Device and method for providing liquefied natural gas

Abstract

An apparatus (100) for providing liquefied natural gas, referred to as LNG, comprises a boil-off gas buffer tank (105) comprising an inlet (110) adapted to receive boil-off gas of boil-off gas from athird party apparatus; a transfer means (115) for transferring the boil-off gas from the buffer tank to the LNG storage container (120); a compressor (140) located downstream of the transfer member (120) for compressing the boil-off gas; a boil-off gas transfer conduit (125) for transferring boil-off gas from the transfer member to the storage container; an LNG storage container; an LNG transfer line (130) for transferring LNG from the storage container to a third-party device; and a heat exchanger (135) for exchanging heat between the boil-off gas passing through the boil-off gas transfer line and the LNG passing through the LNG transfer line, the heat exchanger being configured to liquefy or cool the boil-off gas.

Description

technical field [0001] The invention relates to an apparatus and method for supplying liquefied natural gas. It finds particular application in the field of LNG supply for land and seagoing vessels. Background technique [0002] The environmental and economic advantages brought about by liquefied natural gas (hereinafter referred to as "LNG") compared with other fossil fuels have driven the rapid expansion of the use of LNG as a road or marine fuel. [0003] Typically, an LNG service station consists of an LNG receiving system, a cryogenic storage facility that allows LNG to be stored in a subcooled state at an operating pressure of 7 to 9 bar, a cryogenic pump that can transfer LNG, and a distribution system for refueling vehicles. [0004] Today, three classes of vehicles may be fueled with LNG: [0005] - The first category is fueled by cold LNG at a pressure of 3 bar; [0006] - the second category is fueled by saturated LNG at a pressure of 8 bar; and [0007] - The...

AI Technical Summary

Problems solved by technology

[0018] The "saturation in flight" system has the disadvantage of requiring very efficient but expensive exchangers as well as requiring a very complex control system, which raises the question of operational stability

[0019] Finally, a heavily saturated system cannot fuel vehicles operating at 3 bar pressure and reduces storage capacity and storage time

[0020] It should be noted that for stations with BOG liquefaction systems, these systems are expensive and have no potential return on investment

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