Theoretical analysis and auxiliary experiment of the optimization of energy recovery efficiency of a rotary energy recovery device

Wu, Jianeng; Jin, Qiang; Wang, Yue; Tandon, Puja

doi:10.1016/j.desal.2017.03.038

Cited by 22 publications

(5 citation statements)

References 20 publications

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“…The upper limit of retentate pressure recovery efficiency used in this study is 95% given that the current pressure recovery device can achieve an efficiency of over 95% [ 58 , 59 ], whereas the pump efficiency could reach a practical limit of about 90% if the centrifugal pump type is used [ 58 , 60 ]. The improvement in the energy recovery efficiencies can be achieved by increasing the processing capacity of the pressure recovery device [ 61 ], or using a larger size of pump [ 58 , 59 ]. A higher energy recovery efficiency typically reduces the energy consumption as more energy can be recovered [ 58 , 59 , 60 ].…”

Section: Resultsmentioning

confidence: 99%

Performance of Hypersaline Brine Desalination Using Spiral Wound Membrane: A Parametric Study

et al. 2023

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Desalination of hypersaline brine is known as one of the methods to cope with the rising global concern on brine disposal in high-salinity water treatment. However, the main problem of hypersaline brine desalination is the high energy usage resulting from the high operating pressure. In this work, we carried out a parametric analysis on a spiral wound membrane (SWM) module to predict the performance of hypersaline brine desalination, in terms of mass transfer and specific energy consumption (SEC). Our analysis shows that at a low inlet pressure of 65 bar, a significantly higher SEC is observed for high feed concentration of brine water compared with seawater (i.e., 0.08 vs. 0.035) due to the very low process recovery ratio (i.e., 1%). Hence, an inlet pressure of at least 75 bar is recommended to minimise energy consumption. A higher feed velocity is also preferred due to its larger productivity when compared with a slightly higher energy requirement. This study found that the SEC reduction is greatly affected by the pressure recovery and the pump efficiencies for brine desalination using SWM, and employing them with high efficiencies (ηR ≥ 95% and ηpump ≥ 50%) can reduce SEC by at least 33% while showing a comparable SEC with SWRO desalination (<5.5 kWh/m3).

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Section: Resultsmentioning

confidence: 99%

Performance of Hypersaline Brine Desalination Using Spiral Wound Membrane: A Parametric Study

et al. 2023

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“…In the Formula (6), p p and p s are the static pressures on the working face and the blade back, respectively, and ρ is the fluid density. The distribution of the blade load along the streamline must satisfy the impulsive-free inlet and the Kuta condition for the outlet velocity [26], which is as follows:…”

Section: Inverse Design For Centrifugal Pumpmentioning

confidence: 99%

A Novel Design of Centrifugal Pump Impeller for Hydropower Station Management Based on Multi-Objective Inverse Optimization

Zhang,

Song

2023

Processes

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The impeller, regarded as the central component of a centrifugal pump, plays a pivotal role in dictating overall performance. Overcoming challenges arising from the complexity of design parameters and the time-intensive nature of the design process has been a persistent obstacle to widespread adoption. In this study, we integrated ANSYS-CFX 2023 software with innovative inverse design techniques to optimize the impeller design within a centrifugal pump system. Our investigation reveals groundbreaking insights, highlighting the significant influence of both blade load and shaft surface geometry on impeller performance. Notably, through load optimization, substantial enhancements in centrifugal pump efficiency were achieved, demonstrating improvements of 1.8% and 1.7% under flow conditions of 1.0 Q and 0.8 Q, respectively. Further, the efficiency gains of 0.44% and 0.36% were achieved in their corresponding flow conditions. The optimization of blade load and shaft surface configuration notably facilitated a more homogenized internal flow pattern within the impeller. These novel findings contribute substantively to the theoretical foundations underpinning centrifugal pump impeller design, offering engineers a valuable reference to elevate their performance. Our utilization of ANSYS-CFX software in conjunction with inverse design methodologies showcases a promising avenue for advancing impeller design, ultimately culminating in superior efficiency and performance for centrifugal pumps.

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“…The evaluation process showed an improvement in membrane permeability and a decrease in the viscosity of the water with increase in feedwater temperature (Hills et al, 2021), where water permeability improved by 3% for every one degree Celsius temperature rise in the feed seawater, while the quality of the freshwater produced decreased with the increase in the feed seawater temperature (Atab et al, 2016). The efficiency of both the pumps and the energy recovery device results in a decrease in the viscosity of the feedwater with an increase in its temperature (Wu et al, 2017). Karellas et al (2011) evaluated the performance of a reverse osmosis desalination system supported by hybrid photovoltaic panels-the organic solar Rankine cycle suitable in remote areas.…”

Section: Countrymentioning

confidence: 99%

Performance analysis and techno-economic assessment of a developed cooling/preheating small PVT-RO desalination plant

Bacha,

Abdullah,

Alqasir

et al. 2023

Front. Energy Res.

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Middle East and North Africa (MENA) countries are experiencing rapid population growth, so water and electricity consumption plays a crucial role in the sustainable development of these countries. To overcome the water scarcity and electricity problems facing the MENA region, the developed cooling/preheating small PVT-RO desalination plants have been proposed as a practical solution. To achieve sustainable water and energy development in the MENA region, this study presents a commendable and highly efficient renewable energy project for freshwater production and electricity generation to solve the energy crisis and water scarcity in the MENA countries. Therefore, this study aims to develop a cooling/preheating small PVT-RO desalination plant to facilitate freshwater supply to remote regions and produce electricity. This was done by connecting photovoltaic/thermal (PVT) collectors with reverse osmosis (RO) desalination systems, where seawater is used as a medium to cool photovoltaic cells to increase electric power generation and at the same time recover thermal energy and use it in the initial heating of feed seawater before it is fed into the RO plants, thus increasing its productivity. The results indicate that using the photovoltaic thermal panels as preheating units will lead to a 0.135 kWh/m3 reduction in the rate of specific electricity consumption for the RO desalination plant, as well as increase the electricity generation from PVT panels by a rate of 8%. The economic feasibility presented that the proposed developed cooling/preheating small PVT-RO desalination plant represents an effective technology that reduced the freshwater cost by a rate of 49.5%.

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Theoretical analysis and auxiliary experiment of the optimization of energy recovery efficiency of a rotary energy recovery device

Cited by 22 publications

References 20 publications

Performance of Hypersaline Brine Desalination Using Spiral Wound Membrane: A Parametric Study

Performance of Hypersaline Brine Desalination Using Spiral Wound Membrane: A Parametric Study

A Novel Design of Centrifugal Pump Impeller for Hydropower Station Management Based on Multi-Objective Inverse Optimization

Performance analysis and techno-economic assessment of a developed cooling/preheating small PVT-RO desalination plant

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