Hydrodynamic considerations for FLNG concepts

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dc.contributor.author Clauss, GF en
dc.contributor.author Mavrakos, SA en
dc.contributor.author Sprenger, F en
dc.contributor.author Testa, D en
dc.contributor.author Dudek, M en
dc.date.accessioned 2014-03-01T02:53:18Z
dc.date.available 2014-03-01T02:53:18Z
dc.date.issued 2011 en
dc.identifier.uri http://hdl.handle.net/123456789/36226
dc.subject.other Cargo tanks en
dc.subject.other Drift motion en
dc.subject.other Free fluids en
dc.subject.other Frequency shift en
dc.subject.other High energy densities en
dc.subject.other Intact stability en
dc.subject.other Liquid motion en
dc.subject.other Marine locations en
dc.subject.other Motion behavior en
dc.subject.other Multi-body en
dc.subject.other Re-gasification en
dc.subject.other Resonant tanks en
dc.subject.other Surge motions en
dc.subject.other Transfer period en
dc.subject.other Transport distances en
dc.subject.other Vessel motions en
dc.subject.other Arctic engineering en
dc.subject.other Gas supply en
dc.subject.other Hulls (ship) en
dc.subject.other Liquefied natural gas en
dc.subject.other Natural frequencies en
dc.subject.other Natural gas transportation en
dc.subject.other Tanks (containers) en
dc.subject.other Tankers (ships) en
dc.title Hydrodynamic considerations for FLNG concepts en
heal.type conferenceItem en
heal.identifier.primary 10.1115/OMAE2011-50132 en
heal.identifier.secondary http://dx.doi.org/10.1115/OMAE2011-50132 en
heal.publicationDate 2011 en
heal.abstract The current demand in liquefied natural gas (LNG) encouraged the design of various concepts for floating LNG (FLNG) liquefaction or regasification facilities. With increasing transport distance, e.g. from remote marine locations to the onshore gas supply net, gas pipelines become uneconomic compared to shuttle carriers for LNG (LNGC). Due to its high energy density, offshore transfer from processing terminals to carriers and from carriers back to receiving terminals has to be analyzed in detail. During the transfer period, free fluid surfaces occurring in the cargo tanks of the LNGC are leading to a significant decrease of the initial intact stability and altered motion behavior. This paper focusses on the influence of resonant tank sloshing on the LNGC's roll and surge motions. Analyses of transverse and longitudinal sloshing yield a surprising phenomenon: the frequency shift Dw between the theoretical natural frequency of the tank alone and the respective motion peak for a vessel with four tanks mounted to the hull. Force measurements between tank and hull reveal a peak at the tank's natural frequency that causes strong liquid motions with related forces and moments on the hull but no increased vessel motions. Additional investigations comprise the offloading situation with a multi-body arrangement of LNGC and a FLNG (the MPLS20 system) in tandem and briefly also in side-by-side configuration. The slow drift motions on the turretmoored FLNG are exemplarily investigated in head seas. Copyright © 2011 by ASME. en
heal.journalName Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE en
dc.identifier.doi 10.1115/OMAE2011-50132 en
dc.identifier.volume 1 en
dc.identifier.spage 723 en
dc.identifier.epage 735 en

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