Cryogenic fluid transfer tunnel assembly and method

摘要

The present invention relates to a cryogenic fluid transfer tunnel (10), such as a liquefied natural gas (LNG) transfer tunnel, comprising a lining jacket (20) comprising within a cryogenic fluid carrier line (30); one or more utility lines (40); one or more voids (50) comprising cryogenic insulating material (60); one or more relief lines (70) for removing vapour from void; one or more vapour return lines (80); and wherein said cryogenic fluid transfer tunnel does not comprise a recirculation line. A method of installing such a tunnel and a method of cooling a cryogenic fluid carrier line in such a tunnel is also disclosed.