Fuel gas supply system and method of an lng carrier
AssigneeDaewoo Shipbuilding & Marine Engineering Co., Ltd.
InventorsJung Han Lee, Dong Kyu Choi, Hyun Ki Park
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Abstract
A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system includes a boil-off gas reliquefaction apparatus for reliquefying boil-off gas generated in the LNG tank.
Claims3
A fuel gas supply system of a vessel for supplying fuel gas from an LNG tank, which stores LNG as fuel gas, to a high-pressure gas injection engine, the fuel gas supply system comprising:
- a boil-off gas liquefaction line configured to extract boil-off gas generated in the LNG tank;
- a compressor installed in the boil-off gas liquefaction line to compress the boil-off gas;
- a reliquefaction apparatus configured to reliquefy the compressed boil-off gas;
- a high-pressure pump configured to compress the reliquefied boil-off gas at a high pressure between about 200 to about 300 bar gauge pressure and supply the compressed reliquefied boil-off gas as fuel gas to the high-pressure gas injection engine;
- and
- a vaporizer configured to vaporize the reliquefied boil-off gas compressed by the high-pressure pump.
Dependencies are inferred from the claim text.