A simulation method for liquefaction process of floating LNG platform

Abstract

The invention discloses a simulation method of a floating liquefied natural gas platform liquidation process. According to the method, a solid structure 3D model and a gas-liquid two-phase flow 3D mode are built in a natural gas liquidation system are built, a solid structure original state is obtained through computing and serves as a boundary condition to be loaded into a gas-liquid two-phase flow original state, then computing is conducted on the whole natural gas liquidation system through a transient fluid-solid coupling method, and a dynamic simulation computed result of the floating platform natural gas liquidation process is obtained. By means of the simulation method, the gas-liquid two-phase liquid phase change process and the gas-liquid two-phase liquid flow process of the natural gas liquidation system can be simulated simultaneously under the action of ocean platform swaying, analysis and optimization can be conducted on an existing natural gas liquefaction technology and device, The simulation method is applicable to the ocean platform with the characteristics of large swaying, limited space, high safety requirements and the like.

Description

technical field [0001] The invention relates to the field of natural gas liquefaction, in particular to a simulation method for the liquefaction process of a floating liquefied natural gas platform. Background technique [0002] The natural gas liquefaction process is one of the key processes in the production of floating LNG platforms. Analyzing and optimizing the existing natural gas liquefaction processes and equipment to adapt to the characteristics of large sloshing, limited space, and high safety requirements on offshore platforms has always been a constraint on floating platforms. The key issues of low-cost, high-efficiency and stable operation of the LNG platform. Therefore, the research on this problem has become a very critical and important research topic in the field of liquefied natural gas research. [0003] The liquefaction system of the floating LNG platform generally adopts the process of cryogenic liquefaction, which lowers the temperature of natural gas b...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a simulation method for the liquefaction process of a floating liquefied natural gas platform, which improves the efficiency of simulation modeling of natural gas liquefaction, and solves the shortcomings of the prior art that the floating platform cannot be loaded and the natural gas liquefaction process cannot be dynamically described.

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