| 摘要 |
The present invention relates to an LNG supply system including a fuel supply line connected to both of a main engine and a sub engine from an LNG storage tank; a pump formed on the fuel supply line and pressing LNG discharged from the LNG storage tank at high pressures; a first heat exchange device formed on the fuel supply line between the main engine and pump, heat-exchanging the LNG supplied from the pump with glycol water, and supplying the heat-exchanged LNG to the main engine; a second heat exchange device formed on the fuel supply line between the sub engine and LNG storage tank, heat-exchanging the LNG supplied from the LNG storage tank with the glycol water, and supplying the heat-exchanged LNG to the sub engine; a glycol circulation line supplying the glycol water to the first and second heat exchange devices and providing heat to the LNG; and a glycol tank storing the glycol water. The glycol circulation line is characterized by being branched from the lower part of the glycol tank and connected to intake ports of the first and second heat exchange devices. The LNG supply system according to the present invention, which is a system operating the main and sub engines, includes the heat exchange devices heating LNG supplied to both engines and improves the circulation line of the glycol water supplied to the heat exchange devices, thereby reducing production cost. Furthermore, the LNG supply system according to the present invention integrally manages the glycol water by using one glycol tank without separate glycol tanks for each of a high-pressure heat exchange device and a low-pressure heat exchange device, thereby remarkably improving the efficiency of operating the system. |
