LNG双金属全容罐温度场参数化计算与分析

Parametric calculation and analysis of the temperature field indouble metal wall full containment LNG tank

为保证液化天然气(Liquefied Natural Gas, LNG)双金属全容罐绝热结构设计的合理性,有必要对LNG双金属全容罐进行温度场计算及分析。以某项目已建29 000 m3LNG双金属全容罐为例,基于有限元理论对LNG双金属全容罐进行温度场计算及分析,通过对比漏热量计算结果排除网格数量及边界条件对LNG双金属全容罐模型的影响,验证LNG双金属全容罐在操作工况绝热结构合理性及事故工况下热角保护结构稳定性,按照“建模、边界条件加载、求解及结果后处理”框架对温度场分析命令流进行参数化设计,实现LNG双金属全容罐温度场参数化计算目标,提高温度场分析计算效率。分析结果可为LNG双金属全容罐绝热结构设计提供指导。

To ensure the design rationality of the cold insulation structure for double metal wall full containment LNG tank,temperature field analysis and calculation are imperative.This study focuses on the example of a 29000 m 3 double metal wall full containment LNG tank constructed in a specific project,using finite element theory for the temperature field calculation and analysis.By comparing the calculation results of heat leakage,excluding the influence of the grid quantity and boundary conditions on the model,this study verifies the cold insulation structure effectiveness under operational conditions and the thermal corner protection stability under accidental scenarios for the double metal wall full containment LNG tank.The study further parameterizes the temperature field command flow following the“modeling,boundary condition loading,solution,and result post-processing”framework.This approach facilitates the parametric design of temperature field for double metal wall full containment LNG tank,enhancing the efficiency of analysis and calculation,and offers insights and guidance into the design of cold insulation structure for these tanks.