PDF下载

[1]程昱涵　李长俊　贾文龙　高谦　付仕雄　张雯琴.超临界相CO2输送管道经济流速计算方法[J].油气储运,2025,44(02):1-10.
　LI Changjun,CHENG Yuhan,JIA Wenlong,et al.Calculation of economic flow rate in supercritical phase CO2 transport pipeline[J].Oil & Gas Storage and Transportation,2025,44(02):1-10.

点击复制

超临界相CO₂输送管道经济流速计算方法

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 44 期数: 2025年02期页码: 1-10 栏目: 出版日期: 2025-02-25

Title:: Calculation of economic flow rate in supercritical phase CO₂ transport pipeline

作者:: 程昱涵　李长俊　贾文龙　高谦　付仕雄　张雯琴

Author(s):: LI Changjun; CHENG Yuhan; JIA Wenlong; GAO Qian; FU Shixiong; Zhang Wenqin

关键词:: 二氧化碳管道; 超临界相; 经济流速; 数学模型; 遗传算法

Keywords:: carbon dioxide pipeline; ; supercritical phase; economic flow ; velocity; mathematical modelling; genetic algorithm

文献标志码:: A

摘要:: 摘要：【目的】碳捕集、利用及封存技术（Carbon Capture, Utilization and Storage, CCUS）被广泛视为温室气体减排最佳解决方案之一，而管道输送是大规模、长距离输送CO₂的最佳选择。在超临界相CO₂管道输送过程中，当管输压力低于临界压力（7.38 MPa）时，CO₂会发生相变，导致管道发生冲蚀，影响CO₂的稳定输送和管道的安全运行。管道流速会影响CO₂管输压力，流速过低会增加压降，导致压力低于临界点，流速过高则会增大摩擦损失，增加能耗。同时流速与管径密切相关，影响管道建设和运行费用。因此，有必要研究超临界相CO₂输送管道的经济流速。【方法】以“增压站+管道”组合为研究对象，建立了计算CO₂管道经济流速的优化模型。模型以管道年投资总费用为目标函数，约束条件以保持单一相态输送的二氧化碳相态约束为基础，包含管道沿程压力约束、管道强度约束、管道稳定性约束。利用遗传算法对优化模型进行求解。【结果】通过设定一系列经济参数，绘制了超临界相CO₂输送管道各标准管径在输量1000~10000 t/d和增压站间距50~150 km情况下的管道年投资总费用和经济流速范围。在输量较小时，管道年投资总费用随管径增大呈现线性增加的趋势，输量不断增加时呈现先降低后升高的趋势；当管径一定时，输量越大其管道年投资总费用越大；管道经济流速随着输量增加呈现波动上升的趋势。同时分析了管材和电价对经济流速的影响。【结论】超临界相CO₂输送管道经济流速范围为1.1~2.35 m/s；电价显著影响经济流速，管道材料对经济流速的影响较弱。通过改变实例的运行参数，设计出9种运行方案，运用模型进行评价和优选，得到了最优方案，验证了经济流速的准确性。研究结果可为管道优化设计提供参考。

Abstract:: Abstract: [Purpose] Carbon Capture, Utilisation and Storage (CCUS) is widely regarded as one of the best solutions for greenhouse gas emission reduction. Pipeline transport is the best choice for large-scale and long-distance CO₂ transport. In the process of supercritical phase CO₂ pipeline transport, when the pipeline pressure is lower than the critical pressure (7.38 MPa), CO₂ will undergo a phase change, leading to erosion of the pipeline, which affects the stable transport of CO₂ and the safe operation of the pipeline. Pipeline flow rate will affect the CO₂ pipeline pressure, the flow rate is too low will increase the pressure drop, resulting in the pressure is lower than the critical point, the flow rate is too high will increase the friction loss, increase energy consumption. At the same time, the flow rate is closely related to the pipe diameter, which affects the pipeline construction and operation costs. Therefore, it is necessary to study the economic flow rate of supercritical phase CO₂ transport pipeline. [Methods] The optimisation model for calculating the economic flow rate of CO₂ pipeline is established by taking the combination of ‘booster station + pipeline’ as the research object. The model takes the total annual investment cost of the pipeline as the objective function, and the constraints are based on the constraints of the CO₂ phase state that maintains single-phase transport, including the constraints of the pipeline along the pressure, the constraints of the pipeline strength, and the constraints of the pipeline stability. The optimisation model was solved using genetic algorithm. [Results] By setting a series of economic parameters, the total annual investment cost of the pipeline and the range of economic flow rate for each standard pipe diameter of supercritical-phase CO₂ transport pipeline were plotted for a delivery capacity of 1000~10000 t/d and a booster station spacing of 50~150 km. When the transmission capacity is small, the total annual investment cost of the pipeline increases linearly with the increase of the pipeline diameter, and decreases and then increases when the transmission capacity increases; when the pipeline diameter is certain, the larger the transmission capacity is, the larger the total annual investment cost of the pipeline is; the economic flow rate of the pipeline fluctuates and rises with the increase of the transmission capacity. The influence of pipe material and electricity price on the economic flow rate is analysed. [Conclusion] The economic flow rate of supercritical-phase CO₂ pipeline ranges from 1.1 to 2.35 m/s; the electricity price has a significant influence on the economic flow rate, while the pipeline material has a weak influence on the economic flow rate. By changing the operation parameters of the example, nine operation schemes were designed, and the model was used for evaluation and preference, and the optimal scheme was obtained to verify the accuracy of the economic flow rate, which can provide a certain reference for the optimal design of the pipeline.

相似文献/References:

[1]陆诗建,张金鑫,高丽娟,等.不同管径和温压条件下的CO2管道输送特性[J].油气储运,2019,38(02):151.[doi:10.6047/j.issn.1000-8241.2019.02.005]
　LU Shijian,ZHANG Jinxin,GAO Lijuan,et al.pipeline transportation characteristics with different pipe diameters under different pressures & temperatures[J].Oil & Gas Storage and Transportation,2019,38(02):151.[doi:10.6047/j.issn.1000-8241.2019.02.005]
[2]胡其会　杨腾　苗青　列斯别克·,塔拉甫别克　李兆兰　范振宁.含杂质超临界CO2管道放空对管内温压变化的影响实验[J].油气储运,2024,43(05):1.
　HU Qihui,YANG Teng,MIAO Qing,et al.Experimental study on the influence of impurity containing supercritical CO2 pipeline venting on temperature and pressure changes inside the pipeline[J].Oil & Gas Storage and Transportation,2024,43(02):1.
[3]胡其会,杨腾,苗青,等.含杂质超临界CO2管道放空对管内温压变化的影响实验[J].油气储运,2024,43(09):985.[doi:10.6047/j.issn.1000-8241.2024.09.003]
　HU Qihui,YANG Teng,MIAO Qing,et al.Experimental study on the influence of venting on temperature and pressure changes in impurity-containing supercritical CO2 pipeline[J].Oil & Gas Storage and Transportation,2024,43(02):985.[doi:10.6047/j.issn.1000-8241.2024.09.003]

更新日期/Last Update: 2024-12-18