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A numerical study of elastocaloric regenerators of tubular structures

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  • Zhu, Yuxiang
  • Zhou, Guoan
  • Cheng, Siyuan
  • Sun, Qingping
  • Yao, Shuhuai

Abstract

Solid-state elastocaloric cooling is increasingly recognized as preferred cooling technology to conventional vapor compressions without using coolants that are volatile atmospheric pollutants or greenhouse gases with global warming potential. However, the specific cooling power (SCP) of current prototypes has yet to be improved in meeting practical requirements. In this work, tubular nickel-titanium (NiTi) elastocaloric regenerators with enhanced heat transfer structures were proposed in order to increase cooling performance in compression-loaded regenerative systems. A numerical model was developed to evaluate this cooling performance. Using a nondimensional analysis of the governing equations, the model simplifies the investigation of the design and operation parameters and greatly reduces the computation complexity of the regenerative elastocaloric cooling systems. As a demonstration, the design principles have been applied to yield an elastocaloric regenerator of spiral-shaped tubular structures, which improves the maximum SCP and maximum temperature span by 186% and 146% respectively, compared to a plain tube design, proving that the numerical model provides a promising pathway for developing energy-efficient elastocaloric cooling systems.

Suggested Citation

  • Zhu, Yuxiang & Zhou, Guoan & Cheng, Siyuan & Sun, Qingping & Yao, Shuhuai, 2023. "A numerical study of elastocaloric regenerators of tubular structures," Applied Energy, Elsevier, vol. 339(C).
    • Handle: RePEc:eee:appene:v:339:y:2023:i:c:s0306261923003549
    DOI: 10.1016/j.apenergy.2023.120990
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    References listed on IDEAS

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    1. Sovacool, Benjamin K. & Griffiths, Steve & Kim, Jinsoo & Bazilian, Morgan, 2021. "Climate change and industrial F-gases: A critical and systematic review of developments, sociotechnical systems and policy options for reducing synthetic greenhouse gas emissions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    2. Qian, Suxin & Yuan, Lifen & Yu, Jianlin & Yan, Gang, 2017. "Numerical modeling of an active elastocaloric regenerator refrigerator with phase transformation kinetics and the matching principle for materials selection," Energy, Elsevier, vol. 141(C), pages 744-756.
    3. Jaka Tušek & Kurt Engelbrecht & Dan Eriksen & Stefano Dall’Olio & Janez Tušek & Nini Pryds, 2016. "A regenerative elastocaloric heat pump," Nature Energy, Nature, vol. 1(10), pages 1-6, October.
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    Cited by:

    1. Cai, Yuhao & Qian, Xin & Su, Ruihang & Jia, Xiongjie & Ying, Jinhui & Zhao, Tianshou & Jiang, Haoran, 2024. "Thermo-electrochemical modeling of thermally regenerative flow batteries," Applied Energy, Elsevier, vol. 355(C).
    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).

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