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Integration of multiple bubble motion active transducers for improving energy-harvesting efficiency

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  • Wijewardhana, K. Rohana
  • Ekanayaka, Thilini K.
  • Jayaweera, E.N.
  • Shahzad, Amir
  • Song, Jang-Kun

Abstract

In energy-harvesting systems that collect energy from waste micromechanical energy, the integration of multiple systems is essential to improve the total harvesting energy. However, we found that a simple integration of multiple systems does not work in water–solid electrification systems working in water, such as bubble motion active transducers (BMATs), unlike their use for typical triboelectric nanogenerators. The difference comes from the presence of water, which acts as a conductor and increases the total capacitance in the electrode with the increase in the number of systems, reducing the electrification efficiency. We systematically investigate the underlying mechanism and suggest a method to integrate multiple BMAT systems without losing energy by introducing an individually rectified multi-electrode (IRME) circuit. The rectifiers in IRME provide two functions: the usual rectifier function and an isolation function that disconnects neighboring electrodes. We demonstrate that the IRME BMAT improves the energy harvesting efficiency by a factor of the number of integrated electrodes, and that the system connecting ten electrodes works well as a power source to light an LED brightly in-situ. This method provides a promising path to the development of actual BMAT applications.

Suggested Citation

  • Wijewardhana, K. Rohana & Ekanayaka, Thilini K. & Jayaweera, E.N. & Shahzad, Amir & Song, Jang-Kun, 2018. "Integration of multiple bubble motion active transducers for improving energy-harvesting efficiency," Energy, Elsevier, vol. 160(C), pages 648-653.
    • Handle: RePEc:eee:energy:v:160:y:2018:i:c:p:648-653
    DOI: 10.1016/j.energy.2018.07.058
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    References listed on IDEAS

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    1. Helseth, L.E. & Guo, X.D., 2016. "Fluorinated ethylene propylene thin film for water droplet energy harvesting," Renewable Energy, Elsevier, vol. 99(C), pages 845-851.
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    5. Wijewardhana, K. Rohana & Shen, Tian-Zi & Song, Jang-Kun, 2017. "Energy harvesting using air bubbles on hydrophobic surfaces containing embedded charges," Applied Energy, Elsevier, vol. 206(C), pages 432-438.
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    2. Chang, Chih-Chang & Huang, Wei-Hao & Mai, Van-Phung & Tsai, Jia-Shiuan & Yang, Ruey-Jen, 2021. "Experimental investigation into energy harvesting of NaCl droplet flow over graphene supported by silicon dioxide," Energy, Elsevier, vol. 229(C).
    3. Guan, Zhibin & Li, Ping & Wen, Yumei & Du, Yu & Wang, Guoda, 2023. "Bubble energy harvesting suitable for weak gas sources using bubble stream release scheme," Applied Energy, Elsevier, vol. 349(C).

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