Print Email Facebook Twitter Downtime assessment of exposed LNG terminals: A tool for determining limiting conditions Title Downtime assessment of exposed LNG terminals: A tool for determining limiting conditions Author Veen, E.J. Contributor Massie, W.W. (mentor) Veale, D. (mentor) Van der Molen, W. (mentor) Ligteringen, H. (mentor) Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2003-05-01 Abstract The downtime of a jetty terminal is one of the key factors in the planning and design of the onshore facilities. Long waiting times (downtime) due to restricting environmental conditions should be avoided. During the first design phase of a berth for Liquefied Natural Gas carriers many alternatives are open but no detailed calculations have yet been made for the analysis of ship motions and line forces. A rapid assessment tool, e.g. in the form of a nomogram, ca be helpful to give the designer a quick estimate of the expected downtime of the several alternatives without having to perform detailed (model) studies. This will help the designer to quickly oversee the implications of his first berth layout alternatives with relatively little effort. First a literature study has been performed after which computer simulations have been carried out in order to study the behavior of LNG vessels, moored to a jetty. For the simulations use was made of the Time Domain simulation program Termsim 11. A first version of the rapid assessment tool has been developed. For this study a 130.000 m3 LNG tanker has been chosen, with a specific jetty mooring layout and a constant underkeel clearance. Since so many factors influence the behavior of a moored LNG carrier it appears that a nomogram is not the most suitable tool for the calculation of downtime. Therefor a different tool form has been designed. The main advantage of this tool is that it is able to include an unlimited number of parameters. The rapid downtime assessment tool is a "website based tool", which gives the maximum line forces and the maximum manifold movements for a given set of environmental conditions. The current version is designed for a specific case. However, this limitation can easily be overcome by adding different scenarios to the existing data set. Subject LNG terminaldowntime To reference this document use: http://resolver.tudelft.nl/uuid:2ec43b79-3fb2-4f46-bee0-0e0ac8ac4a38 Part of collection Student theses Document type master thesis Rights (c) 2003 Veen, E.J. Files PDF Veen_E.J.pdf 28.04 MB PDF Veen-2003-WaveForces.pdf 6.88 MB Close viewer /islandora/object/uuid:2ec43b79-3fb2-4f46-bee0-0e0ac8ac4a38/datastream/OBJ1/view