摘要
利用特征线法对超临界CO_(2)的管道特殊工况进行了模拟,旨在让学生学习新的思维方式和技术手段,并将其用于解决实际问题。CO_(2)运输作为碳捕集、利用与封存(CCUS)技术中的中间环节,承担着将CO_(2)从捕集地输送到封存地的任务。其中最常用的运输方式是管道运输。该文建立了以质量、动量和能量守恒定律为基础的描述管道内一维气体流动的数学模型,采用特征线法进行求解,利用MATLAB编程计算,对CO_(2)管道进行了操作模拟。该过程能够使学生掌握特征线法,了解超临界CO_(2)管道运行规律,提高实验教学效果。
[Objective]To cultivate high-quality talents,a simulation of the special working conditions of a pipeline for supercritical using the characteristic line method has been designed.This approach aims to teach students new ways of thinking and technical methods,applying them to solve practical problems.Given that the main component of greenhouse gases is CO_(2),the development and implementation of carbon capture,utilization,and storage(CCUS)technology are vital to control global warming temperatures at 1.5℃.CO_(2) transportation,which plays a crucial role in CCUS technology,involves transporting CO_(2) from capture sites to storage sites,with pipeline transportation being a commonly used method.At present,the theoretical framework for controlling the special working conditions of supercritical CO_(2) pipelines is not yet mature enough,requiring a model to analyze parameter changes at each node over time to provide a reference for safe operation.[Methods]A mathematical model describing one-dimensional gas flow in the pipeline based on conservation laws of mass,momentum,and energy is established and solved using the eigenline method.This model is computed with MATLAB programming to simulate the CO_(2) pipeline operation.The eigenline method,known for its strong abstraction and cumbersome calculation process,is integrated into experimental teaching to help students learn and apply it to practical engineering problems.First,the model was verified against the gas transmission system model proposed by Kiuchi to verify its accuracy.Second,students were instructed to simulate the startup of the compressor,the opening and closing of the valve,and changes in the sub-transmission volume.[Results]The results showed that the established model can calculate changes in pressure,temperature,and flow rate at each node over time.Students gained a deep understanding of several key phenomena:when the compressor is suddenly started,parameter changes are more dramatic at nodes close to the gas source.Sudden opening and closing of valves cause pressure fluctuations,leading to a water shock effect caused by the propagation of pressure waves.Changes in sub-transmission volume result in corresponding changes in transmission volume,which eventually stabilize.[Conclusions]Through this process,students can fully grasp the principles and applications of the characteristic line method,gaining a deeper understanding of the laws of supercritical CO_(2)pipeline operation.Additionally,this simulation experiment can also trigger students'thinking and stimulate their interest and enthusiasm in solving engineering problems.By participating in practical operations and addressing real problems,students’professionalism and technical ability will be improved.This experimental teaching method can effectively enhance students’learning experience,providing a comprehensive and in-depth combination of theory and practice.
作者
朱建鲁
吴佳凌
胡其会
李玉星
ZHU Jianlu;WU Jialing;HU Qihui;LI Yuxing(National Virtual Simulation Experimental Teaching Center for Oil and Gas Storage and Transportation Engineering,China University of Petroleum(East China),Qingdao 266580,China)
出处
《实验技术与管理》
CAS
北大核心
2024年第7期217-221,共5页
Experimental Technology and Management
基金
研究生精品示范课建设项目(UPCYJP-2022-10)
研究生课程思政示范课程建设项目(UPCYKS-2023-03)。
关键词
特征线
CO_(2)管道
特殊工况
characteristic line
CO_(2)pipeline
special operating conditions
作者简介
朱建鲁(1985-),男,山东曲阜,博士,副教授,主要研究方向为液化天然气技术、多相管流及油气田集输技术,aaabccc@163.com。
