| 摘要 |
PROBLEM TO BE SOLVED: To optimize boil-off gas treatment and energy consumption depending on the operation state of a liquefaction gas carrier by using a high-pressure gas compressor and a high-pressure liquid pump in combination.SOLUTION: A first fuel gas supply line 14 is provided for supplying boil-off gas (BOG) in a cargo oil tank 11 via a high-pressure gas compressor 13 to a main engine 12 as fuel gas; a second fuel gas supply line 21 is provided for creating high-pressure gas by sucking liquefaction gas in the cargo oil tank 11 with a pump 22 using a high-pressure liquid pump 24 and a gas heater 25; in a sailing during the liquefaction gas loading, when the fuel gas is sufficient with only BOG, only the first fuel gas supply line 14 is used, and when the fuel gas is insufficient, the second fuel gas supply line 21 is used together; and in a sailing during the empty cargo, when a spray operation is not performed, only the second fuel gas supply line 21 is used.SELECTED DRAWING: Figure 1 |
