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首页> 外文会议>International offshore and polar engineering conference;ISOPE-2009 >Direct Time Domain Downtime Assessment for LNG Operations using Computer Cluster
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Direct Time Domain Downtime Assessment for LNG Operations using Computer Cluster

机译：使用计算机集群对LNG进行直接时域停机评估

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Time domain simulations are used extensively to assess the availabilityof offshore offloading operations, providing key input for assessing theeconomical viability and reliability of offshore LNG projects.Traditionally, wave scatter diagrams, RAOs or 'look-up tables' havebeen used for this, comprising assumptions which may be difficult tojustify. For free weathervaning structures, the relevant combinations ofwind, sea, swell and current conditions are virtually unlimited. Theuncertainties related to the approximated methods, together with theincreasing computing capabilities, has led to the development of anovel method for direct time domain calculation of the downtimeevents for several years of environmental data.The new approach provides much better insight in the downtimeevents, including occurrences of crossed conditions, beam swells andvarying vessel headings. The complete operation, including approach,berthing, tug operations, side-by-side offloading and departure, can bestudied with properly calibrated numerical models. Persistency andseasonality can be evaluated in a direct and consistent manner.For demonstration purposes the new method was applied for a genericFSRU offshore Rotterdam port (52N/3E). Actual floating LNGterminals will probably be located in more sheltered areas, but thechosen location has the advantage of being far outside the main coastaltraffic routes.
机译：时域模拟被广泛用于评估海上卸载作业的可用性，为评估海上LNG项目的经济可行性和可靠性提供了重要的投入。传统上，使用了波散布图，RAO或``查找表''，其中包括以下假设：可能难以调整。对于免费的风标建筑，风，海，浪和当前条件的相关组合实际上是无限的。与近似方法相关的不确定性以及计算能力的不断提高，导致开发了用于实时环境下停机时间事件数年的环境数据的anovel方法的开发。新方法为停机时间事件（包括事故的发生）提供了更好的洞察力。穿越条件，波束膨胀和船首向变化。完整的操作，包括进近，停泊，拖船操作，并排卸载和离场，都可以通过正确校准的数值模型来估算。可以直接一致地评估持久性和季节性。出于演示目的，该新方法应用于通用FSRU鹿特丹离岸港口（52N / 3E）。实际的浮动LNG接收站可能位于更多的避风港，但是选择的位置具有远离主要沿海交通路线的优势。

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