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A continuous concentration gradient flow electrical energy storage system based on reverse osmosis and pressure retarded osmosis

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  • Long, Rui
  • Lai, Xiaotian
  • Liu, Zhichun
  • Liu, Wei

Abstract

A continuous concentration gradient flow electrical energy storage system is presented to store the electricity generated by the renewable energy power, which consists of reverse osmosis, generating concentrated salty streams under the external power input, and pressure retarded osmosis, extracting electricity from the produced Gibbs free energy of mixing. The hybrid system is simulated on the module scale under the perfect membrane assumption. The operation parameters that impact the overall performance of the proposed system are systematically investigated. Results reveal that there exist optimal reverse osmosis and pressure retarded osmosis operation pressures leading to a maximum round-trip energy efficiency under given feed solution distribution factor. The distinct thermodynamically limiting operation regimes are identified based on analytical calculation. In the feed limited regime (FLR), a round-trip energy efficiency of 38.27% has been achieved, indicating its potential application of the proposed energy storage system.

Suggested Citation

  • Long, Rui & Lai, Xiaotian & Liu, Zhichun & Liu, Wei, 2018. "A continuous concentration gradient flow electrical energy storage system based on reverse osmosis and pressure retarded osmosis," Energy, Elsevier, vol. 152(C), pages 896-905.
    • Handle: RePEc:eee:energy:v:152:y:2018:i:c:p:896-905
    DOI: 10.1016/j.energy.2018.04.022
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    References listed on IDEAS

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    1. Long, Rui & Li, Baode & Liu, Zhichun & Liu, Wei, 2015. "A hybrid system using a regenerative electrochemical cycle to harvest waste heat from the proton exchange membrane fuel cell," Energy, Elsevier, vol. 93(P2), pages 2079-2086.
    2. Long, R. & Bao, Y.J. & Huang, X.M. & Liu, W., 2014. "Exergy analysis and working fluid selection of organic Rankine cycle for low grade waste heat recovery," Energy, Elsevier, vol. 73(C), pages 475-483.
    3. Long, Rui & Li, Baode & Liu, Zhichun & Liu, Wei, 2015. "Performance analysis of a thermally regenerative electrochemical cycle for harvesting waste heat," Energy, Elsevier, vol. 87(C), pages 463-469.
    4. Aneke, Mathew & Wang, Meihong, 2016. "Energy storage technologies and real life applications – A state of the art review," Applied Energy, Elsevier, vol. 179(C), pages 350-377.
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    7. Long, Rui & Li, Baode & Liu, Zhichun & Liu, Wei, 2015. "Performance analysis of a solar-powered solid state heat engine for electricity generation," Energy, Elsevier, vol. 93(P1), pages 165-172.
    8. Long, Rui & Li, Baode & Liu, Zhichun & Liu, Wei, 2018. "Reverse electrodialysis: Modelling and performance analysis based on multi-objective optimization," Energy, Elsevier, vol. 151(C), pages 1-10.
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    Cited by:

    1. Long, Rui & Zhao, Yanan & Luo, Zuoqing & Li, Lei & Liu, Zhichun & Liu, Wei, 2020. "Alternative thermal regenerative osmotic heat engines for low-grade heat harvesting," Energy, Elsevier, vol. 195(C).
    2. 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.
    3. Zhao, Yanan & Luo, Zuoqing & Long, Rui & Liu, Zhichun & Liu, Wei, 2020. "Performance evaluations of an adsorption-based power and cooling cogeneration system under different operative conditions and working fluids," Energy, Elsevier, vol. 204(C).
    4. Lai, Xiaotian & Long, Rui & Liu, Zhichun & Liu, Wei, 2018. "Stirling engine powered reverse osmosis for brackish water desalination to utilize moderate temperature heat," Energy, Elsevier, vol. 165(PA), pages 916-930.
    5. Long, Rui & Li, Baode & Liu, Zhichun & Liu, Wei, 2018. "Performance analysis of reverse electrodialysis stacks: Channel geometry and flow rate optimization," Energy, Elsevier, vol. 158(C), pages 427-436.
    6. Bargiacchi, Eleonora & Orciuolo, Francesco & Ferrari, Lorenzo & Desideri, Umberto, 2020. "Use of Pressure-Retarded-Osmosis to reduce Reverse Osmosis energy consumption by exploiting hypersaline flows," Energy, Elsevier, vol. 211(C).

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