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Electrochemomechanical energy conversion efficiency in curved rectangular nanochannels

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  • Liu, Yongbo
  • Jian, Yongjun
  • Yang, Chunhong

Abstract

Nanofluidic devices based on electrokinetic phenomena can have a major impact on the investigations of electric energy harvesting due to the possibility of opening a new avenue in the exploration of new energy sources. Many efforts have been made by a lot of experts to improve the performance of these devices. However, these efforts are still focused mainly in straight channels. In present study, a curved nanochannel with rectangular cross section is introduced to enhance the electrokinetic energy conversion efficiency. In practice, curved channels are often encountered in lab-on-chip systems due to the advantage of increasing the effective channel length per unit chip length in the flow direction. However, despite its importance, no one have investigated the electric energy conversion in such channels before. We present a theoretical study based on the solution of the linearized Poisson-Boltzmann equation. Our model yields analytical expressions for electrostatic potentials, fluid velocity, streaming potential and the energy conversion efficiency. The results show that, under certain parameter ranges, the electric energy conversion efficiency in curved rectangular nanochannel is 1.17 times larger than that in a straight one. The present endeavor is useful in designing more effective electrochemomechanical energy conversion devices.

Suggested Citation

  • Liu, Yongbo & Jian, Yongjun & Yang, Chunhong, 2020. "Electrochemomechanical energy conversion efficiency in curved rectangular nanochannels," Energy, Elsevier, vol. 198(C).
    • Handle: RePEc:eee:energy:v:198:y:2020:i:c:s0360544220305089
    DOI: 10.1016/j.energy.2020.117401
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    References listed on IDEAS

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    1. Ranjit, N.K. & Shit, G.C., 2017. "Entropy generation on electro-osmotic flow pumping by a uniform peristaltic wave under magnetic environment," Energy, Elsevier, vol. 128(C), pages 649-660.
    2. Chanda, Sourayon & Tsai, Peichun Amy, 2019. "Numerical simulation of renewable power generation using reverse electrodialysis," Energy, Elsevier, vol. 176(C), pages 531-543.
    3. Xie, Zhi-Yong & Jian, Yong-Jun, 2017. "Entropy generation of two-layer magnetohydrodynamic electroosmotic flow through microparallel channels," Energy, Elsevier, vol. 139(C), pages 1080-1093.
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    Citations

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    Cited by:

    1. Xie, Zhiyong & Jian, Yongjun, 2020. "Electrokinetic energy conversion of nanofluids in MHD-based microtube," Energy, Elsevier, vol. 212(C).
    2. Saha, Sujit & Kundu, Balaram, 2023. "Multi-objective optimization of electrokinetic energy conversion efficiency and entropy generation for streaming potential driven electromagnetohydrodynamic flow of couple stress Casson fluid in micro," Energy, Elsevier, vol. 284(C).
    3. Xie, Zhiyong & Jian, Yongjun, 2022. "Electrokinetic energy conversion of power-law fluids in a slit nanochannel beyond Debye-Hückel linearization," Energy, Elsevier, vol. 252(C).

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