Method and apparatus for the regasification of lng onboard a...

F - Mech Eng,Light,Heat,Weapons – 17 – C

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F17C 13/08 (2006.01) B63J 2/14 (2006.01) F17C 1/00 (2006.01) F17C 7/04 (2006.01) F17C 9/04 (2006.01)

Patent

CA 2477446

An LNG carrier for transporting LNG from one location to another that includes a vaporizer (23) on board said LNG carrier for vaporizing the LNG to a gaseous state, one or more heat exchangers (21) at least partially submerged in seawater, an intermediate fluid circulating between the vaporizer (23) and said heat exchanger (21), and one or more pumps (22) for circulating said intermediate fluid is disclosed. A method of regasifying LNG while on board an LNG carrier is provided that includes circulating an intermediate fluid between a vaporizer (23) on board the LNG carrier and a submerged heat exchanger (21), heating the LNG to a temperature above its vaporization temperature using heat energy carried by said intermediate fluid and heating the intermediate fluid using heat energy supplied by the submerged or partially submerged heat exchanger (21).

L'invention concerne un méthanier destiné à transporter du GNL d'un endroit à un autre, qui comprend un vaporisateur (23) embarqué servant à réduire le GNL à l'état gazeux (25) par vaporisation; un ou plusieurs échangeur(s) thermique(s) (21) au moins partiellement immergé(s) dans l'eau de mer; un fluide intermédiaire circulant entre le vaporisateur (23) et ledit échangeur thermique (21); et une ou plusieurs pompe(s) (22) pour circuler ledit fluide intermédiaire. L'invention concerne un procédé de regazéification de GNL (24) à bord d'un méthanier, qui consiste à circuler un fluide intermédiaire entre un vaporisateur (23) embarqué dans le méthanier et un échangeur thermique immergé (21); à chauffer le GNL, à une température supérieure à sa température de vaporisation, avec l'énergie thermique véhiculée par ledit fluide intermédiaire; et à chauffer le fluide intermédiaire avec l'énergie thermique fournie par l'échangeur thermique immergé ou partiellement immergé .

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