| 摘要: |
| 很多电子器件在低温环境下工作具有更强的性能，但低温电子器件的广泛应用仍然受到制冷技术微型化落后的牵制。本文研究了一种基于多元混合工质的闭式节流制冷系统，该系统由Hampson型微型节流制冷机与线性压缩机相结合，工质采用摩尔浓度为39%甲烷/20l%乙烷/41%异丁烷三元混合物，实验研究了制冷机在不同工况条件下的降温性能。结果表明：制冷机在0.10~1.77 MPa和0.14~1.90 MPa压力条件下均可实现165 K的制冷温度，在0.36~1.73 MPa和0.18~1.36 MPa压力条件下均可实现198 K的制冷温度。该系统结构紧凑，有利于促进低温电子器件在国防军事、空间科学和生物医疗等领域的应用。 |
| 关键词: 制冷机 节流效应 混合工质 线性压缩机 |
| DOI： |
| Received:August 09, 2021Revised:September 22, 2021 |
| 基金项目:国家自然科学基金（52076115）和北京市自然科学基金（3212019）资助。 |
|
| A Mixed-refrigerant Miniature Joule-Thomson Cooler Driven by a Linear Compressor |
|
Cao Haishan1, Meng Qinghang1, Tong Xin2, Liu Biqiang1, Wang Xiaotao3
|
| (1.Department of Energy and Power Engineering, Tsinghua University Beijing;2.Kunming Institute of Physics;3.Technical Institute of Physics and Chemistry, Chinese Academy of Science) |
| Abstract: |
| Many electronic devices can benefit from operating at low temperatures. However, the widespread use of cryogenic electronic devices is limited by the miniaturization of cryocoolers. In this study, a closed Joule-Thomson (JT) cooling system based on a multicomponent mixture was investigated. The system comprised a Hampson-JT microcooler and a linear compressor. The working fluid was a ternary mixture with a molar concentration of 39% methane, 20% ethane, and 41% isobutane. The cooling performance of a refrigerator under different conditions was studied experimentally. The results show that the microcooler can achieve a cold-end temperature of 165 K under 0.10–1.77 MPa and 0.14–1.90 MPa pressure, and 198 K under 0.36–1.73 MPa and 0.18–1.36 MPa pressure. The compact structure of the cooling system promotes the application of cryogenic electronic devices in the fields of military, space science, and biomedicine. |
| Key words: cooler Joule-Thomson effect mixed-refrigerant linear compressor |
