a high concentration of salt, high humidity in the working environment, and corrosiveness to the plates. Due to the space of the ship itself is very compact, the room and quality occupied by the heat exchanger are more strictly limited. The emergence of heat exchangers has effectively solved a large extent of the problem.