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Improvement of the energy generation by pressure retarded osmosis

Author

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  • Nagy, Endre
  • Dudás, József
  • Hegedüs, Imre

Abstract

Applying the solute fluxes given for every single transport layer, namely external boundary layers, selective-, and the support layer, and even the cake layer, new expressions were developed to define the overall mass transfer coefficient and the interface solute concentrations. These equations make possible much deeper investigationof the mass transport process and process efficiency in pressure retarded osmosis system. It was stated that the effect of the feed side boundary layer on the energy generation must not be neglected without checking its effect. The extractable energy is dominated mainly by the membrane selectivity, structural parameter and also by the solute concentrations. Essential improvement of the membrane selectivity and/or decrease of the value of the structural parameter is needed to get more efficient pressure retarded osmosis process for energy extraction. Furthermore the increase of the draw solution concentration and/or decrease of the feed concentration should be regarded as an alternative process instead of seawater-river water pair.

Suggested Citation

  • Nagy, Endre & Dudás, József & Hegedüs, Imre, 2016. "Improvement of the energy generation by pressure retarded osmosis," Energy, Elsevier, vol. 116(P2), pages 1323-1333.
    • Handle: RePEc:eee:energy:v:116:y:2016:i:p2:p:1323-1333
    DOI: 10.1016/j.energy.2016.06.150
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    References listed on IDEAS

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    1. Maisonneuve, Jonathan & Pillay, Pragasen & Laflamme, Claude B., 2015. "Pressure-retarded osmotic power system model considering non-ideal effects," Renewable Energy, Elsevier, vol. 75(C), pages 416-424.
    2. Qureshi, Bilal Ahmed & Zubair, Syed M., 2015. "Exergetic analysis of a brackish water reverse osmosis desalination unit with various energy recovery systems," Energy, Elsevier, vol. 93(P1), pages 256-265.
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    1. Altaee, Ali & Zhou, John & Alhathal Alanezi, Adnan & Zaragoza, Guillermo, 2017. "Pressure retarded osmosis process for power generation: Feasibility, energy balance and controlling parameters," Applied Energy, Elsevier, vol. 206(C), pages 303-311.
    2. Chen, Yingxue & Vepa, Ranjan & Shaheed, Mohammad Hasan, 2018. "Enhanced and speedy energy extraction from a scaled-up pressure retarded osmosis process with a whale optimization based maximum power point tracking," Energy, Elsevier, vol. 153(C), pages 618-627.
    3. Kim, Minseok & Kim, Suhan, 2018. "Practical limit of energy production from seawater by full-scale pressure retarded osmosis," Energy, Elsevier, vol. 158(C), pages 373-382.
    4. Long, Rui & Lai, Xiaotian & Liu, Zhichun & Liu, Wei, 2019. "Pressure retarded osmosis: Operating in a compromise between power density and energy efficiency," Energy, Elsevier, vol. 172(C), pages 592-598.
    5. Touati, Khaled & Tadeo, Fernando & Elfil, Hamza, 2017. "Osmotic energy recovery from Reverse Osmosis using two-stage Pressure Retarded Osmosis," Energy, Elsevier, vol. 132(C), pages 213-224.

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