Theoretical and Experimental Study on the Length-Diameter of the Regenerator in the Low Temperature Section of a 15 K Thermal-Coupled Two-Stage Pulse Tube Cryocooler

YIN Wang; WU Wenting; HUI Hejun; LIU Shaoshuai; JIANG Zhenhua; WU Yinong

doi:10.7652/xjtuxb202212019

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Theoretical and Experimental Study on the Length-Diameter of the Regenerator in the Low Temperature Section of a 15 K Thermal-Coupled Two-Stage Pulse Tube Cryocooler

更新时间：2025-07-09

- Theoretical and Experimental Study on the Length-Diameter of the Regenerator in the Low Temperature Section of a 15 K Thermal-Coupled Two-Stage Pulse Tube Cryocooler
- Vol. 56, Issue 12, Pages: 184-194(2022)
- 作者机构：
  
  1. 中国科学院上海技术物理研究所,上海,200083
  2. 中国科学院大学,北京,100049
  3. 上海理工大学能源与动力学院,上海,200093
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202212019
  CLC： TB651
- Online First：10 December 2022，
  
  Published：2022
- 稿件说明：
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YIN Wang, WU Wenting, HUI Hejun, et al. Theoretical and Experimental Study on the Length-Diameter of the Regenerator in the Low Temperature Section of a 15 K Thermal-Coupled Two-Stage Pulse Tube Cryocooler[J]. 2022, 56(12): 184-194.
DOI：

YIN Wang, WU Wenting, HUI Hejun, et al. Theoretical and Experimental Study on the Length-Diameter of the Regenerator in the Low Temperature Section of a 15 K Thermal-Coupled Two-Stage Pulse Tube Cryocooler[J]. 2022, 56(12): 184-194. DOI： 10.7652/xjtuxb202212019.

摘要

为了提高脉管制冷机的制冷量和效率

解决液氢温区以下多级脉管制冷机效率低下的问题

对关键部件之一的低温段回热器尺寸进行了设计优化。针对15 K两级脉管制冷机

首先采用数值模拟仿真的方法研究了低温段回热器尺寸对制冷机内部各项损失以及性能的影响

获得了等效长径比的最优值3.81; 然后研制了等效长径比分别为3.81、6.80的两种低温段回热器进行实验对比。实验结果表明

制冷机低温段回热器等效长径比为3.81时

制冷机性能更好

且在30 Hz下

可以在15 K获得制冷量0.91 W

此时各级总输入电功为386 W

整机的比卡诺效率达到4.45%。该研究可为制冷机低温段回热器的设计优化提供参考

对多级脉管制冷机的效率提升具有一定的指导意义。

Abstract

To improve the cooling capacity and efficiency of the pulse tube cryocooler and solve the problem of low efficiency of the multi-stage pulse tube cryocooler below the liquid hydrogen temperature area

the regenerator in the low temperature section is optimized in size. First

for the regenerator in the low temperature section of the 15 K two-stage pulse tube cryocooler

the influence of the regenerator size on the internal losses and performance is studied by numerical simulation

and it is obtained that the length-diameter ratio has an optimal value of 3.81. Then two kinds of regenerators with the length-diameter ratio of 3.81 and 6.80 are developed for experimental comparison. Experimental results show that the cryocooler has a better performance at the ratio of 3.81 and can obtain a maximum cooling capacity of 0.91 W at 15 K at 30 Hz. The total input power is 386 W and the rCOP reaches 4.45%. The research provides a reference for the design optimization of a regenerator in the low temperature section of the cryocooler and has guiding significance in improving efficiency of the multi-stage pulse tube cryocooler.

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references

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