Youfei Tang, Zongliang Qiao, Yue Cao, Chengbin Zhang, Fengqi Si
{"title":"Lattice Boltzmann modeling for enhanced membrane separation of geothermal energy utilization","authors":"Youfei Tang, Zongliang Qiao, Yue Cao, Chengbin Zhang, Fengqi Si","doi":"10.1016/j.applthermaleng.2024.124912","DOIUrl":null,"url":null,"abstract":"<div><div>Reducing carbon emissions and utilizing geothermal energy via supercritical carbon dioxide extraction from reservoirs for direct power generation necessitates the removal of mixed vapor. A shell-tube hollow fiber membrane contactor, utilizing differential pressure and absorption fluid, is devised for vapor absorption. This membrane-based separation process encompasses a multicomponent multiphase system of supercritical carbon dioxide and water, water-salt transport, and mass transfer across the porous membrane. To investigate pore-scale mass transfer, a multicomponent multiphase pseudopotential lattice Boltzmann model is established, simulating carbon dioxide-water two-phase flow, coupled with a continuous species transfer model for salt behavior in the absorbent. Flow direction analysis reveals countercurrent flow as superior to cocurrent for vapor absorption. Augmenting the original membrane with equal macropore counts enhances mass transfer, with increasing size amplifying the effect. Macropore arrangements at constant porosity suggest minimizing resistance in the propagation path as crucial for mass transport improvement. A left-small-right-large macropore size gradient distribution outperforms its reverse counterpart, enhancing performance by approximately 20%. This is attributed to larger macropores in high-concentration regions facilitating localized vapor transport.</div></div>","PeriodicalId":8201,"journal":{"name":"Applied Thermal Engineering","volume":"260 ","pages":"Article 124912"},"PeriodicalIF":6.1000,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359431124025808","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Reducing carbon emissions and utilizing geothermal energy via supercritical carbon dioxide extraction from reservoirs for direct power generation necessitates the removal of mixed vapor. A shell-tube hollow fiber membrane contactor, utilizing differential pressure and absorption fluid, is devised for vapor absorption. This membrane-based separation process encompasses a multicomponent multiphase system of supercritical carbon dioxide and water, water-salt transport, and mass transfer across the porous membrane. To investigate pore-scale mass transfer, a multicomponent multiphase pseudopotential lattice Boltzmann model is established, simulating carbon dioxide-water two-phase flow, coupled with a continuous species transfer model for salt behavior in the absorbent. Flow direction analysis reveals countercurrent flow as superior to cocurrent for vapor absorption. Augmenting the original membrane with equal macropore counts enhances mass transfer, with increasing size amplifying the effect. Macropore arrangements at constant porosity suggest minimizing resistance in the propagation path as crucial for mass transport improvement. A left-small-right-large macropore size gradient distribution outperforms its reverse counterpart, enhancing performance by approximately 20%. This is attributed to larger macropores in high-concentration regions facilitating localized vapor transport.
期刊介绍:
Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application.
The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.