CFD prediction of concentration polarization phenomena in spacer-filled channels for Reverse Electrodialysis

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72 Citazioni (Scopus)

Abstract

Salinity Gradient Power generation through Reverse Electrodialysis (SGP-RE) is a promising technology to convert the chemical potential difference of a salinity gradient into electric energy. In SGP-RE systems, as in most membrane processes, concentration polarization phenomena may affect the theoretical driving force and thus the performance of the process. Operating conditions, including the feed solution flow rate and concentration and the channels’ geometrical configuration, may greatly influence both the polarization effect and the pumping energy consumption. The present work uses CFD to investigate the dependence of concentration polarization and pressure drop on flow rate, feeds concentration, current density and spacer features. Concentration polarization effects were found to be significant at low feed solution concentration (river water), but only secondary at higher concentrations (seawater and brine), thus suggesting that different optimization strategies should be employed depending on the feeds concentration. The features that a spacer-filled channel should possess for high efficiency and high current density SGP-RE applications were identified.
Lingua originaleEnglish
pagine (da-a)133-148
Numero di pagine16
RivistaJournal of Membrane Science
Volume468
Stato di pubblicazionePublished - 2014

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electrodialysis
Electrodialysis
Salinity
charge flow devices
spacers
Computational fluid dynamics
Polarization
Power generation
polarization
salinity
predictions
Current density
Flow rate
gradients
Chemical potential
Seawater
Rivers
Pressure drop
Energy utilization
flow velocity

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cita questo

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title = "CFD prediction of concentration polarization phenomena in spacer-filled channels for Reverse Electrodialysis",
abstract = "Salinity Gradient Power generation through Reverse Electrodialysis (SGP-RE) is a promising technology to convert the chemical potential difference of a salinity gradient into electric energy. In SGP-RE systems, as in most membrane processes, concentration polarization phenomena may affect the theoretical driving force and thus the performance of the process. Operating conditions, including the feed solution flow rate and concentration and the channels’ geometrical configuration, may greatly influence both the polarization effect and the pumping energy consumption. The present work uses CFD to investigate the dependence of concentration polarization and pressure drop on flow rate, feeds concentration, current density and spacer features. Concentration polarization effects were found to be significant at low feed solution concentration (river water), but only secondary at higher concentrations (seawater and brine), thus suggesting that different optimization strategies should be employed depending on the feeds concentration. The features that a spacer-filled channel should possess for high efficiency and high current density SGP-RE applications were identified.",
author = "Alessandro Tamburini and Michele Ciofalo and Luigi Gurreri and Micale, {Giorgio Domenico Maria} and Andrea Cipollina",
year = "2014",
language = "English",
volume = "468",
pages = "133--148",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",

}

TY - JOUR

T1 - CFD prediction of concentration polarization phenomena in spacer-filled channels for Reverse Electrodialysis

AU - Tamburini, Alessandro

AU - Ciofalo, Michele

AU - Gurreri, Luigi

AU - Micale, Giorgio Domenico Maria

AU - Cipollina, Andrea

PY - 2014

Y1 - 2014

N2 - Salinity Gradient Power generation through Reverse Electrodialysis (SGP-RE) is a promising technology to convert the chemical potential difference of a salinity gradient into electric energy. In SGP-RE systems, as in most membrane processes, concentration polarization phenomena may affect the theoretical driving force and thus the performance of the process. Operating conditions, including the feed solution flow rate and concentration and the channels’ geometrical configuration, may greatly influence both the polarization effect and the pumping energy consumption. The present work uses CFD to investigate the dependence of concentration polarization and pressure drop on flow rate, feeds concentration, current density and spacer features. Concentration polarization effects were found to be significant at low feed solution concentration (river water), but only secondary at higher concentrations (seawater and brine), thus suggesting that different optimization strategies should be employed depending on the feeds concentration. The features that a spacer-filled channel should possess for high efficiency and high current density SGP-RE applications were identified.

AB - Salinity Gradient Power generation through Reverse Electrodialysis (SGP-RE) is a promising technology to convert the chemical potential difference of a salinity gradient into electric energy. In SGP-RE systems, as in most membrane processes, concentration polarization phenomena may affect the theoretical driving force and thus the performance of the process. Operating conditions, including the feed solution flow rate and concentration and the channels’ geometrical configuration, may greatly influence both the polarization effect and the pumping energy consumption. The present work uses CFD to investigate the dependence of concentration polarization and pressure drop on flow rate, feeds concentration, current density and spacer features. Concentration polarization effects were found to be significant at low feed solution concentration (river water), but only secondary at higher concentrations (seawater and brine), thus suggesting that different optimization strategies should be employed depending on the feeds concentration. The features that a spacer-filled channel should possess for high efficiency and high current density SGP-RE applications were identified.

UR - http://hdl.handle.net/10447/96960

M3 - Article

VL - 468

SP - 133

EP - 148

JO - Journal of Membrane Science

JF - Journal of Membrane Science

SN - 0376-7388

ER -