储罐内液化天然气热物性预测模型分析  

Analysis of Prediction Models for Thermophysical Performance of Liquefied Natural Gas in Storage Tanks

作　　者：李嘉浩 王寿喜[1] 王力 毛由頁 张学亮 刘思良 曹钰 LI Jiahao;WANG Shouxi;WANG Li;MAO Di;ZHANG Xueliang;LIU Siliang;CAO Yu(College of Petroleum Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,China;School of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Clean Energy Branch,CNOOC Energy Technology&Services,Tianjin 300452,China;Sinopec Yantai Longkou LNG Co.,Ltd.,Yantai,Shandong 264000,China)

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]西南石油大学石油与天然气工程学院,四川成都610500 [3]中海油能源发展股份有限公司清洁能源分公司,天津300452 [4]中石化烟台龙口液化天然气有限公司,山东烟台264000

出　　处：《西安石油大学学报（自然科学版）》2024年第3期94-102,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中石油重大科技项目(CQ2021B-26-5-5)。

摘　　要：为精确预测储罐内液化天然气状态及其热力学参数,使用DWSIM化工过程仿真软件,分析评价PR、LKP、GERG-2008状态方程在液体密度、气体密度、焓差与比热容4种热力学参数计算以及气液相平衡闪蒸过程分析中的精度。以天然气物性实验为参考,对比的混合物温度范围约为105~450 K,压力范围约为0.05~69 MPa。计算结果表明,GERG-2008状态方程在物性预测方面综合平均误差最小,约为2.1%。优选其分别计算并预测Nantes实验,La Spezia事故以及接收站设计过程中典型LNG的基础物性及混合后气液相的相关参数。研究结果可为接收站储罐内部流场的模拟分析提供一定的基础支撑。To accurately predict the state of LNG in the storage tank and its thermophysical parameters,the accuracy of PR,LKP,and GERG-2008 state equations in the calculation of four thermophysical parameters(liquid density,gas density,enthalpy difference and specific heat capacity)and the analysis of vapor-liquid equilibrium flash evaporation process was evaluated using a chemical process simulation software DWSIM.Taking the physical property experiment of natural gas as a reference,the temperature and pressure of the compared mixture are 105~450 K and 0.05~69 MPa.The calculation results indicate that the state equation in GERG-2008 has the smallest average error in the prediction of thermophysical parameters,which is about 2.1%.The GERG-2008 state equation can be used for calculating the thermophysical parameters of typical LNG in Nantes experiment,La Spezia accident and the design process of receiving terminals and predicting the relevant parameters of the vapor-liquid phase after mixing.The research results can provide reliable support for the simulation analysis of the flow field inside storage tanks.

关 键 词：液化天然气 热物理性质 状态方程 计算精度 预测分析 

分 类 号：TE89[石油与天然气工程—油气储运工程]