METHOD FOR DRIVING SYSTEM FOR SUPPLYING FUEL TO MARINE STRUCTURE HAVING RE-LIQUEFYING DEVICE AND HIGH-PRESSURE NATURAL GAS INJECTION ENGINE

The present invention relates to a method for driving a system for supplying fuel to a marine structure having a re-liquefying device for an evaporation gas and a high-pressure natural gas injection engine, such as an LNG carrier having an ME-GI engine mounted thereon, for efficiently supplying fuel to the high-pressure natural gas injection engine while minimizing the energy consumed by the re-liquefying device. According to the present invention, provided is the method for driving the system for supplying fuel to the high-pressure natural gas injection engine, comprising: an evaporation gas compression portion for receiving from a storage tank and compressing the evaporation gas that is generated from the storage tank; the re-liquefying device for receiving and liquefying the evaporation gas which is compressed in the evaporation compression portion; a high-pressure pump for compressing the liquefied evaporation gas, which is liquefied in the re-liquefying device; and a high-pressure vaporizer for vaporizing the liquefied evaporation gas which is compressed in the high-pressure pump, wherein the system for supplying fuel further comprises a recondenser, which is installed at the upstreat position of the high-pressure pump, and wherein a portion or all of the evaporation gas which is generated is recondensed in the recondenser by using the liquefied gas that is supplied from the storage tank, and wherein the sailing of a ballast further comprises a time for supplying and recondensing all of the evaporation gas and halting the operation of the re-liquefying device.