Enhanced exergy analysis of a full-scale brackish water reverse osmosis desalination plant

Fellaou, S.; Ruiz-García, A.; Gourich, Bouchaib

doi:10.1016/j.desal.2021.114999

Cited by 29 publications

(12 citation statements)

References 38 publications

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“…The retentate water from the RO modules (6, 8, 10 and 12) (stage A) are companied and fed to the next stage in the first pass of RO process to produce a retentate at (14,16), and then is discharged into the drainage system at position (18) after being mixed with the collected retentate of stage B. However, the permeate water streams (5, 7, 9, and 11) and permeate from next parallel stages (13,15) are mixed with the permeate of stage B at position (17). Then, this permeate is fed into the membrane modules in first stage of second pass RO process by two high pressure pumps.…”

Section: General Overview Of the Ro System Of The Apc And Tested Loca...mentioning

confidence: 99%

“…In this regard, the necessity of energy is directly related to the operating conditions where an increase in the feed salinity or pressure would cause an increase in the supplied energy [13,14]. Although the RO process requires less than half the energy needed for thermal processes [15], research on improving the existing water desalination plants is progressively increasing to introduce the RO process as the most reliable, efficient and economical option compared to other involved water treatment technologies [16,17]. In this regard, the brackish and seawater water RO desalination systems consume about 3.6 kj/kg, and 5.4 kj/kg to 9 kj/kg, respectively [18].…”

Section: Introductionmentioning

confidence: 99%

“…The main intention of the recent research studies was to investigate the most reliant parts of energy dissipation. The exergy based on thermodynamic properties was on top of other methodologies used to explore the energy losses in actual RO desalination plants [17]. In any process, exergy differs from energy in that exergy is always destroyed and not conserved.…”

Section: Introductionmentioning

confidence: 99%

“…However, the overall system exergy efficiency is about 5.82%, and the exergy destruction limited to 35.5% using an energy recovery device of a Pelton turbine as compared with using an expansion valve. More recently, Fellaou et al [17] analysed the exergy destruction of a full-scale RO desalination system located in the Canary Island, Spain. This analysis revealed that the membrane modules have the largest thermodynamic losses of 64.28%, whilst he high-pressures pump and the feed pump accounted for losses of 40.84% and 38.48%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Limitations and Exergy Analysis of Brackish Water Reverse Osmosis Desalination Process

et al. 2021

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The reverse osmosis (RO) process is one of the most popular membrane technologies for the generation of freshwater from seawater and brackish water resources. An industrial scale RO desalination consumes a considerable amount of energy due to the exergy destruction in several units of the process. To mitigate these limitations, several colleagues focused on delivering feasible options to resolve these issues. Most importantly, the intention was to specify the most units responsible for dissipating energy. However, in the literature, no research has been done on the analysis of exergy losses and thermodynamic limitations of the RO system of the Arab Potash Company (APC). Specifically, the RO system of the APC is designed as a medium-sized, multistage, multi pass spiral wound brackish water RO desalination plant with a capacity of 1200 m3/day. Therefore, this paper intends to fill this gap and critically investigate the distribution of exergy destruction by incorporating both physical and chemical exergies of several units and compartments of the RO system. To carry out this study, a sub-model of exergy analysis was collected from the open literature and embedded into the original RO model developed by the authors of this study. The simulation results explored the most sections that cause the highest energy destruction. Specifically, it is confirmed that the major exergy destruction happens in the product stream with 95.8% of the total exergy input. However, the lowest exergy destruction happens in the mixing location of permeate of the first pass of RO desalination system with 62.28% of the total exergy input.

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Section: General Overview Of the Ro System Of The Apc And Tested Loca...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamic Limitations and Exergy Analysis of Brackish Water Reverse Osmosis Desalination Process

et al. 2021

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“…A study by Griffiths and Wilson [6] found that the US water production sector has contributed to the carbon footprint, and accounts for 5% of all carbon emissions. Optimization of the best RO methods is achieved via improved membrane technology (low permeable membrane or composite fouling), high pressure pump selection, and renewable energy use [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Carbon Footprint-Energy Detection for Desalination Small Plant Adaptation Response

et al. 2021

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The Life Cycle Assessment (LCA) system, which can be used as a decision support tool for managing environmental sustainability, includes carbon footprint assessment as one of the available methodologies. In this study, a carbon footprint assessment was used to investigate seawater production systems of a desalination plant in Senok, Kelantan, Malaysia. Three stages of the desalination plant processing system were investigated and the inventory database was developed using the relevant model framework. Subsequently, measurements and interpretations were performed on several key indicators such as greenhouse gases, energy efficiency, acidic gases, smog, and toxic gases. Overall, the results of the study indicate that the Reverse Osmosis (RO) technology that is used in the desalination plant in the study area is one of the best options to meet the demands of the environmental sustainability agenda (SDGs). This is due to the lower carbon dioxide (CO2) emission, of about 3.5 × 10−2 kg of CO2 eq per m3/year, that was recorded for the entire operation of the system. However, several factors that influence important errors in carbon footprint decisions, such as the lack of EIA reporting data and the literature on carbon footprint in the Malaysian scenario, in addition to direct and indirect carbon input calculations, need to be identified in more detail in future research.

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Advanced Exergy Analysis of Cascade Rankine Cycle‐Driven Reverse Osmosis System

Raninga,

Mudgal,

Patel

et al. 2024

Energy Tech

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A novel solar‐assisted cascade Rankine cycle‐driven reverse osmosis (RO) system is proposed and evaluated using conventional and advanced exergy analysis. The system comprises a solar collector as a heat input, steam Rankine cycle (SRC), and organic Rankine cycle (ORC) to generate turbine work and RO units for brackish water treatment. Water and R1233zd(E) are used as the working fluid in the SRC and ORC, respectively. The RO system is proposed to produce 1 m3 h−1 of permeate water from each RO unit. Conventional exergy analysis shows that the solar collector exhibits the highest exergy destruction of 0.798 kW, followed by the RO unit. However, advanced exergy analysis reveals that only 16.16% of the avoidable exergy in solar collectors can be reduced due to technical constraints. Advanced exergy analysis identified that endogenous avoidable exergy destruction contributes 24% of overall exergy destruction, which can be reduced by optimizing operating parameters and making technical improvements. The RO unit has a higher exogenous avoidable exergy, potentially suggesting improvements in other system component parameters. The advanced exergy analysis also prioritized the components for improving system performance in a sequence of RO high‐pressure pumps, RO modules, solar collector, ORC condenser, evaporative condenser, ORC expander, and SRC turbine.

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Enhanced exergy analysis of a full-scale brackish water reverse osmosis desalination plant

Cited by 29 publications

References 38 publications

Thermodynamic Limitations and Exergy Analysis of Brackish Water Reverse Osmosis Desalination Process

Thermodynamic Limitations and Exergy Analysis of Brackish Water Reverse Osmosis Desalination Process

Carbon Footprint-Energy Detection for Desalination Small Plant Adaptation Response

Advanced Exergy Analysis of Cascade Rankine Cycle‐Driven Reverse Osmosis System

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