Membrane-based processes have gained a relevant role in many engineering applications. Much effort has been devoted to thoroughly understand the fundamental phenomena behind them. However, membrane deformation has been taken into consideration only recently, although much evidence has shown its impacts in many applications. This work presents a novel 2-D, multi-scale, semi-empirical process model able to predict the behavior and the performance of Electrodialysis (ED) systems in cross-flow configurations in the presence and absence of local membrane deformations. The model exploits the results and the simulation approaches of previous fluid-structure investigations performed by the authors. Low-scale numerical simulations are coupled with a high-scale model to predict the redistribution of channel height, flow rate, friction coefficient and Sherwood number in ED stacks caused by local membrane deformations. Finally, salt and water fluxes, mass balances and electrochemical quantities are computed to assess the performances of cross-flow ED stacks. Different test cases have been simulated for the desalination of seawater by two-stage ED. Interestingly, membrane deformation is found to reduce, albeit slightly, the energy consumption. More pronounced effects are expected if thinner or less stiff membranes are used.

Battaglia G., Gurreri L., Ciofalo M., Cipollina A., Bogle I.D.L., Pirrotta A., et al. (2021). A 2-D model of electrodialysis stacks including the effects of membrane deformation. DESALINATION, 500 [10.1016/j.desal.2020.114835].

A 2-D model of electrodialysis stacks including the effects of membrane deformation

Battaglia G.;Gurreri L.
;
Ciofalo M.;Cipollina A.;Pirrotta A.;Micale G.
2021

Abstract

Membrane-based processes have gained a relevant role in many engineering applications. Much effort has been devoted to thoroughly understand the fundamental phenomena behind them. However, membrane deformation has been taken into consideration only recently, although much evidence has shown its impacts in many applications. This work presents a novel 2-D, multi-scale, semi-empirical process model able to predict the behavior and the performance of Electrodialysis (ED) systems in cross-flow configurations in the presence and absence of local membrane deformations. The model exploits the results and the simulation approaches of previous fluid-structure investigations performed by the authors. Low-scale numerical simulations are coupled with a high-scale model to predict the redistribution of channel height, flow rate, friction coefficient and Sherwood number in ED stacks caused by local membrane deformations. Finally, salt and water fluxes, mass balances and electrochemical quantities are computed to assess the performances of cross-flow ED stacks. Different test cases have been simulated for the desalination of seawater by two-stage ED. Interestingly, membrane deformation is found to reduce, albeit slightly, the energy consumption. More pronounced effects are expected if thinner or less stiff membranes are used.
Settore ICAR/08 - Scienza Delle Costruzioni
Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi Chimici
Settore ING-IND/19 - Impianti Nucleari
Battaglia G., Gurreri L., Ciofalo M., Cipollina A., Bogle I.D.L., Pirrotta A., et al. (2021). A 2-D model of electrodialysis stacks including the effects of membrane deformation. DESALINATION, 500 [10.1016/j.desal.2020.114835].
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0011916420315137-main.pdf

Solo gestori archvio

Descrizione: Articolo principale
Tipologia: Versione Editoriale
Dimensione 3.17 MB
Formato Adobe PDF
3.17 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Manuscript_Pre_print.pdf

accesso aperto

Descrizione: Pre print
Tipologia: Pre-print
Dimensione 2.17 MB
Formato Adobe PDF
2.17 MB Adobe PDF Visualizza/Apri
Post_print_Manuscript.pdf

Solo gestori archvio

Descrizione: Post_print
Tipologia: Post-print
Dimensione 2.2 MB
Formato Adobe PDF
2.2 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/474492
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact