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Phase modulation analysis on a cavity-structured single-unit thermoacoustic refrigerator

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Listed:
  • Hu, Yiwei
  • Wu, Zhanghua
  • Yang, Rui
  • Luo, Ercang
  • Xu, Jingyuan

Abstract

The establishment of traveling-wave-dominated acoustic fields within the regenerator is crucial for developing highly efficient thermoacoustic refrigeration systems. The present work introduces a novel looped, single-unit, direct-coupling thermoacoustic refrigerator, incorporating an optimally dimensioned cavity at a strategic location to maximize system performance. Central to this research is the systematic exploration of the phase modulation mechanism. This exploration involves adjusting the dimensions of the cavity structure, tracking its evolution from initial absence to full integration. The research method includes comprehensive evaluations of steady-state performance, onset characteristics, exergy loss, and axial parameter distribution analysis. The findings are visually depicted through simulations, highlighting the cavity's role in acoustic field modulation and its consequent impact on system efficiency. With the integration of an optimally sized and positioned cavity, the system's cooling efficiency improves by more than 2.5 times compared to the efficiency of a structure without cavities. A prototype replicating the proposed design was then constructed and experimentally tested. The results reveal a close correlation between the simulated and experimental data, affirming the analysis's accuracy and dependability. These studies effectively elucidate the significance of the cavity in looped single-unit thermoacoustic refrigerators and provide valuable insights for the development of more efficient phase modulation structures.

Suggested Citation

  • Hu, Yiwei & Wu, Zhanghua & Yang, Rui & Luo, Ercang & Xu, Jingyuan, 2024. "Phase modulation analysis on a cavity-structured single-unit thermoacoustic refrigerator," Energy, Elsevier, vol. 310(C).
    • Handle: RePEc:eee:energy:v:310:y:2024:i:c:s0360544224029463
    DOI: 10.1016/j.energy.2024.133171
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    References listed on IDEAS

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