Modeling pressure-retarded osmotic power in commercial length membranes

Naguib, Maged Fouad; Maisonneuve, Jonathan; Laflamme, C.; Pillay, Pragasen

doi:10.1016/j.renene.2014.11.048

Cited by 39 publications

(18 citation statements)

References 25 publications

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“…Recently, these models have been further modified to improve the accuracy of simulating the pilot-scale PRO systems: Kim et al [56] considered the variations of concentration and flow velocities along the membrane channel length, and Naguib et al [57] included the effect of ECP on the feed side, which to date had been ignored in small systems. Table 3 summarizes the noteworthy PRO model developments.…”

Section: Numerical Studies Regarding Promentioning

confidence: 99%

“…Table 3 summarizes the noteworthy PRO model developments.  Consideration of ICP, dilutive ECP, concentrative ECP (feed side), and variations of the concentrations and velocities along the membrane channel [57] As demonstration research on the PRO and PRO-hybrid processes is being actively performed worldwide, interests in numerical studies have been focused on estimating the harnessed energy from PRO by thermodynamic approaches and to simulate the process performances at a large-scale plant to consequently evaluate the economic feasibility of the PRO (Table 4).…”

Section: Numerical Studies Regarding Promentioning

confidence: 99%

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Recent Advances in Osmotic Energy Generation via Pressure-Retarded Osmosis (PRO): A Review

et al. 2015

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Global energy consumption has been highly dependent on fossil fuels which cause severe climate change and, therefore, the exploration of new technologies to produce effective renewable energy plays an important role in the world. Pressure-retarded osmosis (PRO) is one of the promising candidates to reduce the reliance on fossil fuels by harnessing energy from the salinity gradient between seawater and fresh water. In PRO, water is transported though a semi-permeable membrane from a low-concentrated feed solution to a high-concentrated draw solution. The increased volumetric water flow then runs a hydro-turbine to generate power. PRO technology has rapidly improved in recent years; however, the commercial-scale PRO plant is yet to be developed. In this context, recent developments on the PRO process are reviewed in terms of mathematical models, membrane modules, process designs, numerical works, and fouling and cleaning. In addition, the research requirements to accelerate PRO commercialization are discussed. It is expected that this article can help comprehensively understand the PRO process and thereby provide essential information to activate further research and development. OPEN ACCESSEnergies 2015, 8 11822

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Section: Numerical Studies Regarding Promentioning

confidence: 99%

Section: Numerical Studies Regarding Promentioning

confidence: 99%

Recent Advances in Osmotic Energy Generation via Pressure-Retarded Osmosis (PRO): A Review

et al. 2015

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“…Recently, He et al [20] developed a simple PRO model by considering the detrimental effects of ICP, ECP and reverse salt permeation (RSP) to evaluate the actual flux and power density of a PRO system and also to address the behavior of a PRO process at different applied pressures. Naguib et al [21], on the other hand, developed a mathematical model for PRO processes in commercial length hollow fiber membranes with respect to the effects of ICP, ECP and RSP. They found that the reduction in the concentration gradient due to polarization and axial variation was proportionately increased at high membrane flux.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Analytical Modeling of Pressure- Retarded Osmosis in a Parallel Flow Configuration for the Desalination Industry in the State of Kuwait

Al-Anzi

Thomas

2018

Sustainability

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The present study deals with the application of one-dimensional (1D) analytical expressions for a parallel flow configuration in pressure-retarded osmosis (PRO) exchangers by using actual brine and feed salinity values from the Kuwait desalination industry. The 1D expressions are inspired by the effectiveness-number of transfer unit (ε-NTU) method used in heat exchanger analysis and has been developed to "size" an osmotically-driven membrane process (ODMP) mass exchanger given the operating conditions and desired performance. The driving potentials in these mass exchangers are the salinity differences between feed and draw solution. These 1D model equations are employed to determine mass transfer units (MTU) as a function of different dimensionless groups such as mass flowrate ratio (MR), recovery ratio (RR), concentration factors (CF) and effectiveness (ε). The introduction of new dimensionless groups such as the dilution rate ratio (DRR) and dilution rate (DR) would be used to relate the actual water permeation to the brine draw stream. The results show that a maximum power of 0.28 and 2.6 kJ can be produced by the PRO system using seawater or treated wastewater effluent (TWE) as the feed solution, respectively, which might be able to reduce the power consumption of the desalination industry in Kuwait.

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“…They also investigated the overall membrane performance and identified the optimum operations of a PRO process based on ε-MTU model considering the CP effect [19]. Naguib et al developed two procedures for modelling PRO including bench-scale membrane samples and commercial scale processes [20]. According to the simulation of the two selected commercial length membranes, average power densities were 4.6 and 5.6 2 W/m [20].…”

Section: Introductionmentioning

confidence: 99%

“…Naguib et al developed two procedures for modelling PRO including bench-scale membrane samples and commercial scale processes [20]. According to the simulation of the two selected commercial length membranes, average power densities were 4.6 and 5.6 2 W/m [20]. In our previous study, a modelling framework of scaled-up PRO considering these detrimental effects is developed [21].…”

Section: Introductionmentioning

confidence: 99%

An evaluation of membrane properties and process characteristics of a scaled-up pressure retarded osmosis (PRO) process

Wang

Mujtaba

et al. 2016

Desalination

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E-mail: w.he@qmul.ac.uk, yang.wang@qmul.ac.uk, I.M.Mujtaba@Bradford.ac.uk, m.h.shaheed@qmul.ac.uk Abstract:This work presents a systematic evaluation of the membrane and process characteristics of a scaledup pressure retarded osmosis (PRO). In order to meet pre-defined membrane economic viability ( ≥ 5 W/m 2 ), different operating conditions and design parameters are studied with respect to the increase of the process scale, including the initial flow rates of the draw and feed solution, operating pressure, membrane permeability-selectivity, structural parameter, and the efficiency of the highpressure pump (HP), energy recovery device (ERD) and hydro-turbine (HT). The numerical results indicate that the performance of the scaled-up PRO process is significantly dependent on the dimensionless flow rate. Furthermore, with the increase of the specific membrane scale, the accumulated solute leakage becomes important. The membrane to achieve the optimal performance moves to the low permeability in order to mitigate the reverse solute permeation. Additionally, the counter-current flow scheme is capable to increase the process performance with a higher permeable and less selectable membrane compared to the co-current flow scheme. Finally, the inefficiencies of the process components move the optimal APD occurring at a higher dimensionless flow rate to reduce the energy losses in the pressurization and at a higher specific membrane scale to increase energy generation.

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Modeling pressure-retarded osmotic power in commercial length membranes

Cited by 39 publications

References 25 publications

Recent Advances in Osmotic Energy Generation via Pressure-Retarded Osmosis (PRO): A Review

Recent Advances in Osmotic Energy Generation via Pressure-Retarded Osmosis (PRO): A Review

One-Dimensional Analytical Modeling of Pressure- Retarded Osmosis in a Parallel Flow Configuration for the Desalination Industry in the State of Kuwait

An evaluation of membrane properties and process characteristics of a scaled-up pressure retarded osmosis (PRO) process

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