Search results for "Profiled Membrane"

showing 4 items of 14 documents

Investigation of Reverse ElectroDialysis Units by Multi-Physical Modelling

2016

Reverse electrodialysis (RED) is an electrochemical membrane process that converts the salinity gradient energy between two solutions into electric current, by using ion exchange membranes. A novel multi-physical approach for RED modelling is proposed. 2-D simulations of one cell pair with tertiary current distribution (Nernst–Plank equation and local electroneutrality) were performed. Moreover, the Donnan exclusion theory was implemented for simulating double layer phenomena. Transport phenomena and electrochemical behavior were well described. The influence of membrane/channel configuration, dilute concentration and feeds velocity on the process performance was assessed. For a dilute conc…

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciSettore ING-IND/25 - Impianti ChimiciSettore ING-IND/06 - FluidodinamicaReverse electrodialysis multi-physics profiled membranes spacersSettore ING-IND/19 - Impianti Nucleari
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Membrane Deformation and Its Effects on Flow and Mass Transfer in the Electromembrane Processes

2019

In the membrane processes, a trans-membrane pressure (TMP) may arise due to design features or operating conditions. In most applications, stacks for electrodialysis (ED) or reverse electrodialysis (RED) operate at low TMP (&lt

Work (thermodynamics)Chemical Phenomenareverse electrodialysis02 engineering and technologyCFD; electrodialysis; fluid-structure interaction; ion exchange membrane; mass transfer; pressure drop; profiled membrane; reverse electrodialysis; structural mechanics;Physical Phenomenalcsh:ChemistryFluid dynamicsBiology (General)lcsh:QH301-705.5SpectroscopyGeneral MedicineMechanicsElectrodialysis021001 nanoscience & nanotechnologyComputer Science ApplicationsChemistry0210 nano-technologyTransport phenomenaCFDreverse electrodialysiion exchange membraneSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciMaterials scienceQH301-705.5fluid-structure interactionComputational fluid dynamicsDeformation (meteorology)CatalysisArticleInorganic Chemistry020401 chemical engineeringstructural mechanicsReversed electrodialysisMass transfermass transferstructural mechanic0204 chemical engineeringPhysical and Theoretical ChemistryelectrodialysisMolecular BiologyQD1-999Settore ING-IND/19 - Impianti NucleariMechanical Phenomenapressure dropprofiled membranebusiness.industryOrganic ChemistryMembranes Artificiallcsh:Biology (General)lcsh:QD1-999electrodialysiHydrodynamicsbusinessSettore ICAR/08 - Scienza Delle Costruzioni
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Multi-physical modelling of reverse electrodialysis

2017

Abstract Reverse electrodialysis (RED) is an electrochemical membrane process that directly converts the energy associated with the concentration difference between two salt solutions into electrical energy by means of a selective controlled mixing. The physics of RED involves the interaction of several phenomena of different nature and space-time scales. Therefore, mathematical modelling and numerical simulation tools are crucial for performance prediction. In this work, a multi-physical modelling approach for the simulation of RED units was developed. A periodic portion of a single cell pair was simulated in two dimensions. Fluid dynamics was simulated by the Navier-Stokes and continuity …

Work (thermodynamics)EngineeringSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciSettore ING-IND/25 - Impianti ChimiciGeneral Chemical EngineeringAnalytical chemistry02 engineering and technology020401 chemical engineeringStack (abstract data type)Reversed electrodialysisFluid dynamicsPerformance predictionGeneral Materials Science0204 chemical engineeringSettore ING-IND/19 - Impianti NucleariWater Science and TechnologyComputer simulationPlane (geometry)business.industryMechanical EngineeringGeneral ChemistryMechanics021001 nanoscience & nanotechnology6. Clean waterMembraneReverse electrodialysis multi-physical model finite element method power density profiled membranesSettore ING-IND/06 - Fluidodinamica0210 nano-technologybusiness
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Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

2019

In electro-membrane processes, a pressure difference may arise between solutions flowing in alternate channels. This transmembrane pressure (TMP) causes a deformation of the membranes and of the fluid compartments. This, in turn, affects pressure losses and mass transfer rates with respect to undeformed conditions and may result in uneven flow rate and mass flux distributions. These phenomena were analyzed here for round pillar-type profiled membranes by integrated mechanical and fluid dynamics simulations. The analysis involved three steps: (1) A conservatively large value of TMP was imposed, and mechanical simulations were performed to identify the geometry with the minimum pillar density…

ion exchange membraneMass fluxSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciMaterials scienceGeneral Computer Sciencereverse electrodialysisFlow (psychology)fluid-structure interaction02 engineering and technologyDeformation (meteorology)Computational fluid dynamicsElectrodialysilcsh:QA75.5-76.95Theoretical Computer Sciencestructural mechanics020401 chemical engineeringMass transferReverse electrodialysimass transferFluid dynamicselectrodialysis0204 chemical engineeringSettore ING-IND/19 - Impianti Nuclearipressure dropprofiled membranebusiness.industryApplied MathematicsMechanics021001 nanoscience & nanotechnologyVolumetric flow rateMembraneModeling and Simulationlcsh:Electronic computers. Computer scienceSettore ICAR/08 - Scienza Delle CostruzioniCFD0210 nano-technologybusinessComputation
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