Liquefied Natural Gas Supply System for Marine Vessel or Offshore Plant

PURPOSE: A LNG fuel supply system for ships is provided to easily control a balance of the total heat capacity by controlling the temperature of engine coolants using seawater even the seawater temperature is changed. CONSTITUTION: A LNG fuel supply system for ships comprises a LNG fuel tank(100), a high pressure pump(110), a high pressure carburetor(120), a high-pressure fuel gas vessel(130), a gas pressure control valve(131), and a gas condenser(150). The high pressure pump compresses LNG in the LNG fuel tank at the pressure required in a high-pressure gas injection engine(140). The high pressure carburetor supplies fuel gas to the high-pressure gas injection engine with vaporizing the compressed LNG. If the gas pressure in the high-pressure gas injection engine is changed, the high-pressure fuel gas vessel supplies the evaporative gas to the high-pressure gas injection engine in order to perform a gas buffering function. The gas pressure control valve controls the pressure of the high-pressure fuel gas vessel. The gas condenser is supplied with gas discharged from the gas pressure control valve and the evaporative gas generated from an upper part of the LNG fuel tank. The gas condenser returns the gas to the LNG fuel tank with condensing the gas.