A simulation study with a new performance index for pressure-retarded osmosis processes hybridized with seawater reverse osmosis and membrane distillation

Chae, Sung Ho; Seo, Jangwon; Kim, Jihye; Kim, Young Mi; Kim, Joon Ha

doi:10.1016/j.desal.2018.07.019

Cited by 24 publications

(10 citation statements)

References 42 publications

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“…Since DF is a function with respect to Rec RO , the trend of N r/c can be tracked along the change of DF. In this figure, membrane performances: membrane A > membrane B > membrane C; C F,b,RO = 35, 000 ppm; η e = 0.90; and η p = 0.80 [25].…”

Section: Performance Indices For Evaluating a Complete Ro-pro Processmentioning

confidence: 94%

“…It should be noted that the dimensionless constants in the relations (i.e., a 1 , a 2 , b, and c) are determined in experimental procedures by separating a turbulence state (Equation 25), and a laminar state (Equation 26). Two newly emerged terms in Equations (25) and 26, Re and Sc, also represent dimensionless numbers, which are called the Reynolds number and the Schmidt number, respectively. These dimensionless numbers illustrate the physical and motional characteristics of fluids in a given system.…”

Section: Of 38mentioning

confidence: 99%

“…However, in order to maximize the energy recovery efficiency, it is necessary to consider not only the system parameters of RO such as Rec RO but also the system parameters of PRO. One of the PRO system parameters that should be considered when operating the RO-PRO hybridized process is called the dilutive factor (DF) and is defined as follows [25,80],…”

Section: Dilutive Factor Of the Pro Processmentioning

confidence: 99%

“…In another study, a dimensionless performance index was used to observe the energy efficiency trend of the RO-PRO hybridized process [25]. The dimensionless performance index is given as follows,…”

Section: Performance Indices For Evaluating a Complete Ro-pro Processmentioning

confidence: 99%

“…Meanwhile, some researchers such as Wei He had sought to maximize the efficiency of a PRO process by connecting the stand-alone PRO processes in series [22,23]. There were also other novel approaches expanding the scale of a PRO-hybridized process such as RO-membrane distillation-PRO [24,25]. However, most of the papers related to PRO-hybridized processes are dedicated to the RO-PRO process.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Simulation Studies Analyzing the Pressure-Retarded Osmosis (PRO) and PRO-Hybridized Processes

et al. 2019

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Pressure-retarded osmosis (PRO) is viewed as a highly promising renewable energy process that generates energy without carbon emissions in the age of the climate change regime. While many experimental studies have contributed to the quest for an efficiency that would make the PRO process commercially viable, computational modeling and simulation studies have played crucial roles in investigating the efficiency of PRO, particularly the concept of hybridizing the PRO process with reverse osmosis (RO). It is crucial for researchers to understand the implications of the simulation and modeling works in order to promote the further development of PRO. To that end, the authors collected many relevant papers and reorganized their important methodologies and results. This review, first of all, presents the mathematical derivation of the fundamental modeling theories regarding PRO including water flux and concentration polarization equations. After that, those theories and thermodynamic theories are then applied to depict the limitations of a stand-alone PRO process and the effectiveness of an RO-PRO hybridized process. Lastly, the review diagnoses the challenges facing PRO-basis processes which are insufficiently resolved by conventional engineering approaches and, in response, presents alternative modeling and simulation approaches as well as novel technologies.

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Section: Performance Indices For Evaluating a Complete Ro-pro Processmentioning

confidence: 94%

Section: Of 38mentioning

confidence: 99%

Section: Dilutive Factor Of the Pro Processmentioning

confidence: 99%

Section: Performance Indices For Evaluating a Complete Ro-pro Processmentioning

confidence: 99%