文章摘要
CO2地质封存过程中的传热特性研究
Heat transfer Modeling of CO2in the wellbore and aquifer during geological sequestration
投稿时间:2018-12-04  修订日期:2018-12-13
DOI:
中文关键词: 碳捕集与封存  热力学模型  数值模拟  焦耳汤姆孙效应
英文关键词: Carbon capture and storage  Thermodynamic model  Numerical simulation  Joule-Thomson effect
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
张倩 大连理工大学 395079358@qq.com 
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中文摘要:
      碳捕集与封存(CCS)技术使得大规模减少CO2排放变得可行,充分预测CO2的状态对于实际工程安全有效地开展是十分必要的,现有模型普遍将井筒注入和咸水层封存视为两个单独的阶段。本文通过数值模拟的方法建立了井筒注入和咸水层封存的联合模型,分析不同注入条件对于CO2在整体封存过程中传热特性的影响。研究表明,焦汤效应、地层温度及井筒热阻是影响温度变化的主要原因,进而影响冷却域范围,高温或低压注入会抑制焦汤冷却效应。
英文摘要:
      Carbon Capture and Storage is the key to reduce carbon dioxide emissions, which can be used in the practical project. It’s extremely important to understand the thermal properties of CO2 during the project for keeping a large number of CO2 safely. In previous research, the wellbore injection and storage into saline which should be an integrated system are modeled as two independent stages. In this paper, we built a united wellbore-aquifer model to simulate the heat transfer of fluid in the reservoir. Meanwhile analysis was obtained through comparing the results under different conditions. It shows that the Joule-Thomson cooling effect, the formation temperature and the wellbore thermal resistance are the key reasons to affect temperature. The fluid temperature has an influence on the spatial extent of cooling and the radial location where the minimum temperature occurs. During the injection process, higher temperature and lower pressure may suppress the cooling effect.
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