LAPSE:2018.0550
Published Article
LAPSE:2018.0550
Temperature and Velocity Effects on Mass and Momentum Transport in Spacer-Filled Channels for Reverse Electrodialysis: A Numerical Study
Zohreh Jalili, Jon G. Pharoah, Odne Stokke Burheim, Kristian Etienne Einarsrud
September 21, 2018
Concentration polarization is one of the main challenges of membrane-based processes such as power generation by reverse electrodialysis. Spacers in the compartments can enhance mass transfer by reducing concentration polarization. Active spacers increase the available membrane surface area, thus avoiding the shadow effect introduced by inactive spacers. Optimizing the spacer-filled channels is crucial for improving mass transfer while maintaining reasonable pressure losses. The main objective of this work was to develop a numerical model based upon the Navier⁻Stokes and Nernst⁻Planck equations in OpenFOAM, for detailed investigation of mass transfer efficiency and pressure drop. The model is utilized in different spacer-filled geometries for varying Reynolds numbers, spacer conductivity and fluid temperature. Triangular corrugations are found to be the optimum geometry, particularly at low flow velocities. Cylindrical corrugations are better at high flow velocities due to lower pressure drop. Enhanced mass transfer and lower pressure drop by elevating temperature is demonstrated.
Keywords
computational fluid dynamics modelling, mass transfer, reverse electrodialysis, spacer-filled channel, temperature effect
Suggested Citation
Jalili Z, Pharoah JG, Stokke Burheim O, Einarsrud KE. Temperature and Velocity Effects on Mass and Momentum Transport in Spacer-Filled Channels for Reverse Electrodialysis: A Numerical Study. (2018). LAPSE:2018.0550
Author Affiliations
Jalili Z: Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway; Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
Pharoah JG: Department of Mechanical and Materials Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
Stokke Burheim O: Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
Einarsrud KE: Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
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Journal Name
Energies
Volume
11
Issue
8
Article Number
E2028
Year
2018
Publication Date
2018-08-04
Published Version
ISSN
1996-1073
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PII: en11082028, Publication Type: Journal Article
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LAPSE:2018.0550
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doi:10.3390/en11082028
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Sep 21, 2018
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Calvin Tsay
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