LNG接收站蒸发计算状态方程选择

doi:10.11949/j.issn.0438-1157.20181103

化工学报 ›› 2018, Vol. 69 ›› Issue (S2): 31-37.DOI: 10.11949/j.issn.0438-1157.20181103

LNG接收站蒸发计算状态方程选择

李冉¹, 刘景俊², 李玉星¹, 尹悦², 朱建鲁¹, 陈文杰², 王武昌¹

1 中国石油大学(华东)储运与建筑工程学院, 山东青岛 266580;
2 中国石化青岛液化天然气有限责任公司, 山东青岛 266580

收稿日期:2018-09-28 修回日期:2018-10-05 出版日期:2018-12-31 发布日期:2018-12-31
通讯作者: 王武昌
基金资助:
中央高校基本科研业务费专项资金项目（14CX02207A）；国家自然科学基金项目（51504278）。

Selection of state equations for evaporation calculation in LNG receiving terminal

LI Ran¹, LIU Jingjun², LI Yuxing¹, YIN Yue², ZHU Jianlu¹, CHEN Wenjie², WANG Wuchang¹

1 College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China;
2 Qingdao LNG Co., Ltd., Sinopec, Qingdao 266580, Shandong, China

Received:2018-09-28 Revised:2018-10-05 Online:2018-12-31 Published:2018-12-31
Supported by:
supported by the Fundamental Research Funds for the Central Universities (14CX02207A) and the National Natural Science Foundation of China (51504278).

摘要/Abstract

摘要：

LNG物性参数是LNG接收站模型建立、工艺流程模拟计算及研究必不可少的基础数据。以国外实验数据为基础，采用Aspen HYSYS软件分析评价PR、SRK、LKP、BWRS状态方程对气液相组成、焓、密度等物性参数的预测结果，比选汽液相平衡和热力学参数的计算状态方程，建立了LNG接收站储罐蒸发模型，并比较了四种状态方程的准确度。结果表明：PR方程在汽液相平衡计算方面计算精度最高，相对误差为4.70%；LKP方程计算热力学参数最准确，预测误差为2.59%。综合考虑相平衡参数和热力学参数计算精度，PR方程精度最高，预测误差为3.77%。此外，PR方程对LNG储罐蒸发和储罐压力的模拟计算值与现场数据吻合度最好，因此LNG接收站蒸发计算推荐选用PR方程。研究结果对物性参数和LNG接收站蒸发计算状态方程的选择具有借鉴意义。

Abstract:

LNG physical parameters are the basis for the establishment of LNG receiving terminal model, process simulation calculation. Based on foreign experimental data, Aspen HYSYS software was used to analyze and evaluate the prediction accuracy of physical parameters such as density, enthalpy, and dew point of PR, SRK, LKP and BWRS equations, and evaluate the gas-liquid equilibrium and thermodynamic parameters calculation model. The tank evaporation model of the LNG receiving terminal was established to compare the accuracy of the four equations of state. The results showed that the PR equation had the highest prediction accuracy in the calculation of gas-liquid phase equilibrium, and the relative error was 4.70%. The most accurate thermodynamic parameters were calculated by LKP equation, and the prediction error was 2.59%. Considering the calculation accuracy of thermodynamic parameters and phase equilibrium parameters, the PR equation had the highest precision and the prediction error was 3.77%. In addition, the simulation results of evaporation and tank pressure by PR equation are in good agreement with the field data. Therefore, PR equation is recommended for evaporation calculation of LNG receiving station. The research results are useful for the selection of physical parameters and the equation of state for evaporation calculation of LNG receiving station.

中图分类号:

TH642

李冉, 刘景俊, 李玉星, 尹悦, 朱建鲁, 陈文杰, 王武昌. LNG接收站蒸发计算状态方程选择[J]. 化工学报, 2018, 69(S2): 31-37.

LI Ran, LIU Jingjun, LI Yuxing, YIN Yue, ZHU Jianlu, CHEN Wenjie, WANG Wuchang. Selection of state equations for evaporation calculation in LNG receiving terminal[J]. CIESC Journal, 2018, 69(S2): 31-37.

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LNG接收站蒸发计算状态方程选择

Selection of state equations for evaporation calculation in LNG receiving terminal

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