Thermal associated pressure-retarded osmosis processes for energy production: A review

Einarsson, Sigurður; Wu, Bing

doi:10.1016/j.scitotenv.2020.143731

Cited by 17 publications

(7 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1 illustrates an energy generation system using a PRO membrane unit. This system is a closed-loop PRO (Anastasio, et al, 2015;Einarsson, et al, 2021) and is referred to as an osmotic heat engine (McGinnis, et al, 2007). In the PRO membrane unit, volume flow occurs due to osmotic pressure originating from the low-concentration solution (feed solution) to the high-concentration solution (draw solution) through a semipermeable membrane.…”

Section: Discussionmentioning

confidence: 99%

Energy generation characteristics of pressure retarded osmosis using polymer solution

Bando

Otomo

SUZUKI

et al. 2022

JFST

View full text Add to dashboard Cite

Research on energy generation characteristics based on pressure retarded osmosis (PRO) using seawater is being widely carried out. However, there are few studies that use polymer solutions. Therefore, the purpose of this study is to evaluate energy generation characteristics when using a polymer solution. We established a PRO model with a constant hydrostatic pressure difference in a semipermeable membrane, through which pure water permeates into the polymer solution side. The concentration of the polymer solution was determined by solving the one-dimensional convection-diffusion equation, and the osmotic pressure difference in the semipermeable membrane was evaluated. The following four dimensionless parameters were derived by making the basic equations dimensionless; the dimensionless second virial coefficient , the dimensionless hydrostatic pressure difference p*, the Péclet number Pe, and the cross-sectional area reduction ratio of the tube on the solution side . The generation characteristics of dimensionless power densities were evaluated by changing the  representing the properties of the polymer solution. The value of p* for which the largest dimensionless power density obtained was 0.5 or more, and approached 1 as  increased. When compared with seawater, the power density while using polymer solution was smaller than that while using seawater. However, by preventing the temporal decrease in the concentration of the polymer solution and the generation of a concentration boundary layer, it is possible to significantly improve the power density and obtain a power density close to that of seawater. In addition, when the membrane used for standard PRO is applied to the present model, a commerciallevel power density can be obtained.

show abstract

Section: Discussionmentioning

confidence: 99%

Energy generation characteristics of pressure retarded osmosis using polymer solution

Bando

Otomo

SUZUKI

et al. 2022

JFST

View full text Add to dashboard Cite

show abstract

“…Then, PRO models were developed considering finite element approaches employed to describe axial variations in concentration [3], different membrane types [8], detrimental phenomena, including ICP, ECP, and RSF [10]. The mathematical model for tracking the maximum power density is described and demonstrated above, so here is a brief review [3,[8][9][10]14].…”

Section: Pressure Retarded Osmosis Modelmentioning

confidence: 99%

“…The detailed parameters of the membrane parameters in a PRO system under different operational temperatures are previously investigated and studied in [16,17]. In the PRO system, the temperature gradient on the heterogeneous membrane causes heat transfer inside the membrane and along the membrane surface [14]. Previous modelling and experimental studies illustrated that the temperature improvement in the feed and draw solution can simultaneously increase the osmotic pressure, the water permeability (A), solute permeability (B), diffusion coefficient (D), and mass transfer coefficient (𝑘 ) [18].…”

Section: Scenario 1: Variations In the Operating Temperaturementioning

confidence: 99%

A Boosted Particle Swarm Method for Energy Efficiency Optimization of PRO Systems

Chen

Gou

2021

Energies

View full text Add to dashboard Cite

The analytical solutions of complex dynamic PRO systems pose challenges to ensuring that maximum power can be harvested in stable, rapid, and efficient ways in response to varying operational environments. In this paper, a boosted particle swarm optimization (BPSO) method with enhanced essential coefficients is proposed to enhance the exploration and exploitation stages in the optimization process. Moreover, several state-of-the-art techniques are utilized to evaluate the proposed BPSO of scaled-up PRO systems. The competitive results revealed that the proposed method improves power density by up to 88.9% in comparison with other algorithms, proving its ability to provide superior performance with complex and computationally intensive derivative problems. The analysis and comparison of the popular and recent metaheuristic methods in this study could provide a reference for the targeted selection method for different applications.

show abstract

“…Osmotic energy is generated upon the water passes through semipermeable membrane and mixes with the draw solution in the FO process (R. Pattle, 1954). Recent years, osmotic energy has attracted increasing interest because it is a new clean energy that can be sustainably generated with no constraints of the meteorological and geographical conditions (Einarsson and Wu, 2021;Shi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Engineering pressure retarded osmosis membrane bioreactor (PRO-MBR) for simultaneous water and energy recovery from municipal wastewater

Liu

Song

Meng

et al. 2022

Science of The Total Environment

View full text Add to dashboard Cite

Thermal associated pressure-retarded osmosis processes for energy production: A review

Cited by 17 publications

References 93 publications

Energy generation characteristics of pressure retarded osmosis using polymer solution

Energy generation characteristics of pressure retarded osmosis using polymer solution

A Boosted Particle Swarm Method for Energy Efficiency Optimization of PRO Systems

Engineering pressure retarded osmosis membrane bioreactor (PRO-MBR) for simultaneous water and energy recovery from municipal wastewater

Contact Info

Product

Resources

About