Modeling of a forward osmosis and a pressure-retarded osmosis spiral wound module using the Spiegler-Kedem model and experimental validation

2016 ◽  
Vol 164 ◽  
pp. 182-197 ◽  
Author(s):  
Dinesh Attarde ◽  
Manish Jain ◽  
Sharad Kumar Gupta
Keyword(s):  
Experimental Validation ◽  
Forward Osmosis ◽  
Pressure Retarded Osmosis ◽  
Spiral Wound

scholarly journals Effect of fouling on performance of pressure retarded osmosis (PRO) and forward osmosis (FO)

2018 ◽  
Vol 565 ◽  
pp. 450-462 ◽  
Author(s):  
Endre Nagy ◽  
Imre Hegedüs ◽  
Emily W. Tow ◽  
John H. Lienhard V
Keyword(s):  
Forward Osmosis ◽  
Pressure Retarded Osmosis

scholarly journals A Review of CFD Modelling and Performance Metrics for Osmotic Membrane Processes

Membranes ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 285
Author(s):  
Kang Yang Toh ◽  
Yong Yeow Liang ◽  
Woei Jye Lau ◽  
Gustavo A. Fimbres Weihs
Keyword(s):  
Performance Metrics ◽  
Forward Osmosis ◽  
Cfd Modelling ◽  
Membrane Processes ◽  
Pressure Retarded Osmosis ◽  
Multi Scale ◽  
Scale Modelling ◽  
Computational Fluid Dynamics Cfd ◽  
And Performance ◽  
Module Performance

Simulation via Computational Fluid Dynamics (CFD) offers a convenient way for visualising hydrodynamics and mass transport in spacer-filled membrane channels, facilitating further developments in spiral wound membrane (SWM) modules for desalination processes. This paper provides a review on the use of CFD modelling for the development of novel spacers used in the SWM modules for three types of osmotic membrane processes: reverse osmosis (RO), forward osmosis (FO) and pressure retarded osmosis (PRO). Currently, the modelling of mass transfer and fouling for complex spacer geometries is still limited. Compared with RO, CFD modelling for PRO is very rare owing to the relative infancy of this osmotically driven membrane process. Despite the rising popularity of multi-scale modelling of osmotic membrane processes, CFD can only be used for predicting process performance in the absence of fouling. This paper also reviews the most common metrics used for evaluating membrane module performance at the small and large scales.

A simple modeling approach for a forward osmosis system with a spiral wound module

Desalination ◽  
2018 ◽  
Vol 433 ◽  
pp. 120-131 ◽  
Author(s):  
Jongmin Jeon ◽  
Jaehak Jung ◽  
Sangho Lee ◽  
Joon Young Choi ◽  
Suhan Kim
Keyword(s):  
Forward Osmosis ◽  
Modeling Approach ◽  
Simple Modeling ◽  
Spiral Wound

scholarly journals On the understanding and feasibility of “Breakthrough” Osmosis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jun Jie Wu ◽  
Robert W. Field
Keyword(s):  
High Power ◽  
Forward Osmosis ◽  
Solute Concentration ◽  
Pressure Retarded Osmosis ◽  
Permselective Membrane ◽  
Order Of Magnitude ◽  
Theoretical Paper ◽  
Salt Diffusion ◽  
Power Densities ◽  
Very High

Abstract Osmosis is the movement of solvent across a permselective membrane induced by a solute-concentration gradient. Now in ‘Forward Osmosis’ it is empirically observed that the diffusion of the solute is counter to that of the solvent i.e. there is so-called “reverse salt diffusion”. However it has been recently suggested, in a theoretical paper, that if allowance is made for minor deviations from ideal semi-permeability then operation in an overlooked mode of “breakthrough” osmosis would be possible and importantly it would yield relatively large rates of osmosis. A consequential prediction was that in “breakthrough mode”, Pressure-Retarded Osmosis (PRO) would generate very high power densities exceeding those in the conventional mode by one order of magnitude. The practicality of this suggestion was explored and necessarily questions were then raised regarding the foundation of the Spiegler-Kedem-Katchalsky model. Arising from: Yaroshchuk, A., Sci. Rep. 7, 45168 (2017); 10.1038/srep45168

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