Numerical and experimental research on the integrated energy recovery and pressure boost device for seawater reverse osmosis desalination system

Lou, Fangli; Nie, Songlin; Yin, Fanglong; Wang, Lu; Ji, Hui; Ma, Zhiyan; Kong, Xiangle

doi:10.1016/j.desal.2021.115408

Cited by 20 publications

(4 citation statements)

References 38 publications

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“…The inflow rate and the rotation speed were two important operating factors affecting RERD performance (Yin et al, 2018;Xu et al, 2020;Lou et al, 2022). To research the influence of the inflow rate, Q in , on the fluid mixing process and the evolution process of the vortex, five cases of inflow rate were designed in this study listed in Table 2.…”

Section: Results Of Operating Factors Effectmentioning

confidence: 99%

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.

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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.

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Section: Results Of Operating Factors Effectmentioning

confidence: 99%

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.

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“…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

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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.

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“…This separation vortex structure could increase fluid instability, leading to a higher mass transfer rate in the center of the duct. According to previous research [26,27], the interface between the seawater and brine streams was located in the central region of the duct, known as the mixing zone. Increasing the mass transfer rate in the mixing zone would result in the transfer of salt from the brine stream to the seawater stream, eventually leading to a higher volumetric mixing rate of the device.…”

Section: The Control Effect Of Splitter Plates On the "Entrance Effect"mentioning

confidence: 99%

Numerical Investigation of the Influence of a Splitter Plate on Mixing Transfer in the Ducts of a Rotary Energy Recovery Device

Liu,

et al. 2023

JMSE

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The rotary energy recovery device (RERD) is integral in reducing energy consumption in desalination processes. The absence of a physical piston in RERD ducts allows salinity transfer from the brine to the seawater stream, which reduces RERD efficiency. To address this challenge, this study investigates the potential of utilizing splitter plates as a flow control technique to decrease the mixing degree within RERDs. Numerical simulations were performed to examine five different splitter plate configurations in RERD ducts in order to identify optimal designs for reducing the mixing degree. The analysis of internal streamlines and vortex distributions revealed that horizontal splitter plates positioned at the duct inlet effectively suppressed swirling flows, while splitter plates positioned at the center of the duct suppressed the formation of flow-induced vortices. This resulted in a more uniform salinity distribution and a reduction in the mass transfer rate between brine and seawater streams. The most significant reduction in the volumetric mixing rate was observed when employing cross-spread splitter plates positioned at the center of the duct. This paper presents an innovative method to reduce the mixing degree in the RERD.

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Numerical and experimental research on the integrated energy recovery and pressure boost device for seawater reverse osmosis desalination system

Cited by 20 publications

References 38 publications

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

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

Numerical Investigation of the Influence of a Splitter Plate on Mixing Transfer in the Ducts of a Rotary Energy Recovery Device

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