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Power Generation from a Hybrid Generator (TENG-EMG) Run by a Thermomagnetic Engine Harnessing Low Temperature Waste Heat

Author

Listed:
  • Zeeshan

    (Department of Nuclear and Energy Engineering, Jeju National University, Jeju 63243, Korea)

  • Rahate Ahmed

    (Department of Nuclear and Energy Engineering, Jeju National University, Jeju 63243, Korea)

  • Wongee Chun

    (Department of Nuclear and Energy Engineering, Jeju National University, Jeju 63243, Korea)

  • Seung Jin Oh

    (Clean Innovation Technology Group, Korea Institute of Industrial Technology, Jeju 63243, Korea)

  • Yeongmin Kim

    (Department of Nuclear and Energy Engineering, Jeju National University, Jeju 63243, Korea)

Abstract

This work explored the scavenging of low temperature waste heat and conversion of it into electrical energy through the operation of a gadolinium (Gd) based thermomagnetic engine. Gd is one of the unique materials whose magnetic property changes from ferromagnetic to paramagnetic depending on the temperature (“the Curie temperature”), which is around 20 °C. In the present work, two different types of generators were designed and applied to the rotating shaft of a Gd-based thermomagnetic engine developed for low temperature differential (LTD) applications. Of these, one is the so-called triboelectric nanogenerator (TENG), and the other is the electromagnetic generator (EMG). These have been designed to produce electricity from the rotating shaft of the thermomagnetic engine, exploiting both the electromagnetic and triboelectric effects. When operated at a rotational speed of 251 rpm with a temperature difference of 45 °C between the hot and cold water jets, the hybrid (TENG-EMG) generator produced a combined pulsating DC open circuit voltage of 5 V and a short circuit current of 0.7 mA. The hybrid generator effectively produced a maximum output power of 0.75 mW at a loading resistance of 10 kΩ.

Suggested Citation

  • Zeeshan & Rahate Ahmed & Wongee Chun & Seung Jin Oh & Yeongmin Kim, 2019. "Power Generation from a Hybrid Generator (TENG-EMG) Run by a Thermomagnetic Engine Harnessing Low Temperature Waste Heat," Energies, MDPI, vol. 12(9), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1774-:d:229936
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    References listed on IDEAS

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    1. Kongtragool, Bancha & Wongwises, Somchai, 2003. "A review of solar-powered Stirling engines and low temperature differential Stirling engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 7(2), pages 131-154, April.
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    Cited by:

    1. Yeongmin Kim & Muhammad Uzair Mehmood & Hyun Joo Han & Yu Jin Kim & Seung Jin Oh & Sang-Hoon Lim, 2022. "Reclaiming Power Potential from Low Temperature Waste Heat by Thermomagnetic Heat Engines," Energies, MDPI, vol. 15(8), pages 1-12, April.
    2. Zeeshan, & Panigrahi, Basanta Kumar & Ahmed, Rahate & Mehmood, Muhammad Uzair & Park, Jin Chul & Kim, Yeongmin & Chun, Wongee, 2021. "Operation of a low-temperature differential heat engine for power generation via hybrid nanogenerators," Applied Energy, Elsevier, vol. 285(C).
    3. Zeeshan & Muhammad Uzair Mehmood & Sungbo Cho, 2021. "Optimization of a Thermomagnetic Heat Engine for Harvesting Low Grade Thermal Energy," Energies, MDPI, vol. 14(18), pages 1-17, September.

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