超临界/密相CO_(2)管道流量波动瞬态仿真计算模型  

Transient simulation model for flow fluctuation in supercritical/dense CO_(2) pipeline

作　　者：欧阳欣 李玉星[2] 路建鑫 柳歆 柴冲 贾启运 王武昌[2] 钱昊楠 OUYANG Xin;LI Yuxing;LU Jianxin;LIU Xin;CHAI Chong;JIA Qiyun;WANG Wuchang;QIAN Haonan(Pipe China Institute of Science and Technology;College of Pipeline and Civil Engineering, China University of Petroleum (East China)//Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety;CNOOC Research Institute Co.Ltd.)

机构地区：[1]国家管网集团科学技术研究总院分公司 [2]中国石油大学(华东)储运与建筑工程学院·山东省油气储运安全重点实验室 [3]中海油研究总院有限责任公司

出　　处：《油气储运》2024年第11期1231-1238,共8页Oil & Gas Storage and Transportation

基　　金：国家重点研发计划“战略性科技创新合作”专项“区域二氧化碳捕集与封存关键技术研发与示范”,2022YFE0206800;国家石油天然气管网集团有限公司重大科技攻关课题“超临界CO_(2)管道输送工艺与安全技术研究”,GWHT20220011708;中海石油(中国)有限公司“十四五”科技项目“海上CCUS上下游一体化技术研究”,KJGG-2022-12-CCUS-0103。

摘　　要：【目的】超临界/密相CO_(2)管道输送是CCUS中的重要环节,但气源产出不稳定、终端用量波动等原因,会引起CO_(2)管道内部介质水力热力参数的动态响应,持续或较大幅度波动可能造成管道和设备失稳。目前针对超临界/密相CO_(2)管道输送水力热力计算模型以稳态计算与经济评价为主,瞬态计算模型较为欠缺。【方法】基于流体力学基本守恒方程,结合CO_(2)相特性特点,建立一维含杂质超临界/密相CO_(2)管道流量波动瞬态仿真计算模型,并对该模型进行数值求解计算,实现了不同流量瞬变工况的管道沿程水力热力参数变化规律动态仿真,并将模型与行业瞬态仿真软件OLGA进行了对比分析。【结果】超临界/密相CO_(2)管道流量波动瞬态仿真计算模型与OLGA软件的计算结果趋势一致,模型计算压力、温度响应略高于OLGA计算结果,二者对于出口温度、压力响应相对变化量的计算差距在2%以内,满足工程计算精度要求。同时,在瞬态计算过程中,与OLGA软件相比,新建模型更加稳定,不会出现数值突变现象,可用于超临界/密相CO_(2)管道流量瞬变工况温压动态响应预测。【结论】针对超临界/密相CO_(2)管道建立的一维管道流量波动瞬态仿真模型与OLGA软件模拟结果对比发现,该模型计算精度较高,研究成果可为CO_(2)管道设计与工艺仿真软件国产化提供理论支撑。(图6,表4,参27)[Objective] Supercritical/dense-phase CO_(2) pipeline transmission serves as a crucial component in Carbon Capture,Utilization,and Storage(CCUS) technology.However,various factors,such as unstable gas source outputs or terminal consumption fluctuations,induce dynamic responses of internal mediums,expressed by variations in their hydraulic and thermal parameters.Continuous or significant fluctuations can potentially result in pipeline and equipment instability.Existing hydraulic and thermal calculation models for supercritical/dense-phase CO_(2) pipeline transmission predominantly focus on steady-state calculations and economic evaluations,resulting in a deficiency of transient calculation models.[Methods] Based on the fundamental conservation equations of fluid mechanics and taking into account the properties of CO_(2) phases,a one-dimensional transient simulation calculation model was established to capture flow fluctuations within supercritical/dense-phase CO_(2) pipelines containing impurities.Following this,numerical calculations were conducted to solve this model,producing dynamic simulation results that shed light on the changing rules of hydraulic and thermal parameters along the pipeline under transient conditions at varying flow rates.A comparative analysis was performed between this model and OLGA,another industrial transient simulation software.[Results] The results from the proposed model exhibited trends consistent with those from OLGA.The pressure and temperature responses calculated by the model were marginally higher than those produced by OLGA.The differences in the relative variations of outlet temperature and pressure responses calculated using the two tools remained within 2%,thereby meeting the accuracy requirements for engineering calculations.Furthermore,in the process of transient calculations,the model exhibited higher reliability than OLGA,attributed to the absence of numerical oscillations.Consequently,the proposed model proved proficient in predicting dynamic responses in temperature a

关 键 词：管道 CCUS 超临界/密相CO_(2) 瞬态 数值仿真 

分 类 号：TE832[石油与天然气工程—油气储运工程]