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Double helix rotating TENGs driven by ultra-low loading for harvesting high-entropy water flow energy

Author

Listed:
  • Jin, Almas
  • Gao, Xiaobo
  • Hang, Xiukun
  • Gao, Wei
  • Ou, Zhiqiang
  • Wang, Zhong Lin
  • Chen, Baodong

Abstract

Water flow energy in rivers and lakes is a huge clean energy source and widely distributed in nature. Its low water velocity makes it difficult for electromagnetic generators to effectively harvest this energy. Therefore, harvesting high-entropy water flow energy is of great significance to the development of distributed power supply and sensing. In this study, we present a double helix rotating triboelectric nanogenerator (DHR-TENG) that can effectively convert the ultra-low water flow energy into electrical energy. DHR-TENG is designed to optimize space utilization and has a reciprocating transmission mechanism to ensure the continuous operation, achieving a surprisingly high charge density of 356.69 μC m−3 and peak power density of 11.66 W m−3. Compared with similar structures reported by predecessors, the maximum elevation is about 242 times and 2 times, respectively. A stable electrical output performance was achieved by DHR-TENG at ultra-low water flow velocity of 0.4–0.8 m/s, the harvested energy can drive self-powered temperature sensor systems and wireless signal transmission systems. This work not only effectively improves the electrical output performance at ultra-low water flow velocity, but also helps to promote environmental monitoring and provides a feasible method for establishing early warning in the environment.

Suggested Citation

  • Jin, Almas & Gao, Xiaobo & Hang, Xiukun & Gao, Wei & Ou, Zhiqiang & Wang, Zhong Lin & Chen, Baodong, 2025. "Double helix rotating TENGs driven by ultra-low loading for harvesting high-entropy water flow energy," Renewable Energy, Elsevier, vol. 238(C).
    • Handle: RePEc:eee:renene:v:238:y:2025:i:c:s0960148124019876
    DOI: 10.1016/j.renene.2024.121919
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    References listed on IDEAS

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    1. Bahaj, AbuBakr S., 2011. "Generating electricity from the oceans," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(7), pages 3399-3416, September.
    2. Zdankus, Narimantas & Punys, Petras & Zdankus, Tadas, 2014. "Conversion of lowland river flow kinetic energy," Renewable and Sustainable Energy Reviews, Elsevier, vol. 38(C), pages 121-130.
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