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System and process for transporting LNG by non-self-propelled marine LNG carrier

  • US 8,499,569 B2
  • Filed: 09/12/2005
  • Issued: 08/06/2013
  • Est. Priority Date: 09/13/2004
  • Status: Active Grant
First Claim
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1. A method of operating a marine liquefied natural gas (LNG) carrier in which LNG is carried in at least one tank, said method comprising:

  • removing gas composed of evaporated LNG from a vapor space of the at least one tank;

    feeding a first portion of the gas to at least one gas consuming prime mover of the LNG carrier;

    increasing a pressure of a second portion of the gas;

    re-liquefying the second portion of the gas by heat exchange; and

    feeding the re-liquefied second portion of the gas into the at least one tank in such a manner that some of the re-liquefied second portion of the gas evaporates as it is being fed into the at least one tank, whereby the vapor space of the at least one tank is cooled.

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