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Efficient roller-driven elastocaloric refrigerator

Author

Listed:
  • Sijia Yao

    (Xi’an Jiaotong University)

  • Pengfei Dang

    (Xi’an Jiaotong University)

  • Yiming Li

    (Xi’an Jiaotong University)

  • Yao Wang

    (Xi’an Jiaotong University)

  • Xi Zhang

    (Xi’an Jiaotong University)

  • Ye Liu

    (Xi’an Jiaotong University)

  • Suxin Qian

    (Xi’an Jiaotong University
    Xi’an Jiaotong University)

  • Dezhen Xue

    (Xi’an Jiaotong University)

  • Ya-Ling He

    (Xi’an Jiaotong University)

Abstract

Elastocaloric cooling has experienced fast development over the past decade owing to its potential to reshape the refrigeration industry. While the solid-state elastocaloric refrigerant is emission-free, the efficiency of the state-of-the-art elastocaloric cooling systems is not sufficient yet to reduce carbon emissions during operation. In this study, we double the coefficient of performance, the most commonly used efficiency metric, via the synergy of material-level advances in TiNiCu and the system-level roller-driven mechanism capable of recovering kinetic energy. On the materials level, a 125% improvement in coefficient of performance is illustrated in TiNiCu compared to NiTi, empowered by the B2-B19 martensitic transformation with improved lattice compatibility and the grain boundary strengthening from the nanocrystalline structure. On the system level, owing to the properly sized angular momentum in rotating parts, 78% work recovery efficiency is reported, transcending the theoretical limit previously unattainable without kinetic energy recovery. This confluence of materials and mechanical innovations propels elastocaloric cooling systems into a new realm of efficiency and paves the way for their practical application.

Suggested Citation

  • Sijia Yao & Pengfei Dang & Yiming Li & Yao Wang & Xi Zhang & Ye Liu & Suxin Qian & Dezhen Xue & Ya-Ling He, 2024. "Efficient roller-driven elastocaloric refrigerator," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51632-y
    DOI: 10.1038/s41467-024-51632-y
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