| 摘要 |
Liquefied Natural Gas (LNG) is converted to a superheated fluid at a temperature greater than 5°C by being passed under pressure through a train of first, second and third main heat exchange stages 10, 12 and 14 in series, in which the natural gas is heated by a circulating heat exhange fluid flowing in heat exchange circuits 16, 18 and 20, respectively. The heat exchange fluid condenses in the heat exchange stages 10 and 12 and is partially vaporised in subsidiary heat exhangers 28, 30 and 58 which are all typically heated by sea water flowing in open cycle. The heat exchange fluid in the circuits 16 and 18 may be propane. The heat exchange circuit 20 may also employ propane or, alternatively, a liquid such as water or a water-glycol mixture which does not change phase in the heat exchange stage 14. |
