Study on the Dynamic Cooling Performance of a -150 ℃ Reverse Brayton Cycle Air Cryocooler

doi:10.7652/xjtuxb201303011

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Study on the Dynamic Cooling Performance of a -150 ℃ Reverse Brayton Cycle Air Cryocooler

更新时间：2025-07-09

- Study on the Dynamic Cooling Performance of a -150 ℃ Reverse Brayton Cycle Air Cryocooler
- Vol. 47, Issue 3, Pages: 60-63+101(2013)
- 作者机构：
  
  1. 中国建筑西南设计研究院有限公司,成都,610041
  2. 西安交通大学制冷与低温工程研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201303011
  CLC： TK05
- Online First：10 March 2013，
  
  Published：2013
- 稿件说明：
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Study on the Dynamic Cooling Performance of a -150 ℃ Reverse Brayton Cycle Air Cryocooler[J]. 2013, 47(3): 60-63+101.
DOI：

Study on the Dynamic Cooling Performance of a -150 ℃ Reverse Brayton Cycle Air Cryocooler[J]. 2013, 47(3): 60-63+101. DOI： 10.7652/xjtuxb201303011.

摘要

为了研究空气制冷机的动态温降特性

对采用工作轮直径为24 mm的小型透平膨胀机和板翅式换热器的逆布雷顿循环空气制冷机实验台进行了改进。采用高真空绝热冷箱对制冷机进行绝热

可使绝对压力低于10

-3

得到的设计制冷温度为-150 ℃。对不同进口参数和采用不同直径风机轮的制冷机工况进行了实验研究

获得了透平膨胀机的实际温降曲线; 以实验系统为基础建立了数学模型

得到了相应的理论温降曲线。研究结果表明:风机轮尺寸对空气制冷机动态温降过程的影响较大

实验的最低温度低于-150 ℃; 所建理论模型能够较好地预测实际系统温降的过程。

Abstract

A turboexpander having a working wheel with a diameter of 24 mm and a plate-fin heat exchanger were applied in a retrofitted -150 ℃ air cryocooler system. A vacuum cryogenic trap(absolute pressure

-3

Pa)was used for insulation. The dynamic cooling performance of the whole system was studied under the conditions of different brake wheel configurations. A numerical model in respect of the dynamic cooling performance of the -150 ℃ air cryocooler system was established. The results show that the brake wheel size significantly affects the cooling performance of the cryocooler

and the lowest system temperature is under -150 ℃. Additionally

the numerical results agree well with the experimental data.

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references

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赵红利, 侯予, 陈汝刚, 等. -120 ℃小型逆布雷顿空气制冷机性能的实验研究 [J]. 西安交通大学学报, 2007, 41(8): 986-990.

ZHAO Hongli, HOU Yu, CHEN Rugang, et al. Experimental study on the performance of a small inverse Brayton air refrigerator a -120 ℃ [J]. Journal of Xi'an Jiaotong University, 2007, 41(8): 986-990.

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