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Optimization of miniature Joule-Thomson cryocooler with non-isometric recuperator on transient characteristics

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  • Chen, Hui
  • Wei, Chen-xi
  • Ding, Wen-hao
  • Liu, Ying-wen

Abstract

A novel J-T cryocooler transient performance evaluation criteria parameter, transient evaluation coefficient ξ, is proposed. It includes the cool-down time, refrigerant, and material consumption. The physical and analysis model of ξ of J-T cryocooler with typical and non-isometric structure recuperator was developed based on FORTRAN. We investigated the influence of three vital geometrical parameters (the demarcation point i, the fin pitch of the hot part fp1, and the fin pitch of the cold part fp2) on ξ of the JT cryocooler. And the structure of the recuperator was further optimized using response surface methodology (RSM). The optimization results are in good agreement with our model. It was discovered that the optimal structure accelerates the cool-down rate and uses less refrigerant with a lightweight equipment design. The p-d diagram of argon is analyzed to explain the good transient performance of the optimal first-sparse-then-dense structure. It illustrates the relationship between the fins configurations and mass flow rate. Adding fins to the spiral circles close to the cold end can accelerate the cool-down more effectively. The established optimization model provides helpful guidance for cool-down performance optimization.

Suggested Citation

  • Chen, Hui & Wei, Chen-xi & Ding, Wen-hao & Liu, Ying-wen, 2023. "Optimization of miniature Joule-Thomson cryocooler with non-isometric recuperator on transient characteristics," Energy, Elsevier, vol. 267(C).
    • Handle: RePEc:eee:energy:v:267:y:2023:i:c:s0360544222034399
    DOI: 10.1016/j.energy.2022.126552
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    References listed on IDEAS

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    1. Chen, Hui & Liu, Ying-wen, 2021. "A new optimization concept of the recuperator based on Hampson-type miniature cryocoolers," Energy, Elsevier, vol. 224(C).
    2. Singh, Sanjay Kumar & Mishra, Manish & Jha, P.K., 2014. "Nonuniformities in compact heat exchangers—scope for better energy utilization: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 583-596.
    3. Guo, Jiangfeng & Huai, Xiulan & Li, Xunfeng & Cai, Jun & Wang, Yongwei, 2013. "Multi-objective optimization of heat exchanger based on entransy dissipation theory in an irreversible Brayton cycle system," Energy, Elsevier, vol. 63(C), pages 95-102.
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