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Influence of length of resonance tubes on multi-stage looped thermoacoustic electric generator

Author

Listed:
  • Bi, Tianjiao
  • Wu, Zhanghua
  • Zhang, Limin
  • Xu, Jingyuan
  • Luo, Ercang
  • Li, Chao
  • Zhang, Bin
  • Chen, Wei

Abstract

Resonance tubes are often used to connect multi-stage looped thermoacoustic heat engine and linear alternators to form a multi-stage looped thermoacoustic electric generator. In this paper, we experimentally investigate the performance of a multi-stage looped thermoacoustic electric generator with two sets of resonance tubes of different lengths. With the increase of the length of resonance tubes from 1.5 m to 2 m, the system frequency decreases from 70 Hz to 62 Hz. The maximum output acoustic power increases from 6.97 kW to 8.16 kW, and the maximum output electric power increases from 5.09 kW to 6.24 kW. Meanwhile, the maximum thermoacoustic efficiency increases from 23.08 % to 23.94 %, the maximum acoustic-to-electric efficiency increases from 78.03 % to 82.06 % and the maximum thermal-to-electric efficiency increases from 17.79 % to 19.64 %. Numerical simulation is also conducted based on a 3-step coupling method and validates the experimental results. This study demonstrates that adjusting the length of resonance tubes in a multi-stage looped thermoacoustic electric generator is an effective way to tune the frequency as well as to improve the coupling between the multi-stage looped thermoacoustic heat engine and linear alternators.

Suggested Citation

  • Bi, Tianjiao & Wu, Zhanghua & Zhang, Limin & Xu, Jingyuan & Luo, Ercang & Li, Chao & Zhang, Bin & Chen, Wei, 2024. "Influence of length of resonance tubes on multi-stage looped thermoacoustic electric generator," Energy, Elsevier, vol. 302(C).
  • Handle: RePEc:eee:energy:v:302:y:2024:i:c:s0360544224014233
    DOI: 10.1016/j.energy.2024.131650
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    References listed on IDEAS

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    1. Wang, Kai & Sun, Daming & Zhang, Jie & Xu, Ya & Luo, Kai & Zhang, Ning & Zou, Jiang & Qiu, Limin, 2016. "An acoustically matched traveling-wave thermoacoustic generator achieving 750 W electric power," Energy, Elsevier, vol. 103(C), pages 313-321.
    2. Bi, Tianjiao & Wu, Zhanghua & Zhang, Limin & Yu, Guoyao & Luo, Ercang & Dai, Wei, 2017. "Development of a 5kW traveling-wave thermoacoustic electric generator," Applied Energy, Elsevier, vol. 185(P2), pages 1355-1361.
    3. Hamood, Ahmed & Jaworski, Artur J. & Mao, Xiaoan & Simpson, Kevin, 2018. "Design and construction of a two-stage thermoacoustic electricity generator with push-pull linear alternator," Energy, Elsevier, vol. 144(C), pages 61-72.
    4. Bi, Tianjiao & Wu, Zhanghua & Chen, Wei & Zhang, Limin & Luo, Ercang & Zhang, Bin, 2022. "Numerical and experimental research on a high-power 4-stage looped travelling-wave thermoacoustic electric generator," Energy, Elsevier, vol. 239(PB).
    5. Xu, Jingyuan & Hu, Jianying & Luo, Ercang & Zhang, Limin & Dai, Wei, 2019. "A cascade-looped thermoacoustic driven cryocooler with different-diameter resonance tubes. Part I: Theoretical analysis of thermodynamic performance and characteristics," Energy, Elsevier, vol. 181(C), pages 943-953.
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