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Self-powered water condition monitoring system based on rotational electromagnetic generator

Author

Listed:
  • Zhou, Xu
  • Mei, Mingqi
  • Tang, Tianyi
  • Li, Yunfei
  • Wang, Zizhao
  • Zhu, Yu
  • Yan, Bin
  • Lin, Hao
  • Li, Zhen
  • Liu, Huicong

Abstract

As a widely available clean energy source in nature, water flow energy provides a research avenue for energy harvesting and environmental monitoring. This work proposes a self-powered water condition monitoring system based on rotational electromagnetic generator (WCM-EMG). The WCM-EMG adopts a fully enclosed design that collects energy by converting water flow into rotational motion, eventually generating electrical output based on electromagnetic induction. Through the optimization of impeller parameters, WCM-EMG can obtain higher electrical output with lower water head loss. At a flow velocity of 1.5 m/s and load resistance of 25 Ω, the WCM-EMG generates a power output of 606 mW and power density of 0.93 mW/cm3 while the head loss is only 2.5 m. For one thing, the WCM-EMG achieves a high-power supply for self-powering of the temperature, pH and turbidity sensors. For another, by processing the frequency of the electrical signal of WCM-EMG, the self-sensing of water flow velocity can be realized in real-time. By harvesting the kinetic energy of fluid flow, this work offers an encouraging solution for developing integrated multi-parameter intelligent sensing system that encompasses energy harvesting, self-sensing and monitoring, enabling passive zero-carbon sensing in the Internet of Things (IoT).

Suggested Citation

  • Zhou, Xu & Mei, Mingqi & Tang, Tianyi & Li, Yunfei & Wang, Zizhao & Zhu, Yu & Yan, Bin & Lin, Hao & Li, Zhen & Liu, Huicong, 2025. "Self-powered water condition monitoring system based on rotational electromagnetic generator," Energy, Elsevier, vol. 326(C).
    • Handle: RePEc:eee:energy:v:326:y:2025:i:c:s0360544225017669
    DOI: 10.1016/j.energy.2025.136124
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