Numerical simulation of flow structures in a rotary type energy recovery device

Liu, Kai; Deng, Jianqiang; Ye, Fanghua

doi:10.1016/j.desal.2018.10.016

Cited by 21 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unsteady and incompressible three-dimensional Reynolds-averaged Navier− Stokes (RANS) equation was solved, and the heat transfer during the system operation was ignored. According to Liu, 21 numerical simulation results obtained using the realizable k−ε turbulence model agreed well with the experimental PIV data of a rotating energy recovery system. Therefore, the realizable k−ε turbulence model was used herein.…”

Section: Theoretical and Simulation Methodologiessupporting

confidence: 62%

Investigation of the Mixing Rate and Channel Volume Efficiency of a Self-Driven Rotary Energy Recovery Device in the Reverse Osmosis System

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The mixing problem of the rotary energy recovery device (RERD) adversely affects the reverse osmosis desalination process. The influence of working conditions on the inflow length and mixing rate in a self-driven hydraulic RERD was studied by analyzing the mass transfer mechanism in the rotor channels via computational fluid dynamics (CFD) simulation. The feasibility and reliability of the simulation were experimentally verified. Channel volume efficiency was defined to analyze the inflow status of channels and the mixing behavior. The simulation data exhibited a linear relationship between the inflow length and the ratio of the flow rate and rotary speed, and the mixing rate represented the quadratic function of the channel volume efficiency. The results indicated that the proposed mathematical model of the inflow length and mixing rate is valid. This model in conjunction with the variation relationship between the rotary speed and the flow rate of the self-driven RERD can help considerably improve the mixing problem of the RERD in the design stage, thus reducing the testing cost.

show abstract

Section: Theoretical and Simulation Methodologiessupporting

confidence: 62%

Investigation of the Mixing Rate and Channel Volume Efficiency of a Self-Driven Rotary Energy Recovery Device in the Reverse Osmosis System

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Meanwhile, the heat transfer was ignored because of the slight discrepancy in temperature between the two streams. In order to capture the strong unsteadiness to reveal the mechanism of the mixing motion and flow fields in ducts during the working process of RERDs, the Realizable k-ε (RKE) turbulence was used in this study, which had been confirmed by PIV experiments that it could give a more accurate result compared with standard k-ε and RNG k-ε turbulence models (Liu et al, 2019). The pressure-based solver and the second-order upwind scheme were selected for the calculation method.…”

Section: Methodsmentioning

confidence: 99%

“…The experimental results presented that a high turbulence intensity caused by the vortex formation and generation would be observed in ducts. From the numerical results, the vortex formation and generation would also influence the mixing transfer process (Liu et al, 2019). The swirling flow and the vortex were observed in the mixing zone, causing a high turbulence intensity in the ducts.…”

Section: Introductionmentioning

confidence: 97%

Influence of structural and operating factors on mixing transfer of rotary energy recovery device through CFD simulation

Liu

Zhang

et al. 2023

Front. Energy Res.

Self Cite

View full text Add to dashboard Cite

The rotary energy recovery device (RERD) is an essential component in seawater desalination for decreasing the energy consumption of reverse osmosis plants. To research the complex flow fields and mixing motion in ducts of a rotary energy recovery device, a 3D numerical simulation was studied in this work. Three-dimensional vortex structures were visualized and identified based on the Q criterion. The effects of the operating condition and the structure parameter on the flow fields and the mixing motion had been discussed. Simulation results indicated that the interaction between vortices in the mixing zone and vortices in the duct entrance led to a high level of turbulence intensity and mixing degree. The mixing process could be controlled by the operating condition and the structure parameter. This paper provides a new approach to researching structural and operating factors on the mixing process of the rotary energy recovery device.

show abstract

“…Since there is no physical piston between the seawater flow and the concentrated brine flow in the pipeline, rotating ERDs are considered to be upgraded devices that can achieve very high energy recovery efficiencies. [ 22 ] Lou et al [ 23 ] found that the integrated energy recovery and pressurization device taught to reduced electrical energy consumption by 25.7% compared to a conventional ERD and achieved a maximum energy recovery efficiency and mixing rate of 91.3% and 4.97%, respectively, for the desalination process by rationally setting the rotor conduit displacement.…”

Section: Membrane Technologies For Energy‐savingmentioning

confidence: 99%

Membrane Technology for Energy Saving: Principles, Techniques, Applications, Challenges, and Prospects

Osman,

Chen,

Elgarahy

et al. 2024

Adv Energy and Sustain Res

View full text Add to dashboard Cite

Membrane technology emerges as a transformative solution for global challenges, excelling in water treatment, gas purification, and waste recycling. This comprehensive review navigates the principles, advantages, challenges, and prospects of membrane technology, emphasizing its pivotal role in addressing contemporary environmental and sustainability issues. The goal is to contribute to environmental objectives by exploring the principles, mechanisms, advantages, and limitations of membrane technology. Noteworthy features include energy efficiency, selectivity, and minimal environmental footprint, distinguishing it from conventional methods. Advances in nanomembranes, organic porous membranes, and metal‐organic frameworks‐based membranes highlight their potential for energy‐efficient contaminant removal. The review underscores the integration of renewable energy sources for eco‐friendly desalination and separation processes. The future trajectory unfolds with next‐gen nanocomposite membranes, sustainable polymers, and optimized energy consumption through electrochemical and hybrid approaches. In healthcare, membrane technology reshapes gas exchange, hemodialysis, biosensors, wound healing, and drug delivery, while in chemical industries, it streamlines organic solvent separation. Challenges like fouling, material stability, and energy efficiency are acknowledged, with the integration of artificial intelligence recognized as a progressing frontier. Despite limitations, membrane technology holds promise for sustainability and revolutionizing diverse industries.

show abstract

Numerical simulation of flow structures in a rotary type energy recovery device

Cited by 21 publications

References 16 publications

Investigation of the Mixing Rate and Channel Volume Efficiency of a Self-Driven Rotary Energy Recovery Device in the Reverse Osmosis System

Investigation of the Mixing Rate and Channel Volume Efficiency of a Self-Driven Rotary Energy Recovery Device in the Reverse Osmosis System

Influence of structural and operating factors on mixing transfer of rotary energy recovery device through CFD simulation

Membrane Technology for Energy Saving: Principles, Techniques, Applications, Challenges, and Prospects

Contact Info

Product

Resources

About