基于热流耦合仿真的全容式LNG储罐罐存精准计量方法  

Accurate measurement method of full capacity LNG storage tank based on heat flow coupling simulation

作　　者：柳智 牛淑昊 张岩[1] LIU Zhi;NIU Shuhao;ZHANG Yan(Sinopec Tianranqi Company,Beijing 100029,China)

机构地区：[1]中国石油化工股份有限公司天然气分公司,北京100029

出　　处：《工业计量》2025年第2期43-47,56,共6页Industrial Metrology

摘　　要：LNG接收站一般依据《GB/T 24962—2010冷冻烃类流体静态测量计算方法》对LNG储罐进行静态计量,但该方法忽略了热泄漏导致罐内LNG温度场分布不均的现象,导致罐存计算存在较大误差。文章以16万方全容式LNG储罐为例,基于Fluent软件对储罐内LNG温度场分布进行了模拟,分析分布规律,结合LTD(液位-温度-密度计)所测LNG温度与密度,建立LNG温度修正公式及密度修正公式。基于上述修正公式,提出了一种全容式LNG储罐罐存修正分层计量方法,并验证了其可靠性,有效提高LNG储罐罐存计算精度,解决了因热泄漏造成的罐存计算误差较大的难题。The LNG terminal generally carries out static measurement of LNG storage tanks according to《GB/T 24962—2010 calculation method for static measurement of frozen hydrocarbon fluids》,but this method ignores the uneven distribution of LNG temperature field in the tank caused by heat leakage,resulting in large errors in tank storage calculation.Taking 160000 m~3 full capacity LNG storage tank as an example,this paper simulates the LNG temperature field distribution in the tank based on FLUENT software,analyzes the distribution law,and establishes the LNG temperature correction formula and density correction formula combined with the LNG temperature and density measured by Ltd(liquid level temperature density meter).Based on the above correction formula,a modified layered metering method for full capacity LNG storage tank is proposed,and its reliability is verified,which effectively improves the calculation accuracy of LNG storage tank and solves the problem of large calculation error caused by heat leakage.

关 键 词：LNG储罐 全容式 罐存修正 温度修正 

分 类 号：TE972[石油与天然气工程—石油机械设备]