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Continuous and efficient elastocaloric air cooling by coil-bending

Author

Listed:
  • Xueshi Li

    (The Hong Kong University of Science and Technology, Kowloon)

  • Peng Hua

    (The Hong Kong University of Science and Technology, Kowloon
    HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen)

  • Qingping Sun

    (The Hong Kong University of Science and Technology, Kowloon
    HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen)

Abstract

Elastocaloric cooling has emerged as an eco-friendly technology capable of eliminating greenhouse-gas refrigerants. However, its development is limited by the large driving force and low efficiency in uniaxial loading modes. Here, we present a low-force and energy-efficient elastocaloric air cooling approach based on coil-bending of NiTi ribbons/wires. Our air cooler achieves continuous cold outlet air with a temperature drop of 10.6 K and a specific cooling power of 2.5 W g−1 at a low specific driving force of 26 N g−1. Notably, the cooler shows a system coefficient of performance of 3.7 (ratio of cooling power to rotational mechanical power). These values are realized by the large specific heat transfer area (12.6 cm2 g−1) and the constant cold zone of NiTi wires. Our coil-bending system exhibits a competitive performance among caloric air coolers.

Suggested Citation

  • Xueshi Li & Peng Hua & Qingping Sun, 2023. "Continuous and efficient elastocaloric air cooling by coil-bending," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43611-6
    DOI: 10.1038/s41467-023-43611-6
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    References listed on IDEAS

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    1. F. Greibich & R. Schwödiauer & G. Mao & D. Wirthl & M. Drack & R. Baumgartner & A. Kogler & J. Stadlbauer & S. Bauer & N. Arnold & M. Kaltenbrunner, 2021. "Elastocaloric heat pump with specific cooling power of 20.9 W g–1 exploiting snap-through instability and strain-induced crystallization," Nature Energy, Nature, vol. 6(3), pages 260-267, March.
    2. Zhang, Jiongjiong & Zhu, Yuxiang & Cheng, Siyuan & Yao, Shuhuai & Sun, Qingping, 2023. "Effect of inactive section on cooling performance of compressive elastocaloric refrigeration prototype," Applied Energy, Elsevier, vol. 351(C).
    3. Jongchansitto, P. & Yachai, T. & Preechawuttipong, I. & Boufayed, R. & Balandraud, X., 2021. "Concept of mechanocaloric granular material made from shape memory alloy," Energy, Elsevier, vol. 219(C).
    4. Shixian Zhang & Quanling Yang & Chenjian Li & Yuheng Fu & Huaqing Zhang & Zhiwei Ye & Xingnan Zhou & Qi Li & Tao Wang & Shan Wang & Wenqing Zhang & Chuanxi Xiong & Qing Wang, 2022. "Solid-state cooling by elastocaloric polymer with uniform chain-lengths," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
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