Experimental Study on the Performance of a Small Inverse Brayton Air Refrigerator at -120 ℃

赵红利; 侯予; 陈汝刚; 陈纯正

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Experimental Study on the Performance of a Small Inverse Brayton Air Refrigerator at -120 ℃

更新时间：2025-12-08

- Experimental Study on the Performance of a Small Inverse Brayton Air Refrigerator at -120 ℃
- Vol. 41, Issue 8, Pages: 986-990(2007)
- 作者机构：
  
  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：
  CLC： TB651
- Online First：10 August 2007，
  
  Published：2007
- 稿件说明：
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赵红利, 侯予, 陈汝刚, et al. Experimental Study on the Performance of a Small Inverse Brayton Air Refrigerator at -120 ℃[J]. 2007, 41(8): 986-990.
DOI：

赵红利, 侯予, 陈汝刚, et al. Experimental Study on the Performance of a Small Inverse Brayton Air Refrigerator at -120 ℃[J]. 2007, 41(8): 986-990. DOI：

摘要

在改建的逆布雷顿空气制冷机多功能综合试验台上

分别对一台空气制冷机关键部件(膨胀机和紧凑式换热器)在设计工况下的效率、降温、流阻、热负荷和制冷效果等热力性能进行了全面的试验分析

并进行了各种超工况下的综合性能考核.试验结果表明:该空气制冷机的制冷范围为-73 ℃(制冷量为250 W)～-120 ℃(制冷量为50 W)

膨胀机效率最大达60.5%

回热器效率最高达97.5%

系统降温最大达150 ℃

制冷机最低温度达-123 ℃

并能满足-120 ℃下50 W热负荷需求.通过试验分析得出了小型高速透平膨胀机和紧凑式换热器中各参数间的影响关系

以及制冷机中各参数的匹配关系.

Abstract

A multipurpose test-bed for inverse Brayton air refrigerator was rebuilt

in which the experiments were executed on the two key parts of the system

the turbo expander and the compact heat exchanger. The thermodynamic performances of efficiency

temperature drop characteristics

flow resistance

and refrigeration effect

etc. were analyzed thoroughly under design conditions

and examinations were done under overworking conditions. The test results show that the refrigeration capacity of this refrigerator is -73 ℃(with the cooling load of 250 W)～-120 ℃(with the cooling load of 50 W)

the maximum temperature difference between system inlet and expander outlet is 150 ℃

and the expander efficiency can reach 60.5% while the heat exchanger efficiency reaches 97.5%. The minimum temperature of the system reaches -123 ℃

which meets the requirement of heat load of 5 W at -120 ℃. Through the test and analysis

the parameters influence relation and the parameters matching relation in high speed small turbo-expanders and compact heat exchangers are obtained.

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Keywords

references

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侯予,陈纯正,熊联友,等.低温氦透平膨胀机的热力设计及性能分析[J]. 西安交通大学学报, 2003,37(7):666-669.

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刘立强,熊联友,侯予,等. 透平膨胀机热力性能的理论预测 [J]. 低温工程,1998,104(4):5-10.

Liu Liqiang, Xiong Lianyou, Hou Yu,et al.The theoretical prediction of thermal performance of turbo-expanders [J]. Cryogenics, 1998,104(4):5-10.

王可,侯予,杨金焕,等.透平逆布雷顿循环空气制冷机性能分析(一)——数学模型[J].流体机械,2003, 31(12):39-42.

Wang Ke, Hou Yu, Yang Jinhuan, et al.The performance analysis of reverse-Brayton cryocooler(1)-mathematical model [J]. Fluid Machinery, 2003, 31(12):39-42.

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