Progress in pressure retarded osmosis (PRO) membranes for osmotic power generation

Han, Gang; Zhang, Sui; Xue, Li; Chung, Tai‐Shung

doi:10.1016/j.progpolymsci.2015.04.005

Cited by 184 publications

(123 citation statements)

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“…The inverse quantity of the resistance is mass conductance, describing the ease with which a current of the permeation passes. Therefore, the MPP can be tracked by either comparing the instantaneous mass resistance ( /V P ) to the incremental mass resistance ( / PV  ) or comparing the instantaneous mass conductance ( / VP ) to the incremental mass conductance ( / VP  ), as shown in equation (3). In fact, the two comparisons are equivalent in mathematics and mass resistance, namely IMR, is selected in this study to calculate the slope of the PRO power curve.…”

Section: 1mentioning

confidence: 99%

“…Recently, Li et al developed a TFC polyetherimide PRO flat-sheet membrane which is able to maintain almost unchanged water flux and power density of 12.8 W/m 2 at 17.2 bar over 10 hours [2]. While maintaining a relatively small structural parameter to minimize ICP, enhancing membrane water permeability during the formation of polyamide layers and/or novel post-treatment is also important [3]. Cui et al optimized the interfacial polymerization reaction and alternative post-treatments, and fabricated a membrane with power density of 18.09 W/m 2 at 22 bar when using 1 M NaCl as draw solution and DI water as feed [4].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Cui et al optimized the interfacial polymerization reaction and alternative post-treatments, and fabricated a membrane with power density of 18.09 W/m 2 at 22 bar when using 1 M NaCl as draw solution and DI water as feed [4]. A comprehensive review of the development of the high performance PRO membranes can be found in [3].The process characteristics of the PRO and the optimization of the configuration and operation are the second step to develop practical applications taking advantages of the fabricated high performance membranes. Compared to the lab-scale PRO process, mass transfer of the water and salts across the membrane is highly affected by the increasing membrane usage and the hydrodynamic flows of the salinities.…”

mentioning

confidence: 99%

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Maximum power point tracking (MPPT) control of pressure retarded osmosis (PRO) salinity power plant: Development and comparison of different techniques

Luo

Kiselychnyk

et al. 2016

Desalination

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. (2016) Maximum power point tracking (MPPT) control of pressure retarded osmosis (PRO) salinity power plant : development and comparison of different techniques. Desalination,. Permanent WRAP URL:http://wrap.warwick.ac.uk/78938 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. Abstract:This paper presents two new methods for the maximum power point tracking (MPPT) control of a pressure retarded osmosis (PRO) salinity power plant, including mass feedback control (MFC) and fuzzy logic control (FLC). First, a brief overview of perturb & observe (P&O) and incremental mass resistance (IMR) control is given as those two methods have already demonstrated their merit in good control performance. Then, two new methods employing variable-step strategy, MFC and FLC, are proposed to address the trade-off relationship between rise-time and oscillation of P&O and IMR. Genetic Algorithm (GA) is used for finding the optimum parameters of membership functions of FLC. From the case-study of start-up of the PRO adopting MPPT control, MFC and FLC have shown faster convergence to the target performance without oscillation compared with P&O and IMR. These four MPPT techniques are further evaluated in case-studies of state transitions of the PRO due to operational fluctuations. It is proven that the MPPT using FLC and modified MFC has better performance than the other two methods. Finally, the paper reports a comparison of major characteristics of the four MPPT methods, which could be considered as guidance for selecting a MPPT technique for the PRO in practice. IntroductionPressure retarded osmosis (PRO) is a promising method which is potentially capable of producing power and processing water simultaneously because of its nature of combination of the water treatment and renewable energy generation. In other words, it can be used as not only a clean energy generator, but also a water treatment to recycle water. In a PRO plant, chemical potential between the two salinities is converted to hyd...

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Section: 1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Maximum power point tracking (MPPT) control of pressure retarded osmosis (PRO) salinity power plant: Development and comparison of different techniques

Luo

Kiselychnyk

et al. 2016

Desalination

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“…Emerging osmotically driven membrane processes, such as pressure retarded osmosis (PRO) and forward osmosis (FO), might provide sustainable solutions for the global need of clean energy [1,2]. Contrary to the pressure-driven membrane processes (e.g., reverse osmosis (RO), nanofiltration (NF), ultrafiltration), where intensive energy (pumping) are required to overcome the osmotic pressure of seawater, PRO and FO processes only require minimal external energy input for liquid circulation.…”

Section: Introductionmentioning

confidence: 99%

Sodium Tetraethylenepentamine Heptaacetate as Novel Draw Solute for Forward Osmosis—Synthesis, Application and Recovery

Long

Wang

2015

Energies

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Abstract:Osmotic energy, as a sustainable energy source with little environmental impact, has drawn much attention in both academia and industry in recent years. Osmotically driven membrane processes can harvest the osmotic energy and thus have great potential to produce sustainable clean water or electric energy. The draw solution, as an osmotic component, has been more and more explored by scientists in recent years in order to achieve a high osmotic pressure and suitable molecular size. In this work, a novel draw solute-sodium tetraethylenepentamine heptaacetate (STPH)-is synthesized and identified by nuclear magnetic resonance spectroscopy ( 1 H-NMR) and Fourier transform infrared (FTIR). Its solution properties are optimized in terms of the solution pH and concentration, and related to the forward osmosis (FO) performance. A water flux of 28.57 LMH and a low solute flux of 0.45 gMH can be generated with 0.5 g/mL STPH draw solution and de-ionized water (DI water) as the feed solution under pressure retarded osmosis (PRO) mode, which is superior to the FO performance with many other draw solutes reported. Further FO desalination test shows a stable water flux of 9.7 LMH with 0.3 g/mL STPH draw solution and 0.6 M NaCl feed solution. In addition, the draw solution recovery is also investigated.

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Sustainable Design and Model‐Based Optimization of Hybrid RO – PRO Desalination Process

Zhang

et al. 2020

Process Intensification and Integration for Sustainable Design

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Progress in pressure retarded osmosis (PRO) membranes for osmotic power generation

Cited by 184 publications

References 100 publications

Maximum power point tracking (MPPT) control of pressure retarded osmosis (PRO) salinity power plant: Development and comparison of different techniques

Maximum power point tracking (MPPT) control of pressure retarded osmosis (PRO) salinity power plant: Development and comparison of different techniques

Sodium Tetraethylenepentamine Heptaacetate as Novel Draw Solute for Forward Osmosis—Synthesis, Application and Recovery

Sustainable Design and Model‐Based Optimization of Hybrid RO – PRO Desalination Process

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