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{"title":"A study on decompression wave propagation characteristics during CO2 pipeline leakage with consideration of gas-liquid transition","authors":"Liu Bin, Li Kaixuan, Yu Zhipeng, Wang Zaizhou, Chen Wenjun","doi":"10.1002/ghg.2283","DOIUrl":null,"url":null,"abstract":"<p>Pipelines stand as the most cost-effective method for large-scale transportation of CO<sub>2</sub> from a source point to the storage site, especially over extensive distances. The potential for crack propagation following a pipeline rupture highlights the need for precise analysis of decompression wave propagation. To accurately model this, understanding the decompression wave's propagation laws becomes imperative. Although previous studies have predominantly focused on pipeline leaks within the dense phase or supercritical state, the transition from liquid to gas during leakage significantly affects the decompression wave propagation. When a gaseous CO<sub>2</sub> pipeline ruptures, the high Joule-–Thomson coefficient causes a swift temperature plunge, potentially leading to a gas–liquid transition. However, research on how this phase transition impacts the decompression wave characteristics is limited. To address this gap, this study proposes a transition computational fluid dynamics model to predict the decompression wave behavior. The model is validated with an industrial-scale full-bore rupture experiment. The results reveal that the gaseous CO<sub>2</sub> leakage induces a pressure plateau at a certain distance from the leakage due to the gas-liquid phase transition. The influences of initial conditions on this pressure plateau and decompression wave are also explored. This study provides valuable insights into understanding the decompression wave behaviors of gaseous CO<sub>2</sub> pipelines, which are essential for ensuring the safety and reliability of CO<sub>2</sub> transportation within the carbon capture and storage technology chain. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Greenhouse Gases: Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ghg.2283","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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Abstract
Pipelines stand as the most cost-effective method for large-scale transportation of CO2 from a source point to the storage site, especially over extensive distances. The potential for crack propagation following a pipeline rupture highlights the need for precise analysis of decompression wave propagation. To accurately model this, understanding the decompression wave's propagation laws becomes imperative. Although previous studies have predominantly focused on pipeline leaks within the dense phase or supercritical state, the transition from liquid to gas during leakage significantly affects the decompression wave propagation. When a gaseous CO2 pipeline ruptures, the high Joule-–Thomson coefficient causes a swift temperature plunge, potentially leading to a gas–liquid transition. However, research on how this phase transition impacts the decompression wave characteristics is limited. To address this gap, this study proposes a transition computational fluid dynamics model to predict the decompression wave behavior. The model is validated with an industrial-scale full-bore rupture experiment. The results reveal that the gaseous CO2 leakage induces a pressure plateau at a certain distance from the leakage due to the gas-liquid phase transition. The influences of initial conditions on this pressure plateau and decompression wave are also explored. This study provides valuable insights into understanding the decompression wave behaviors of gaseous CO2 pipelines, which are essential for ensuring the safety and reliability of CO2 transportation within the carbon capture and storage technology chain. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.
考虑气液转换的二氧化碳管道泄漏时减压波传播特性研究
管道是将二氧化碳从源点大规模运输到贮存地点的最具成本效益的方法,尤其是在长距离运输方面。管道破裂后裂缝传播的可能性突出表明,需要对减压波的传播进行精确分析。为了准确地建立模型,了解减压波的传播规律势在必行。虽然以往的研究主要集中在稠密相或超临界状态下的管道泄漏,但泄漏过程中从液态到气态的转变会极大地影响减压波的传播。当气态二氧化碳管道破裂时,高焦耳-汤姆森系数会导致温度急剧下降,从而可能导致气液转换。然而,关于这种相变如何影响减压波特性的研究还很有限。针对这一空白,本研究提出了一个过渡计算流体动力学模型来预测减压波的行为。该模型通过工业规模的全口径破裂实验进行了验证。结果表明,由于气液相变,气态二氧化碳泄漏会在距离泄漏点一定距离处产生压力高原。研究还探讨了初始条件对该压力高原和减压波的影响。这项研究为了解气态二氧化碳管道的减压波行为提供了宝贵的见解,这对于确保碳捕获与封存技术链中二氧化碳运输的安全性和可靠性至关重要。© 2024 化学工业协会和约翰-威利父子有限公司版权所有。
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