| 摘要 |
PURPOSE:To transport LNG safely by producing LN2 at an LNG receiving base by utilizing a coldness of LNG, loading LNG on the LNG vessel, reliquefying by exchanging heat of BOG produced during transportation by the LNG vessel, as well as utilizing N2 gas as an anti-explosion gas. CONSTITUTION:LN2 is produced by utilizing coldness of LNG at an LNG receiving base or consumption base and loaded on a tank 11 inside the LNG carrier through a loading mouth 16. During the transportation of the LNG, BOG produced in the LNG tank 10 is exhausted from a top part of the tank 10 and after compressed by a compressor 12, it is reliquefied by a heat exchanger 21 in the LN2 tank 11. LN2 becomes N2 gas but a part of it is stored and used ass an anti-explosion gas. This construction prevents a pressure rise due to BOG on the LNG carrier to reliquefy, while at the same time to obtain the anti-explosion gas to enable the safe transportation.
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