Analysis of the Performance of FLNG Vessels According to Basic Design Parameters
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Natural gas is an alternative energy to oil, which has gained attention and investments in the offshore market recently. For exploration, storage and transport, due to its unique characteristics, it requires to be processed at Floating Liquefied Natural Gas platforms (FLNG). The main differences from the traditional oil FPSOs platforms are the presence of a larger processing plant and of thermal insulated specialized tanks, both intrinsically related to the need to liquefy natural gas at extremely low temperature. Besides the challenges of installing an LNG processing plant onto a floating structure, the FLNG design process presents several challenges due to maritime requirements (stability and structural) as well as to operational characteristics. The present work, based on a parametric synthesis model development, aims to compare single viable FLNG platforms obtained by numerical simulations of different dimensional and arrangement parameters or cargo and ballast conditions and evaluating its performance regarding production and storage capacity and operational downtime. Given a set of input parameters, varying for a range of typical values, the numerical program performs the FLNG design in agreement with established international rules considering topside layout, volume and weight distribution, cargo and ballast filled conditions, intact stability conditions, longitudinal and transversal structural specifications, and seakeeping analysis. The results are compared and analyzed for a typical production level and storage capacity, highlighting that the parametric model approach is usually applied to the conceptual design with the objective to provide basic performance indicators on viable solutions for the client’s decision process.
KeywordsFLNG Model test LNG tanks
The authors acknowledge Frade Japão Petróleo Ltda for the financial support and for the motivation of this work.
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